2013A&A...558A..18F


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST13:46:45

2013A&A...558A..18F - Astronomy and Astrophysics, volume 558A, 18-18 (2013/10-1)

Extremely metal-poor galaxies: the H I content.

FILHO M.E., WINKEL B., SANCHEZ ALMEIDA J., AGUERRI J.A., AMORIN R., ASCASIBAR Y., ELMEGREEN B.G., ELMEGREEN D.M., GOMES J.M., HUMPHREY A., LAGOS P., MORALES-LUIS A.B., MUNOZ-TUNON C., PAPADEROS P. and VILCHEZ J.M.

Abstract (from CDS):

Extremely metal-poor (XMP) galaxies are chemically, and possibly dynamically, primordial objects in the local Universe. Our objective is to characterize the HI content of the XMP galaxies as a class, using as a reference the list of 140 known local XMPs compiled by Morales-Luis et al. (2011ApJ...743...77M). We have observed 29 XMPs, which had not been observed before at 21cm, using the Effelsberg radio telescope. This information was complemented with HI data published in literature for a further 53 XMPs. In addition, optical data from the literature provided morphologies, stellar masses, star-formation rates and metallicities. Effelsberg HI integrated flux densities are between 1 and 15Jy.km/s, while line widths are between 20 and 120km/s. HI integrated flux densities and line widths from literature are in the range 0.1-200Jy.km/s and 15-150km/s, respectively. Of the 10 new Effelsberg detections, two sources show an asymmetric double-horn profile, while the remaining sources show either asymmetric (seven sources) or symmetric (one source) single-peak 21cm line profiles. An asymmetry in the HI line profile is systematically accompanied by an asymmetry in the optical morphology. Typically, the g-band stellar mass-to-light ratios are ∼0.1, whereas the HI gas mass-to-light ratios may be up to two orders of magnitude larger. Moreover, HI gas-to-stellar mass ratios fall typically between 10 and 20, denoting that XMPs are extremely gas-rich. We find an anti-correlation between the HI gas mass-to-light ratio and the luminosity, whereby fainter XMPs are more gas-rich than brighter XMPs, suggesting that brighter sources have converted a larger fraction of their HI gas into stars. The dynamical masses inferred from the HI line widths imply that the stellar mass does not exceed 5% of the dynamical mass, while the HI mass constitutes between 20 and 60% of the dynamical mass. Furthermore, the dark matter mass fraction spans a wide range, but can account, in some cases, for over 65% of the dynamical mass. XMPs are found to be outliers of the mass - and luminosity - metallicity relation, whereby they lack metals for their estimated dynamical mass and luminosity, suggesting the presence of pristine gas. However, they generally follow the luminosity - and baryonic mass Tully-Fisher relation, indicating that the HI gas is partly virialized and contains some rotational support. 60% of the XMP sources show a small velocity offset (10-40km/s) between the HI gas and the stellar/nebular component, implying that, in these sources, the HI gas is not tightly coupled to the stars and ionized gas. The effective yields provided by oxygen are often larger than the standard theoretical yields, suggesting that the observed HI gas is relatively metal-free. 80% of the XMP sources present asymmetric optical morphology - 60 XMPs show cometary structure, 11 show two bright star-forming knots and 18 show multiple star-forming regions. Star-formation rates are found to be similar to those typically found in BCDs. However, specific star-formation rates are high, with timescales to double their stellar mass, at the current rate, of typically less than 1Gyr. XMP galaxies are among the most gas-rich objects in the local Universe. The observed HI component suggests kinematical disruption and hints at a primordial composition.

