2011MNRAS.411..311M

Query : 2011MNRAS.411..311M

2011MNRAS.411..311M - Mon. Not. R. Astron. Soc., 411, 311-331 (2011/February-2)

Nearby early-type galaxies with ionized gas: the UV emission from GALEX observations.

MARINO A., RAMPAZZO R., BIANCHI L., ANNIBALI F., BRESSAN A., BUSON L.M., CLEMENS M.S., PANUZZO P. and ZEILINGER W.W.

Abstract (from CDS):

We present GALEX far-ultraviolet (FUV, λeff= 1538Å) and near-ultraviolet (NUV, λeff= 2316Å) surface photometry of 40 early-type galaxies (ETGs) selected from a wider sample of 65 nearby ETGs showing emission lines in their optical spectra. We derive FUV and NUV surface brightness profiles, (FUV-NUV) colour profiles and D25integrated magnitudes. We extend the photometric study to the optical r band from SDSS imaging for 14 of these ETGs. In general, the (FUV-NUV) radial colour profiles become redder with galactocentric distance in both rejuvenated ( ≤ 4 Gyr) and old ETGs. Colour profiles of NGC 1533, NGC 2962, NGC 2974, NGC 3489 and IC 5063 show rings and/or arm-like structures, bluer than the body of the galaxy, suggesting the presence of recent star formation. Although seven of our ETGs show shell systems in their optical image, only NGC 7135 displays shells in the UV bands. We characterize the UV and optical surface brightness profiles, along the major axis, using a Sersic law. The Sersic law exponent, n, varies from 1 to 16 in the UV bands. S0 galaxies tend to have lower values of n ( ≤ 5). The Sersic law exponent n= 4 seems to be a watershed: ETGs with n > 4 tend to have [α/Fe] greater than 0.15, implying a short star-formation time-scale. We find a significant correlation between the FUV-NUV colour and central velocity dispersions σ, with the UV colours getting bluer at larger σ. This trend is likely driven by a combined effect of `downsizing' and of the mass-metallicity relation.

Based on GALEX observations: GI3-0087 PI R. Rampazzo.


Abstract Copyright: 2010 The Authors Journal compilation2010 RAS

Journal keyword(s): galaxies: elliptical and lenticular, cD - galaxies: evolution - galaxies: formation - galaxies: fundamental parameters - galaxies: photometry

