2017MNRAS.464..329Y

Query : 2017MNRAS.464..329Y

2017MNRAS.464..329Y - Mon. Not. R. Astron. Soc., 464, 329-355 (2017/January-1)

Star formation associated with neutral hydrogen in the outskirts of early-type galaxies.

YILDIZ M.K., SERRA P., PELETIER R.F., OOSTERLOO T.A. and DUC P.-A.

Abstract (from CDS):

About 20 per cent of all nearby early-type galaxies (M* >= 6 x 109 M☉) outside the Virgo cluster are surrounded by a disc or ring of low-column-density neutral hydrogen (H I) gas with typical radii of tens of kpc, much larger than the stellar body. In order to understand the impact of these gas reservoirs on the host galaxies, we analyse the distribution of star formation out to large radii as a function of H I properties using GALEX UV and SDSS optical images. Our sample consists of 18 H I-rich galaxies as well as 55 control galaxies where no H I has been detected. In half of the H I-rich galaxies, the radial UV profile changes slope at the position of the H I radial profile peak. To study the stellar populations, we calculate the FUV-NUV and UV-optical colours in two apertures, 1-3 and 3-10 Reff. We find that H I-rich galaxies are on average 0.5 and 0.8 mag bluer than the H I-poor ones, respectively. This indicates that a significant fraction of the UV emission traces recent star formation and is associated with the H I gas. Using FUV emission as a proxy for star formation, we estimate the integrated star formation rate in the outer regions (R > 1Reff) to be on average ∼6 x 10–3 M☉ yr–1 for the H I-rich galaxies. This rate is too low to build a substantial stellar disc and, therefore, change the morphology of the host. We find that the star formation efficiency and the gas depletion time are similar to those at the outskirts of spirals.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: elliptical and lenticular, cD - galaxies: evolution - galaxies: ISM - galaxies: statistics - galaxies: stellar content - galaxies: stellar content

