Old and new major mergers in the SOSIMPLE galaxy, NGC 7135-Reference-Cited by-同舟云学术

Old and new major mergers in the SOSIMPLE galaxy, NGC 7135

Published:2021-01-21 Issue:2 Volume:502 Page:2296-2307
ISSN:0035-8711
Container-title:Monthly Notices of the Royal Astronomical Society
language:en
Short-container-title:

Author:

Davison Thomas A¹²^ORCID,Kuntschner Harald¹,Husemann Bernd³^ORCID,Norris Mark A²^ORCID,Dalcanton Julianne J⁴,De Rosa Alessandra⁵,Duc Pierre-Alain⁶,Bianchi Stefano⁷^ORCID,Capelo Pedro R⁸^ORCID,Vignali Cristian⁹¹⁰^ORCID

Affiliation:

1. European Southern Observatory, Karl-Schwarzschild-Strasse 2, D-87548 Garching bei Muenchen, Germany

2. Jeremiah Horrocks Institute, University of Central Lancashire, Preston PR1 2HE, UK

3. Max-Planck-Institut für Astronomie, K”onigstuhl 17, D-69117 Heidelberg, Germany

4. Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195, USA

5. INAF – Istituto di Astrofisica e Planetologie Spaziali, Via Fosso del Cavaliere, I-00133 Rome, Italy

6. Université de Strasbourg, CNRS, Observatoire astronomique de Strasbourg (ObAS), UMR 7550, F-67000 Strasbourg, France

7. Dipartimento di Matematica e Fisica, Università degli Studi Roma Tre, via della Vasca Navale 84, I-00146 Roma, Italy

8. Center for Theoretical Astrophysics and Cosmology, Institute for Computational Science, University of Zurich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland

9. Dipartimento di Fisica e Astronomia, Alma Mater Studiorum, Università degli Studi di Bologna, Via Gobetti 93/2, I-40129 Bologna, Italy

10. INAF – Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, Via Gobetti 93/3, I-40129 Bologna, Italy

Abstract

ABSTRACT The simultaneous advancement of high resolution integral field unit spectroscopy and robust full-spectral fitting codes now make it possible to examine spatially resolved kinematic, chemical composition, and star-formation history from nearby galaxies. We take new MUSE data from the snapshot optical spectroscopic imaging of mergers and pairs for legacy Exploration (SOSIMPLE) survey to examine NGC 7135. With counter-rotation of gas, disrupted kinematics and asymmetric chemical distribution, NGC 7135 is consistent with an ongoing merger. Though well hidden by the current merger, we are able to distinguish stars originating from an older merger, occurring 6–10 Gyr ago. We further find a gradient in ex-situ material with galactocentric radius, with the accreted fraction rising from 0 per cent in the galaxy centre, to ∼7 per cent within 0.6 effective radii.

Funder

European Southern Observatory

Deutsche Forschungsgemeinschaft

Deutsches Zentrum für Luft- und Raumfahrt

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/stab162/35931258/stab162.pdf

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