2017ApJ...849...26U

Query : 2017ApJ...849...26U

2017ApJ...849...26U - Astrophys. J., 849, 26-26 (2017/November-8)

The EDGE-CALIFA survey: variations in the molecular gas depletion time in local galaxies.

UTOMO D., BOLATTO A.D., WONG T., OSTRIKER E.C., BLITZ L., SANCHEZ S.F., COLOMBO D., LEROY A.K., CAO Y., DANNERBAUER H., GARCIA-BENITO R., HUSEMANN B., KALINOVA V., LEVY R.C., MAST D., ROSOLOWSKY E. and VOGEL S.N.

Abstract (from CDS):

We present results from the EDGE survey, a spatially resolved CO(1-0) follow-up to CALIFA, an optical Integral Field Unit survey of local galaxies. By combining the data products of EDGE and CALIFA, we study the variation in molecular gas depletion time (τdep) on kiloparsec scales in 52 galaxies. We divide each galaxy into two parts: the center, defined as the region within 0.1 R25, and the disk, defined as the region between 0.1 and 0.7 R25. We find that 14 galaxies show a shorter τdep (∼1 Gyr) in the center relative to that in the disk (τdep ∼ 2.4 Gyr), which means the central region in those galaxies is more efficient at forming stars per unit molecular gas mass. This finding implies that the centers with shorter τdep resemble the intermediate regime between galactic disks and starburst galaxies. Furthermore, the central drop in τdep is correlated with a central increase in the stellar surface density, suggesting that a shorter τdep is associated with molecular gas compression by the stellar gravitational potential. We argue that varying the CO-to-H2 conversion factor only exaggerates the central drop of τdep.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: star formation - galaxies: structure - ISM: abundances - ISM: molecules - ISM: molecules

