The Cosmic Origins Spectrograph

Abstract

The Cosmic Origins Spectrograph (COS) is a moderate-resolution spectrograph with unprecedented sensitivity that was installed into the Hubble Space Telescope (HST) in May 2009, during HST Servicing Mission 4 (STS-125). We present the design philosophy and summarize the key characteristics of the instrument that will be of interest to potential observers. For faint targets, with flux F_lambda ~ 1.0E10-14 ergs/s/cm2/Angstrom, COS can achieve comparable signal to noise (when compared to STIS echelle modes) in 1-2% of the observing time. This has led to a significant increase in the total data volume and data quality available to the community. For example, in the first 20 months of science operation (September 2009 - June 2011) the cumulative redshift pathlength of extragalactic sight lines sampled by COS is 9 times that sampled at moderate resolution in 19 previous years of Hubble observations. COS programs have observed 214 distinct lines of sight suitable for study of the intergalactic medium as of June 2011. COS has measured, for the first time with high reliability, broad Lya absorbers and Ne VIII in the intergalactic medium, and observed the HeII reionization epoch along multiple sightlines. COS has detected the first CO emission and absorption in the UV spectra of low-mass circumstellar disks at the epoch of giant planet formation, and detected multiple ionization states of metals in extra-solar planetary atmospheres. In the coming years, COS will continue its census of intergalactic gas, probe galactic and cosmic structure, and explore physics in our solar system and Galaxy.

17 pages, 15 figures

References in corpus (14)

• The Mass-Metallicity Relation at z~2
• Observational constraints on Cosmic Reionization
• The present-day star formation rate of the Milky-Way determined from Spitzer detected young stellar objects
• Ultraviolet Survey of CO and H_2 in Diffuse Molecular Clouds: The Reflection of Two Photochemistry Regimes in Abundance Relationships
• A High-Resolution Survey of Low-Redshift QSO Absorption Lines: Statistics and Physical Conditions of O VI Absorbers
• The Low-z Intergalactic Medium. III. HI and Metal Absorbers at z<0.4
• Direct Measurement of the Ratio of Carbon Monoxide to Molecular Hydrogen in the Diffuse Interstellar Medium
• Physical Properties, Baryon Content, and Evolution of the LyαForest: New Insights from High Resolution Observations at z < 0.4
• The Origins of Fluorescent H2 Emission From T Tauri~Stars
• Lyman alpha emitting galaxies at 0.2 < z < 0.35 from GALEX spectroscopy
• Metallicity and Ionization in High Velocity Cloud Complex C
• A STIS Survey for OVI Absorption Systems at 0.12 < z < 0.5 I.: The Statistical Properties of Ionized Gas
• The Far-Ultraviolet "Continuum" in Protoplanetary Disk Systems II: CO Fourth Positive Emission and Absorption
• Hubble-COS Observations of Galactic High-Velocity Clouds: Four AGN Sight Lines through Complex C

Cited by in corpus (330)

• The COS-Halos Survey: Physical Conditions and Baryonic Mass in the Low-Redshift Circumgalactic Medium
• Gaseous Galaxy Halos
• The frequency of planetary debris around young white dwarfs
• The MUSCLES Treasury Survey I: Motivation and Overview
• The COS-Halos Survey: Rationale, Design, and A Census of Circumgalactic Neutral Hydrogen
• The COS-Halos Survey: An Empirical Description of the Metal-Line Absorption in the Low-Redshift Circumgalactic Medium
• Detection of high Lyman continuum leakage from four low-redshift compact star-forming galaxies
• Space Telescope and Optical Reverberation Mapping Project. III. Optical Continuum Emission and Broad-Band Time Delays in NGC 5548
• Characterizing the Circumgalactic Medium of Nearby Galaxies with HST/COS and HST/STIS Absorption-Line Spectroscopy
• High Density Circumstellar Interaction in the Luminous Type IIn SN 2010jl: The first 1100 days
• The Ultraviolet Radiation Environment Around M dwarf Exoplanet Host Stars
• The COS-Dwarfs Survey: The Carbon Reservoir Around sub-L* Galaxies
• A fast and long-lived outflow from the supermassive black hole in NGC 5548
• J1154+2443: a low-redshift compact star-forming galaxy with a 46 per cent leakage of Lyman continuum photons