Abstract Copyright:

Journal keyword(s): galaxies: fundamental parameters - radio lines: galaxies - techniques: spectroscopic

VizieR on-line data: <Available at CDS (J/A+A/558/A18): table1.dat refs.dat table2.dat sp/* table3.dat>

Simbad objects: 146

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Number of rows : 146

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 UGC 12894 G 00 00 22.55 +39 29 43.5   17       ~ 32 0
2 [GPM2009] J0004+0025 1 EmG 00 04 21.6 +00 25 36           ~ 3 0
3 [GPM2009] J0014-0044 1 EmG 00 14 28.8 -00 44 44           ~ 4 0
4 UGC 139 EmG 00 14 31.872 -00 44 15.63   14.80   14.1 13.8 ~ 89 0
5 [GPM2009] J0015+0104 LSB 00 15 20.679 +01 04 36.99           ~ 10 0
6 SDSS J001628.25+010801.9 G 00 16 28.254 +01 08 01.92           ~ 4 0
7 HS 0017+1055 G 00 20 21.0 +11 12 21           ~ 16 0
8 SDSS J002904.70-010825.9 G 00 29 04.706 -01 08 25.96           ~ 3 0
9 SDSS J002949.49-002539.8 G 00 29 49.497 -00 25 39.89           ~ 3 0
10 ESO 473-24 G 00 31 23.1 -22 46 02   16.11   15.87 17.7 ~ 50 1
11 SDSS J003630.40+005234.7 G 00 36 30.411 +00 52 34.78           ~ 3 0
12 NAME Andromeda IV G 00 42 32.3 +40 34 19           ~ 75 0
13 [GPM2009] 0057-0022 G 00 57 12.603 -00 21 57.67           ~ 4 0
14 IC 1613 GiC 01 04 54.2 +02 08 00   10.42 10.01 9.77   ~ 1106 2
15 SDSS J010750.81+000128.3 G 01 07 50.817 +00 01 28.42           ~ 3 0
16 LEDA 166061 G 01 08 21.96 -38 12 34.4           ~ 23 0
17 UGC 772 LSB 01 13 40.450 +00 52 39.16   17       ~ 55 0
18 SHOC 61 H2G 01 19 14.283 -09 35 46.23           ~ 15 0
19 UGC 993 H2G 01 25 34.1909531716 +07 59 24.711767380   15.6       ~ 37 0
20 [GPM2009] J0126-0038 2 EmG 01 26 46.4 -00 38 39           ~ 3 0
21 SDSS J013352.55+134209.5 EmG 01 33 52.555 +13 42 09.53           ~ 16 0
22 [GPM2009] J0135-0023 G 01 35 44.041 -00 23 16.67           ~ 6 0
23 3C 48 QSO 01 37 41.2995845985 +33 09 35.079126038   16.62 16.20     ~ 2495 2
24 UGCA 20 bCG 01 43 14.6 +19 58 51   16       ~ 49 0
25 MCG+01-05-030 H2G 01 44 41.3 +04 53 26 15.07 15.50 15.16 14.86 14.58 ~ 79 0
26 LEDA 7422 EmG 01 58 09.388 -00 06 37.22           ~ 29 0
27 LEDA 166065 G 02 00 10.2 +28 49 53   17.2       ~ 49 0
28 LEDA 7896 G 02 04 25.598 -10 09 35.01   17       ~ 15 0
29 MCG-02-06-026 G 02 05 49.081 -09 49 17.62   15.14   16.77 15.2 ~ 31 0
30 SDSS J021629.25+011521.2 G 02 16 29.263 +01 15 21.19           ~ 1 0
31 [GPM2009] 096632 EmG 02 51 47.5 -30 06 32           ~ 3 0
32 SDSS J025428.94+003550.4 G 02 54 28.94 +00 35 50.4           ~ 5 0
33 [GPM2009] J0301-0059 1 EmG 03 01 26.3 -00 59 26           ~ 4 0
34 SDSS J030149.01-005257.4 EmG 03 01 49.026 -00 52 57.39           ~ 9 0
35 SDSS J030331.27-010947.1 G 03 03 31.270 -01 09 47.11           ~ 4 0
