2015MNRAS.448..221E

Query : 2015MNRAS.448..221E

2015MNRAS.448..221E - Mon. Not. R. Astron. Soc., 448, 221-236 (2015/March-3)

The neutral gas content of post-merger galaxies.

ELLISON S.L., FERTIG D., ROSENBERG J.L., NAIR P., SIMARD L., TORREY P. and PATTON D.R.

Abstract (from CDS):

Measurements of the neutral hydrogen gas content of a sample of 93 post-merger galaxies are presented, from a combination of matches to the ALFALFA.40 data release and new Arecibo observations. By imposing completeness thresholds identical to that of the ALFALFA (Arecibo Legacy Fast ALFA) survey, and by compiling a mass-, redshift- and environment-matched control sample from the public ALFALFA.40 data release, we calculate gas fraction offsets (Δfgas) for the post-mergers, relative to the control sample. We find that the post-mergers have Hi gas fractions that are consistent with undisturbed galaxies. However, due to the relative gas richness of the ALFALFA.40 sample, from which we draw our control sample, our measurements of gas fraction enhancements are likely to be conservative lower limits. Combined with comparable gas fraction measurements by Fertig et al. in a sample of galaxy pairs, who also determine gas fraction offsets consistent with zero, we conclude that there is no evidence for significant neutral gas consumption throughout the merger sequence. From a suite of 75 binary merger simulations we confirm that star formation is expected to decrease the post-merger gas fraction by only 0.06 dex, even several Gyr after the merger. Moreover, in addition to the lack of evidence for gas consumption from gas fraction offsets, the observed Hi detection fraction in the complete sample of post-mergers is twice as high as the controls, which suggests that the post-merger gas fractions may actually be enhanced. We demonstrate that a gas fraction enhancement in post-mergers, relative to a stellar mass-matched control sample, would indeed be the natural result of merging randomly drawn pairs from a parent population which exhibits a declining gas fraction with increasing stellar mass.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): Galaxies: interactions - galaxies: ISM - galaxies: peculiar

