2012ApJ...748...48R

Query : 2012ApJ...748...48R

2012ApJ...748...48R - Astrophys. J., 748, 48 (2012/March-3)

Enhanced abundances in spiral galaxies of the Pegasus I cluster.

ROBERTSON P., SHIELDS G.A. and BLANC G.A.

Abstract (from CDS):

We study the influence of cluster environment on the chemical evolution of spiral galaxies in the Pegasus I cluster. We determine the gas-phase heavy element abundances of six galaxies in Pegasus derived from H II region spectra obtained from integral-field spectroscopy. These abundances are analyzed in the context of Virgo, whose spirals are known to show increasing interstellar metallicity as a function of H I deficiency. The galaxies in the Pegasus cluster, despite its lower density and velocity dispersion, also display gas loss due to interstellar-medium-intracluster-medium interaction, albeit to a lesser degree. Based on the abundances of three H I deficient spirals and two H I normal spirals, we observe a heavy element abundance offset of +0.13±0.07 dex for the H I deficient galaxies. This abundance differential is consistent with the differential observed in Virgo for galaxies with a similar H I deficiency, and we observe a correlation between log (O/H) and the H I deficiency parameter DEF for the two clusters analyzed together. Our results suggest that similar environmental mechanisms are driving the heavy element enhancement in both clusters.

Abstract Copyright: ∼

Journal keyword(s): galaxies: abundances - galaxies: clusters: individual: Pegasus I - galaxies: evolution - galaxies: spiral - H II regions

Simbad objects: 31

Full paper

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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 - 2026	#notes
1	M 74	G	01 36 41.7451236624	+15 47 01.107512304	10.52	10.00	9.46	9.16		~	1934	1
2	NGC 2903	AGN	09 32 10.111	+21 30 02.99	10.44	9.75	9.07	8.68		~	1204	3
3	NGC 3521	EmG	11 05 48.5680991376	-00 02 09.245076540	10.06	9.83	9.02	10.1	9.6	~	879	2
4	M 99	H2G	12 18 49.625	+14 24 59.36	10.45	10.44	9.87			~	1004	2
5	M 106	Sy2	12 18 57.620	+47 18 13.39		9.14	8.41	8.11		~	2512	4
6	M 61	Sy2	12 21 54.9282582888	+04 28 25.597367184	10.07	10.18	9.65			~	1084	1
7	M 100	AGN	12 22 54.9299993592	+15 49 20.296257960	10.04	10.05	9.35			~	1963	2
8	NAME Virgo Cluster	ClG	12 30 47.8	+12 23 07						~	7107	0
9	M 88	Sy2	12 31 59.1525062448	+14 25 13.148971824		14.33	13.18			~	843	1
10	NGC 4571	GiC	12 36 56.3722998960	+14 13 02.296534836		13.6				~	368	1
11	NGC 4651	LIN	12 43 42.6376070448	+16 23 36.002649300		11.30	10.92	10.42	9.84	~	537	0
12	NGC 4654	H2G	12 43 56.638	+13 07 34.86		11.8				~	600	1
13	NGC 4689	H2G	12 47 45.5568088416	+13 45 46.135889100		12.8				~	418	0
14	NGC 4713	GiG	12 49 57.8802780576	+05 18 40.933127196		12.3				~	320	1
15	M 94	SyG	12 50 53.0737971432	+41 07 12.900884628	9.15	8.96	8.24	7.78		~	1476	2
16	NGC 5033	Sy2	13 13 27.535	+36 35 37.14		11.01	12.03	9.73		~	909	1
17	M 63	LIN	13 15 49.2741893928	+42 01 45.728076108		9.34	8.59	8.35		~	1292	2
18	M 51	Sy2	13 29 52.698	+47 11 42.93		9.26	8.36	8.40		~	4565	4
19	M 101	GiP	14 03 12.583	+54 20 55.50		8.46	7.86	7.76		~	3138	2
20	ACO 2151	ClG	16 05 15.0	+17 44 55						~	594	3
21	NGC 6946	H2G	20 34 52.332	+60 09 13.24		10.5				~	2661	2
22	NGC 7331	LIN	22 37 04.0506038088	+34 24 56.800076508	10.65	10.35	9.48			~	1284	2
23	IC 1474	GiG	23 12 51.2764144128	+05 48 22.974948216		14.9				~	89	0
24	NGC 7518	GiP	23 13 12.7537321282	+06 19 18.411674658		14.5				~	102	0
25	NGC 7529	AG?	23 14 03.208	+08 59 33.11		14.6				~	44	0
26	NGC 7591	SyG	23 18 16.2727927344	+06 35 09.108933504		13.8				~	285	1
27	IC 5309	GiG	23 19 11.638	+08 06 33.58		15.0				~	132	0
28	NAME Peg Cluster	ClG	23 20 14.7	+08 12 23						~	131	0
29	NAME Peg I	ClG	23 21	+08.3						~	71	0
30	MCG+02-59-031	GiC	23 22 47.476	+11 46 22.55		16.0				~	40	0
31	NGC 7643	GiG	23 22 50.3808345024	+11 59 19.843143756		14.8				~	53	0

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