2009MNRAS.400.1208P

Query : 2009MNRAS.400.1208P

2009MNRAS.400.1208P - Mon. Not. R. Astron. Soc., 400, 1208-1224 (2009/December-2)

Star clusters in the interacting galaxy system Arp 284.

PETERSON B.W., STRUCK C., SMITH B.J. and HANCOCK M.

Abstract (from CDS):

We present results from a study of protoglobular cluster candidates in the interacting galaxy system Arp 284 (NGC 7714/5) using data from the Hubble Space Telescope (HST). Previous studies of the Antennae and M51 have suggested that the majority of young massive star clusters dissolve within 20 Myr due to mass loss. We use the evolutionary synthesis code starburst99 to estimate ages and extinctions for approximately 175 clusters visible with HST. We also use lower resolution Galaxy Evolution Explorer and ground-based Hα data to estimate the ages of the giant Hii regions in which these clusters are found, and compare the Spitzer colours of these Hii regions to those of star-forming regions in other interacting systems. The ages are also used to aid in the interpretation of Chandra X-ray data.

Clusters in the tidal tails of NGC 7714 are generally found to have ages less than 20 Myr, though observational limits make the significance of this result uncertain. Older clusters, though not numerous, have nearly the same spatial distribution within the imaged portion of NGC 7714 as young clusters. The cluster population in the bridge connecting the two galaxies appears to be older, but the data in this part of the system are too limited to draw firm conclusions. The ages of the giant Hii regions in NGC 7714 are generally older than those of their constituent clusters, possibly indicating that the young clusters we detect are surrounded by their dispersed predecessors.

Journal keyword(s): galaxies: individual (NGC 7714, NGC 7715) - galaxies: interactions - galaxies: star clusters

Nomenclature: Tables 2-3: [PSS2009] NNN (Nos 1-158), [PSS2009] nNN (Nos n01-n16). Tables 4-6: [SSN2005] A (Nos F-J) added. Fig. 1, Text: [PSS2009] feature N (Nos 1-6).

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 26

Full paper

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Number of rows : 26

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	NAME Magellanic Clouds	GrG	03 00	-71.0						~	7988	0
2	NGC 1275	Bla	03 19 48.1599902040	+41 30 42.108850836		13.10	12.48	11.09		~	4243	3
3	NGC 2207	AG?	06 16 22.0336889136	-21 22 21.759218400		11.48	10.65	10.21	11.9	~	301	4
4	IC 2163	AG?	06 16 27.9671433048	-21 22 33.133211832		12.55		11.28		~	172	2
5	NGC 2536	GiG	08 11 15.9239979960	+25 10 45.549680232		14.8	13.93			~	96	0
6	NGC 2854	GiG	09 24 03.15673	+49 12 15.6710		13.82				~	109	2
7	APG 285	GrG	09 24.1	+49 13						~	55	0
8	NGC 2856	GiG	09 24 16.0155478176	+49 14 57.076425384		14.10				~	92	2
9	Z 155-31	Sy2	10 52 14.9479088736	+30 03 28.370430468		14.6				~	76	0
10	NGC 3445	GiP	10 54 35.5131399552	+56 59 26.919652956	12.61	12.90	12.55			~	139	1
11	APG 24	G	10 54 40.1	+56 59 11						~	80	0
12	NAME Antennae	IG	12 01 53.170	-18 52 37.92						~	1749	0
13	M 51	Sy2	13 29 52.698	+47 11 42.93		9.26	8.36	8.40		~	4565	4
14	NGC 5253	rG	13 39 55.990	-31 38 24.11	11.48	10.94	10.49	10.33	13.47	~	1421	4
15	NGC 6872	AG?	20 16 56.4025198800	-70 46 05.070595584		11.97	11.59	10.71	11.9	~	92	0
16	NGC 7252	AGN	22 20 44.7748209648	-24 40 41.909518200	12.26	12.46	12.06	11.57		~	720	1
17	NGC 7714	AGN	23 36 14.1257730600	+02 09 18.197422668		14.91	14.36			~	788	1
18	SN 1999dn	SN*	23 36 14.70	+02 09 08.8			16.0			SNIb	117	1
19	APG 284	PaG	23 36 19	+02 09.3		12.6				~	608	0
20	NGC 7715	GiP	23 36 21.768	+02 09 25.30		11.81	12.14			~	142	0
21	[SSN2005] E	HII	~	~						~	2	0
22	[SSN2005] B	HII	~	~						~	2	0
23	[SSN2005] C	HII	~	~						~	2	0
24	[SSN2005] D	HII	~	~						~	2	0
25	NAME Local Group	GrG	~	~						~	9325	0
26	[SSN2005] A	HII	~	~						~	2	0

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