The ODYSSEUS Survey. Motivation and First Results: Accretion, Ejection, and Disk Irradiation of CVSO 109

Abstract

The Hubble UV Legacy Library of Young Stars as Essential Standards (ULLYSES) Director's Discretionary Program of low-mass pre-main-sequence stars, coupled with forthcoming data from ALMA and JWST, will provide the foundation to revolutionize our understanding of the relationship between young stars and their protoplanetary disks. A comprehensive evaluation of the physics of disk evolution and planet formation requires understanding the intricate relationships between mass accretion, mass outflow, and disk structure. Here we describe the Outflows and Disks around Young Stars: Synergies for the Exploration of ULLYSES Spectra (ODYSSEUS) Survey and present initial results of the classical T Tauri Star CVSO 109 in Orion OB1b as a demonstration of the science that will result from the survey. ODYSSEUS will analyze the ULLYSES spectral database, ensuring a uniform and systematic approach in order to (1) measure how the accretion flow depends on the accretion rate and magnetic structures, (2) determine where winds and jets are launched and how mass-loss rates compare with accretion, and (3) establish the influence of FUV radiation on the chemistry of the warm inner regions of planet-forming disks. ODYSSEUS will also acquire and provide contemporaneous observations at X-ray, optical, NIR, and millimeter wavelengths to enhance the impact of the ULLYSES data. Our goal is to provide a consistent framework to accurately measure the level and evolution of mass accretion in protoplanetary disks, the properties and magnitudes of inner-disk mass loss, and the influence of UV radiation fields that determine ionization levels and drive disk chemistry.

arXiv commentaccepted to ApJ

References in corpus (99)