Simbad objects: 93

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Number of rows : 93
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 LEDA 1177127 G 00 05 27.47886 +00 50 49.2421           ~ 5 0
2 ISI96 0016-0052 LSB 00 19 30.681 -00 36 06.34   16.1       ~ 7 0
3 Z 434-24 G 00 35 06.4880287896 +14 21 17.419945356   15.3       ~ 23 0
4 Z 436-30 LIN 01 20 02.654 +14 21 41.73   14.9       ~ 176 1
5 LEDA 1451706 G 01 54 29.208 +14 11 43.69           ~ 8 0
6 MCG+02-06-021 EmG 02 03 59.110 +14 18 37.48   15       ~ 28 0
7 LEDA 1575816 G 07 49 30.168 +18 57 28.12           ~ 8 0
8 NVSS J075335+262742 rG 07 53 35.1239651304 +26 27 44.564998680           ~ 14 0
9 LEDA 79106 G 07 56 58.7769762504 +34 05 34.150245468   17.5       ~ 8 0
10 NVSS J080221+195935 rG 08 02 21.3446137728 +19 59 37.099591980           ~ 13 0
11 Z 118-56 rG 08 03 28.0664075088 +25 06 09.524485260   15.2       ~ 58 0
12 Z 60-14 LIN 08 26 23.2470033048 +08 25 25.589252712   15.3       ~ 17 0
13 Z 179-15 LIN 08 38 18.387 +33 34 41.37   15.6       ~ 20 0
14 SDSS J084344.98+354942.0 Sy2 08 43 44.9739924504 +35 49 42.113462340   17.93 17.55     ~ 59 0
15 SDSS J085507.37+151608.3 G 08 55 07.37049 +15 16 08.3172           ~ 2 0
16 Z 34-13 Sy2 09 13 12.4213040208 +05 36 39.176774136   15.50       ~ 28 0
17 NVSS J092219+311701 rG 09 22 19.9082378747 +31 17 10.368011165           ~ 12 0
18 LEDA 3530677 G 09 33 47.4165024168 +10 48 42.529050108           ~ 7 0
19 LEDA 27230 AG? 09 34 47.216 +32 08 36.40   17       ~ 10 0
20 LEDA 3091118 G 09 43 46.5721736112 +11 27 23.096957940           ~ 17 0
21 LEDA 3092152 LIN 09 44 26.9652200520 +04 29 56.781210768           ~ 24 0
22 Z 7-34 rG 09 47 11.755 +00 42 09.72   15.5       ~ 18 0
23 Z 63-68 G 09 47 18.4398662760 +12 09 30.575786184   15.7       ~ 14 0
24 SDSS J095312.32+130603.4 G 09 53 12.3300721560 +13 06 03.462459300           ~ 5 0
25 Z 64-31 GiG 10 01 03.4038308016 +11 27 41.221318356   14.9       ~ 31 0
26 Z 36-21 LIN 10 01 34.2537867192 +06 55 55.288732116   15.6       ~ 19 0
27 NVSS J100719+095220 rG 10 07 19.2688320264 +09 52 20.843513256           ~ 14 0
28 Z 36-41 AGN 10 07 20.6576699544 +04 04 45.497033688   15.1       ~ 31 0
29 Z 36-48 AG? 10 10 37.167 +05 09 02.87   14.9       ~ 25 0
30 NVSS J101410+342036 rG 10 14 10.56460 +34 20 34.8118   16       ~ 25 0
31 Z 36-77 rG 10 15 59.944 +04 57 17.12   14.7       ~ 46 0
32 Z 36-81 G 10 16 24.1999710576 +05 41 43.400516496   15.6       ~ 10 0
33 2MASX J10183368+3613263 Sy2 10 18 33.6528029568 +36 13 26.653281924           ~ 17 0
34 LEDA 1440148 G 10 21 35.63541 +13 46 31.8481           ~ 8 0
35 2MASX J10231431+1252235 GiC 10 23 14.3265878784 +12 52 23.988834876           ~ 12 0
36 LEDA 1412010 G 10 26 11.3306563032 +12 34 25.729248864           ~ 15 0
37 Z 37-89 rG 10 36 31.880 +02 21 44.10   15.6 18.62     ~ 28 2
38 Z 65-73 rG 10 37 52.4425559520 +10 45 30.056001876   15.1       ~ 21 0
39 ZW VIII 101 LIN 10 41 03.7556971704 +11 05 46.356127728   17.5       ~ 14 0
40 Z 37-112 rG 10 41 09.7418947440 +06 49 12.037465128   15.7       ~ 21 0
41 LEDA 1162663 G 10 43 09.74921 +00 18 50.1494   17.940   16.564   ~ 3 0
42 NVSS J105143+104521 rG 10 51 43.27458 +10 45 24.8114           ~ 8 0
43 Z 38-44 G 10 54 04.3829454984 +06 43 31.329168780   15.4       ~ 19 0
44 SDSS J105450.39+120525.2 LIN 10 54 50.4033545904 +12 05 25.311297228           ~ 3 0
45 Z 38-62 EmG 10 57 31.1503747176 +05 41 55.434189156   15.2       ~ 25 0
46 IC 666 GiG 11 01 14.8113945288 +10 28 52.059041940   15.3       ~ 29 0
