An HI View of Galaxy Conformity: HI-rich Environment around HI-excess Galaxies

Abstract

Using data taken as part of the Bluedisk project we study the connection between neutral hydrogen (HI) in the environment of spiral galaxies and that in the galaxies themselves. We measure the total HI mass present in the environment in a statistical way by studying the distribution of noise peaks in the HI data cubes obtained for 40 galaxies observed with WSRT. We find that galaxies whose HI mass fraction is high relative to standard scaling relations have an excess HI mass in the surrounding environment as well. Gas in the environment consists of gas clumps which are individually below the detection limit of our HI data. These clumps may be hosted by small satellite galaxies and\or be the high-density peaks of a more diffuse gas distribution in the inter-galactic medium. We interpret this result as an indication for a picture in which the HI-rich central galaxies accrete gas from an extended gas reservoir present in their environment.

15 pages, 13 figures. Accepted for publication in MNRAS

References in corpus (16)

• Cold gas accretion in galaxies
• The cold gaseous halo of NGC 891
• SoFiA: a flexible source finder for 3D spectral line data
• A calibration of the relation between the abundance of close galaxy pairs and the rate of galaxy mergers
• Seeding the formation of cold gaseous clouds in Milky Way size halos
• The growth of dark matter halos: evidence for significant smooth accretion
• An observational and theoretical view of the radial distribution of HI gas in galaxies
• The GALEX Arecibo SDSS survey: III. Evidence for the Inside-Out Formation of Galactic Disks
• Gas accretion from minor mergers in local spiral galaxies
• HIghMass -- High HI Mass, HI-rich Galaxies at z~0: Sample Definition, Optical and Halpha Imaging, and Star Formation Properties
• A low HI column density filament in NGC 2403: signature of interaction or accretion
• The Effects of radial inflow of gas and galactic fountains on the chemical evolution of M31
• Shrinking Galaxy Disks with Fountain-Driven Accretion from the Halo
• Resolved HI Imaging of a Population of Massive HI-Rich Galaxies with Suppressed Star Formation
• HI scaling relations of galaxies in the environment of HI-rich and control galaxies observed by the Bluedisk project
• The Outer Stellar Populations and Environments of Unusually HI-rich Galaxies

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