2020A&A...633A..73T


Query : 2020A&A...633A..73T

2020A&A...633A..73T - Astronomy and Astrophysics, volume 633A, 73-73 (2020/1-1)

Spectral index-mass accretion rate correlation and evaluation of black hole masses in AGNs 3C 454.3 and M 87.

TITARCHUK L., SEIFINA E., CHEKHTMAN A. and OCAMPO I.

Abstract (from CDS):

We present the discovery of correlations between the X-ray spectral (photon) index and mass accretion rate observed in active galactic nuclei (AGNs) 3C 454.3 and M 87. We analyzed spectral transition episodes observed in these AGNs using Chandra, Swift, Suzaku, BeppoSAX, ASCA and RXTE data. We applied a scaling technique for a black hole (BH) mass evaluation which uses a correlation between the photon index and normalization of the seed (disk) component which is proportional to a mass accretion rate. We developed an analytical model that shows that the photon index of the BH emergent spectrum undergoes an evolution from lower to higher values depending on disk mass accretion rate. To estimate a BH mass in 3C 454.3 we consider extra-galactic SMBHs NGC 4051 and NGC 7469 as well as Galactic BHs Cygnus X-1 and GRO J1550-564 as reference sources for which distances, inclination angles are known and the BH masses are already evaluated. For M 87 on the other hand, we provide the BH mass scaling using extra-galactic sources (IMBHs: ESO 243-49 HLX-1 and M 101 ULX-1) and Galactic sources (stellar mass BHs: XTE J1550-564, 4U 1630-472, GRS 1915+105 and H 1743-322) as reference sources. Application of the scaling technique for the photon index-mass accretion rate correlation provides estimates of the BH masses in 3C 454.3 and M 87 to be about 3.4x109 and 5.6x107 solar masses, respectively. We also compared our scaling BH mass estimates with a recent BH mass estimate of M87=6.5x109M made using the Event Horizon Telescope which gives an image at 1.3mm and is based on the angular size of the "BH event horizon". Our BH mass estimate in M 87 is at least two orders of magnitude lower than that made by the EHT team.

Abstract Copyright: © ESO 2020

Journal keyword(s): accretion, accretion disks - black hole physics - galaxies: active

Simbad objects: 15

goto Full paper

goto View the references in ADS

Number of rows : 15
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 [FWB2009] HLX-1 ULX 01 10 28.30 -46 04 22.3     24.5 23.80   ~ 163 1
2 NGC 4051 Sy1 12 03 09.6098828919 +44 31 52.693714606   11.08 12.92 9.94   ~ 2042 1
3 NAME Knot in M87 Jet PoG 12 30 49.355 +12 23 28.32           ~ 182 0
4 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6447 3
5 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 2631 2
6 [JRW2005b] 122 UX? 14 03 32.38 +54 21 03.0   21.13       ~ 102 0
7 V* V381 Nor HXB 15 50 58.6520652623 -56 28 35.309070422   17.95 16.6     K3III 1072 0
8 X Nor X-1 LXB 16 34 01.610 -47 23 34.80           ~ 443 0
9 V* V1033 Sco HXB 16 54 00.137 -39 50 44.90   15.20 14.2 16.14   F5IV 1759 1
10 NAME XTE J17464-3213 LXB 17 46 15.59637 -32 14 00.8600           ~ 638 0
11 Granat 1915+105 HXB 19 15 11.55576 +10 56 44.9052           ~ 2386 0
12 HD 226868 HXB 19 58 21.6758193269 +35 12 05.782512305 9.38 9.72 8.91 8.42   O9.7Iabpvar 4022 0
13 3C 454.0 QSO 22 51 34.7283285659 +18 48 40.085907101   18.52 18.4     ~ 215 2
14 3C 454.3 Bla 22 53 57.74798 +16 08 53.5611   16.57 16.10 15.22   ~ 2592 2
15 NGC 7469 Sy1 23 03 15.674 +08 52 25.28 12.60 13.00 12.34     ~ 1938 3

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2020A&A...633A..73T and select 'bookmark this link' or equivalent in the popup menu


2021.07.29-17:51:52

© Université de Strasbourg/CNRS

    • Contact