Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/150789

Title

A dozen new galaxies caught in the act: gas stripping and extended emission line regions in the coma cluster

Author(s)

Yagi, Masafumi;  Yoshida, Michitoshi;  Komiyama, Yutaka;  Kashikawa, Nobunari;  Furusawa, Hisanori;  Okamura, Sadanori;  Graham, Alister W.;  Miller, Neal A.;  Carter, David;  Mobasher, Bahram;  Jogee, Shardha

Abstract

We present images of extended Hα clouds associated with 14 member galaxies in the Coma cluster obtained from deep narrowband imaging observations with the Suprime-Cam at the Subaru Telescope. The parent galaxies of the extended Hα clouds are distributed farther than 0.2 Mpc from the peak of the X-ray emission of the cluster. Most of the galaxies are bluer than g – r ≈ 0.5 and they account for 57% of the blue (g – r < 0.5) bright (r < 17.8 mag) galaxies in the central region of the Coma cluster. They reside near the red- and blueshifted edges of the radial velocity distribution of Coma cluster member galaxies. Our findings suggest that most of the parent galaxies were recently captured by the Coma cluster potential and are now infalling toward the cluster center with their disk gas being stripped off and producing the observed Hα clouds.

Publication type

Journal article

Research centre

Swinburne University of Technology. Faculty of Information and Communication Technologies. Centre for Astrophysics and Supercomputing

Source

Astronomical Journal, Vol. 140, no. 6 (Dec 2010), pp. 1814-1829

Publication year

2010

FOR Code(s)

0201 Astronomical and Space Sciences

Keyword(s)

Abell 1656;  Clusters;  Evolution;  Galaxies;  Individual;  Structure

Publisher

Institute of Physics Publishing

ISSN

0004-6256

Publisher URL

http://dx.doi.org/10.1088/0004-6256/140/6/1814

Copyright

Copyright © 2010. The American Astronomical Society. All rights reserved. The American Astronomical Society does not allow institutions to archive either the accepted manuscript or the published version of the article. However, you can find an earlier version of the full text here: http://arxiv.org/abs/1005.3874.

Peer reviewed