2004ApJ...613..914H

Query : 2004ApJ...613..914H

2004ApJ...613..914H - Astrophys. J., 613, 914-932 (2004/October-1)

Star formation in H I-selected galaxies. I. Sample characteristics.

HELMBOLDT J.F., WALTERBOS R.A.M., BOTHUN G.D., O'NEIL K. and DE BLOK W.J.G.

Abstract (from CDS):

A sample of 69 galaxies with radial velocities of less than 2500 km/s was selected from the H I Parkes All-Sky Survey (HIPASS) and imaged in broadband B and R and narrowband Hα, to deduce details about star formation in nearby disk galaxies while avoiding surface brightness selection effects. The sample is dominated by late-type, dwarf disks (mostly Sc and Sm galaxies) with exponential disk scale lengths of ∼1-5 kpc. The HIPASS galaxies, on average, have lower star formation rates (SFRs), are bluer, and have lower surface brightness than an optically selected sample. H II regions were detected in all but one of the galaxies. Many galaxies had as few as two to five H II regions. The galaxies' Hα equivalent widths, colors, and SFRs per unit of H I mass are best explained by young mean ages (∼3-5 Gyr, according to Schmidt-law models) with star formation histories in which the SFRs were higher in the past. Comparison of the surface brightness coverage of the HIPASS galaxies with that of an optically selected sample shows that such a sample may miss ∼10% of the local galaxy number density and could possibly miss as much as 3%-4% of the SFR density. The amount lower surface brightness galaxies contribute to the total luminosity density may be insignificant, but this conclusion is somewhat dependent on how the fluxes of these objects are determined.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: ISM - Galaxies: Photometry - Galaxies: Stellar Content

VizieR on-line data: <Available at CDS (J/ApJ/613/914): table1.dat table4.dat table5.dat table6.dat>