• Near-UV Absorption, Chromospheric Activity, and Star-Planet Interactions in the WASP-12 system
• The Bimodal Metallicity Distribution of the Cool Circumgalactic Medium at z<1
• The COS-Halos Survey: Origins of the Highly Ionized Circumgalactic Medium of Star-Forming Galaxies
• The Origins of the Circumgalactic Medium in the FIRE Simulations
• Anatomy of the AGN in NGC 5548: I. A global model for the broadband spectral energy distribution
• An HST/COS Survey of the Low-Redshift IGM. I. Survey, Methodology, & Overall Results
• The Low-Redshift Lyman Continuum Survey I: New, Diverse Local Lyman-Continuum Emitters
• Carbon and Oxygen Abundances in Low Metallicity Dwarf Galaxies
• The Mass and Momentum Outflow Rates of Photoionized Galactic Outflows
• Space Telescope and Optical Reverberation Mapping Project. I. Ultraviolet Observations of the Seyfert 1 Galaxy NGC 5548 with the Cosmic Origins Spectrograph on Hubble Space Telescope
• Characterizing Circumgalactic Gas around Massive Ellipticals at z~0.4 - II. Physical Properties and Elemental Abundances
• On the possible environmental effect in distributing heavy elements beyond individual gaseous halos
• The COS/UVES Absorption Survey of the Magellanic Stream. III: Ionization, Total Mass, and Inflow Rate onto the Milky Way
• Scaling Relations Between Warm Galactic Outflows and Their Host Galaxies
• Not Dead Yet: Cool Circumgalactic Gas in the Halos of Early Type Galaxies
• Direct Detection of Lyman Continuum Escape from Local Starburst Galaxies with the Cosmic Origins Spectrograph
• Mining Circumgalactic Baryons in the Low-Redshift Universe
• Constraining the metallicities, ages, star formation histories, and ionizing continua of extragalactic massive star populations
• Metal-enriched galactic outflows shape the mass-metallicity relationship
• An Optical View of BL Lacertae Objects
• HST-COS Observations of AGN. II. Extended Survey of Ultraviolet Composite Spectra from 159 Active Galactic Nuclei
• The Role of Cosmic Ray Transport in Shaping the Simulated Circumgalactic Medium
• Instrumentation for the detection and characterization of exoplanets
• Accurately predicting the escape fraction of ionizing photons using restframe ultraviolet absorption lines
• The Properties of Low Redshift Intergalactic O VI Absorbers Determined from High S/N Observations of 14 QSOs with the Cosmic Origins Spectrograph
• Baryon Cycles in the Biggest Galaxies
• Evidence for a Massive, Extended Circumgalactic Medium Around the Andromeda Galaxy
• An HST/COS legacy survey of high-velocity ultraviolet absorption in the Milky Way's circumgalactic medium and the Local Group
• A Universal Density Structure for Circum-Galactic Gas
• The origin of the escape of Lyman alpha and ionizing photons in Lyman Continuum Emitters
• Probing the Fermi Bubbles in Ultraviolet Absorption: A Spectroscopic Signature of the Milky Way's Biconical Nuclear Outflow
• Are high redshift Galaxies hot? - Temperature of z > 5 Galaxies and Implications on their Dust Properties
• Early and Extended Helium Reionization Over More Than 600 Million Years of Cosmic Time
• Computing Intrinsic Lyman-alpha Fluxes of F5 V to M5 V Stars
• A Hubble Space Telescope Survey of H2 Emission in the Circumstellar Environments of Young Stars
• High-velocity clouds as streams of ionized and neutral gas in the halo of the Milky Way
• Neutral gas properties of Lyman continuum emitting galaxies: column densities and covering fractions from UV absorption lines
• Hot Gas Lines in T Tauri Stars
• Optically-Thin Spatially-Resolved Mg II Emission Maps the Escape of Ionizing Photons
• Anatomy of the AGN in NGC 5548: II. The Spatial, Temporal and Physical Nature of the Outflow from HST/COS Observations
• Nuclear Outflow of the Milky Way: Studying the Kinematics and Spatial Extent of the Northern Fermi Bubble
• The Type Icn SN 2021csp: Implications for the Origins of the Fastest Supernovae and the Fates of Wolf-Rayet Stars
• The Impact of Starbursts on the Circumgalactic Medium
• Kinematics of Circumgalactic Gas: Feeding Galaxies and Feedback
• The High-Energy Radiation Environment Around a 10 Gyr M Dwarf: Habitable at Last?
