HI scaling relations of galaxies in the environment of HI-rich and control galaxies observed by the Bluedisk project

Abstract

Our work is based on the "Bluedisk" project, a program to map the neutral gas in a sample of 25 HI-rich spirals and a similar number of control galaxies with the Westerbork Synthesis Radio Telescope (WSRT). In this paper we focus on the HI properties of the galaxies in the environment of our targeted galaxies. In total, we extract 65 galaxies from the WSRT cubes with stellar masses between $10^8{M}_{\odot }$ and $10^{11}{M}_{\odot }$. Most of these galaxies are located on the same HI mass-size relation and "HI-plane" as normal spiral galaxies. We find that companions around HI-rich galaxies tend to be HI-rich as well and to have larger R90,HI/R50,HI. This suggests a scenario of "HI conformity", similar to the colour conformity found by Weinmann et al. (2006): galaxies tend to adopt the HI properties of their neighbours. We visually inspect the outliers from the HI mass-size relation and galaxies which are offset from the HI plane and find that they show morphological and kinematical signatures of recent interactions with their environment. We speculate that these outliers have been disturbed by tidal or ram-pressure stripping processes, or in a few cases, by accretion events.

16 pages, 12 figures; accepted for publication in MNRAS

References in corpus (11)

• Galaxy Groups in the SDSS DR4: I. The Catalogue and Basic Properties
• Cold gas accretion in galaxies
• A Search for Extended Ultraviolet Disk (XUV-disk) Galaxies in the Local Universe
• Ram pressure stripping the hot gaseous halos of galaxies in groups and clusters
• The Current Status of Galaxy Formation
• Distances to Galactic high-velocity clouds. Complex C
• The GALEX Arecibo SDSS survey: III. Evidence for the Inside-Out Formation of Galactic Disks
• On the influence of ram-pressure stripping on interacting galaxies in clusters
• Ram pressure stripping of an isolated Local Group dwarf galaxy: evidence for an intra-group medium
• The Standing Wave Phenomenon in Radio Telescopes; Frequency Modulation of the WSRT Primary Beam
• Galactic Satellite Systems: Radial Distribution and Environment Dependence of Galaxy Morphology

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• HALOGAS: Strong Constraints on the Neutral Gas Reservoir and Accretion Rate in Nearby Spiral Galaxies
• The Dearth of Difference between Central and Satellite Galaxies III. Environmental Dependence of Mass-Size and Mass-Structure Relations
• Characteristic mass in galaxy quenching: environmental versus internal effects
• The Properties of Massive Star-forming galaxies with Outside-in Assembly Mode
• The conformity of HI galaxies in ALFALFA-SDSS sample
• The peculiar filamentary HI structure of NGC 6145