Simbad objects: 83

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Number of rows : 83
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 404 LIN 01 09 27.02 +35 43 05.3   12.56 11.73     ~ 511 0
2 NGC 661 GiG 01 44 14.5989233928 +28 42 21.162014388   13.0       ~ 107 0
3 NGC 770 GiP 01 59 13.6426514184 +18 57 16.714843308   13.91 13.49     ~ 111 1
4 NGC 821 AG? 02 08 21.1358498040 +10 59 41.832436704   12.210 11.310 10.739 9.744 ~ 592 0
5 Z 117-62 AG? 07 40 22.7432879424 +23 16 29.952956244   15.0       ~ 80 0
6 NGC 2549 AG? 08 18 58.3507032336 +57 48 11.022298740   12.1       ~ 271 0
7 NGC 2577 GiP 08 22 43.4495600280 +22 33 11.142071640   13.8       ~ 133 0
8 NGC 2592 AG? 08 27 08.0516435904 +25 58 13.122058224   13.6       ~ 126 0
9 NGC 2594 AG? 08 27 17.1616179576 +25 52 43.686523164   15.0       ~ 60 0
10 Z 237-15 AG? 08 44 05.9308682352 +49 47 37.870900980 13.87 13.40 12.46     ~ 106 1
11 NGC 2679 GiP 08 51 32.9418201528 +30 51 55.211530176   14.3       ~ 81 0
12 NGC 2685 Sy2 08 55 34.7027817000 +58 44 03.876540108   13.68 12.70     ~ 459 1
13 NGC 2764 GiG 09 08 17.5023934176 +21 26 36.007547028   13.9       ~ 130 1
14 NGC 2852 GiP 09 23 14.6019569160 +40 09 49.759151868   14.0       ~ 73 0
15 NGC 2859 AG? 09 24 18.5266762368 +34 30 48.561305832   11.8       ~ 270 0
16 NGC 2950 AG? 09 42 35.1484995048 +58 51 04.584956904   11.8       ~ 223 0
17 NGC 3098 GiG 10 02 16.6969955520 +24 42 39.887384724   13.00       ~ 143 0
18 NGC 3230 LSB 10 23 43.9569304632 +12 34 03.913754088   14.9       ~ 66 0
19 NGC 3245 LIN 10 27 18.3864983136 +28 30 26.621599932   11.6       ~ 372 0
20 NGC 3248 GiG 10 27 45.4389454896 +22 50 49.805614320   13.9       ~ 83 0
21 NGC 3301 GiG 10 36 56.0401118904 +21 52 55.516904976   12.2       ~ 152 0
22 NGC 3377 GiP 10 47 42.400 +13 59 08.30 11.55 11.24 10.38     ~ 798 1
23 NGC 3400 GiG 10 50 45.4714077120 +28 28 08.670392472   14.3       ~ 62 0
24 NGC 3414 GiC 10 51 16.2099174408 +27 58 30.297624852   12.1       ~ 353 0
25 NGC 3458 GiG 10 56 01.4778952176 +57 07 01.095032244   13.20       ~ 117 1
26 NGC 3522 GiG 11 06 40.4644062552 +20 05 07.900946304   14.13       ~ 116 1
27 Z 125-29 H2G 11 07 24.6828148008 +21 39 25.578974664   14.8       ~ 83 0
28 NGC 3595 GiG 11 15 25.5491549736 +47 26 49.424185356   13.0       ~ 73 0
29 NGC 3605 GiG 11 16 46.5896102400 +18 01 01.777666908   12.7       ~ 261 0
30 NGC 3610 GiG 11 18 25.2827189856 +58 47 10.433735988   11.4       ~ 327 0
31 NGC 3613 GiG 11 18 36.130 +57 59 59.73   11.6       ~ 221 0
32 NGC 3619 GiG 11 19 21.5781353400 +57 45 28.018459368   12.6       ~ 180 0
33 NGC 3626 GiG 11 20 03.8069651160 +18 21 24.543304164   11.2       ~ 282 0
34 NGC 3648 GiG 11 22 31.5070422432 +39 52 36.753613320   13.57 12.64     ~ 84 0
35 NGC 3658 GiG 11 23 58.2657360576 +38 33 44.359464384   13.3       ~ 88 0
36 NGC 3665 GiG 11 24 43.630 +38 45 46.05 13.71 13.26 11.62     ~ 364 1
37 NGC 3674 GiG 11 26 26.6135762208 +57 02 54.069580860   13.1       ~ 85 0
38 NGC 3757 GiG 11 37 02.8650138288 +58 24 55.817369748   13.5       ~ 87 0
39 NGC 3796 GiG 11 40 31.1262142584 +60 17 55.999438980   13.4       ~ 79 0
40 NGC 3838 GiP 11 44 13.7648109936 +57 56 53.538816012   12.7       ~ 102 0
41 NGC 3941 Sy2 11 52 55.3609498656 +36 59 10.716212904   11.45 11.62 9.97   ~ 261 0
