2009AJ....138.1037C


Query : 2009AJ....138.1037C

2009AJ....138.1037C - Astron. J., 138, 1037-1061 (2009/October-0)

Star formation in dwarf galaxies of the nearby Centaurus A Group.

COTE S., DRAGINDA A., SKILLMAN E.D. and MILLER B.W.

Abstract (from CDS):

We present Hα narrow-band imaging of 17 dwarf irregular (dI) galaxies in the nearby Centaurus A Group. Although all large galaxies of the group are or recently have been through a period of enhanced star formation, the dIs have normal star formation rates (SFRs) and do not contain a larger fraction of dwarf starbursts than other nearby groups such as the Sculptor Group or the Local Group. Most of the galaxies in the group now have fairly accurately known distances, which enables us to obtain relative distances between dIs and larger galaxies of the group. We find that the dI SFRs do not depend on local environment, and in particular they do not show any correlation with the distance of the dI to the nearest large galaxy of the group. There is a clear morphology-density relation in the Centaurus A Group, similar to the Sculptor Group and Local Group, in the sense that dwarf ellipticals (dEs)/dwarf spheroidals (dSphs) tend to be at small distances from the more massive galaxies of the group, while dIs are on average at larger distances. We find four transition dwarfs in the Group, dwarfs that show characteristics of both dE/dSphs and dIs, and which contain cold gas but no current star formation. Interestingly, the transition dwarfs have an average distance to the more massive galaxies, which is intermediate between those of the dEs/dSphs and dIs and which is quite large: 0.54±0.31 Mpc. This large distance poses some difficulty for the most popular scenarios proposed for transforming a dI into a dE/dSph (ram-pressure with tidal stripping or galaxy harassment). If the observed transition dwarfs are indeed missing links between dIs and dE/dSphs, their relative isolation makes it less likely to have been produced by these mechanisms. An inhomogeneous intergalactic medium containing higher density clumps would be able to ram-pressure strip the dIs at larger distances from the more massive galaxies of the group.

Abstract Copyright:

Journal keyword(s): galaxies: dwarf - galaxies: evolution - galaxies: irregular - H II regions

VizieR on-line data: <Available at CDS (J/AJ/138/1037): table1.dat table2.dat table3.dat>

Nomenclature: Table 3: [CDS2009] ESO NNN-GNNN NN N=15+5+5+8+29+5+10+40+34, [CDS2009] NGC NNNN NN N=6+17+63, [CDS2009] DDO 161 NN (Nos 1-34), [CDS2009] Centaurus 6 N (Nos 1-4), [CDS2009] UGCA 365 N (No. 1), [CDS2009] IC 4316 N (Nos 1-5), [CDS2009] UKS 1424-460 N (No. 1).