47 LEDA 1339172 G 11 01 58.9446404448 +08 06 31.983047892           ~ 15 0
48 Z 38-107 G 11 04 11.1706195224 +07 04 08.530585320   15.2       ~ 12 0
49 Z 39-4 G 11 08 00.9930842760 +07 26 32.336738952   15.3       ~ 24 0
50 LEDA 1173831 G 11 12 56.3120861136 +00 43 32.306832912   17.312   15.884   ~ 5 0
51 LEDA 1890079 G 11 24 34.1459421048 +30 05 44.916792180           ~ 7 0
52 NGC 3695 G 11 29 17.0838231408 +35 34 32.610984564   14.9       ~ 23 0
53 LEDA 1290867 G 11 30 30.864 +05 53 30.53           ~ 13 0
54 UGC 6557 G 11 35 07.529 +29 53 27.99   16.0       ~ 22 0
55 IC 2941 LIN 11 36 09.9737501664 +10 03 20.027333340   15.0       ~ 28 0
56 LEDA 1662507 G 11 41 03.116 +22 02 52.41           ~ 7 0
57 LEDA 1682548 G 11 44 44.0293443360 +23 09 44.911888524           ~ 14 0
58 Z 68-66 AG? 11 47 10.144 +10 31 03.87   15.7       ~ 17 0
59 LEDA 37330 G 11 54 03.9796073424 +23 20 23.602824636   16       ~ 13 0
60 Z 68-89 G 11 54 24.9707590344 +09 36 32.506809912   15.5       ~ 11 0
61 Z 68-90 G 11 54 32.9857038288 +09 32 40.364788092   15.6       ~ 18 0
62 2MASX J11580967+0932088 G 11 58 09.7116771984 +09 32 07.968585012           ~ 4 0
63 Z 13-54 GiG 12 03 59.57565 +01 24 39.0571   15.4   14.726   ~ 31 0
64 LEDA 1364503 G 12 04 15.7530921408 +09 23 48.829025112           ~ 12 0
65 Z 41-67 LSB 12 17 55.81205 +05 52 11.2386   15.5       ~ 30 0
66 MCG+06-27-047 EmG 12 20 15.689 +33 39 39.09   16.0       ~ 43 0
67 NVSS B122012+123415 rG 12 22 45.1819378872 +12 17 37.638903408           ~ 22 0
68 NGC 4320 rG 12 22 57.7226454312 +10 32 53.944450872   15.3       ~ 52 0
69 Z 70-179 G 12 34 43.5417744912 +09 00 16.874437284   15.4       ~ 48 0
70 Mrk 779 G 12 39 36.0437604432 +12 26 20.021340408   16.5       ~ 35 0
71 Z 43-85 AG? 12 58 21.1524855000 +04 53 08.390825700   15.3       ~ 34 0
72 KPG 365b GiP 13 07 03.4699189224 +13 38 13.304389308           ~ 5 0
73 Z 44-51 Sy2 13 16 59.80967 +05 39 24.9590   15.5       ~ 27 0
74 Z 44-70 AG? 13 19 57.8701196472 +05 48 28.344336516   15.3       ~ 34 0
75 Z 44-80 G 13 24 09.6342139680 +05 15 35.191594908   15.4       ~ 22 0
76 SDSS J132447.57+081743.1 G 13 24 47.5795136784 +08 17 43.134599544           ~ 3 0
77 FIRST J132505.7+273243 rG 13 25 05.783 +27 32 42.76           ~ 10 0
78 NVSS J132921+112012 rG 13 29 21.1232108112 +11 20 11.505600132           ~ 19 0
79 Mrk 789 AGN 13 32 24.240 +11 06 22.59   15.41 14.87     ~ 123 0
80 LEDA 3091159 G 13 57 01.1778725952 +11 36 41.237351640           ~ 15 0
81 Z 46-38 LIN 14 02 12.1927517640 +04 35 08.620879596   15.2       ~ 25 0
82 LEDA 1403101 G 14 52 13.6786805568 +12 03 38.317508352           ~ 9 0
83 NVSS J150517+080910 rG 15 05 17.9262118968 +08 09 13.171835556   15.96       ~ 24 0
84 SDSS J151253.53+100635.7 G 15 12 53.527 +10 06 35.81           ~ 7 0
85 NVSS J153601+253301 rG 15 36 01.465 +25 33 03.70           ~ 14 0
86 LEDA 1739861 EmG 15 48 16.28534 +25 31 37.2738           ~ 15 0
87 LEDA 3568087 G 15 49 54.8079400296 +09 49 43.160472876           ~ 12 0
88 SDSS J214056.23-002839.5 G 21 40 56.23313 -00 28 39.5303           ~ 4 0
89 LEDA 1469346 G 22 49 56.55698 +14 52 28.9350           ~ 4 0
90 LEDA 1189096 G 22 52 04.5531546120 +01 15 00.526554504           ~ 10 0
91 2MASX J23251420+1514417 GiC 23 25 14.1796385736 +15 14 42.185610564           ~ 16 0
92 Z 432-29 G 23 46 29.7217499136 +14 53 11.929289964   15.6       ~ 9 0
93 LEDA 1466215 G 23 51 59.0871077616 +14 45 04.094521776           ~ 11 0

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