Title: flash -light on the ring : hydrodynamic simulations of expanding supernova shells near supermassive black holes

Abstract

The way supermassive black holes (SMBHs) in Galactic Centres (GCs) accumulate their mass is not completely determined. At large scales, it is governed by galactic encounters, mass inflows connected to spirals arms and bars, or due to expanding shells from supernova (SN) explosions in the central parts of galaxies. The investigation of the latter process requires an extensive set of gas dynamical simulations to explore the multidimensional parameter space needed to frame the phenomenon. The aims of this paper are to extend our investigation of the importance of SNe for inducing accretion on to an SMBH and carry out a comparison between the fully hydrodynamic code $$\scriptsize{\mathrm{FLASH}}$$ and the much less computationally intensive code $$\scriptsize{\mathrm{RING}}$$, which uses the thin shell approximation. We simulate 3D expanding shells in a gravitational potential similar to that of the GC with a variety of homogeneous and turbulent environments. In homogeneous media, we find convincing agreement between $$\scriptsize{\mathrm{FLASH}}$$ and $$\scriptsize{\mathrm{RING}}$$ in the shapes of shells and their equivalent radii throughout their whole evolution until they become subsonic. In highly inhomogeneous, turbulent media, there is also a good agreement of shapes and sizes of shells, and of the times of their first contact with the central 1-pc sphere, where we assume that they join the accretion flow. The comparison supports the proposition that an SN occurring at a galactocentric distance of 5 pc typically drives 1–3 M_⊙ into the central 1 pc around the GC.

Authors:

Barna, B. ;

• Search DOE PAGES for author "Barna, B."
• Search DOE PAGES for ORCID "0000-0003-4769-4794"

Palouš, J.; Ehlerová, S.; Wünsch, R. ;

• Search DOE PAGES for author "Wünsch, R."
• Search DOE PAGES for ORCID "0000-0003-1848-8967"

Morris, M. R.; Vermot, P.

Publication Date:

Fri Dec 24 00:00:00 EST 2021

Research Org.:

Pacific Northwest National Laboratory (PNNL), Richland, WA (United States). Environmental Molecular Sciences Laboratory (EMSL)

Sponsoring Org.:

USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR); Czech Science Foundation; Hungarian NKFIH/OTKA

OSTI Identifier:

1841638

Alternate Identifier(s):

OSTI ID: 1982580

Grant/Contract Number:  

AC05-76RL01830; 19-15480S; FK-134432

Resource Type:

Published Article

Journal Name:

Monthly Notices of the Royal Astronomical Society

Additional Journal Information:

Journal Name: Monthly Notices of the Royal Astronomical Society Journal Volume: 510 Journal Issue: 4; Journal ID: ISSN 0035-8711

Publisher:

Oxford University Press

Country of Publication:

United Kingdom

Language:

English

Subject:

79 ASTRONOMY AND ASTROPHYSICS; astronomy; astrophysics; ISM; supernova remnants; galaxy; centre; transients; supernovae; evolution