Simbad objects: 54

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Number of rows : 54
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 7819 GiG 00 04 24.495 +31 28 19.30   14.3       ~ 134 0
2 NGC 477 Sy2 01 21 20.3410541880 +40 29 17.414141208   14.0       ~ 110 0
3 IC 1683 GiG 01 22 38.867 +34 26 13.21   14.2       ~ 101 0
4 NGC 496 GiG 01 23 11.5872831672 +33 31 45.417105984   14.3       ~ 118 0
5 NGC 551 AG? 01 27 40.6324938696 +37 10 58.791231552   13.5       ~ 99 0
6 Z 362-5 AG? 05 19 41.625 +84 03 09.10   13.1       ~ 82 0
7 NGC 2253 AG? 06 43 14.6846186952 +65 40 38.950679568   15.0       ~ 66 0
8 NGC 2347 LIN 07 16 04.087 +64 42 41.54   13.2       ~ 130 0
9 NGC 2480 GiP 07 57 10.444 +23 46 46.68   15.2       ~ 52 0
10 Z 178-14 GiG 07 59 13.0699024344 +32 54 52.934088096   13.5       ~ 114 1
11 Z 263-45 GiG 08 33 22.6940205816 +52 31 56.111258604   14.32       ~ 65 1
12 NGC 2730 G 09 02 15.839 +16 50 17.51   13.7       ~ 89 0
13 NGC 2906 AGN 09 32 06.2228278920 +08 26 30.486567516   13.1       ~ 189 0
14 Z 152-31 G 09 35 26.2841238528 +29 48 45.490357944   15.0       ~ 75 0
15 NGC 3381 GiG 10 48 24.7990862064 +34 42 41.068596852   12.8       ~ 180 0
16 NGC 3811 H2G 11 41 16.6113724536 +47 41 26.982320640   13.0       ~ 182 0
17 NGC 3815 GiG 11 41 39.309 +24 48 01.90   14.2       ~ 98 0
18 NGC 3994 LIN 11 57 36.8662975416 +32 16 39.447161112   13.51 12.87     ~ 207 1
19 Z 157-86 GiC 12 02 03.164 +29 50 53.11   14.3       ~ 109 0
20 NGC 4047 AG? 12 02 50.6855747352 +48 38 10.300035480   12.8       ~ 110 1
21 NGC 4470 H2G 12 29 37.8066943368 +07 49 27.284422224   12.9       ~ 257 0
22 NGC 4644A GiP 12 42 42.6501505728 +55 08 43.928947644   14.8       ~ 85 0
23 NGC 4711 GiC 12 48 45.8623156056 +35 19 57.881064972   14.4       ~ 83 0
24 Z 270-37 LIN 12 59 39.7432926744 +53 20 28.547292984   15.0       ~ 66 0
25 NGC 4961 EmG 13 05 47.5766802528 +27 44 03.247625004   13.5       ~ 196 0
26 NGC 5000 SBG 13 09 47.454 +28 54 25.07   14.0 13.41     ~ 182 1
27 NGC 5016 AGN 13 12 06.6662685192 +24 05 41.945286156   13.180 12.558 12.093 11.547 ~ 171 0
28 NGC 5056 AG? 13 16 12.3107192976 +30 57 01.644570360   13.6       ~ 155 0
29 M 51 Sy2 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 4565 4
30 NGC 5480 AG? 14 06 21.522 +50 43 29.99   12.6       ~ 224 1
31 Z 103-107 GiG 14 10 45.4503942216 +15 12 33.840910116   14.7       ~ 84 0
32 NGC 5520 AGN 14 12 22.8055823616 +50 20 54.479575320   13.3       ~ 141 0
33 NGC 5633 EmG 14 27 28.3616823288 +46 08 47.521403916   13.176 12.932 12.449 11.575 ~ 195 1
34 NGC 5657 H2G 14 30 43.641 +29 10 50.31   14.4       ~ 112 0
35 NGC 5732 AG? 14 40 38.9756466216 +38 38 16.358563788   14.4       ~ 86 0
36 Z 248-18 GiG 14 41 32.0219639160 +44 30 45.962947872   13.59       ~ 114 0
37 Z 220-55 GiG 14 49 01.2057857040 +42 27 49.903129224   15.3       ~ 77 0
38 NGC 5784 GiG 14 54 16.4510371920 +42 33 28.382514552   13.7       ~ 87 0
39 Z 274-29 GiG 15 10 41.008 +55 20 59.32   15.1       ~ 62 0
40 NGC 5930 AGN 15 26 07.9964334517 +41 40 33.691556640   13.0       ~ 441 0
41 NGC 5934 LIN 15 28 12.7256314392 +42 55 47.533609668   14.5       ~ 69 0
42 NGC 5947 AGN 15 30 36.5925666192 +42 43 01.769449836   14.8       ~ 92 0
43 NGC 5953 Sy2 15 34 32.40240 +15 11 37.7990   13.23 12.45     ~ 389 1
44 NGC 5980 GiG 15 41 30.4164434016 +15 47 15.745031088   13.3       ~ 111 0
45 NGC 6004 GiG 15 50 22.7234510328 +18 56 21.333070932   13.4       ~ 107 0
46 IC 1151 AG? 15 58 32.3414987472 +17 26 29.272859340   13.4       ~ 147 0
47 NGC 6060 GiG 16 05 51.9982696320 +21 29 05.766126036   14.3       ~ 114 0
48 Z 167-26 G 16 06 40.18179 +30 05 56.6421   14.4       ~ 126 0
49 IC 1199 AG? 16 10 34.3421521752 +10 02 25.427146092   14.6       ~ 73 0
50 NGC 6155 EmG 16 26 08.3352615552 +48 22 00.410482092   13.20       ~ 125 1
51 NGC 6186 GiG 16 34 25.485 +21 32 27.01   14.2       ~ 109 0
52 Z 225-44 GiG 17 06 52.5409015272 +43 07 20.025272604   15.2       ~ 75 0
53 NGC 6301 GiG 17 08 32.7448601544 +42 20 20.859983448   14.6       ~ 77 0
54 NGC 7738 LIN 23 44 02.0233516093 +00 30 59.758852365   14.4       ~ 112 1

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