• The rise of an ionized wind in the Narrow Line Seyfert 1 Galaxy Mrk 335 observed by XMM-Newton and HST
• The COS/UVES Absorption Survey of the Magellanic Stream: II. Evidence for a complex enrichment history of the Stream from the Fairall 9 sightline
• The extent of chemically enriched gas around star-forming dwarf galaxies
• Shining A Light On Galactic Outflows: Photo-Ionized Outflows
• High-resolution Ultraviolet Radiation Fields of Classical T Tauri Stars
• Do galaxies that leak ionizing photons have extreme outflows?
• The COS/UVES Absorption Survey of the Magellanic Stream: I. One-Tenth Solar Abundances along the Body of the Stream
• Project AMIGA: The Circumgalactic Medium of Andromeda
• Characterizing the Circumgalactic Medium of Nearby Galaxies with HST/COS and HST/STIS Absorption-Line Spectroscopy: II. Methods and Models
• QSO Absorption Systems Detected in Ne VIII: High-Metallicity Clouds with a Large Effective Cross Section
• The Metagalactic Ionizing Background: A Crisis in UV Photon Production or Incorrect Galaxy Escape Fractions?
• The Fates of the Circumgalactic Medium in the FIRE Simulations
• Column Density Profiles of Multi-Phase Gaseous Halos
• Implications of the large OVI columns around low-redshift $L_{\ast }$ galaxies
• An Extreme Metallicity, Large-Scale Outflow from a Star-Forming Galaxy at z ~ 0.4
• The COS Absorption Survey of Baryon Harbors (CASBaH): Warm-hot Circumgalactic Gas Reservoirs Traced by Ne VIII Absorption
• A new technique for finding galaxies leaking Lyman-continuum radiation: [SII]-deficiency
• The Close AGN Reference Survey (CARS) - What is causing Mrk1018's return to the shadows after 30 years?
• A Semi-Analytical Line Transfer (SALT) model to interpret the spectra of galaxy outflows
• The Cosmic Ultraviolet Baryon Survey (CUBS) I. Overview and the diverse environments of Lyman limit systems at z<1
• The LyAlpha Line Profiles of Ultraluminous Infrared Galaxies: Fast Winds and Lyman Continuum Leakage
• Tracing the Cosmic Metal Evolution in the Low-Redshift Intergalactic Medium
• The low-redshift intergalactic medium as seen in archival legacy Hubble/STIS and FUSE data
• Does a Differentiated, Carbonate-Rich, Rocky Object Pollute the White Dwarf SDSSJ104341.53+085558.2?
