2008ApJ...682L..85K

Query : 2008ApJ...682L..85K

2008ApJ...682L..85K - Astrophys. J., 682, L85-L88 (2008/August-1)

A 500 kpc H I extension of the Virgo pair NGC 4532/DDO 137 detected by the Arecibo legacy fast ALFA (ALFALFA) survey.

KOOPMANN R.A., GIOVANELLI R., HAYNES M.P., KENT B.R., BALONEK T.J., BROSCH N., HIGDON J.L., SALZER J.J. and SPECTOR O.

Abstract (from CDS):

We report the discovery of a ∼500 kpc H I extension southwest of the Virgo Cluster H I-rich pair NGC 4532/DDO 137, detected as part of the Arecibo Legacy Fast ALFA (ALFALFA) Survey. The feature is the longest and most massive H I tail structure so far found in the Virgo Cluster and, at 1.8 Mpc from M87, the most distant from the main concentration of the intracluster medium. The structure is spatially and spectrally separated into two ridges and is defined by diffuse emission and discrete clumps of mass (2.5-6.8)x10⁷ M_☉. All emission is blueshifted with respect to the NGC 4532/DDO 137 pair emission. Including diffuse emission, the structure has a total mass of up to 7x10⁸ M_☉, equivalent to ∼10% of the system's H I mass. Optical R-band imaging finds no counterparts to a level of 26.5 mag/arcsec2. The characteristics of the structure appear most consistent with a tidal origin.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Clusters: General - Galaxies: Clusters: Individual: Name: Virgo - Galaxies: Evolution - Galaxies: Interactions - Galaxies: Spiral - Galaxies: Structure

Nomenclature: Table 1, Fig.1: [KGH2008] W Clump N=1, [KGH2008] N (Nos 1-8).

Status at CDS : Objects in title, abstract, text, figures, and all or part of small table(s) being processed in SIMBAD.

Simbad objects: 23

Full paper

View the references in ADS

Number of rows : 23

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	[KGH2007] 6	G	12 17 51	+14 46.5						~	49	0
2	M 99	H2G	12 18 49.625	+14 24 59.36	10.45	10.44	9.87			~	877	2
3	NGC 4388	Sy2	12 25 46.820	+12 39 43.45	11.91	11.76	11.02			~	1299	2
4	NAME Virgo Cluster	ClG	12 26 32.1	+12 43 24						~	6451	0
5	NAME Vir B Cluster	GrG	12 29.8	+08 00						~	130	0
6	M 49	Sy2	12 29 46.798	+08 00 01.48		13.21	12.17			~	2058	2
7	M 87	AGN	12 30 49.42338414	+12 23 28.0436859	10.16	9.59	8.63		7.49	~	6932	3
8	[KGH2008] 1	HI	12 32 18.6	+05 52 51						~	1	0
9	[KGH2008] 2	HI	12 32 39.8	+06 01 17						~	1	0
10	[KGH2008] 3	HI	12 33 05.3	+05 51 00						~	1	0
11	[KGH2008] 4	HI	12 33 05.7	+05 26 00						~	1	0
12	[KGH2008] 5	HI	12 33 13.4	+05 02 04						~	1	0
13	[KGH2008] 6	HI	12 33 31.2	+06 09 30						~	1	0
14	SDSS J123333.22+060259.1	G	12 33 33.224	+06 02 59.16						~	6	0
15	AGC 227904	G	12 33 36.9	+06 26 43						~	5	0
16	NGC 4532	GiP	12 34 19.329	+06 28 03.73		12.3				~	274	2
17	NAME NGC 4532-DDO 137 Pair Complex	PaG	12 34 20.2	+06 27 51						~	2	0
18	UGC 7739	GiP	12 34 44.934	+06 17 59.58		15.3				~	105	1
19	[KGH2008] 8	HI	12 35 20.2	+05 02 00						~	1	0
20	VCCA 109	EmG	12 35 24.4326065448	+05 02 53.834405892						~	13	1
21	ACO 3526	ClG	12 48 51.8	-41 18 21						~	1038	2
22	ACO 1656	ClG	12 59 48.7	+27 58 50						~	4652	2
23	NAME Centaurus A	Sy2	13 25 27.61521044	-43 01 08.8050291		8.18	6.84	6.66		~	4362	3

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