Evidence for a Rotational Component in the Circumgalactic Medium of Nearby Galaxies

Abstract

We present results of a study comparing the relative velocity of $\mathrm{Ly}\alpha$ absorbers to the rotation velocity of nearby galaxy disks in the local universe ($z\le 0.03$). We have obtained rotation curves via long-slit spectroscopy of eight galaxies with the Southern African Large Telescope, and combine this dataset with an additional 16 galaxies with data from the literature. Each galaxy appears within $3R_{\mathrm{vir}}$ of a QSO sightline with archival Cosmic Origin Spectrograph (COS) spectra. We study the velocity orientation of absorbers with respect to nearby galaxy's rotation, and compare with results from both the Steidel et al. (2002) monolithic halo model and a new cylindrical Navarro-Frenk-White galaxy halo model to interpret these data in the context of probing 3D galaxy halos via 1D QSO absorption-line spectroscopy. Relative to these models we find that up to $59\pm 5\%$ of $\mathrm{Ly}\alpha$ absorbers have velocities consistent with co-rotation. We find the $\mathrm{Ly}\alpha$ co-rotation fraction to decrease with galaxy luminosity ($L^{\ast }$) and impact parameter in a model-independent fashion. We report that both anti-rotating absorbers and those found near luminous galaxies ($L\gtrsim 0.5L^{\ast }$) mostly have low Doppler $b$-parameters ($b\lesssim 50$ km ${\mathrm{s}}^{-1}$). Absorbers consistent with co-rotation show a wide range of Doppler $b$-parameters. Finally, we find a strong anticorrelation between co-rotation fraction and galaxy inclination, which is at odds with recent metal-line kinematic studies and suggests the kinematic and geometric distribution of the circumgalactic medium is complex and multiphase.

arXiv comment27 pages, 17 figures, accepted to ApJ

References in corpus (64)