• The Mega-MUSCLES Spectral Energy Distribution Of TRAPPIST-1
• Absorption-Line Detections of $10^{5-6}$ K Gas in Spiral-Rich Groups of Galaxies
• A Fast Flare and Direct Redshift Constraint in Far-UV Spectra of the Blazar S50716+714
• Low-metallicity Absorbers Account for Half of the Dense Circumgalactic Gas at z < 1
• Lyman alpha dominance of the Classical T Tauri FUV Radiation Field
• Chemical enrichment and physical conditions in I Zw 18
• Hubble Space Telescope observations of the NUV transit of WASP-12b
• On the Metallicity and Origin of the Smith High-Velocity Cloud
• Probing the IGM-galaxy connection at z<0.5 II. New insights into the galaxy environments of OVI absorbers in PKS 0405-123
• On the connection between the intergalactic medium and galaxies: The HI-galaxy cross-correlation at z < 1
• A Robust Measurement of the Mass Outflow Rate of the Galactic Outflow from NGC 6090
• Absorption signatures of warm-hot gas at low redshift: Broad HI Lyman-Alpha Absorbers
• CO/H2 Abundance Ratio ~ 10^{-4} in a Protoplanetary Disk
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• On the model of the circumgalactic mist: the implications of cloud sizes in galactic winds and halos
• Elemental depletions in the Magellanic Clouds and the evolution of depletions with metallicity
• Supermassive Black Hole Winds in X-rays -- SUBWAYS. I. Ultra-fast outflows in QSOs beyond the local Universe
• The Mass Inflow and Outflow Rates of the Milky Way
• Metal-enriched halo gas across galaxy overdensities over the last 10 billion years
• The Complete Ultraviolet Spectrum of the Archetypal "Wind-Dominated" Quasar Mrk~231: Absorption and Emission from a High-Speed Dusty Nuclear Outflow
• HST spectra reveal accretion in MY Lupi
• The evolution of HI and CIV quasar absorption line systems at 1.9 < z < 3.2
• The Structure of the Circumgalactic Medium of Galaxies: Cool Accretion Inflow Around NGC 1097
• The nuclear environment of the NLS1 Mrk 335: obscuration of the X-ray line emission by a variable outflow
• Simulating the diversity of shapes of the Lyman-$\alpha$ line
• The Cosmic Ultraviolet Baryon Survey (CUBS) -- III. Physical properties and elemental abundances of Lyman limit systems at $z<1$
• The first measurement of the quasar lifetime distribution
• On the Significance of Absorption Features in HST/COS Data
• A persistent ultraviolet outflow from an accreting neutron star binary transient
• Towards the statistical detection of the warm-hot intergalactic medium in inter-cluster filaments of the cosmic web
• Space Telescope and Optical Reverberation Mapping Project. VIII. Time Variability of Emission and Absorption in NGC 5548 Based on Modeling the Ultraviolet Spectrum
• Spectral shapes of the Lyman-alpha emission from galaxies: I. blueshifted emission and intrinsic invariance with redshift
• Space Telescope and Optical Reverberation Mapping Project. XII. Broad-Line Region Modeling of NGC 5548
• The Dispersion of Fast Radio Bursts from a Structured Intergalactic Medium at Redshifts z < 1.5
• The Composite Spectrum of BOSS Quasars Selected for Studies of the Lyman-alpha Forest
• Warm-hot Gas in X-ray Bright Galaxy Clusters and the H I-deficient Circumgalactic Medium in Dense Environments
• CLASSY II: A technical Overview of the COS Legacy Archive Spectroscopic SurveY
• The Hubble PanCET program: An extensive search for metallic ions in the exosphere of GJ 436 b
• Horizontal spreading of planetary debris accreted by white dwarfs
• The COS Absorption Survey of Baryon Harbors: Unveiling the Physical Conditions of Circumgalactic Gas through Multiphase Bayesian Ionization Modeling
• The Surprising Absence of Absorption in the Far-Ultraviolet Spectrum of Mrk 231
• HST/COS Spectra of Three QSOs That Probe The Circumgalactic Medium of a Single Spiral Galaxy: Evidence for Gas Recycling and Outflow
