2017A&A...608A..24R


C.D.S. - SIMBAD4 rel 1.7 - 2021.06.24CEST05:36:19

2017A&A...608A..24R - Astronomy and Astrophysics, volume 608A, 24-24 (2017/12-1)

Extended Schmidt law holds for faint dwarf irregular galaxies.

ROYCHOWDHURY S., CHENGALUR J.N. and SHI Y.

Abstract (from CDS):

Context. The extended Schmidt law (ESL) is a variant of the Schmidt which relates the surface densities of gas and star formation, with the surface density of stellar mass added as an extra parameter. Although ESL has been shown to be valid for a wide range of galaxy properties, its validity in low-metallicity galaxies has not been comprehensively tested. This is important because metallicity affects the crucial atomic-to-molecular transition step in the process of conversion of gas to stars.
Aims. We empirically investigate for the first time whether low metallicity faint dwarf irregular galaxies (dIrrs) from the local universe follow the ESL. Here we consider the "global" law where surface densities are averaged over the galactic discs. dIrrs are unique not only because they are at the lowest end of mass and star formation scales for galaxies, but also because they are metal-poor compared to the general population of galaxies.
Methods. Our sample is drawn from the Faint Irregular Galaxy GMRT Survey (FIGGS) which is the largest survey of atomic hydrogen in such galaxies. The gas surface densities are determined using their atomic hydrogen content. The star formation rates are calculated using GALEX far ultraviolet fluxes after correcting for dust extinction, whereas the stellar surface densities are calculated using Spitzer 3.6 µm fluxes. The surface densities are calculated over the stellar discs defined by the 3.6 µm images.
Results. We find dIrrs indeed follow the ESL. The mean deviation of the FIGGS galaxies from the relation is 0.01dex, with a scatter around the relation of less than half that seen in the original relation. In comparison, we also show that the FIGGS galaxies are much more deviant when compared to the "canonical" Kennicutt-Schmidt relation.
Conclusions. Our results help strengthen the universality of the ESL, especially for galaxies with low metallicities. We suggest that models of star formation in which feedback from previous generations of stars set the pressure in the interstellar medium and affect ongoing star formation, are promising candidates for explaining the ESL. We also confirm that ESL is an independent relation and not a form of a relation between star formation efficiency and metallicity.

Abstract Copyright: © ESO, 2017

Journal keyword(s): galaxies: ISM - galaxies: star formation - galaxies: stellar content - galaxies: dwarf - radio lines: galaxies - ultraviolet: galaxies - ultraviolet: galaxies