36 SDSS J031300.04+000612.1 EmG 03 13 00.046 +00 06 12.17           ~ 4 0
37 SDSS J031301.60+001040.2 G 03 13 01.57 +00 10 40.3           ~ 3 0
38 [GPM2009] J0315-0024 1 EmG 03 15 59.9 -00 24 26           ~ 3 0
39 UGC 2684 G 03 20 23.71 +17 17 45.1   18       ~ 69 0
40 [PBT2001] SBSG 0335-052 W G 03 37 38.40 -05 02 37.5   19.14     18.85 ~ 98 1
41 SBSG 0335-052B G 03 37 44.04 -05 02 40.2   16.77 16.65   16.79 ~ 148 1
42 [GPM2009] J0338+0013 EmG 03 38 12.2 +00 13 13           ~ 4 0
43 [GPM2009] J0341-0026 1 EmG 03 41 18.1 -00 26 28           ~ 2 0
44 ESO 358-60 GiC 03 45 12.14 -35 34 15.3   15.86   15.46 16.6 ~ 59 0
45 6dFGS gJ040520.4-364859 G 04 05 20.4 -36 48 59           ~ 7 0
46 [GPM2009] J0519+0007 G 05 19 02.6953532514 +00 07 29.106797166           ~ 21 0
47 ICRF J054236.1+495107 Sy1 05 42 36.13789843 +49 51 07.2337251   18.45 17.80 17.210   ~ 1266 1
48 SCHG 0618-402 H2G 06 20 03.8353 -40 16 42.997           ~ 25 0
49 ESO 489-56 G 06 26 17.8 -26 15 58   16.69   16.28 15.0 ~ 51 0
50 SDSS J080840.84+172856.4 G 08 08 40.8471610119 +17 28 56.453019222           ~ 6 0
51 SDSS J081239.53+483645.2 G 08 12 39.532 +48 36 45.27           ~ 17 0
52 UGC 4305 IG 08 19 04.9878269182 +70 43 13.025604473 12.06 11.72 11.39 11.11   ~ 689 2
53 SDSS J082540.44+184617.2 EmG 08 25 40.449 +18 46 17.21           ~ 5 0
54 LEDA 2790884 bCG 08 25 55.521 +35 32 31.96   18.2       ~ 102 1
55 UGC 4459 GiG 08 34 07.29 +66 10 54.6 15.39 15.03 14.70 14.49   ~ 290 2
56 UGC 4483 GiG 08 37 03.29 +69 46 29.2 15.70 15.46 14.98 14.89   ~ 265 0
57 LEDA 24384 Sy1 08 40 29.9132803308 +47 07 10.244168570   18.2       ~ 59 0
58 SDSS J084236.57+103313.9 EmG 08 42 36.5862404029 +10 33 13.907103972           ~ 16 0
59 LEDA 2790886 EmG 08 49 40.332 +35 11 37.91   19.0       ~ 9 0
60 SDSS J085947.03+392302.6 GiP 08 59 47.040 +39 23 02.67           ~ 8 0
61 SDSS J091028.77+071117.9 H2G 09 10 28.776 +07 11 17.97           ~ 7 0
62 SDSS J091159.42+313535.9 G 09 11 59.434 +31 35 35.92           ~ 9 0
63 SDSS J092609.45+334304.1 LSB 09 26 09.448 +33 43 04.13           ~ 21 0
64 Mrk 116 PaG 09 34 02.1 +55 14 25           ~ 996 1
65 LEDA 27591 SBG 09 40 12.843 +29 35 30.30   16 16.08     ~ 41 0
66 SDSS J094254.27+340411.9 EmG 09 42 54.274 +34 04 11.96           ~ 6 0
67 MCG+00-25-010 Sy1 09 44 01.8782156203 -00 38 32.011388330   15.5       ~ 47 0
68 SBSG 0940+544N G 09 44 16.70 +54 11 33.0           ~ 26 0
69 LEDA 27886 QSO 09 44 17.101 +54 11 28.83   19.5       ~ 64 0
70 UGC 5340 G 09 56 46.047 +28 49 43.77 14.82 14.74 14.59 14.55   ~ 181 1
71 NAME Leo Dwarf Irregular Galaxy G 09 59 26.46 +30 44 47.0 14.08 13.54 13.26 13.33   ~ 547 0
72 NAME Sextans B H2G 10 00 00.8201300945 +05 20 09.572530884 12.77 12.25 11.89 11.71   ~ 467 0