• Intermediate- and high-velocity clouds in the Milky Way I: covering factors and vertical heights
• The COS CGM Compendium (CCC). I: Survey Design and Initial Results
• Warm Gas in the Virgo Cluster: I. Distribution of Lya Absorbers
• The Evolution of the HeII-Ionizing Background at Redshifts 2.3<z<3.8 Inferred from a Statistical Sample of 24 HST/COS HeII Ly$\alpha$ Absorption Spectra
• Variability of Disk Emission in Pre-Main Sequence and Related Stars. III. Exploring Structural Changes in the Pre-transitional Disk in HD 169142
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• Photoionized emission and absorption features in the high-resolution X-ray spectra of NGC 3783
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• An HST/COS survey of molecular hydrogen in DLAs & sub-DLAs at z < 1: Molecular fraction and excitation temperature
• HST/COS Observations of Quasar Outflows in the 500-1050 Å Rest Frame: I. The Most Energetic Outflows in the Universe and Other Discoveries
• The XMM-Newton/HST view of the obscuring outflow in the Seyfert Galaxy Mrk 335 observed at extremely low X-ray flux
• The High-Ion Content and Kinematics of Low-Redshift Lyman Limit Systems
• The Physical Origins of the Identified and Still Missing Components of the Warm-Hot Intergalactic Medium: Insights from Deep Surveys in the Field of Blazar 1ES1553+113
• Discovery of a fast, broad, transient outflow in NGC 985
• Instability of Supersonic Cold Streams Feeding Galaxies II. Nonlinear Evolution of Surface and Body Modes of Kelvin-Helmholtz Instability
• Supernova-Driven Outflows in NGC 7552: A Comparison of H-alpha and UV Tracers
• A Deep Search For Faint Galaxies Associated With Very Low-redshift C IV Absorbers: II. Program Design, Absorption-line Measurements, and Absorber Statistics
• Can magnetic fields suppress convection in the atmosphere of cool white dwarfs? A case study on WD2105-820
• The Nature of Ionized Gas in the Milky Way Galactic Fountain
• The CGM${}^2$ Survey: Circumgalactic O VI from dwarf to massive star-forming galaxies
• Evidence for Short $\sim 1$ Myr Lifetimes from the He II Proximity Zones of $z\sim 4$ Quasars
• Direct Measurement of Interstellar Extinction Toward Young Stars Using Atomic Hydrogen Lyman-$\alpha$ Absorption
• The Ultra-Fast Outflow of the Quasar PG 1211+143 as Viewed by Time-Averaged Chandra Grating Spectroscopy
• HST/COS observations of a new population of associated QSO absorbers
• COS-Weak: Probing the CGM using analogs of weak Mg II absorbers at z < 0.3
• Detection of Phosphorus, Sulphur, and Zinc in the Carbon-Enhanced Metal-Poor Star BD+44 493
• The K2-3 system revisited: testing photoevaporation and core-powered mass loss with three small planets spanning the radius valley
• HST/COS Observations of Thirteen New He II Quasars
• A Galaxy Redshift Survey near HST/COS AGN Sight Lines
• Not So Heavy Metals: Black Hole Feedback Enriches The Circumgalactic Medium
• Ionisation in atmospheres of brown dwarfs and extrasolar planets VI: Properties of large-scale discharge events
• Quasar Sightline and Galaxy Evolution (QSAGE) Survey - I. The Galaxy Environment of OVI Absorbers up to z=1.4 around PKS 0232-04
• Probing the large and massive CGM of a galaxy at z ~ 0.2 using a pair of quasars
• A compact, metal-rich, kpc-scale outflow in FBQS J0209-0438: Detailed diagnostics from HST/COS extreme UV observations
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• Molecular Hydrogen Absorption from the Halo of a z ~ 0.4 Galaxy
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• Cosmic Origins Spectrograph Observations of Warm Intervening Gas Towards 3C263
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• The 1600 Angstrom Emission Bump in Protoplanetary Disks: A Spectral Signature of H${}_2$O Dissociation
