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

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

2013A&A...550A..18N - Astronomy and Astrophysics, volume 550A, 18-18 (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

Full paper

View the references in ADS

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 - 2023	#notes
1	NGC 104	GlC	00 24 05.359	-72 04 53.20			4.09			~	3839	0
2	NAME Mayall II	GlC	00 32 46.5323801712	+39 34 40.504803060		14.564	13.807	13.208	12.684	~	388	1
3	M 31	G	00 42 44.330	+41 16 07.50	4.86	4.36	3.44			~	12376	1
4	NAME Sculptor Dwarf Galaxy	G	01 00 09.4	-33 42 32		9.79	8.6	8.81		~	1318	4
5	ESO 243-49	GiG	01 10 27.7550638752	-46 04 27.356310264	16.54	14.92		13.48		~	171	0
6	[FWB2009] HLX-1	ULX	01 10 28.30	-46 04 22.3			24.5	23.80		~	192	1
7	NAME Fornax H1	Cl*	02 37 02.1	-34 11 00			16.59			~	102	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				~	90	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				~	121	0
24	[GMD93] 5	AGN	02 39 49.0	-34 20 00		20.6	20.6			~	6	0
25	NAME Fornax Dwarf Spheroidal	G	02 39 59.3	-34 26 57		9.02	7.4			~	1709	1
26	NAME Fornax H4	GlC	02 40 07.697	-34 32 10.59		15.18	13.91	14.08		~	107	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	QSO J0240-3437	QSO	02 40 19.0142731104	-34 37 19.782630192		16.61	15.5	15.73		~	10	0
30	[GMD93] 8	X	02 40 34	-34 27.2						~	2	0
31	QSO J0240-3438	QSO	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				~	97	0
35	NAME Carina dSph	G	06 41 36.7	-50 57 58		22.14	11.0	19.47		~	1105	0
36	ESO 495-21	bCG	08 36 15.190	-26 24 33.66	12.04	11.93	11.45	11.09	12.3	~	556	3
37	Z 64-73	G	10 08 28.12	+12 18 23.4		11.3	10.0			~	1182	1
38	NGC 5139	GlC	13 26 47.28	-47 28 46.1						~	3361	0
39	NGC 6388	GlC	17 36 17.461	-44 44 08.34		7.40				~	891	1
40	NAME SDG	G	18 55 03.1	-30 28 42		4.5	3.6			~	2118	2
41	M 15	GlC	21 29 58.33	+12 10 01.2						~	3102	0
42	NAME Local Group	GrG	~	~						~	8145	0

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