73 LEDA 2790903 EmG 10 03 48.664 +45 04 57.65   17.7       ~ 10 0
74 NAME Sex A H2G 10 11 00.5 -04 41 30 12.48 12.13 11.93 11.78   ~ 652 2
75 LEDA 29998 EmG 10 16 24.516 +37 54 45.96   16.5       ~ 34 0
76 2MASS J10253030+1402078 Sy1 10 25 30.2915316274 +14 02 07.394686616   20.59 19.77     ~ 6 0
77 Mrk 32 G 10 27 01.745 +56 16 14.31   16.5       ~ 32 0
78 SDSS J103137.28+043422.0 G 10 31 37.28 +04 34 22.0           ~ 3 0
79 LEDA 2302764 EmG 10 36 25.010 +47 41 53.69   18.5       ~ 13 0
80 [ITS2007] 52339-578-60 EmG 10 44 57.797 +03 53 13.15           ~ 28 0
81 LEDA 2147507 EmG 11 02 10.0 +39 18 47   18.20 17.7     ~ 9 0
82 MCG+10-16-059 G 11 05 53.674 +60 22 29.07   16       ~ 19 0
83 NAME Arp's Galaxy G 11 19 34.344 +51 30 12.17   17.3       ~ 58 0
84 SDSS J112152.80+032421.2 G 11 21 52.888 +03 24 21.19           ~ 7 0
85 UGC 6456 bCG 11 28 00.43 +78 59 38.4   14.50       ~ 305 1
86 MCG+10-17-011 G 11 32 02.622 +57 22 36.69   17       ~ 46 1
87 LEDA 2368928 H2G 11 45 06.261 +50 18 02.40           ~ 10 0
88 2dFGRS TGN242Z154 G 11 51 32.935 -02 22 22.02   16.234   15.676   ~ 8 0
89 LEDA 37102 Sy1 11 51 33.3534243441 -02 22 21.893770899   17       ~ 143 0
90 LEDA 2543081 LSB 11 57 54.213 +56 38 16.77           ~ 15 0
91 EVCC 79 EmG 12 01 22.3048965246 +02 11 08.573863810           ~ 27 0
92 LEDA 2815986 G 12 02 02.493 +54 15 51.05   18.0       ~ 63 0
93 LEDA 39055 EmG 12 14 02.479 +53 45 17.35   18       ~ 68 0
94 MCG+09-20-131 G 12 15 46.626 +52 23 13.91   15.3       ~ 60 0
95 LEDA 39402 H2G 12 17 17.093 -28 02 32.67   17       ~ 123 0
96 LEDA 39845 GiC 12 20 40.280 +13 53 22.41   17.5       ~ 42 0
97 LEDA 101471 EmG 12 24 36.7369432538 +37 24 35.833921444           ~ 27 0
98 ESO 380-27 H2G 12 25 46.9 -36 14 01   17.47   16.52   ~ 97 1
99 RMB 132 bCG 12 30 48.6089666709 +12 02 42.805687186     16.78   16.44 ~ 84 0
100 CAIRNS J123718.50+291454.7 EmG 12 37 18.50 +29 14 54.7   19.91 19.78     ~ 12 0
101 NAME CVn I dwA GiC 12 38 40.1 +32 45 59 16.91 16.66 16.73 16.62   ~ 192 0
102 2MASX J12390403+3920437 H2G 12 39 04.039 +39 20 43.42   18.7       ~ 21 0
103 SDSS J123944.58+145612.8 G 12 39 44.58 +14 56 12.8           ~ 4 0
104 LEDA 2790846 EmG 12 51 52.4 +49 03 25   18.0       ~ 47 0
105 2QZ J125526.0-021334 Sy1 12 55 26.0734165941 -02 13 34.099359925     19.46     ~ 5 0
106 UGC 8091 H2G 12 58 40.1930291852 +14 13 00.737117016 15.24 15.16 14.98 14.81   ~ 437 0
107 KISS F1312-2143 EmG 13 13 16.4 +44 02 30           ~ 11 0
108 UGC 8308 G 13 13 22.839 +46 19 21.71   17       ~ 116 1
109 LEDA 169741 H2G 13 21 19.704 +32 08 25.17   19.123       ~ 21 0
110 2QZ J132347.5-013252 EmG 13 23 47.4577651938 -01 32 52.017047577           ~ 29 0
