2021NatAs...5..478M

Query : 2021NatAs...5..478M

2021NatAs...5..478M - Nature Astronomy, 5, 478-484 (2021)

Destruction of the central black hole gas reservoir through head-on galaxy collisions.

MIKI Y., MORI M. and KAWAGUCHI T.

Abstract (from CDS):

A massive black hole exists in almost every galaxy. Black holes occasionally radiate a vast amount of light by releasing gravitational energy of accreting gas with a cumulative active period of only a few 10 yr, the so-called duty cycle of the active galactic nuclei. Many galaxies today host a starving massive black hole. Although galaxy collisions have been thought to enhance nucleus activity, the origin of the duty cycle, especially the shutdown process, is still a critical issue. Here, we show that galaxy collisions are also capable of suppressing black hole fuelling, by using an analytic model and three-dimensional hydrodynamic simulations and by applying the well-determined parameter sets for the galactic collision in the Andromeda galaxy. Our models demonstrate that a central collision of galaxies can strip the torus-shaped gas surrounding the massive black hole, the putative fuelling source. The derived condition for switching off the black hole fuelling indicates that a notable fraction of currently bright nuclei can become inactive, which is reminiscent of the fading or dying active nucleus phenomena that are associated with galaxy merging events. Galaxy collisions may therefore be responsible for both switching off and turning on the nucleus activity, depending on the collision orbit (head-on or far-off-centre).

Abstract Copyright: ©

Journal keyword(s): Astrophysics - Astrophysics of Galaxies - Astrophysics - Cosmology and Nongalactic Astrophysics - Astrophysics - High Energy Astrophysical Phenomena

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 45

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Number of rows : 45
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
3 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1498 4
4 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 575 2
5 NAME Tri II G 02 13 17.40 +36 10 42.4           ~ 164 0
6 NAME Segue 2 G 02 19 16.0 +20 10 31     15.2     ~ 299 0
7 NAME Hydrus I G 02 29 33.4 -79 18 32           ~ 80 0
8 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
9 NAME Hor I G 02 55 31.7 -54 07 08           ~ 169 0
10 NAME Reticulum II G 03 35 42.1 -54 02 57           ~ 375 0
11 NAME Eridanus II G 03 44 21.1 -43 32 00           ~ 216 0
12 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
13 ESO 206-20A G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1190 0
14 NAME Carina II Dwarf Galaxy G 07 36 25.6 -57 59 57           ~ 86 0
15 NAME Car III Dwarf Galaxy G 07 38 31.2 -57 53 59           ~ 81 0
16 NAME UMa II Galaxy G 08 51 30.0 +63 07 48     13.3     ~ 410 0
17 NAME Segue 1 G 10 07 03.2 +16 04 25     15.3     ~ 517 1
18 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
19 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
20 NAME UMa I Galaxy G 10 34 52.80 +51 55 12.0     14.4     ~ 355 1
21 NAME Willman 1 G 10 49 21.0 +51 03 00     15.2     ~ 345 0
22 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
23 NAME Leo V LSB 11 31 09.60 +02 13 12.0     16.0     ~ 234 0
24 NAME Leo IV LSB 11 32 57.0 -00 32 00     15.1     ~ 419 1
25 NAME Crater II Dwarf Galaxy G 11 49 14 -18 24.8           ~ 176 0
26 NAME Hydra II G 12 21 42.1 -31 59 07           ~ 118 0
27 NAME Coma Dwarf Galaxy G 12 26 59.0 +23 54 15     14.1     ~ 482 1
28 NAME CVn II dSph G 12 57 09.6 +34 19 12     16.1     ~ 287 2
29 NAME CVn I dSph G 13 28 03.5 +33 33 21     13.1     ~ 352 1
30 NAME Bootes II G 13 58 00.0 +12 51 00     15.4     ~ 269 0
31 NAME Bootes Dwarf Spheroidal Galaxy G 14 00 00.0 +14 30 00     12.8     ~ 491 0
32 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 1331 1
33 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
34 NAME Draco II Gl? 15 52 47.6 +64 33 55           ~ 138 0
35 NAME Hercules Dwarf Galaxy G 16 31 02.0 +12 47 30     14.0     ~ 379 1
36 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
37 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 4970 3
38 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
39 NAME Aquarius 2 G 22 33 55.5 -09 19 39           ~ 66 0
40 NAME Tuc II G 22 51 55.1 -58 34 08           ~ 192 0
41 NAME Grus I G 22 56 42.4 -50 09 48           ~ 126 0
42 NAME Pisces II G 22 58 31.0 +05 57 09     16.3     ~ 283 0
43 NAME Tuc III G 23 56.6 -59 36           ~ 229 0
44 NAME Andromeda Stream St* ~ ~           ~ 77 1
45 NAME Gaia Enceladus-Sausage St* ~ ~           ~ 860 0

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