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• The COS Absorption Survey of Baryon Harbors: The Galaxy Database and Cross-Correlation Analysis of OVI Systems
• Atomic Chemistry In Turbulent Astrophysical Media I: Effect of Atomic Cooling
• The source of leaking ionizing photons from Haro11 -- Clues from HST/COS spectroscopy of knots A, B and C
• Heavy metals in a light white dwarf: Abundances of the metal-rich, extremely low-mass GALEX J1717+6757
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• Delving into the depths of NGC 3783 with XRISM. I. Kinematic and ionization structure of the highly ionized outflows
• The COS-AGN survey: Revealing the nature of circum-galactic gas around hosts of active galactic nuclei
• New Evidence for Extended HeII Reionization at z>3.5 from HeII Lyman Alpha and Beta Transmission Spikes
• A Deep Search for Faint Galaxies Associated with Very Low-Redshift C IV Absorbers: A Case with Cold-Accretion Characteristics
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• HST/COS Observations of Quasar Outflows in the 500 -- 1050 Å Rest Frame: IV. The Largest Broad Absorption Line Acceleration
• Far-UV spectroscopy of the planet-hosting star WASP-13: high-energy irradiance, distance, age, planetary mass-loss rate, and circumstellar environment
• Transient obscuration event captured in NGC 3227. I. Continuum model for the broadband spectral energy distribution
• Dating individual quasars with the HeII proximity effect
• Grain Destruction in a Supernova Remnant Shock Wave
• Discovery of a transparent sightline at ρ < 20 kpc from an interacting pair of galaxies
• The high-energy spectrum of the nearby planet-hosting inactive mid-M dwarf LHS 3844
• Phase-resolved spectroscopic analysis of the eclipsing black hole X-ray binary M33 X-7: System properties, accretion, and evolution
• Detection of Two Intervening Ne VIII Absorbers Probing Warm Gas at z~0.6
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• Ultraviolet Spectroscopy of Rapidly-Rotating Solar-Mass Stars: Emission Line Redshifts as a Test of the Solar-Stellar Connection
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• ZELDA: fitting Lyman-alpha line profiles using deep learning
• Directly tracing cool filamentary accretion over >100 kpc into the interstellar medium of a quasar host at z=1
• Supermassive Black Hole Winds in X-rays -- SUBWAYS. III. A population study on ultra-fast outflows
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• Coronal X-Ray Emission from Nearby, Low-Mass, Exoplanet Host Stars Observed by the MUSCLES and Mega-MUSCLES HST Treasury Survey Projects
• Searching for FUV line emission from $10^7$ K gas in massive elliptical galaxies and galaxy clusters as a tracer of turbulent velocities
• Probing the Inner Regions of Protoplanetary Disks with CO Absorption Line Spectroscopy
• The QuaStar Survey: Detecting Hidden Low-Velocity Gas in the Milky Way's Circumgalactic Medium
• The Warm Gas in the MW: A Kinematical Model
• Highly Ionized Collimated Outflow from HE 0238 - 1904
• X-Shooting ULLYSES: Massive stars at low metallicity. IV. Spectral analysis methods and exemplary results for O stars
• Multi-wavelength observations of the obscuring wind in the radio-quiet quasar MR 2251-178
• The Spread of Metals into the Low-Redshift Intergalactic Medium
• HST/COS Observations of Quasar Outflows in the 500-1050 Å Rest Frame: III. Four Similar Outflows in 2MASS J1051+1247 with Enough Energy to be Major Contributors to AGN Feedback
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• Multiwavelength campaign on Mrk 509 IX. The Galactic foreground
• Multiwavelength Campaign on Mrk 509 X. Lower limit on the distance of the absorber from HST COS and STIS spectroscopy
• A hot gaseous galaxy halo candidate with Mg X absorption
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• The COS-legacy survey of C IV absorbers: properties and origins of the intervening systems