42 NGC 3945 GiG 11 53 13.6081388304 +60 40 32.125024704   11.6       ~ 265 0
43 NGC 3998 Sy2 11 57 56.1334044408 +55 27 12.922443432   11.64 12.10 10.09   ~ 682 2
44 NGC 4036 LIN 12 01 26.7603659808 +61 53 44.625848784   12.18 11.20     ~ 282 0
45 NGC 4078 GiG 12 04 47.6340386496 +10 35 44.325761640   13.9       ~ 84 0
46 NGC 4143 LIN 12 09 36.0679174440 +42 32 03.031963368   13.04 12.08     ~ 251 0
47 NGC 4203 LIN 12 15 05.0549203560 +33 11 50.383965120   12.98 11.99     ~ 514 2
48 NGC 4262 GiG 12 19 30.5694336288 +14 52 39.517143276 13.00 12.49 11.55     ~ 378 1
49 NGC 4267 GiG 12 19 45.2735790120 +12 47 53.704780368   12.4       ~ 256 0
50 NGC 4278 LIN 12 20 06.8242 +29 16 50.722 11.54 11.09 10.16     ~ 988 2
51 NGC 4283 GiG 12 20 20.7691223880 +29 18 39.154727556 13.47 13.00 12.07     ~ 209 1
52 NGC 4346 GiG 12 23 27.9622537560 +46 59 37.642074396   12.3       ~ 122 0
53 NGC 4340 GiP 12 23 35.2816311336 +16 43 20.443217952   12.4       ~ 288 0
54 NGC 4377 GiG 12 25 12.3315185232 +14 45 43.811084016   12.5       ~ 239 0
55 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
56 NGC 4503 GiP 12 32 06.2324986032 +11 10 34.960071396 12.66 12.05 11.07     ~ 225 1
57 Malin 1 LSB 12 36 59.3463193464 +14 19 49.164305988   17.80       ~ 224 0
58 IC 3631 AG? 12 39 48.0178208472 +12 58 26.295194604   14.5       ~ 102 0
59 NGC 4762 LIN 12 52 56.049 +11 13 50.88   11.1       ~ 377 0
60 Z 71-82 AG? 12 58 18.746 +13 23 29.07   14.9       ~ 51 0
61 MCG-06-29-004 EmG 13 01 05.3881739880 -35 36 59.520031884   14.02   12.77 13.1 ~ 46 0
62 NGC 5103 GiG 13 20 30.1029602496 +43 05 02.219249040   13.6       ~ 100 0
63 NGC 5173 GiP 13 28 25.2798599736 +46 35 29.890508928   13.10       ~ 153 1
64 NGC 5273 Sy1 13 42 08.3801616672 +35 39 15.467518836   14.01 13.12     ~ 510 0
65 NGC 5308 GiP 13 47 00.4361008824 +60 58 23.334066588   12.5       ~ 217 0
66 NGC 5322 SyG 13 49 15.24 +60 11 25.8   11.3       ~ 432 2
67 NGC 5342 GiG 13 51 25.898 +59 51 46.85   14.4       ~ 68 0
68 NGC 5379 GiP 13 55 34.347 +59 44 34.17   14.1       ~ 108 0
69 Z 246-28 GiG 13 56 58.0631953080 +45 58 23.672587944   14.3       ~ 66 0
70 NGC 5475 GiG 14 05 12.4060318056 +55 44 30.694106112   13.4       ~ 107 0
71 NGC 5485 LIN 14 07 11.3594809920 +55 00 06.084219996 14.34 13.82 12.22     ~ 267 0
72 Z 272-32 GiG 14 07 39.2769935208 +54 47 40.635200328   14.7       ~ 52 0
73 NGC 5500 GiG 14 10 15.2332280184 +48 32 46.013176572   14.5       ~ 72 0
74 NGC 5582 GiP 14 20 43.1108121696 +39 41 36.927369816   13.0       ~ 128 0
75 NGC 5611 AG? 14 24 04.7758256208 +33 02 50.707920444   13.5       ~ 94 0
76 NGC 5631 Sy2 14 26 33.2913328320 +56 34 57.424681848   13.51 12.55     ~ 204 0
77 Z 247-32 GiG 14 29 14.4628913448 +44 41 56.451152832   15.2       ~ 50 0
78 Z 192-59 AG? 14 46 21.127 +34 22 14.34   14.4       ~ 103 0
79 NGC 6149 LIN 16 27 24.2315841696 +19 35 49.852602960   14.8       ~ 63 0
80 NGC 6547 AG? 18 05 10.0215915936 +25 13 57.451423620   14.3       ~ 50 0
81 NGC 6548 GiP 18 05 59.2439762424 +18 35 14.256371040   13.1       ~ 82 0
82 NGC 6798 AG? 19 24 03.1663172664 +53 37 29.387614044   14.5       ~ 69 0
83 NGC 7457 AG? 23 00 59.9263288440 +30 08 41.764398792   11.04 11.87     ~ 459 0

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