2019ApJ...874...77L


Query : 2019ApJ...874...77L

2019ApJ...874...77L - Astrophys. J., 874, 77-77 (2019/March-3)

Sub-Eddington supermassive black hole activity in Fornax early-type galaxies.

LEE N., GALLO E., HODGES-KLUCK E., COTE P., FERRARESE L., MILLER B., BALDASSARE V., PLOTKIN R. and TREU T.

Abstract (from CDS):

We characterize the incidence and intensity of low-level supermassive black hole activity within the Fornax cluster, through X-ray observations of the nuclei of 29 quiescent early-type galaxies. Using the Chandra X-ray Telescope, we target 17 galaxies from the Hubble Space Telescope Fornax Cluster Survey, down to a uniform (3σ) limiting X-ray luminosity threshold of 5 * 1038 erg s–1, which we combine with deeper, archival observations for an additional 12 galaxies. A nuclear X-ray point source is detected in 11 out of 29 targets. After accounting for the low-mass X-ray binary contamination to the nuclear X-ray signal, the X-ray active fraction is measured at 26.6% ± 9.6%. The results from this analysis are compared to similar investigations targeting quiescent early types in the Virgo cluster, as well as the field. After correcting for the different mass distributions, the measured Fornax active fraction is less than the field fraction, at more than 3σ, confirming that the funneling of gas to the nuclear regions of cluster members is inhibited compared to those galaxies in the field. At the same time, we find no statistically significant difference between Fornax and Virgo galaxies, with only marginal evidence for a lower active fraction in Fornax (1σ); if real, owing to Fornax's higher galaxy number density, this could indicate that galaxy-galaxy interactions are more effective at gas removal than galaxy-gas effects.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: active - galaxies: clusters: general - galaxies: nuclei - X-rays: binaries

Simbad objects: 31

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Number of rows : 31
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NGC 1316 GiP 03 22 41.789 -37 12 29.52 9.81 9.15 8.53 7.66   ~ 1295 1
2 IC 1919 GiG 03 26 02.2132576776 -32 53 40.323783768   13.78   12.60   ~ 75 0
3 NGC 1336 GiG 03 26 32.1845365512 -35 42 48.662672184   13.12   11.95   ~ 119 0
4 ESO 358-6 GiG 03 27 18.0282957096 -34 31 35.315736492   14.15   12.95   ~ 86 0
5 NGC 1339 GiG 03 28 06.5493649512 -32 17 09.840527844   12.63   11.18   ~ 156 0
6 NGC 1340 GiG 03 28 19.6251763296 -31 04 05.435465520   11.20 10.32 9.70   ~ 204 1
7 NGC 1351 GiG 03 30 34.9598617824 -34 51 14.242996620   12.30   10.85   ~ 167 0
8 NGC 1373 GiP 03 34 59.1993515280 -35 10 15.879086760 14.44 14.03 13.26     ~ 114 1
9 NGC 1374 GiP 03 35 16.5885737352 -35 13 34.563417168 12.46 11.97 11.08 10.59   ~ 270 1
10 NGC 1375 GiG 03 35 16.8025873104 -35 15 56.371399740 13.50 13.02 12.40 11.74   ~ 151 1
11 IC 1963 GiG 03 35 31.0692175536 -34 26 49.368859656   12.90   11.71   ~ 120 0
12 ESO 358-25 GiG 03 35 33.134 -32 27 53.55   13.90       ~ 78 0
13 NGC 1380 GiP 03 36 27.590 -34 58 34.68 11.32 10.94 9.93 9.37   ~ 399 1
14 NGC 1381 GiP 03 36 31.6592184144 -35 17 42.739221912 12.90 12.47 11.50 11.02   ~ 230 1
15 ESO 358-33 GiG 03 36 47.5007323848 -34 44 22.739259552 13.63 13.36 12.41 12.00   ~ 126 1
16 MCG-06-09-008 GiP 03 36 54.3158470008 -35 22 28.948080864   14.81       ~ 76 2
17 NGC 1387 GiP 03 36 57.0337458600 -35 30 23.675934060 12.18 11.75 10.69 10.16   ~ 240 1
18 NGC 1382 GiP 03 37 08.9722655064 -35 11 41.995386996 13.19 13.79 12.92 12.31   ~ 111 1
19 NGC 1389 GiP 03 37 11.7427350576 -35 44 45.873195000 12.80 12.39 11.50 10.99   ~ 184 1
20 NGC 1396 GiG 03 38 06.5677454520 -35 26 23.637846372   14.80       ~ 87 1
21 NGC 1399 BiC 03 38 29.083 -35 27 02.67 11.05 9.74 9.59 8.12   ~ 1515 1
22 ACO S 373 ClG 03 38 30 -35 27.3           ~ 1699 0
23 NGC 1404 GiP 03 38 51.917 -35 35 39.81 11.53 10.69 10.00 9.03   ~ 714 1
24 NGC 1419 GiG 03 40 42.1036600944 -37 30 38.778564456   13.56   12.07   ~ 124 0
25 ESO 358-50 GiG 03 41 03.6078361560 -33 46 45.297655572   13.86   12.57   ~ 73 0
26 NGC 1427 GiG 03 42 19.4455150392 -35 23 33.169251120   11.89   10.44   ~ 263 0
27 NGC 1428 GiG 03 42 22.8 -35 09 15   13.77   12.49   ~ 98 0
28 ESO 358-59 GiG 03 45 03.5753235792 -35 58 21.372259872   14.08   12.85   ~ 107 0
29 NGC 1460 GiG 03 46 13.7196390576 -36 41 47.015207664   13.52   12.12   ~ 62 0
30 IC 2006 EmG 03 54 28.4628183240 -35 58 01.673622516   12.39   10.94 11.9 ~ 201 0
31 NAME Virgo Cluster ClG 12 26 32.1 +12 43 24           ~ 6289 0

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2022.08.15-15:51:32

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