111 SDSS J132723.28+402204.1 EmG 13 27 23.285 +40 22 04.18           ~ 6 0
112 [ITS2007] 53091-1464-370 EmG 13 31 26.9314935198 +41 51 48.243222519           ~ 9 0
113 ESO 577-27 EmG 13 42 46.8 -19 34 54   16.42   16.16   ~ 16 0
114 SDSS J135525.66+465151.3 EmG 13 55 25.6597273321 +46 51 51.388708941           ~ 6 0
115 2dFGRS TGN206Z232 G 14 14 54.149 -02 08 22.92   18.065   17.598   ~ 17 0
116 MCG+07-29-060 QSO 14 17 01.716 +43 30 13.52   15.6       ~ 152 0
117 SDSS J141851.12+210239.6 EmG 14 18 51.1297049064 +21 02 39.963910119           ~ 10 0
118 SDSS J142250.72+514516.5 G 14 22 50.72 +51 45 16.5           ~ 4 0
119 [MWC2015] B1422+231 21070 AGN 14 23 42.8683150858 +22 57 28.791937071           ~ 11 0
120 SDSS J144158.31+291434.2 G 14 41 58.32 +29 14 34.2           ~ 4 0
121 UGC 9497 H2G 14 44 12.8032800372 +42 37 43.773570223   16.0       ~ 60 0
122 LEDA 101527 EmG 15 09 34.174 +37 31 46.12   17.9       ~ 23 0
123 KISSB 186 SBG 15 15 42.5 +29 01 40   19.83 19.42     ~ 13 0
124 KISS F1615-4535 SBG 16 16 38.894 +29 03 32.46   17.79 17.38     ~ 14 0
125 SDSS J164402.63+273405.4 G 16 44 02.631 +27 34 05.47           ~ 3 0
126 [ITS2007] 53149-1570-21 H2G 16 47 10.663 +21 05 14.50           ~ 8 0
127 WISEP J170233.53+180306.4 IR 17 02 33.534 +18 03 06.44   18.39       ~ 4 0
128 LEDA 2790946 EmG 17 05 45.315 +43 28 49.59   18.1       ~ 11 0
129 NAME Sgr dIG G 19 29 59.0 -17 40 41   15.5 13.6     ~ 275 1
130 SDSS J205312.59+003914.2 G 20 53 12.597 +00 39 14.25           ~ 5 0
131 SDSS J210455.31-003522.3 G 21 04 55.310 -00 35 22.38           ~ 26 0
132 [GPM2009] J2105+0032 1 EmG 21 05 08.6 +00 32 23           ~ 2 0
133 NGC 7027 PN 21 07 01.8 +42 14 10   9.1 10.9     ~ 2322 1
134 2SLAQ J212025.93-005826.5 G 21 20 25.940 -00 58 26.35           ~ 5 0
135 HS 2134+0400 bCG 21 36 58.95 +04 14 04.1           ~ 11 0
136 SDSS J215031.95+003305.1 G 21 50 31.957 +00 33 05.07           ~ 4 0
137 ESO 146-14 G 22 13 00.0 -62 04 05   15.17   14.77 14.1 ~ 66 0
138 2dFGRS TGS116Z004 G 22 13 26.1 -25 26 43   18.282   18.182   ~ 4 0
139 [GPM2009] PHL293B EmG 22 30 36.8 -00 06 37           ~ 15 1
140 2dFGRS TGS258Z058 G 22 37 02.29 -28 52 43.7   19.218   19.141   ~ 4 0
141 HS 2236+1344 bCG 22 38 31.1190793853 +14 00 29.769874980           ~ 33 0
142 SDSS J225059.27+000032.8 G 22 50 59.27 +00 00 32.9           ~ 3 0
143 SDSS J225900.86+141343.5 G 22 59 00.86 +14 13 43.5           ~ 4 0
144 EQ J2302+0049 EmG 23 02 09.989 +00 49 39.07           ~ 14 0
145 [GPM2009] J2354-0005 1 EmG 23 54 37.3 -00 05 02           ~ 2 0
146 SDSS J235437.31-000501.6 G 23 54 37.314 -00 05 01.60           ~ 3 0

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2020.07.04-13:46:45

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