• Using cosmological simulations and synthetic absorption spectra to assess the accuracy of observationally derived CGM metallicities
• HST/COS Observations of Quasar Outflows in the 500 -- 1050 Å Rest Frame: VI Wide, Energetic Outflows in SDSS J0755+2306
• The Lyman Alpha Spectral Database (LASD)
• Discovery of an HI-rich Gas Reservoir in the Outskirts of SZ-effect Selected Clusters
• On the Covering Fraction Variability in an EUV Mini-BAL Outflow from PG 1206+459
• FIREBall-2: The Faint Intergalactic Medium Redshifted Emission Balloon Telescope
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• On the relation between Lya absorbers and local galaxy filaments
• C IV absorbers tracing cool gas in dense galaxy group/cluster environments
• The Radial Distribution and Excitation of H2 around Young Stars in the HST-ULLYSES Survey
• Probing UV-Sensitive Pathways for CN and HCN Formation in Protoplanetary Disks with the Hubble Space Telescope
• Spatially Resolved Gas Flows Around the Milky Way
• Transient obscuration event captured in NGC 3227 III. Photoionization modeling of the X-ray obscuration event in 2019
• Observations of Outflowing UV Absorbers in NGC 4051 with the Cosmic Origins Spectrograph
• Hyades Member K2-136c: The Smallest Planet in an Open Cluster with a Precisely Measured Mass
• Detection of Dust in High-Velocity Cloud Complex C -- Enriched Gas Accreting onto the Milky Way
• The relationship between gas and galaxies at z<1 using the Q0107 quasar triplet
• A systematic study of galactic outflows via fluorescence emission: implications for their size and structure
• Supermassive Black Hole Winds in X-rays: SUBWAYS. II. HST UV spectroscopy of winds at intermediate redshifts
• HST+COS spectra of the double white dwarf CSS 41177 place the secondary inside the pulsational instability strip
• COS Observations of the Cosmic Web: A Search for the Cooler Components of a Hot, X-ray Identified Filament
• Constraining UV Continuum Slopes of Active Galactic Nuclei With CLOUDY Models of Broad Line Region EUV Emission Lines
• Periodic optical variability and debris accretion in white dwarfs: a test for a causal connection
• FK Comae Berenices, King of Spin: The COCOA-PUFS Project
• SDSS J124043.01+671034.68: The partially burned remnant of a low-mass white dwarf that underwent thermonuclear ignition?
• Circumgalactic gas at its extreme: tidal gas streams around the Whale galaxy NGC 4631 explored with HST/COS
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• Signatures of Hot Molecular Hydrogen Absorption from Protoplanetary Disks: I. Non-thermal Populations
• Observations of the Ultraviolet-Bright Star Barnard 29 in the Globular Cluster M13 (NGC 6205)
• Detection of Low Metallicity Warm Plasma in a Galaxy Overdensity Environment at z ~ 0.2
• The Circumgalactic Medium in Massive Halos
• Lyman-alpha Scattering Models Trace Accretion and Outflow Kinematics in T Tauri Systems
• Testing Lyman alpha emission line reconstruction routines at multiple velocities in one system
• The high-velocity clouds above the disk of the outer Milky Way: misty precipitating gas in a region roiled by stellar streams
• Spatially-resolved UV diagnostics of AGN feedback: radiation pressure dominates in a prototypical quasar-driven superwind
• Detection of a Multiphase Intragroup Medium: Results from the COS-IGrM Survey
• UV Fluorescence Traces Gas and LyA Evolution in Protoplanetary Disks
• Multi-wavelength campaign on NGC 7469 V. Analysis of the HST/COS observations: Super solar metallicity, distance, and trough variation models
• Discovery of a young pre-intermediate polar
• Extremely broad Lyman-alpha line emission from the molecular intra-group medium in Stephan's Quintet: evidence for a turbulent cascade in a highly clumpy multi-phase medium?
