The Origin of Neutral Hydrogen Clouds in Nearby Galaxy Groups: Exploring the Range Of Galaxy Interactions

Abstract

We combine high resolution N-body simulations with deep observations of neutral hydrogen (HI) in nearby galaxy groups in order to explore two well-known theories of HI cloud formation: HI stripping by galaxy interactions and dark matter minihalos with embedded HI gas. This paper presents new data from three galaxy groups, Canes Venatici I, NGC 672, and NGC 45, and assembles data from our previous galaxy group campaign to generate a rich HI cloud archive to compare to our simulated data. We find no HI clouds in the Canes Venatici I, NGC 672, or NGC 45 galaxy groups. We conclude that HI clouds in our detection space are most likely to be generated through recent, strong galaxy interactions. We find no evidence of HI clouds associated with dark matter halos above M_HI = 10^6 M_Sun, within +/- 700 km/s of galaxies, and within 50 kpc projected distance of galaxies.

35 pages, 10 figures, AJ accepted

References in corpus (21)

• The Kinematics of the Ultra-Faint Milky Way Satellites: Solving the Missing Satellite Problem
• Cold gas accretion in galaxies
• The effect of galaxy mass ratio on merger--driven starbursts
• An H-alpha Imaging Survey of Galaxies in the Local 11 Mpc Volume
• The Structures of Distant Galaxies I: Galaxy Structures and the Merger Rate to z~3 in the Hubble Ultra-Deep Field
• Constraints on the Dark Matter Particle Mass from the Number of Milky Way Satellites
• Seeding the formation of cold gaseous clouds in Milky Way size halos
• Distances to Galactic high-velocity clouds. Complex C
• Smith's Cloud: A High-velocity Cloud Colliding with the Milky Way
• Neutral Hydrogen Clouds in the M81/M82 Group
• The H alpha Galaxy Survey. VIII. Close companions and interactions, and the definition of starbursts
• Groups of galaxies in the SDSS Data Release 5. A group-finder and a catalogue
• HI clouds in the proximity of M33
• Relics of structure formation: extra-planar gas and high-velocity clouds around the Andromeda Galaxy
• Prevalence of Tidal Interactions among Local Seyfert Galaxies
• Canes Venatici I cloud of galaxies seen in the H-alpha line
• Anomalous HI in NGC 2997
• Detection of ${}^{13}C$ Isotopic Species of $H{C}_{7}N$
• The NGC 672 and NGC 784 Galaxy Groups: Evidence for Galaxy Formation and Growth Along a Nearby Dark Matter Filament
• Physical properties of two compact high-velocity clouds possibly associated with the Leading Arm of the Magellanic System
• HI Clouds in the M81 Filament as Dark Matter Minihalos--A Phase-Space Mismatch

Cited by in corpus (10)

• Mining Circumgalactic Baryons in the Low-Redshift Universe
• A Catalog of Ultra-compact High Velocity Clouds from the ALFALFA Survey: Local Group Galaxy Candidates?
• The HI environment of the M101 group
• Ultra-strong MgII Absorbers as a Signature of Cool Intragroup Gas
• The Neutral Hydrogen Bridge between M31 and M33
• Distance Determinations to SHIELD Galaxies from HST Imaging
• The last 5 Gyr of Galactic chemical evolution based on H II region abundances derived from a temperature independent method
• The HI Chronicles of LITTLE THINGS BCDS III: Gas Clouds in and around Mrk 178, VII Zw 403, AND NGC 3738
• WALLABY pre-pilot survey: Two dark clouds in the vicinity of NGC 1395
• Is GBT 1355+5439 a dark galaxy?