2010A&A...511A..29M


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.10CEST01:24:45

2010A&A...511A..29M - Astronomy and Astrophysics, volume 511, A29-29 (2010/2-2)

Galaxy evolution in Local Group analogs. I. A GALEX study of nearby groups dominated by late-type galaxies.

MARINO A., BIANCHI L., RAMPAZZO R., BUSON L.M. and BETTONI D.

Abstract (from CDS):

Understanding the astrophysical processes acting within galaxy groups and their effects on the evolution of the galaxy population is one of the crucial topics of modern cosmology, as almost 60% of galaxies in the Local Universe are found in groups. We aim at learning about galaxy evolution within nearby groups dominated by late-type galaxies, specifically by studying their ultraviolet-emitting stellar population. We imaged in the far (FUV, λeff=1539Å) and near ultraviolet (NUV, λeff=2316Å) with the Galaxy Evolution Explorer (GALEX) three nearby groups, namely LGG 93, LGG 127 and LGG 225. We obtained the UV galaxy surface photometry and, for LGG 225, the only group covered by the SDSS, the photometry in u, g, r, i, z bands. We discuss galaxy morphologies looking for interaction signatures and we analyze the spectral energy distribution of galaxies to infer their luminosity-weighted ages. The UV and optical photometry was also used to perform a luminosity-weighted kinematical and dynamical analysis of each group and to evaluate the stellar mass. A few member galaxies in LGG 225 show a distorted UV morphology due to ongoing interactions. (FUV-NUV) colors suggest that spirals in LGG 93 and LGG 225 host stellar populations in their outskirts younger than that of M 31 and M 33 in the Local Group or with less extinction. The irregular interacting galaxy NGC 3447A has a significantly younger stellar population (a few Myr old) than the average of the other irregular galaxies in LGG 225 suggesting that the encounter triggered star formation. The early-type members of LGG 225, NGC 3457 and NGC 3522, have masses of the order of a few 109M, comparable to the Local Group ellipticals. For the most massive spiral in LGG 225, we estimate a stellar mass of ≃4x1010M, comparable to M 33 in the Local Group. Ages of stellar populations range from a few to ≃7Gyr for the galaxies in LGG 225. The kinematical and dynamical analysis indicates that LGG 127 and LGG 225 are in a pre-virial collapse phase, i.e. still undergoing dynamical relaxation, while LGG 93 is likely virialized. Both the photometric and the dynamical analyses suggest that LGG 225 is in a more active evolution phase than LGG 93 and LGG 127.

Abstract Copyright:

Journal keyword(s): galaxies: formation - galaxies: evolution - galaxies: interactions - galaxies: spiral - ultraviolet: galaxies