• Intrinsic Colors, Temperatures, and Bolometric Corrections of Pre-Main Sequence Stars
• MESA Isochrones and Stellar Tracks (MIST) 0: Methods for the construction of stellar isochrones
• The Man Behind the Curtain: X-rays Drive the UV through NIR Variability in the 2013 AGN Outburst in NGC 2617
• Cosmic-Ray Rejection by Laplacian Edge Detection
• The All-Sky Automated Survey for Supernovae (ASAS-SN) Light Curve Server v1.0
• The effects of snowlines on C/O in planetary atmospheres
• The eROSITA X-ray telescope on SRG
• Magnetic fields of non-degenerate stars
• Accretion Disks around Young Objects. I. The Detailed Vertical Structure
• Empirical Color Transformations Between SDSS Photometry and Other Photometric Systems
• Accretion Disks Around Young Objects. III. Grain Growth
• Accretion Disks Around Young Objects. II. Tests of Well-Mixed Models with Ism Dust
• The Disk Substructures at High Angular Resolution Project (DSHARP): II. Characteristics of Annular Substructures
• X-Shooter spectroscopy of young stellar objects in Lupus: Accretion properties of class II and transitional objects
• Effects of Dust Growth and Settling in T Tauri Disks
• Observations of Protoplanetary Disk Structures
• Evidence for Accretion: High-Resolution X-ray Spectroscopy of the Classical T Tauri Star TW Hydrae
• Discovery of seven T Tauri stars and a brown dwarf candidate in the nearby TW Hydrae Association
• Magnetic Inhibition of Convection and the Fundamental Properties of Low-Mass Stars. III. A Consistent 10 Myr Age for the Upper Scorpius OB Association
• The APOGEE-2 Survey of the Orion Star Forming Complex II: Six-dimensional structure
• CHIRON - A Fiber Fed Spectrometer for Precise Radial Velocities
• An Analysis of the Shapes of Interstellar Extinction Curves. VII. Milky Way Spectrophotometric Optical-through-Ultraviolet Extinction and Its R-Dependence
• Unveiling the Structure of Pre-Transitional Disks
• The Truncated Disk of CoKu Tau/4
• Probing T Tauri Accretion and Outflow with 1 Micron Spectroscopy
• Unveiling the Inner Disk Structure of T Tauri Stars
• Accretion Rates for T Tauri Stars Using Nearly Simultaneous Ultraviolet and Optical Spectra
• The Structure and Emission of the Accretion Shock in T Tauri Stars II: the Ultraviolet Continuum Emission
• The FUV spectrum of TW Hya. I. Observations of H${}_2$ Fluorescence
• On the formation of H-alpha line emission around classical T Tauri stars
• A Spitzer Survey of Mid-Infrared Molecular Emission from Protoplanetary Disks II: Correlations and LTE Models
• Lupus disks with faint CO isotopologues: low gas/dust or large carbon depletion?
• The Far-Ultraviolet Spectra of TW Hya. II. Models of H2 Fluorescence in a Disk
• Chemical evolution of turbulent protoplanetary disks and the Solar nebula
• Mass measurements in protoplanetary disks from hydrogen deuteride
• X-Shooter study of accretion in Chamaeleon I: II. A steeper increase of accretion with stellar mass for very low mass stars?
• How drifting and evaporating pebbles shape giant planets I: Heavy element content and atmospheric C/O
• Close Companions to Young Stars. I. A Large Spectroscopic Survey in Chamaeleon I and Taurus-Auriga
• X-Shooter spectroscopy of young stellar objects: II. Impact of chromospheric emission on accretion rate estimates
• Mapping accretion and its variability in the young open cluster NGC 2264: a study based on u-band photometry
• Molecular Hydrogen Emission from Protoplanetary Disks
• Organic Molecules and Water in the Inner Disks of T Tauri Stars
• Transport of CO in Protoplanetary Disks: Consequences of Pebble Formation, Settling, and Radial Drift
• Tracing Slow Winds from T Tauri Stars via Low Velocity Forbidden Line Emission
• Kinematic links and the co-evolution of MHD winds, jets, and inner disks from a high-resolution optical [OI] survey
• Fingerprints of giant planets in the photospheres of Herbig stars
• A New Look at T Tauri Star Forbidden Lines: MHD Driven Winds from the Inner Disk
• A Far-ultraviolet Atlas of Low-resolution Hubble Space Telescope Spectra of T Tauri Stars
• Classical T Tauri stars: magnetic fields, coronae, and star-disc interactions
• A Hubble Space Telescope Survey of H2 Emission in the Circumstellar Environments of Young Stars
• Refining the Census of the Upper Scorpius Association with Gaia
• Connection between jets, winds and accretion in T Tauri stars: the X-shooter view
• X-Shooter spectroscopy of young stellar objects in Lupus. Atmospheric parameters, membership and activity diagnostics
• A Hot Wind from the Classical T Tauri Stars: TW Hydrae and T Tauri
• The Origins of Fluorescent H2 Emission From T Tauri~Stars
• Hot Gas Lines in T Tauri Stars
• Star Formation at High Angular Resolution
• Accretion dynamics in the classical T Tauri star V2129 Oph
• The close classical T Tauri binary V4046 Sgr: Complex magnetic fields & distributed mass accretion
• NUV Excess in Slowly Accreting T Tauri Stars: Limits Imposed by Chromospheric Emission
• The depletion of water during dispersal of planet-forming disk regions
• The loopy UV line profiles of RU Lupi: accretion, outflows, and fluorescence
• Accurate determination of accretion and photospheric parameters in Young Stellar Objects: the case of two candidate old disks in the Orion Nebula Cluster
• PENELLOPE: the ESO data legacy program to complement the Hubble UV Legacy Library of Young Stars (ULLYSES) I. Survey presentation and accretion properties of Orion OB1 and $\sigma$-Orionis
• CO2 infrared emission as a diagnostic of planet-forming regions of disks
• Lyman alpha dominance of the Classical T Tauri FUV Radiation Field
• Evolution of X-ray and FUV Disk-Dispersing Radiation Fields
• Mapping the Circumstellar Environment of T Tauri with Fluorescent H_2 Emission
• How Hot is the Wind from TW Hydrae?
• Multi-epoch Ultraviolet HST Observations of Accreting Low-mass Stars
• CO/H2 Abundance Ratio ~ 10^{-4} in a Protoplanetary Disk
• The Far-Ultraviolet "Continuum" in Protoplanetary Disk Systems II: CO Fourth Positive Emission and Absorption
• HST spectra reveal accretion in MY Lupi
• Curved walls: Grain growth, settling, and composition patterns in T Tauri disk dust sublimation fronts
• Metal Depletion and Warm H2 in the Brown Dwarf 2M1207 Accretion Disk
• The Spatial Distribution of Fluorescent H${}_2$ Near T Tau
• Variable Accretion onto Protoplanet Host Star PDS 70
• GIARPS High-resolution Observations of T Tauri stars (GHOsT). II. Connecting atomic and molecular winds in protoplanetary disks
• The evolution of accretion in young stellar objects: Strong accretors at 3 - 10 Myr
• X-Shooter observations of low-mass stars in the Eta Chamaeleontis association
• Analysis of H2 Emission from Mira B in UV Spectra from HST
• Direct Measurement of Interstellar Extinction Toward Young Stars Using Atomic Hydrogen Lyman-$\alpha$ Absorption
• Photochemical-dynamical models of externally FUV irradiated protoplanetary discs
• The magnetic obliquity of accreting T Tauri stars
• The 1600 Angstrom Emission Bump in Protoplanetary Disks: A Spectral Signature of H${}_2$O Dissociation
• Magnetically Controlled Accretion on the Classical T Tauri Stars GQ Lupi and TW Hydrae
• A UV-to-NIR Study of Molecular Gas in the Dust Cavity Around RY Lupi
• FUV Irradiated Disk Atmospheres: Ly$\alpha$ and the Origin of Hot H${}_2$ Emission
• The STAR-MELT Python package for emission line analysis of YSOs
• The UV Perspective of Low-Mass Star Formation
• Herschel PACS observations of 4-10 Myr old Classical T Tauri stars in Orion OB1
• Statistics of wide pre-main sequence binaries in the Orion OB1 association
• Multiepoch, multiwavelength study of accretion onto T Tauri: X-ray versus optical and UV accretion tracers
• Probing Protoplanetary Disk Winds with C II Absorption
• Projected Rotational Velocities and Fundamental Properties of Low-Mass Pre-Main Sequence Stars in the Taurus-Auriga Star Forming Region
• Chemical enrichment of the planet forming region as probed by accretion
• UV Fluorescence Traces Gas and LyA Evolution in Protoplanetary Disks
• Investigating the origin of hot gas lines in Herbig Ae/Be Stars
• A CO-to-H${}_2$ ratio of $\approx 10^{-5}$ towards the Herbig Ae star HK Ori

