2006AJ....131.2913B

Query : 2006AJ....131.2913B

2006AJ....131.2913B - Astron. J., 131, 2913-2920 (2006/June-0)

Neutral hydrogen clouds near early-type dwarf galaxies of the Local Group.

BOUCHARD A., CARIGNAN C. and STAVELEY-SMITH L.

Abstract (from CDS):

Parkes neutral hydrogen 21 cm line (H I) observations of the surroundings of nine early-type Local Group dwarfs are presented. We detected numerous H I clouds in the general direction of those dwarfs, and these clouds are often offset from the optical center of the galaxies. Although all the observed dwarfs, except Antlia, occupy phase-space regions where the high-velocity cloud (HVC) density is well above average, the measured offsets are smaller than one would expect from a fully random cloud distribution. Possible association is detected for 11 of the 16 investigated clouds, while for two galaxies, Sextans and Leo I, no H I was detected. The galaxies in which H I clouds were found not to coincide with the optical yet have a significant probability of being associated are the Sculptor dwarf, Tucana, LGS 3, Cetus, and Fornax. If the clouds are indeed associated, these galaxies have H I masses of M_HI_=2x10⁵, 2x10⁶, 7x10⁵, 7x10⁵, and 1x10⁵ M_☉, respectively. However, neither ram pressure nor tidal stripping can easily explain the offsets. In some cases, large offsets are found where ram pressure should be the least effective.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Dwarf - Galaxies: ISM - ISM: Clouds - Galaxies: Local Group - Radio Lines: Galaxies - Radio Lines: ISM

CDS comments: In reflist, Young & Lo 1997, ApJ 476, 127 incorrect for 1997ApJ...490..710Y

Simbad objects: 33

Full paper

View the references in ADS

Number of rows : 33

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Sp type	#ref 1850 - 2026	#notes
1	MCG-03-01-015	G	00 01 57.9	-15 27 50		11.50	11.10	10.93	~	782	2
2	NAME Cetus Dwarf Galaxy	G	00 26 10.8	-11 03 14			13.2		~	257	0
3	ESO 294-10	AG?	00 26 33.37	-41 51 19.1		15.76	15.3	14.97	~	122	2
4	NAME Magellanic Stream	HVC	00 32	-30.0					~	1079	1
5	NAME Andromeda III	G	00 35 33.8	+36 29 52			14.4		~	309	0
6	NGC 185	Sy2	00 38 57.9400026024	+48 20 15.035874648		9.10	9.2		~	840	1
7	M 110	GiG	00 40 22.0572349992	+41 41 07.507220136		8.92	8.07		~	1370	1
8	NAME Andromeda I	G	00 45 39.8	+38 02 28		13.9	12.7		~	355	0
9	ESO 540-30	AG?	00 49 20.96	-18 04 31.5		16.45		15.33	~	92	1
10	NAME Scl Group	GrG	01 00 06	-33 44.2					~	526	0
11	NAME Sculptor Dwarf Galaxy	G	01 00 09.4	-33 42 32		9.79	8.6	8.81	~	1498	4
12	NAME Pisces I	G	01 03 55.0	+21 53 06		16.18	14.3		~	404	0
13	IC 1613	GiC	01 04 48.4071	+02 07 10.185		10.42	10.01	9.77	~	1316	2
14	NAME Andromeda V	G	01 10 17.1	+47 37 41			15.3		~	215	0
15	NAME Andromeda II	G	01 16 29.8	+33 25 09			11.7		~	402	0
16	NAME Phoenix Dwarf Galaxy	Sy1	01 51 06.3	-44 26 41		13.48	13.2	12.69	~	575	2
17	MCG-06-07-001	G	02 39 59.3	-34 26 57		9.02	7.4		~	1894	1
18	ESO 206-20A	G	06 41 36.7	-50 57 58		22.14	11.0	19.47	~	1190	0
19	NGC 3109	AG?	10 03 06.877	-26 09 34.46	11.10	10.42	10.04	9.91	~	825	2
20	NAME Antlia Dwarf Galaxy	G	10 04 03.9	-27 20 01	16.73	15.69	15.17	15.00	~	221	1
21	Z 64-73	G	10 08 28.12	+12 18 23.4		11.3	10.0		~	1284	1
22	NAME Sextans dSph	LSB	10 13 02.9	-01 36 53		12	10.4		~	921	0
23	Z 126-111	G	11 13 28.13	+22 09 10.1		12.9	12.0		~	899	0
24	Z 318-18	G	15 09 08.0	+67 13 21		13.60	10.6		~	1459	0
25	Z 300-12	G	17 20 14.335	+57 55 16.39		12.40	10.6		~	1428	1
26	NAME SDG	G	18 55 19.0	-30 32 43		4.5	3.6		~	2438	2
27	NAME Sgr dIG	G	19 29 59.0	-17 40 41		15.5	13.6		~	323	1
28	MCG-02-53-003	G	20 46 51.7	-12 50 54	15.75	15.18	14.83	14.46	~	470	1
29	NAME Tuc Galaxy	G	22 41 49.6	-64 25 10		15.7	15.2		~	324	0
30	NAME Pisces II	G	22 58 31.0	+05 57 09			16.3		~	283	0
31	NAME Andromeda VII	GiG	23 26 31.0	+50 40 33		13.6	11.8		~	222	1
32	Z 431-72	G	23 28 35.2	+14 44 35	13.85	13.16	12.52		~	499	1
33	NAME Local Group	GrG	~	~					~	9325	0

To bookmark this query, right click on this link: simbad:objects in 2006AJ....131.2913B and select 'bookmark this link' or equivalent in the popup menu