2013A&A...550A..18N

Query : 2013A&A...550A..18N

2013A&A...550A..18N - Astronomy and Astrophysics, volume 550A18-18 (2013/2-1)

An XMM-Newton search for X-ray sources in the Fornax dwarf galaxy.

NUCITA A.A., MANNI L., DE PAOLIS F., VETRUGNO D. and INGROSSO G.

Abstract (from CDS):

We report the results of a deep archive XMM-Newton observation of the Fornax spheroidal galaxy that we analyzed with the aim of fully characterizing the X-ray source population (in most of the cases likely to be background active galactic nuclei) detected towards the target. A cross correlation with the available databases allowed us to find a source that may be associated with a variable star belonging to the galaxy. We also searched for X-ray sources in the vicinity of the Fornax globular clusters GC 3 and GC 4 and found two sources probably associated with the respective clusters. The deep X-ray observation was also suitable for the search of the intermediate-mass black hole (of mass ≃104M☉) expected to be hosted in the center of the galaxy. In the case of Fornax, this search is extremely difficult since the galaxy centroid of gravity is poorly constrained because of the large asymmetry observed in the optical surface brightness. Since we cannot firmly establish the existence of an X-ray counterpart of the putative black hole, we put constraints only on the accretion parameters. In particular, we found that the corresponding upper limit on the accretion efficiency, with respect to the Eddington luminosity, is as low as a few 10–5.

Abstract Copyright: ∼

Journal keyword(s): X-rays: individual: Fornax dSph - black hole physics

VizieR on-line data: <Available at CDS (J/A+A/550/A18): table1.dat table2.dat table3.dat>

Nomenclature: Table 1: [NMD2013] NNN (Nos 1-107).

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 42

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Number of rows : 42
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 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
2 NAME Mayall II GlC 00 32 46.5323801712 +39 34 40.504803060   14.564 13.807 13.208 12.684 ~ 400 1
3 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
4 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1498 4
5 ESO 243-49 GiC 01 10 27.7550638752 -46 04 27.356310264 16.54 14.92   13.48   ~ 187 0
6 [FWB2009] HLX-1 ULX 01 10 28.30 -46 04 22.3     24.5 23.80   ~ 230 1
7 NAME Fornax H1 Cl* 02 37 02.1 -34 11 00     16.59     ~ 107 0
8 [GMD93] 9 X 02 38 20 -34 30.3           ~ 2 0
9 NAME Fornax H2 GlC 02 38 44.24 -34 48 30.5   14.5       ~ 93 0
10 [GMD93] 14 X 02 38 48 -34 37.0           ~ 2 0
11 [VV2000] J023855.6-344045 QSO 02 38 55.5609912864 -34 40 44.778123444   20.1       ~ 8 0
12 [GMD93] 13 X 02 39 03 -34 36.8           ~ 2 0
13 [GMD93] 4 X 02 39 08 -34 18.6           ~ 2 0
14 [GMD93] 3 X 02 39 12 -34 18.3           ~ 2 0
15 [GMD93] 2 X 02 39 14 -34 15.1           ~ 2 0
16 [GMD93] 12 X 02 39 15 -34 35.5           ~ 2 0
17 [GMD93] 10 X 02 39 26 -34 32.8           ~ 2 0
18 [VV2000] J023932.9-342525 QSO 02 39 32.8846907544 -34 25 25.241672244   20.4       ~ 8 0
19 [GMD93] 6 X 02 39 34 -34 22.0           ~ 2 0
20 FBMC Fornax 17 C* 02 39 41.5350896664 -34 33 40.419060876   21.291 18.593 20.207 16.539 C 8 0
21 [PCH2008] 6-V38403 SX* 02 39 46.8 -34 16 41   23.35 23.10     ~ 2 0
22 [PCH2008] 6-V40765 SX* 02 39 47.5 -34 15 53   23.71 23.46     ~ 2 0
23 NAME Fornax H3 GlC 02 39 48.16 -34 15 28.6   13.59       ~ 131 0
24 [GMD93] 5 AGN 02 39 49.0 -34 20 00   20.6 20.6     ~ 6 0
25 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
26 NAME Fornax H4 GlC 02 40 07.697 -34 32 10.59   15.18 13.91 14.08   ~ 112 0
27 [GMD93] 11 X 02 40 08 -34 34.4           ~ 3 1
28 [GMD93] 1 X 02 40 15 -34 13.4           ~ 2 0
29 LEDA 88016 Sy2 02 40 19.0142731104 -34 37 19.782630192   16.61 15.5 15.73   ~ 12 0
30 [GMD93] 8 X 02 40 34 -34 27.2           ~ 2 0
31 QSO J0240-3438 SyG 02 40 38.8313444784 -34 38 57.571616796     20.2     ~ 7 0
32 [GMD93] 19 X 02 40 39 -34 48.2           ~ 2 0
33 1RXS J024208.4-344038 X 02 42 08 -34 40.1           ~ 2 0
34 NAME Fornax H5 GlC 02 42 21.111 -34 06 05.80   14.5       ~ 101 0
35 ESO 206-20A G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1190 0
36 MCG-04-21-005 AGN 08 36 15.190 -26 24 33.66 12.04 11.93 11.45 11.09 12.3 ~ 600 3
37 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
38 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3677 0
39 NGC 6388 GlC 17 36 17.461 -44 44 08.34           ~ 988 1
40 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
41 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3274 0
42 NAME Local Group GrG ~ ~           ~ 9325 0

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