A common origin for the circumnuclear disc and the nearby molecular clouds in the Galactic Centre-Reference-Cited by-同舟云学术

A common origin for the circumnuclear disc and the nearby molecular clouds in the Galactic Centre

Published:2019-08-05 Issue:4 Volume:488 Page:5802-5810
ISSN:0035-8711
Container-title:Monthly Notices of the Royal Astronomical Society
language:en
Short-container-title:

Author:

Ballone Alessandro¹²^ORCID,Mapelli Michela¹²³⁴^ORCID,Trani Alessandro Alberto⁵

Affiliation:

1. INAF - Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, I-35122 Padova, Italy

2. INFN - Padova, Via Marzolo 8, I–35131 Padova, Italy

3. Physics and Astronomy Department Galileo Galilei, University of Padova, Vicolo dell’Osservatorio 3, I–35122, Padova, Italy

4. Institute für Astro- und Teilchen Physik, Universität Innsbruck, Technikerstrasse 25/8, A-6020 Innsbruck, Austria

5. Graduate School of Science, Department of Astronomy, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-0033 Tokyo, Japan

Abstract

ABSTRACT The origin of the molecular clouds orbiting SgrA* is one of the most debated questions about our Galactic Centre. Here, we present the hydrodynamic simulation of a molecular cloud infalling towards SgrA*, performed with the adaptive-mesh-refinement code ramses. Through such simulation, we propose that the circumnuclear disc and the +20 km s−1 cloud originated from the same tidal disruption episode, occurred less than 1 Myr ago. We also show that recent star formation is to be expected in the +20 km s−1 cloud, as also suggested by recent observations.

Funder

MERAC Foundation

Japan Society for the Promotion of Science London

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/stz2147/29100720/stz2147.pdf

Reference93 articles.

1. Simulations of direct collisions of gas clouds with the central black hole

2. NUMERICAL SIMULATIONS OF THE POSSIBLE ORIGIN OF THE TWO SUB-PARSEC SCALE AND COUNTERROTATING STELLAR DISKS AROUND SgrA*