The ram pressure stripped radio tails of galaxies in the Coma cluster-Reference-Cited by-同舟云学术

The ram pressure stripped radio tails of galaxies in the Coma cluster

Published:2020-07-02 Issue:4 Volume:496 Page:4654-4673
ISSN:0035-8711
Container-title:Monthly Notices of the Royal Astronomical Society
language:en
Short-container-title:

Author:

Chen Hao¹²^ORCID,Sun Ming¹,Yagi Masafumi³⁴,Bravo-Alfaro Hector⁵,Brinks Elias⁶,Kenney Jeffrey⁷,Combes Francoise⁸,Sivanandam Suresh⁹¹⁰,Jachym Pavel¹¹,Fossati Matteo¹²¹³^ORCID,Gavazzi Giuseppe¹⁴,Boselli Alessandro¹⁵,Nulsen Paul¹⁶¹⁷,Sarazin Craig¹⁸,Ge Chong¹,Yoshida Michitoshi¹⁹²⁰^ORCID,Roediger Elke²¹

Affiliation:

1. Department of Physics & Astronomy, University of Alabama in Huntsville, 301 Sparkman Drive, Huntsville, AL 35899, USA

2. Department of Astronomy, University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa

3. Optical and Infrared Astronomy Division, National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588, Japan

4. Graduate School of Science and Engineering, Hosei University, 3-7-2, Kajinocho, Koganei, Tokyo 184-8584, Japan

5. Departamento de Astronomía, Universidad de Guanajuato, Apdo. Postal 144, Guanajuato 36000, Mexico

6. Centre for Astrophysics Research, University of Hertfordshire, College Lane, Hatfield AL10 9AB, UK

7. Astronomy Department, Yale University, P.O. Box 208101, New Haven, CT 06520-8101, USA

8. Observatoire de Paris, LERMA, College de France, CNRS, PSL Univ, Sorbonne University, UPMC, F-75014 Paris, France

9. Department of Astronomy and Astrophysics, University of Toronto, 50 St. George St, Toronto, ON M5S 3H4, Canada

10. Dunlap Institute for Astronomy and Astrophysics, University of Toronto, 50 St. George St, Toronto, ON M5S 3H4, Canada

11. Astronomical Institute, Academy of Sciences of the Czech Republic, Boční II 1401, CZ-141 31 Prague 4, Czech Republic

12. Dipartimento di Fisica G. Occhialini, Universitä degli Studi di Milano Bicocca, Piazza della Scienza 3, I-20126 Milano, Italy

13. Institute for Computational Cosmology and Center for Extragalactic Astronomy, Durham University, South Road, Durham DH1 3LE, UK

14. Università degli Studi di Milano-Bicocca, Piazza della Scienza 3, I-20126 Milano, Italy

15. Aix Marseille Univ, CNRS, CNES, LAM, UMR 7326, F-13388, Marseille, France

16. Harvard–Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA

17. ICRAR, University of Western Australia, 35 Stirling Hwy, Crawley, WA 6009, Australia

18. Department of Astronomy, University of Virginia, Charlottesville, VA 22904, USA

19. Subaru Telescope, National Astronomical Observatory of Japan, 650 North A’ohoku Place, Hilo, HI 96720, USA

20. Hiroshima Astrophysical Science Center, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, Japan

21. Milne Centre for Astrophysics, Department of Physics & Mathematics, University of Hull, Hull HU6 7RX, UK

Abstract

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.

Funder

National Science Foundation

National Aeronautics and Space Administration

Office of Experimental Program to Stimulate Competitive Research

National Research Foundation

H2020 European Research Council

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

Link

http://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/staa1868/33457163/staa1868.pdf