Simbad objects: 75

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Number of rows : 75

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11352 1
2 IC 1574 G 00 43 03.82 -22 14 48.8 15.25 14.73 14.35 14.24 14.2 ~ 116 1
3 UGC 685 G 01 07 22.55 +16 41 03.1 15.01 14.55 14.07     ~ 120 0
4 NGC 524 GiP 01 24 47.707 +09 32 19.65   11.5       ~ 432 1
5 M 33 GiG 01 33 50.904 +30 39 35.79 6.17 6.27 5.72     ~ 5311 1
6 M 74 G 01 36 41.772 +15 47 00.46 10.52 10.00 9.46 9.16   ~ 1475 1
7 NGC 925 H2G 02 27 16.913 +33 34 43.97   10.69 10.12 9.55   ~ 716 1
8 NGC 1058 Sy2 02 43 30.0247243235 +37 20 28.807743477   12.29 11.75 10.85   ~ 446 0
9 NGC 2336 GiP 07 27 04.050 +80 10 41.05   13.46 12.51     ~ 226 0
10 NGC 2403 AGN 07 36 51.396 +65 36 09.17 9.31 8.84 8.38 8.19   ~ 1651 1
11 UGC 4305 IG 08 19 04.9878269182 +70 43 13.025604473 12.06 11.72 11.39 11.11   ~ 714 2
12 UGC 4459 GiG 08 34 07.29 +66 10 54.6 15.39 15.03 14.70 14.49   ~ 304 2
13 NGC 2768 SyG 09 11 37.504 +60 02 13.95 11.30 10.84 9.87     ~ 472 2
14 NGC 2841 LIN 09 22 02.655 +50 58 35.32 10.43 10.09 9.22     ~ 1009 1
15 UGC 5139 LSB 09 40 32.33 +71 10 56.0 14.53 14.00 13.66 13.41   ~ 333 1
16 NGC 2976 GiP 09 47 15.458 +67 54 58.97 11.77 11.03 10.16 9.51   ~ 603 1
17 NGC 3032 AGN 09 52 08.1487752500 +29 14 10.423175735   13.87 13.28     ~ 237 0
18 M 81 Sy2 09 55 33.17306143 +69 03 55.0609270   7.89 6.94     ~ 4068 5
19 NGC 3073 GiP 10 00 52.042 +55 37 08.17 14.12 14.07 13.40     ~ 175 2
20 NGC 3077 GiP 10 03 19.0965510921 +68 44 01.556166166 11.23 10.85 10.14 9.74   ~ 704 0
21 UGC 5456 G 10 07 20.182 +10 21 40.16   13.78   13.24   ~ 100 0
22 NGC 3180 GiG 10 18 16.985 +41 25 27.77   10.4       ~ 649 0
23 NGC 3198 EmG 10 19 54.990 +45 32 58.88 10.83 10.87 10.33     ~ 836 1
24 IC 2574 G 10 28 23.6204574649 +68 24 43.441365350 11.70 11.07 10.87 10.74   ~ 618 1
25 NGC 3310 AGN 10 38 45.857 +53 30 11.89   12.45 12.15     ~ 746 1
26 M 95 GiP 10 43 57.69173 +11 42 13.6274 10.71 10.51 9.73 9.48   M0 981 2
27 M 96 GiP 10 46 45.744 +11 49 11.78 10.42 10.15 9.25 8.99   ~ 760 1
28 NGC 3489 GiG 11 00 18.5473550222 +13 54 04.215155077 11.46 11.12 10.29     ~ 368 1
29 NGC 3486 Sy2 11 00 23.946 +28 58 29.35 10.89 11.11 10.53 10.40   ~ 322 1
30 NGC 3521 LSB 11 05 48.5676206040 -00 02 09.228156576 10.06 9.83 9.02 10.1 9.6 ~ 727 2
31 M 66 GiP 11 20 15.026 +12 59 28.64 9.85 9.65 8.92     ~ 1206 4
32 NGC 3631 IG 11 21 02.944 +53 10 09.95   11.0       ~ 332 1
33 NGC 3741 G 11 36 05.754 +45 17 02.96 15.01 14.55 14.23 14.06   ~ 198 0
34 NGC 3773 H2G 11 38 12.967 +12 06 42.91   13.1       ~ 178 0
35 NGC 3893 GiP 11 48 38.207 +48 42 38.84   11.23 10.67     ~ 344 1
36 NGC 3938 GiG 11 52 49.453 +44 07 14.63 10.80 10.90 10.38     ~ 484 1
37 NGC 4150 GiG 12 10 33.655 +30 24 05.35 12.72 12.44 11.64     ~ 288 2
38 NGC 4228 SBG 12 15 39.174 +36 19 36.80 10.63 10.30 9.93 9.74   ~ 883 1
