Elke Roediger
The ram pressure stripped radio tails of galaxies in the Coma cluster
Roediger, Elke; Yoshida, Michitoshi; Ge, Chong; Sarazin, Craig; Nulsen, Paul; Boselli, Alessandro; Gavazzi, Giuseppe; Fossati, Matteo; Jachym, Pavel; Sivanandam, Suresh; Combes, Francoise; Kenney, Jeffrey; Brinks, Elias; Bravo-Alfaro, Hector; Yagi, Masafumi; Sun, Ming; Chen, Hao
Authors
Michitoshi Yoshida
Chong Ge
Craig Sarazin
Paul Nulsen
Alessandro Boselli
Giuseppe Gavazzi
Matteo Fossati
Pavel Jachym
Suresh Sivanandam
Francoise Combes
Jeffrey Kenney
Elias Brinks
Hector Bravo-Alfaro
Masafumi Yagi
Ming Sun
Hao Chen
Abstract
Previous studies have revealed a population of galaxies in galaxy clusters with ram pressure stripped (RPS) tails of gas and embedded young stars. We observed 1.4 GHz continuum and H I emission with the Very Large Array in its B-configuration in two fields of the Coma cluster to study the radio properties of RPS galaxies. The best continuum sensitivities in the two fields are 6 and 8 µJy per 4 arcsec beam, respectively, which are 4 and 3 times deeper than those previously published. Radio continuum tails are found in 10 (8 are new) out of 20 RPS galaxies, unambiguously revealing the presence of relativistic electrons and magnetic fields in the stripped tails. Our results also hint that the tail has a steeper spectrum than the galaxy. The 1.4 GHz continuum in the tails is enhanced relative to their H α emission by a factor of ∼7 compared to the main bodies of the RPS galaxies. The 1.4 GHz continuum of the RPS galaxies is also enhanced relative to their infrared emission by a factor of ∼2 compared to star-forming galaxies. The enhancement is likely related to ram pressure and turbulence in the tail. We furthermore present H I detections in three RPS galaxies and upper limits for the other RPS galaxies. The cold gas in D100’s stripped tail is dominated by molecular gas, which is likely a consequence of the high ambient pressure. No evidence of radio emission associated with ultra-diffuse galaxies is found in our data.
Citation
Roediger, E., Yoshida, M., Ge, C., Sarazin, C., Nulsen, P., Boselli, A., …Chen, H. (2020). The ram pressure stripped radio tails of galaxies in the Coma cluster. Monthly Notices of the Royal Astronomical Society, 496(4), 4654-4673. https://doi.org/10.1093/mnras/staa1868
Journal Article Type | Article |
---|---|
Acceptance Date | Jun 21, 2020 |
Online Publication Date | Jul 2, 2020 |
Publication Date | 2020-08 |
Deposit Date | Oct 27, 2020 |
Publicly Available Date | Oct 27, 2020 |
Journal | Monthly Notices of the Royal Astronomical Society |
Print ISSN | 0035-8711 |
Electronic ISSN | 1365-2966 |
Publisher | Royal Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 496 |
Issue | 4 |
Pages | 4654-4673 |
DOI | https://doi.org/10.1093/mnras/staa1868 |
Public URL | https://durham-repository.worktribe.com/output/1288569 |
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Copyright Statement
This article has been accepted for publication in Monthly notices of the Royal Astronomical Society. ©: 2020 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
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