• A Search for H I Lyman $\alpha$ Counterparts to Ultra-Fast X-ray Outflows
• Evidence of hot high velocity photoionized plasma falling on actively accreting T-Tauri Stars
• HST/COS Observations of Quasar Outflows in the 500-1050 Angstrom Rest Frame: VII. Distances and Energetics for 11 Outflows in Five Quasars
• Probing Large Galaxy Halos at $z\sim 0$ with Automated $\mathrm{Ly}\alpha$-Absorption Matching
• Far-Ultraviolet Spectroscopy Of Active Galactic Nuclei With AstroSat/UVIT
• A population of high-velocity absorption-line systems residing in the Local Group
• Measuring the thermal and ionization state of the low-$z$ IGM using likelihood free inference
• Accelerating Galaxy Winds During the Big Bang of Starbursts
• HST/COS Spectra of the Wind Lines of VFTS 102 and 285
• DIISC-I: The Discovery of Kinematically Anomalous HI Clouds in M 100
• Transient obscuration event captured in NGC 3227 IV. Origin of the obscuring cloud variability
• Investigating the Lyman photon escape in local starburst galaxies with the Cosmic Origins Spectrograph
• The MUSE Extremely Deep Field: Classifying the Spectral Shapes of Lya Emitting Galaxies
• DIISC-II: Unveiling the Connections between Star Formation and ISM in the Extended Ultraviolet Disk of NGC 3344
• AGN STORM 2: I. First results: A Change in the Weather of Mrk 817
• FORECASTOR -- I. Finding Optics Requirements and Exposure times for the Cosmological Advanced Survey Telescope for Optical and UV Research mission
• A Detection of Gas Associated with the M 31 Stellar Stream
• Multiwavelength campaign on Mrk 509. XVI. Continued HST/COS monitoring of the far-ultraviolet spectrum
• NGTS and HST insights into the long period modulation in GW Librae
• HeII Ly$\alpha$ Transmission Spikes and Absorption Troughs in Eight High-resolution Spectra Probing the End of HeII Reionization
• X-Shooting ULLYSES: Massive Stars at Low Metallicity X. Physical Parameters and Feedback of Massive Stars in the LMC N11 B Star-Forming Region
• Scientific Objectives for UV/Visible Astrophysics Investigations: A Summary of Responses by the Community (2012)
• A half-ring of ionized circumstellar material trapped in the magnetosphere of a white dwarf merger remnant
• Spectroscopic Investigation of Nebular Gas (SING): Instrument Design, Assembly and Calibration
• Multi-wavelength spectroscopic analysis of the ULX Holmberg II X-1 and its nebula suggests the presence of a heavy black hole accreting from a B-type donor
• X-Shooting ULLYSES: Massive stars at low metallicity. XIII. Putting the bi-stability jump to the test in the LMC
• Extremely iron-poor O-type stars in the Magellanic Bridge
• New Gapless COS G140L Mode Proposed for Background-Limited Far-UV Observations
• Identifying the Lens Galaxy B1152+199 as a Ghostly Damped Lyman Alpha System by the Cosmic Origins Spectrograph
• The COS-Holes Survey: Connecting Galaxy Black Hole Mass with the State of the CGM
• Absorption line abundances in the SMC-like galaxy UGC 5282: evidence for ISM dilution from inflows on kiloparsec scales
• Evidence of a Disk-wind Origin for Fluorescent H${}_2$ in Classical T Tauri Stars
• On the Size and Mass of Photo-ionized Clouds in Extended Spiral Galaxy Halos
• zELDA II: reconstruction of galactic Lyman-alpha spectra attenuated by the intergalactic medium using neural networks
• CHESS: an Innovative Concept for High-Resolution, Far-UV Spectroscopy
• Optical design options for Pollux: UV spectropolarimeter project for the Habitable Worlds Observatory
• The igmspec Database of Public Spectra Probing the Intergalactic Medium
• MUSEQuBES: Physical conditions, origins, and multi-element abundances of the circumgalactic medium of an isolated, star-forming dwarf galaxy at z=0.57
• Ultraviolet Spectra of Comets: Rejecting the Detection of Pentacene, Toluene, and Fe+
• Far-UV Fe Emission as Proxy of Eddington Ratios
• Modelling gas around galaxy pairs and groups using the Q0107 quasar triplet
• UV astronomy with small satellites
• The Near Ultraviolet Transient Surveyor (NUTS): An ultraviolet telescope to observe variable sources
• UV counterpart of an X-ray ultra-fast outflow in IRAS 17020+4544
• The Halo21 Absorption Modeling Challenge: Lessons From "Observing" Synthetic Circumgalactic Absorption Spectra
• Spectroscopic Line Modeling of the Fastest Rotating O-type Stars
• Stellar flare-driven evolution of primordial early exo-Earth atmospheres: Insights from a Young M Dwarf Flare model
• Unveiling the faint ultraviolet Universe
• Observations of the Bright Star in the Globular Cluster 47 Tucanae (NGC 104)
• Studying the gaseous outskirts of galaxy groups with coherent Ly alpha absorption patterns