39 MCG+09-20-131 G 12 15 46.626 +52 23 13.91   15.3       ~ 63 0
40 M 99 H2G 12 18 49.625 +14 24 59.36 10.45 10.44 9.87     ~ 798 2
41 M 106 Sy2 12 18 57.620 +47 18 13.39   9.14 8.41 8.11   ~ 2185 3
42 M 61 Sy2 12 21 54.9275149050 +04 28 25.588335799 10.07 10.18 9.65     ~ 905 2
43 M 100 AGN 12 22 54.9318850854 +15 49 20.294302163 10.04 10.05 9.35     ~ 1696 2
44 UGC 7577 GiG 12 27 41.8803124881 +43 29 58.140216428 13.75 13.10 12.7 12.33   ~ 234 0
45 NGC 4449 EmG 12 28 11.118 +44 05 36.81 10.11 9.98 9.64 9.45   ~ 1041 1
46 UGC 7605 GiG 12 28 38.743 +35 43 02.91 15.50 15.12 14.86 14.78   ~ 111 1
47 NGC 4459 H2G 12 29 00.026 +13 58 42.89   11.6       ~ 504 0
48 NGC 4477 Sy2 12 30 02.172 +13 38 11.19 11.98 11.38 10.42     ~ 371 2
49 M 88 Sy2 12 31 59.216 +14 25 13.48   14.33 13.18     ~ 748 1
50 NGC 4526 GiG 12 34 03.029 +07 41 56.90   10.6       ~ 615 1
51 NGC 4535 H2G 12 34 20.310 +08 11 51.94   11.1       ~ 538 0
52 NGC 4550 GiP 12 35 30.612 +12 13 15.44 12.97 12.56 11.68     ~ 512 1
53 NGC 4651 LIN 12 43 42.627 +16 23 36.23   11.30 10.92 10.42 9.84 ~ 475 0
54 NGC 4654 GiP 12 43 56.638 +13 07 34.86   11.8       ~ 517 1
55 NGC 4713 GiG 12 49 57.8808487310 +05 18 40.927534284   12.3       ~ 278 0
56 M 94 SyG 12 50 53.148 +41 07 12.55 9.15 8.96 8.24 7.78   ~ 1262 2
57 UGC 8024 GiC 12 54 05.248 +27 08 58.67 14.37 14.23 13.95 13.84   ~ 551 1
58 M 64 SyG 12 56 43.696 +21 40 57.57   9.36 8.52     ~ 842 2
59 UGC 8091 H2G 12 58 40.1930291852 +14 13 00.737117016 15.24 15.16 14.98 14.81   ~ 445 0
60 NGC 5033 Sy1 13 13 27.535 +36 35 37.14   11.01 12.03 9.73   ~ 811 3
61 M 63 LIN 13 15 49.2738527699 +42 01 45.726078017   9.34 8.59 8.35   ~ 1101 2
62 NGC 5173 GiP 13 28 25.2817718603 +46 35 29.896777764   13.10       ~ 133 1
63 M 51 GiP 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 3939 4
64 M 83 SBG 13 37 00.919 -29 51 56.74 8.85 8.11 7.52 7.21   ~ 2303 2
65 UGC 8638 EmG 13 39 19.348 +24 46 27.77 15.21 14.84 14.46 14.29   ~ 76 0
66 UGC 8651 G 13 39 53.75 +40 44 25.3 15.37 14.56 14.20 14.10   ~ 139 0
67 UGC 8760 G 13 50 51.3121098935 +38 01 14.956142286 15.56 14.78   14.33   ~ 134 0
68 UGC 8833 G 13 54 48.52 +35 50 14.5   16.5   15.20   ~ 101 1
69 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 2627 2
70 UGC 9128 G 14 15 56.70 +23 03 16.2 15.40 14.77 14.41 14.32   ~ 259 0
71 UGC 9562 GiP 14 51 14.3970867139 +35 32 32.933386615   14.2       ~ 149 0
72 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2314 2
73 NGC 7331 LIN 22 37 04.102 +34 24 57.31 10.65 10.35 9.48     ~ 1138 2
74 LEDA 2807157 GiG 23 45 35.177 +38 43 05.09   16.7 15.2     ~ 78 1
75 NGC 7793 GiG 23 57 49.7533807411 -32 35 27.708304655 10.26 9.74 9.28 9.06 9.7 ~ 969 2

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2021.06.24-05:36:19

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