Simbad objects: 51

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Number of rows : 51

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME Magellanic Stream HVC 00 32 -30.0           ~ 815 1
2 M 110 GiG 00 40 22.0544552438 +41 41 07.496294862   8.92 8.07     ~ 1211 1
3 M 32 IG 00 42 41.825 +40 51 54.61 9.51 9.03 8.08     ~ 2014 2
4 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 10949 1
5 M 33 GiG 01 33 50.904 +30 39 35.79 6.17 6.27 5.72     ~ 5148 1
6 NAME Sgr Stream St* 02 22 +00.0           ~ 655 0
7 NGC 1249 GiG 03 10 01.2145058501 -53 20 09.004529516   12.16   11.25 12.2 ~ 89 0
8 NGC 1311 G 03 20 06.946 -52 11 07.76 13.89 13.35 12.93 12.75 13.1 ~ 105 0
9 LGG 93 GrG 03 23 32 -52 13.0           ~ 10 0
10 IC 1933 GiG 03 25 39.883 -52 47 07.73   12.91   12.19 13.0 ~ 63 0
11 IC 1954 GiG 03 31 31.393 -51 54 17.54   12.14   11.15 11.8 ~ 98 0
12 IC 1959 GiG 03 33 12.576 -50 24 51.13 13.52 13.32 12.96 12.75 12.7 ~ 86 0
13 NGC 1744 LSB 04 59 57.7384472572 -26 01 19.848876285 12.43 11.90 11.41 11.20 11.7 ~ 128 0
14 NGC 1792 EmG 05 05 14.454 -37 58 50.70   10.68 10.18 9.53 10.4 ~ 198 1
15 NGC 1800 G 05 06 25.737 -31 57 15.21 13.51 13.19 12.70 12.48 12.9 ~ 159 1
16 NGC 1808 Sy2 05 07 42.343 -37 30 46.98 11.05 10.80 9.94 9.36 10.2 ~ 653 3
17 ESO 305-9 G 05 08 07.62 -38 18 33.5   13.08   13.3 13.2 ~ 62 0
18 NAME NGC 1808 Group GrG 05 08 10.8 -37 42 18           ~ 22 0
19 NGC 1827 EmG 05 10 04.587 -36 57 36.87   13.26   12.03 12.7 ~ 53 0
20 ESO 305-17 G 05 15 00.47 -41 23 33.6   14.61   14.10 14.1 ~ 34 0
21 ESO 362-11 G 05 16 38.800 -37 06 09.07   13.05   11.78 12.5 ~ 75 0
22 ESO 362-19 G 05 21 04.2 -36 57 24   14.13   13.31 14.1 ~ 47 0
23 NGC 3109 G 10 03 06.877 -26 09 34.46 11.10 10.42 10.04 9.91   ~ 695 2
24 NGC 3370 GiG 10 47 04.039 +17 16 25.31   12.4       ~ 208 0
25 NGC 3443 GiG 10 53 00.117 +17 34 25.06   14.7       ~ 42 0
26 NGC 3447 GiP 10 53 23.9703236654 +16 46 20.740405467   14.3       ~ 78 0
27 UGC 6007 GiP 10 53 29.656 +16 47 09.64   14.3       ~ 25 0
28 LGG 225 GrG 10 54 00 +17 05.4           ~ 10 0
29 UGC 6022 G 10 54 15.333 +17 48 36.89   17       ~ 15 0
30 NGC 3454 GiP 10 54 29.458 +17 20 38.58   14.1       ~ 104 0
31 NGC 3455 GiP 10 54 31.0915671343 +17 17 04.949559164   13.1       ~ 144 0
32 NGC 3457 GiG 10 54 48.6362871430 +17 37 16.421821766   13.0       ~ 89 0
33 UGC 6035 GiG 10 55 29.110 +17 08 33.08   15.2       ~ 27 0
34 UGC 6083 LSB 11 00 23.794 +16 41 31.76   15.2       ~ 36 0
35 UGC 6112 GiG 11 02 35.229 +16 44 05.18   14.5       ~ 34 0
36 NGC 3501 GiP 11 02 47.307 +17 59 22.31   13.8       ~ 124 0
37 NGC 3507 GiP 11 03 25.3605473839 +18 08 07.606955348   11.4       ~ 155 0
38 NGC 3522 GiG 11 06 40.4634151666 +20 05 07.901375486   14.13       ~ 94 1
39 UGC 6171 GiG 11 07 10.335 +18 34 14.48   15.1       ~ 31 0
40 NGC 3552 GiG 11 10 42.843 +28 41 34.82   15.1       ~ 33 0
41 ESO 572-23 GiP 11 56 57.9021496929 -19 51 18.410698751   13.52   11.94   ~ 29 0
42 NGC 4024 GiG 11 58 31.249 -18 20 48.64   12.91   11.29   ~ 67 0
43 NGC 4033 GiG 12 00 34.7434001813 -17 50 33.470638824   12.79   11.32   ~ 90 0
44 NGC 4038 GiP 12 01 53.002 -18 52 03.32   10.91   9.74 11.0 ~ 1276 1
45 NGC 4697 GiG 12 48 35.8992791100 -05 48 02.497675635   10.97   9.83   ~ 804 0
46 NGC 5084 LIN 13 20 16.923 -21 49 39.28   11.15 12.21 9.84 10.5 ~ 162 0
47 M 51 GiP 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 3794 4
48 NAME Serpens Dwarf GlC 15 16 05.30 -00 06 41.0   15.1       ~ 629 1
49 NGC 6022 LIN 15 57 47.7648706763 +16 16 56.313263001   15.2       ~ 26 0
50 NAME Monoceros Stream St* ~ ~           ~ 311 0
51 NAME Orphan Stream St* ~ ~           ~ 193 0

    Equat.    Gal    SGal    Ecl

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2020.08.10-01:24:45

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