• A Universal Density Profile from Hierarchical Clustering
• The Structure of Cold Dark Matter Halos
• How Do Galaxies Get Their Gas?
• Galaxy Bimodality due to Cold Flows and Shock Heating
• Cold streams in early massive hot haloes as the main mode of galaxy formation
• Virial shocks in galactic haloes?
• The 6dF Galaxy Survey: Final Redshift Release (DR3) and Southern Large-Scale Structures
• High-Resolution Rotation Curves and Galaxy Mass Models from THINGS
• Galaxies in a simulated $\Lambda$CDM Universe I: cold mode and hot cores
• The Third Data Release of the Sloan Digital Sky Survey
• The 1000 Brightest HIPASS Galaxies: HI Properties
• The Cosmic Origins Spectrograph
• The Updated Zwicky Catalog (UZC)
• The Role of Cold Flows in the Assembly of Galaxy Disks
• The Ursa Major Cluster of Galaxies. IV ; HI synthesis observations
• Bimodal gas accretion in the Horizon-MareNostrum galaxy formation simulation
• The rates and modes of gas accretion on to galaxies and their gaseous haloes
• Characterizing the Circumgalactic Medium of Nearby Galaxies with HST/COS and HST/STIS Absorption-Line Spectroscopy
• Signatures of Cool Gas Fueling a Star-Forming Galaxy at Redshift 2.3
• Hierarchical formation of bulgeless galaxies: Why outflows have low angular momentum
• The circumgalactic medium of massive galaxies at z~3: a test for stellar feedback, galactic outflows, and cold streams
• The rotation curves shapes of late-type dwarf galaxies
• The Kinematic Connection Between QSO-Absorbing Gas and Galaxies at Intermediate Redshift
• Gas kinematics, morphology, and angular momentum in the FIRE simulations
• First science with SALT: peering at the accreting polar caps of the eclipsing polar SDSS J015543.40+002807.2
• Rigging dark halos: why is hierarchical galaxy formation consistent with the inside-out build-up of thin discs?
• Orbiting Circum-galactic Gas as a Signature of Cosmological Accretion
• Seeding the formation of cold gaseous clouds in Milky Way size halos
• Angular Momentum Acquisition in Galaxy Halos
• Co-planar streams, pancakes, and angular-momentum exchange in high-z disc galaxies
• Halo Gas and Galaxy Disk Kinematics Derived from Observations and LCDM Simulations of MgII Absorption Selected Galaxies at Intermediate Redshift
• The Relationship Between Intergalactic HI/OVI and Nearby (z<0.017) Galaxies
• Quasars Probing Galaxies: I. Signatures of Gas Accretion at Redshift Approximately 0.2
• The Most Completely Sampled Rotation Curves for Galaxies
• Possible Signatures of a Cold-Flow Disk from MUSE using a z=1 galaxy--quasar pair towards SDSSJ1422-0001
• The Angular Momentum Distribution of Gas and Dark Matter in Galactic Halos
• The multiphase circumgalactic medium traced by low metal ions in EAGLE zoom simulations
• High Angular Momentum Halo Gas: a Feedback and Code-Independent Prediction of LCDM
• Kinematics of Circumgalactic Gas: Feeding Galaxies and Feedback
• Halo Gas and Galaxy Disk Kinematics of a Volume-Limited Sample of MgII Absorption-Selected Galaxies at z~0.1
• EVLA Observations of Galactic Supernova Remnants: Wide-field Continuum and Spectral-index Imaging
• Observing the End of Cold Flow Accretion using Halo Absorption Systems
• H-alpha Kinematics of the SINGS Nearby Galaxies Survey. II
• The Kinematic Composition of MgII Absorbers
• The Interstellar Medium and Star Formation in Edge-On Galaxies. II. NGC 4157, 4565, and 5907
• Angular momentum distribution of hot gas and implications for disk galaxy formation
• How to get cool in the heat: comparing analytic models of hot, cold, and cooling gas in haloes and galaxies with EAGLE
• Are cold flows detectable with metal absorption lines?
• The physical nature of the cosmic accretion of baryons and dark matter into halos and their galaxies
• How Gas Accretion Feeds Galactic Disks
• The Structure of the Circumgalactic Medium of Galaxies: Cool Accretion Inflow Around NGC 1097
• The HIX galaxy survey II: HI kinematics of HI eXtreme galaxies
• Galaxies Probing Galaxies at High Resolution: Co-Rotating Gas Associated with a Milky Way Analog at z=0.4
• Spectroscopy of Edge-on Spirals
• Cosmic Origins Spectrograph and FUSE Observations of T ~ 10^5 K Gas In A Nearby Galaxy Filament
• A Complete Redshift Survey to the Zwicky Catalog Limit in a 2-hour by 15-degree Region Around 3C 273
• The Relation Between Galaxy ISM and Circumgalactic OVI Gas Kinematics Derived from Observations and $\Lambda$CDM Simulations
• Absorption Line Study of Halo Gas in NGC 3067 Toward the Background Quasar 3C 232
• Atomic hydrogen in the spiral galaxy NGC 3631
• Probing Halos of Galaxies at Very Large Radii using Background QSOs
• Simulating Gas Inflow at the Disk-Halo Interface
• Gas Accretion in Star-Forming Galaxies
• A Direct Detection of Gas Accretion: The Lyman Limit System in 3C 232
• Probing Large Galaxy Halos at $z\sim 0$ with Automated $\mathrm{Ly}\alpha$-Absorption Matching

Cited by in corpus (9)

• Telltale signs of metal recycling in the circumgalactic medium of a $z\sim 0.77$ galaxy
• Morphological and Rotation Structures of Circumgalactic Mg II Gas in the EAGLE Simulation and the Dependence on Galaxy Properties
• The HI Column Density Distribution of the Galactic Disk and Halo
• The relationship between gas and galaxies at z<1 using the Q0107 quasar triplet
• Discovery of extremely low-metallicity circumgalactic gas at $z=0.5$ toward Q0454-220
• FEASTS Combined with Interferometry. III. The Low Column Density HI Around M51 and Possibility of Turbulent-mixing Gas Accretion
• The Circumgalactic H$\alpha$ Spectrograph (CH$\alpha$S) I. Design, Engineering, and Early Commissioning
• Modelling gas around galaxy pairs and groups using the Q0107 quasar triplet
• Mainly on the Plane: Observing the Extended, Ionized Disks of Milky Way Analogs in IllustrisTNG