Journal Article

Quantifying the importance of ram-pressure stripping in a galaxy group at 100 Mpc

E. Freeland, C. Sengupta and J. H. Croston

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 409, issue 4, pages 1518-1524
Published in print December 2010 | ISSN: 0035-8711
Published online December 2010 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2010.17379.x
Quantifying the importance of ram-pressure stripping in a galaxy group at 100 Mpc

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We examine two members of the NGC 4065 group of galaxies: a bent-double (aka wide angle tail) radio source and an H i-deficient spiral galaxy. Models of the X-ray-emitting intragroup gas and the bent-double radio source, NGC 4061, are used to probe the density of intergalactic gas in this group. H i observations reveal an asymmetric, truncated distribution of H i in spiral galaxy, UGC 07049, and the accompanying radio continuum emission reveals strong star formation. We examine the effectiveness of ram-pressure stripping as a gas-removal mechanism and find that it alone cannot account for the H i deficiency that is observed in UGC 07049 unless this galaxy has passed through the core of the group with a velocity of . A combination of tidal and ram-pressure stripping are necessary to produce the H i deficiency and asymmetry in this galaxy.

Keywords: galaxies: evolution; galaxies: groups: individual: NGC 4065; intergalactic medium; galaxies: jets

Journal Article.  4837 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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