2011ApJ...734...33J

Query : 2011ApJ...734...33J

2011ApJ...734...33J - Astrophys. J., 734, 33 (2011/June-2)

Investigating the nuclear activity of barred spiral galaxies: the case of NGC 1672.

JENKINS L.P., BRANDT W.N., COLBERT E.J.M., KORIBALSKI B., KUNTZ K.D., LEVAN A.J., OJHA R., ROBERTS T.P., WARD M.J. and ZEZAS A.

Abstract (from CDS):

We have performed an X-ray study of the nearby barred spiral galaxy NGC 1672, primarily to ascertain the effect of the bar on its nuclear activity. We use both Chandra and XMM-Newton observations to investigate its X-ray properties, together with supporting high-resolution optical imaging data from the Hubble Space Telescope (HST), infrared imaging from the Spitzer Space Telescope, and Australia Telescope Compact Array ground-based radio data. We detect 28 X-ray sources within the D₂₅ area of the galaxy; many are spatially correlated with star formation in the bar and spiral arms, and two are identified as background galaxies in the HST images. Nine of the X-ray sources are ultraluminous X-ray sources, with the three brightest (L_X> 5x10³⁹ erg/s) located at the ends of the bar. With the spatial resolution of Chandra, we are able to show for the first time that NGC 1672 possesses a hard (Γ ∼ 1.5) nuclear X-ray source with a 2-10 keV luminosity of 4x10³⁸ erg/s. This is surrounded by an X-ray-bright circumnuclear star-forming ring, comprised of point sources and hot gas, which dominates the 2-10 keV emission in the central region of the galaxy. The spatially resolved multiwavelength photometry indicates that the nuclear source is a low-luminosity active galactic nucleus (LLAGN), but with star formation activity close to the central black hole. A high-resolution multiwavelength survey is required to fully assess the impact of both large-scale bars and smaller-scale phenomena such as nuclear bars, rings, and nuclear spirals on the fueling of LLAGN.

Abstract Copyright: ∼

Journal keyword(s): galaxies: evolution - galaxies: individual: NGC 1672 - galaxies: nuclei - galaxies: spiral

Nomenclature: Table 1: [JBC2011] NN (Nos 1-28).