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 58

goto Full paper

goto View the references in ADS

Number of rows : 58
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME Sculptor dIG G 00 08 13.4 -34 34 41   15.54   14.99   ~ 137 3
2 IC 10 G 00 20 23.16 +59 17 34.7   13.6 9.5     ~ 1036 0
3 ESO 294-10 G 00 26 33.4 -41 51 22   15.76 15.3 14.97   ~ 98 2
4 NGC 185 Sy2 00 38 57.970 +48 20 14.56   9.10 9.2     ~ 745 1
5 M 110 GiG 00 40 22.0544552438 +41 41 07.496294862   8.92 8.07     ~ 1238 1
6 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11377 1
7 ESO 540-31 G 00 49 49.3 -21 00 58 16.11 15.64 15.36 14.8 15.5 ~ 120 1
8 ESO 540-32 LSB 00 50 24.5 -19 54 23 17.44 16.54 16.01 15.70   ~ 66 1
9 NAME Scl Group GrG 01 00 06 -33 44.2           ~ 472 0
10 NAME Pisces I G 01 03 56.6 +21 53 41   16.18 14.3     ~ 368 0
11 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 482 2
12 M 42 HII 05 35 17.3 -05 23 28           ~ 3818 0
13 2MASX J08372908-5647250 G 08 37 29.1240834723 -56 47 25.442058919   17.0       ~ 4 0
14 NAME Leo T G 09 34 53.4 +17 03 05     15.1     ~ 325 0
15 NAME Antlia Dwarf Galaxy G 10 04 03.9 -27 20 01 16.73 15.69 15.17 15.00   ~ 200 1
16 UGC 5764 IG 10 36 43.1427419501 +31 32 50.184648977   15.6   15.04   ~ 97 0
17 ESO 321-14 G 12 13 49.6 -38 13 52 16.32 15.70 15.35 15.20 15.2 ~ 77 0
18 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6451 3
19 ESO 381-18 G 12 44 42.5 -35 58 01   15.79   14.84 15.1 ~ 49 0
20 ESO 381-20 G 12 46 00.4 -33 50 17   14.24   13.50 14.0 ~ 77 0
21 UGCA 319 GiP 13 02 14.39 -17 14 15.1 15.59 14.82 14.34 14.23   ~ 56 0
22 UGCA 320 GiP 13 03 16.736 -17 25 22.91 13.98 13.42 13.09 12.96 13.3 ~ 104 0
23 LEDA 166152 G 13 05 02.5 -40 04 55   16.0   16.2 16.0 ~ 52 0
24 NGC 4945 Sy2 13 05 27.279 -49 28 04.44   9.31 14.40 7.55   ~ 1322 2
25 ESO 269-58 G 13 10 32.9 -46 59 27   12.50   11.31   ~ 65 0
26 NAME Cen A Group GrG 13 20 33.9 -44 58 51           ~ 238 0
27 LEDA 166163 G 13 21 08.5 -31 31 50   17.4       ~ 51 0
28 LEDA 46663 G 13 21 47.1 -45 03 41           ~ 54 0
29 NGC 5102 EmG 13 21 57.6093133937 -36 37 48.385654208   9.74 9.65 8.47 10.2 ~ 328 1
30 LEDA 46885 GiC 13 24 36.1 -30 58 20   16.67       ~ 50 1
31 NAME Centaurus A Sy2 13 25 27.61509104 -43 01 08.8056025   8.18 6.84 6.66   ~ 4110 3
32 LEDA 46982 bCG 13 25 48.60 -11 36 38.0           ~ 77 0
33 IC 4247 GiC 13 26 44.9 -30 21 45 15.34 14.67 14.28 14.13   ~ 77 0
34 ESO 324-24 LSB 13 27 38.8 -41 28 47   12.91   12.13 12.3 ~ 89 0
35 NGC 5206 GiG 13 33 43.9609023401 -48 09 03.957844244   11.62   10.40   ~ 89 0
36 ESO 444-78 GiC 13 36 30.8 -29 14 03   15.49   14.81 15.0 ~ 77 0
37 LEDA 677373 G 13 37 00.5 -33 21 46           ~ 22 0
38 M 83 SBG 13 37 00.919 -29 51 56.74 8.85 8.11 7.52 7.21   ~ 2310 2
39 ESO 444-84 GiC 13 37 20.4 -28 02 39 16.04 15.34 15.05 15.05 14.9 ~ 103 1
40 LEDA 592761 G 13 37 25.2 -39 53 52   16.1   16.3 16.5 ~ 40 0
41 NGC 5237 IG 13 37 39.056 -42 50 48.90   13.26 12.67 12.34   ~ 95 1
42 NGC 5253 AGN 13 39 55.990 -31 38 24.11 11.48 10.94 10.49 10.33   ~ 1288 4
43 IC 4316 G 13 40 18.1 -28 53 41   15.02 15.93 14.15   ~ 69 0
44 NGC 5264 GiG 13 41 36.683 -29 54 47.25 13.86 12.96 12.39 12.14   ~ 135 1
45 ESO 325-11 G 13 45 00.7 -41 51 37   14.02   13.49 12.9 ~ 93 0
46 NAME TR 1346-35 GiG 13 49 17.5116725183 -36 03 48.862602286   11.00   10.11   ~ 99 1
47 ESO 384-16 G 13 57 01.6 -35 19 58   14.80   14.10   ~ 48 0
48 NGC 5408 EmG 14 03 20.907 -41 22 39.75   12.59   11.96 12.2 ~ 321 3
49 LEDA 51659 G 14 28 03.7 -46 18 06   15       ~ 68 1
50 ESO 222-10 G 14 35 03.0 -49 25 18   14.8   14.6 14.7 ~ 31 0
51 ESO 272-25 G 14 43 25.5 -44 42 18   14.79   14.00 13.8 ~ 34 0
52 ESO 223-9 G 15 01 08.4 -48 17 33   12.3   12.5 12.6 ~ 69 0
53 ESO 274-1 G 15 14 13.429 -46 48 33.12   12.00   10.97 11.3 ~ 93 0
54 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1464 0
55 NAME Aquarius Dwarf G 20 46 51.7 -12 50 54 15.75 15.18 14.83 14.46   ~ 407 1
56 ESO 407-18 G 23 26 27.52 -32 23 19.5 15.34 14.71 14.23 14.03   ~ 144 0
57 NAME Peg Dwarf Irregular Galaxy G 23 28 35.2 +14 44 35 13.85 13.16 12.52     ~ 431 1
58 NAME Local Group GrG ~ ~           ~ 7319 0

To bookmark this query, right click on this link: simbad:objects in 2009AJ....138.1037C and select 'bookmark this link' or equivalent in the popup menu


2021.08.01-10:55:45

© Université de Strasbourg/CNRS

    • Contact