Cited by in corpus (17)

• Three-dimensional Simulations of Magnetospheric Accretion in a T Tauri Star: Accretion and Wind Structures Just Around Star
• Towards a comprehensive view of accretion, inner disks, and extinction in classical T Tauri stars: an ODYSSEUS study of the Orion OB1b association
• New insights on the near-infrared veiling of young stars using CFHT/SPIRou data
• PENELLOPE III. The peculiar accretion variability of XX Cha and its impact on the observed spread of accretion rates
• The GRAVITY young stellar object survey -- XI. Probing the inner disk and magnetospheric accretion region of CI Tau
• Stable accretion and episodic outflows in the young transition disk system GM Aurigae
• PENELLOPE IV. A comparison between optical forbidden lines and ${\mathrm{H}}_2$ UV lines in the Orion OB1b and $\sigma$-Ori associations
• The Radial Distribution and Excitation of H2 around Young Stars in the HST-ULLYSES Survey
• Global 3-D Simulations of Magnetospheric Accretion: II. Hot Spots, Equilibrium Torque, Episodic Wind, and Midplane Outflow
• Empirical Determination of the Lithium 6707.856 Å Wavelength in Young Stars
• Lyman-alpha Scattering Models Trace Accretion and Outflow Kinematics in T Tauri Systems
• PENELLOPE VII: Revisiting empirical relations to measure accretion luminosity
• Correlation between the optical veiling and accretion properties: A case study of the classical T Tauri star DK Tau
• PENELLOPE V. The magnetospheric structure and the accretion variability of the classical T Tauri star HM Lup
• Evidence of a Disk-wind Origin for Fluorescent H${}_2$ in Classical T Tauri Stars
• Survey of Orion Disks with ALMA (SODA) III: Disks in wide binary systems in L1641 and L1647
• Updated Ultraviolet Fluorescence Efficiencies of CS: Evidence for Model Discrepancies in the Enhancement of NUV-Derived CS Abundances in Comets