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 - 2026 		#notes
1 NGC 128 GiG 00 29 15.0429950112 +02 51 50.564329164   13.2       ~ 210 0
2 NGC 777 BLL 02 00 14.9065707744 +31 25 45.850721628 13.09 12.49 11.45     ~ 195 2
3 NGC 1052 Bla 02 41 04.79849989 -08 15 20.7519527 11.84 11.41 10.47 10.71   ~ 1397 2
4 NGC 1209 EmG 03 06 03.020 -15 36 40.58   12   11.42   ~ 153 0
5 NGC 1380 Sy2 03 36 27.590 -34 58 34.68 11.32 10.94 9.93 9.37   ~ 460 1
6 NGC 1389 EmG 03 37 11.7427350576 -35 44 45.873195000 12.80 12.39 11.50 10.99   ~ 208 1
7 ACO S 373 ClG 03 38 29.4 -35 27 08           ~ 2029 0
8 NGC 1407 rG 03 40 11.904 -18 34 49.36   10.64 9.67 9.13   ~ 613 2
9 NGC 1426 GiG 03 42 49.0997091480 -22 06 30.173615028   12.21 11.44 10.90   ~ 205 0
10 NGC 1453 EmG 03 46 27.2307890592 -03 58 07.831476768   13   11.30   ~ 189 0
11 NGC 1521 GiG 04 08 18.9110259504 -21 03 07.337782908   12.31   10.73   ~ 122 0
12 IC 2038 GiP 04 08 53.7569973144 -55 59 21.778144080   14.82   13.80   ~ 43 0
13 NGC 1533 EmG 04 09 51.8356041744 -56 07 06.410207352   11.77 10.92 10.27 11.0 ~ 209 0
14 NGC 1553 GiP 04 16 10.4697802536 -55 46 48.072797400 10.76 10.10 9.40 8.74   ~ 395 2
15 NGC 1947 GiG 05 26 47.613 -63 45 36.08   11.76 10.80 10.06   ~ 141 0
16 NGC 2865 GiG 09 23 30.205 -23 09 41.37   12.39 11.43 11.06   ~ 244 0
17 NGC 2911 Sy2 09 33 46.10739467 +10 09 08.8215304   14.96 13.83     ~ 259 0
18 NGC 2962 GiP 09 40 53.9321546928 +05 09 57.032828496   13.1       ~ 210 0
19 NGC 2974 Sy2 09 42 33.2918467632 -03 41 57.038311068   12.19   10.77   ~ 463 0
20 NGC 3258 EmG 10 28 53.588 -35 36 19.98   12.50 11.72 10.86   ~ 200 0
21 NGC 3268 EmG 10 30 00.6490581240 -35 19 31.519591284   12.57 11.77 10.68   ~ 163 0
22 NGC 3489 GiG 11 00 18.5483994744 +13 54 04.206202668 11.46 11.12 10.29     ~ 429 1
23 NGC 3607 Sy2 11 16 54.65687 +18 03 06.5120   13.84 12.76     ~ 490 1
24 NGC 3818 EmG 11 41 57.3563891040 -06 09 20.459153376   13   11.78   ~ 186 0
25 NGC 3962 LIN 11 54 40.0986420456 -13 58 30.234748836   13.16 12.16 11.15   ~ 162 1
26 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1841 2
27 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
28 M 89 Sy2 12 35 39.80733343 +12 33 22.8308657 11.29 10.73 9.75     ~ 1037 2
29 NGC 4697 GiG 12 48 35.8981498824 -05 48 02.482374564   10.97   9.83   ~ 895 0
30 NGC 5011 EmG 13 12 51.8644891368 -43 05 46.645742832   12.14 11.33 10.51   ~ 92 0
31 NGC 5018 GiP 13 13 01.0452720960 -19 31 05.649751992   11.71   10.31   ~ 335 1
32 NGC 5044 BiC 13 15 23.9607836592 -16 23 07.547751744   11.9   10.74   ~ 531 0
33 NGC 5193 EmG 13 31 53.5259062992 -33 14 03.597186840   12.69 11.92 11.31 11.60 ~ 108 0
34 IC 4296 rG 13 36 39.03253319 -33 57 57.0730368   11.52 12.99 10.00 10.79 ~ 520 2
35 NGC 5363 rG 13 56 07.24367 +05 15 16.9200 12.59 12.12 10.51     ~ 235 1
36 NGC 5638 GiP 14 29 40.3717451400 +03 13 59.987811648 12.57 12.14 11.20     ~ 252 2
37 NGC 5813 LIN 15 01 11.2302420864 +01 42 07.141569696 12.00 11.45 10.46 10.06   ~ 673 2
38 NGC 5831 GiG 15 04 07.0002600408 +01 13 11.705607012   13.1   11.19   ~ 304 0
39 NGC 5846 rG 15 06 29.253 +01 36 20.29   11.9   9.74   ~ 891 2
40 NGC 6721 EmG 19 00 50.815 -57 45 33.77   13.23 12.04 11.48   ~ 72 0
41 NGC 6758 GiG 19 13 52.3655323032 -56 18 36.095195484   12.53 11.56 10.83   ~ 83 0
42 NGC 6868 Sy2 20 09 54.08207 -48 22 46.2470   11.58 9.22 10.01 7.91 ~ 239 2
43 NGC 6958 AG? 20 48 42.6064604520 -37 59 50.876997504 12.79 12.27 11.42 10.83   ~ 168 1
44 IC 5063 Bla 20 52 02.15 -57 04 06.7   12.92 13.60 11.30   ~ 710 1
45 NGC 7007 Sy2 21 05 27.9140607744 -52 33 07.159314492   12.89 12.04 11.43   ~ 66 0
46 NGC 7079 GiG 21 32 35.2418074440 -44 04 03.412507188   12.63 11.61 11.08   ~ 128 0
47 NGC 7135 Sy1 21 49 46.0013389728 -34 52 34.575955536   12.25 13.30 10.84   ~ 95 0
48 NGC 7192 Sy2 22 06 50.1107894976 -64 18 58.721070096   12.21 11.21 10.77   ~ 148 0
49 NGC 7332 GiP 22 37 24.5373044952 +23 47 53.830708800   12.0       ~ 391 0
50 NGC 7377 Sy2 22 47 47.4743722752 -22 18 43.770561516   11.39 12.78 10.53   ~ 105 0
51 IC 1459 rG 22 57 10.60682195 -36 27 43.9966421   10.96 11.85 9.34 10.3 ~ 652 2

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