Simbad objects: 56

Full paper

View the references in ADS

Number of rows : 56

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2024	#notes
1	M 31	AGN	00 42 44.330	+41 16 07.50	4.86	4.36	3.44			~	12651	1
2	M 33	GiG	01 33 50.8965749232	+30 39 36.630403128	6.17	6.27	5.72			~	5839	1
3	NGC 660	Sy2	01 43 02.350	+13 38 44.45		12.02	11.16			~	556	2
4	NGC 1023	AG?	02 40 24.0133575864	+39 03 47.663392896	10.91	10.35	9.35	7.83		~	660	2
5	M 77	Sy2	02 42 40.7091669408	-00 00 47.859690204	9.70	9.61	8.87	10.1	9.9	~	4603	2
6	NGC 1097	LIN	02 46 19.059	-30 16 29.68	10.46	9.97	9.48	8.72	9.8	~	1342	3
7	NGC 1365	Sy1	03 33 36.458	-36 08 26.37	10.48	10.08	9.63	8.79	9.7	~	1803	2
8	NGC 1386	Sy1	03 36 46.238	-35 59 57.39	12.42	12.16	11.23	10.76		~	520	1
9	PKS 0420-62	rG	04 20 56.04155	-62 23 38.8505						~	26	1
10	[JBC2011] 1	HXB	04 45 28.47	-59 14 33.4						~	3	0
11	[JBC2011] 3	HXB	04 45 29.84	-59 15 06.9						~	3	0
12	[JBC2011] 2	HXB	04 45 29.8854160920	-59 13 28.758043992						~	2	0
13	[JBC2011] 4	HXB	04 45 31.61	-59 14 54.6						~	3	0
14	[JBC2011] 5	HXB	04 45 33.97	-59 14 41.9						~	3	0
15	[JBC2011] 6	HXB	04 45 34.32	-59 12 55.7						~	3	0
16	[JBC2011] 7	HXB	04 45 35.08	-59 14 12.5						~	3	0
17	2MASS J04453671-5914277	HXB	04 45 36.7115486736	-59 14 28.028190912						~	2	0
18	[JBC2011] 9	HXB	04 45 37.00	-59 16 54.6						~	3	0
19	[JBC2011] 10	HXB	04 45 40.38	-59 14 37.5						~	2	0
20	[JBC2011] 11	HXB	04 45 40.95	-59 17 46.3						~	2	0
21	[JBC2011] 12	HXB	04 45 41.76	-59 14 55.0						~	2	0
22	[JBC2011] 13	HXB	04 45 42.15	-59 14 52.4						~	3	0
23	[JBC2011] 14	X	04 45 42.41	-59 14 44.6						~	1	0
24	[JBC2011] 15	X	04 45 42.50	-59 14 50.1						~	1	0
25	NGC 1672	SyG	04 45 42.552	-59 14 50.68	10.29	10.53	9.68	9.53	10.2	~	401	1
26	[JBC2011] 16	HXB	04 45 42.61	-59 14 47.1						~	2	0
27	[JBC2011] 17	HXB	04 45 42.63	-59 15 09.7						~	2	0
28	[JBC2011] 18	HXB	04 45 42.71	-59 14 55.1						~	2	0
29	[JBC2011] 19	HXB	04 45 44.53	-59 15 35.1						~	3	0
30	[JBC2011] 20	HXB	04 45 46.1306943216	-59 12 23.747549292						~	2	0
31	[JBC2011] 21	HXB	04 45 46.79	-59 14 18.7						~	2	0
32	[JBC2011] 22	HXB	04 45 49.06	-59 14 48.2						~	2	0
33	[JBC2011] 23	HXB	04 45 49.56	-59 12 48.8						~	2	0
34	[JBC2011] 24	HXB	04 45 51.00	-59 14 22.8						~	3	0
35	[JBC2011] 25	HXB	04 45 52.83	-59 14 56.1						~	3	0
36	[JBC2011] 26	HXB	04 45 53.32	-59 15 27.9						~	3	0
37	[JBC2011] 27	X	04 45 53.78	-59 14 28.5						~	1	0
38	[JBC2011] 28	HXB	04 45 54.30	-59 14 10.5						~	3	0
39	QSO B0522-611	QSO	05 22 34.42547703	-61 07 57.1337711		18.46	18.05	18.05		~	92	1
40	NGC 2787	LIN	09 19 18.6046606656	+69 12 11.630716128		12.92	11.79			~	354	0
41	M 82	AGN	09 55 52.430	+69 40 46.93	9.61	9.30	8.41			~	5861	6
42	NGC 3079	Sy2	10 01 57.8789863992	+55 40 47.449758324	11.57	11.54	10.86			~	1391	3
43	M 95	GiP	10 43 57.7313485800	+11 42 13.301191332	10.71	10.51	9.73	9.48		~	1122	2
44	NGC 3393	Sy2	10 48 23.4653152920	-25 09 43.487648784		13.10	13.95	11.67	12.2	~	424	1
45	M 61	Sy2	12 21 54.9282582888	+04 28 25.597367184	10.07	10.18	9.65			~	998	2
46	NGC 4314	LIN	12 22 32.0223000912	+29 53 43.814812200	11.72	11.43	10.58			~	479	1
47	SN 1979C	SN*	12 22 58.58	+15 47 52.7		11.6				SNIIL	585	1
48	M 94	SyG	12 50 53.0737971432	+41 07 12.900884628	9.15	8.96	8.24	7.78		~	1386	2
49	M 51	Sy2	13 29 52.698	+47 11 42.93		9.26	8.36	8.40		~	4330	4
50	IC 4553	SyG	15 34 57.22396	+23 30 11.6084		14.76	13.88			~	2961	4
51	NAME LHB	X	16 42.0	+02 19						~	347	0
52	ICRF J193925.0-634245	Sy2	19 39 25.0245304992	-63 42 45.640373400		18.87	18.37	17.64		~	1227	1
53	SN 1968D	SN*	20 34 58.40	+60 09 34.4		13.5	13.5			SNII	71	1
54	NGC 7212	Sy2	22 07 01.9870259424	+10 14 00.838175892		15.1				~	196	1
55	NGC 7771	GiG	23 51 24.880	+20 06 42.57	13.42	13.08	12.25			~	338	4
56	NAME Local Group	GrG	~	~						~	8393	0

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