Simbad objects: 77

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Number of rows : 77
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 ESO 79-5 AG? 00 40 44.4831496008 -63 26 25.213507728   13.74   12.76 13.2 ~ 58 0
2 CD-34 239 PM* 00 41 30.4739854200 -33 37 32.030888686 13.138 11.969 10.525 9.619 8.741 K9V 116 0
3 ESO 79-7 EmG 00 50 04.120 -66 33 09.90   13.72   12.80 13.4 ~ 48 0
4 NGC 406 G 01 07 25.060 -69 52 45.27   13.02   12.14 12.0 ~ 91 0
5 ESO 13-16 AG? 01 32 48.12 -79 28 27.6   13.53   12.52 13.3 ~ 50 0
6 ESO 80-6 AG? 01 47 16.87 -62 58 14.8   14.41   13.79 14.3 ~ 20 0
7 CD-28 595 PM* 01 54 50.2703221766 -27 28 35.739139915   12.06 11.51     ~ 138 0
8 NGC 802 AG? 01 59 05.9571021576 -67 52 12.129960216   14.17   13.32 13.6 ~ 38 0
9 PG 0231+051 WD* 02 33 41.3574299856 +05 18 43.649856216 14.562 15.776 16.096 16.267 16.639 DAO.6 149 0
10 NGC 1313 AG? 03 18 16.046 -66 29 53.74   10.06 10.0 9.40 10.4 ~ 723 2
11 LP 995-86 Pe* 03 48 22.6125679056 -39 08 37.013680104   13.61 13.15     F 104 0
12 GD 50 WD* 03 48 50.1859724280 -00 58 32.290187664 12.596 13.787 14.063 14.210 14.388 DA1.2 272 1
13 ESO 54-21 AG? 03 49 49.445 -71 38 07.38   12.98   11.64 12.0 ~ 65 0
14 IC 2051 AG? 03 52 00.7563634728 -83 49 50.582319276   12.32   10.89 11.6 ~ 74 0
15 NGC 1511 G 03 59 36.98373 -67 38 03.3430   11.97   10.74 11.1 ~ 158 1
16 NGC 1559 GiG 04 17 35.7508602240 -62 47 01.251567384   11.19 10.45 10.11 10.4 ~ 325 1
17 ESO 84-40 AG? 04 44 59.53 -62 42 22.2   15.01   14.42 14.4 ~ 14 0
18 ESO 119-16 AG? 04 51 29.07 -61 38 59.8 15.28 14.98 14.58 14.38 14.0 ~ 52 0
19 ESO 85-14 AG? 04 54 43.164 -62 48 02.10   13.42   12.57   ~ 40 0
20 ESO 85-30 GiG 05 01 29.6998042104 -63 17 35.786160312   13.78   12.9 12.7 ~ 51 0
21 NGC 1809 GiG 05 02 05.008 -69 34 05.82   12.1   11.3 11.4 ~ 69 0
22 ESO 4-17 AG? 05 04 29.36 -87 01 45.0   15.97   15.55 16.9 ~ 17 0
23 ESO 85-47 AG? 05 07 42.9990 -62 59 29.906   14.57   13.56 14.2 ~ 42 0
24 NGC 1892 GiG 05 17 09.0127062984 -64 57 34.791231996   12.72   11.9 11.8 ~ 81 0
25 NGC 2082 GiG 05 41 51.0901098120 -64 18 03.828857148   12.79   11.45 11.6 ~ 101 0
26 ESO 86-60 AG? 06 08 09.0488 -63 35 10.297   15.97   15.35 15.0 ~ 11 0
27 LEDA 271582 G 06 35 11.8 -70 51 52   16.0   16.1 15.9 ~ 7 0
28 HIPASS J0653-73 AG? 06 53 51.8264 -73 42 26.532           ~ 10 0
29 NGC 2397A EmG 07 21 07.9147247592 -69 06 55.120935276   14.84   13.87 14.1 ~ 23 0
30 ESO 35-9 AG? 07 28 40.60 -75 03 20.0   16.03   15.03 15.0 ~ 15 0
31 ESO 59-1 AG? 07 31 18.20 -68 11 16.8   13.74   12.80 13.7 ~ 81 1
32 ESO 17-2 AG? 07 32 22.1076312696 -77 55 09.349761936   14.72   13.39 13.6 ~ 21 0
33 NGC 2442 LIN 07 36 23.7700545576 -69 31 50.997856332 11.47 11.15 10.42 9.71 10.4 ~ 243 1
34 ESO 35-18 Sy2 07 55 04.182 -76 24 45.19   14.08   12.45 13.1 ~ 56 0
35 ESO 35-20 AG? 08 03 17.1780 -77 04 23.043   15.81   14.59 14.7 ~ 16 0
36 ESO 35-21 AG? 08 09 55.49 -74 30 41.8   17.16   16.08 15.1 ~ 13 0
37 ESO 60-3 EmG 08 16 33.486 -71 51 31.88   15.25   14.36   ~ 13 0
38 ESO 60-7 AG? 08 27 26.50 -71 04 19.3   16.77   16.03   ~ 9 0
39 ESO 90-4 AG? 08 38 37.10 -64 20 32.0   14.2   14.3 14.4 ~ 12 0
40 ESO 36-6 AG? 08 38 47.2461 -75 09 17.339   14.19   13.71 13.6 ~ 21 0
41 ESO 60-19 AG? 08 57 26.741 -69 03 36.13   12.79   11.92 12.0 ~ 54 0
42 NGC 2788B G 09 03 37.2 -67 57 59   14.51   13.64   ~ 21 0
43 NGC 2836 AG? 09 13 44.9698 -69 19 59.039   12.64   12.01 12.5 ~ 17 0
44 ESO 91-7 GiG 09 17 31.099 -62 53 04.13   13.85   12.94 13.1 ~ 27 0
45 NGC 2915 AG? 09 26 11.532 -76 37 34.75 13.13 12.93 12.68 11.90 12.8 ~ 371 2
46 ESO 37-4 AG? 09 32 37.51 -74 15 16.1   16.69       ~ 9 0
47 NGC 3059 EmG 09 50 08.181 -73 55 19.96   11.56 11.24 10.66 11.5 ~ 113 1
48 ESO 61-17 AG? 09 52 33.37 -69 03 54.4   14.81   14.01 14.8 ~ 10 0
49 ESO 92-6 GiG 10 03 18.6226083504 -64 58 02.790826068   13.45   12.47 13.1 ~ 33 0
50 NGC 3136A AG? 10 03 32.58 -67 26 54.5   15.60   14.79 14.3 ~ 16 0
51 ESO 37-10 EmG 10 04 17.1946355280 -75 28 44.036845176   13.15   12.14 12.6 ~ 29 0
52 IC 2554 AG? 10 08 50.563 -67 01 51.07   12.43 13.20 11.24 11.9 ~ 66 0
53 ESO 92-21 GiG 10 21 05.5193421384 -66 29 31.097169744   13.89   13.5 13.3 ~ 32 0
54 ESO 37-15 AG? 10 25 43.1233 -76 30 13.124   16.41   14.5 14.8 ~ 12 0
55 HIPASS J1039-71 G 10 39 40.00 -71 55 23.0           ~ 2 0
56 ESO 19-4 AG? 10 48 49.25 -80 14 12.8   15.4   15.3 15.2 ~ 10 0
57 ESO 38-11 AG? 11 20 58.10 -75 52 45.4           ~ 5 0
58 LAWD 37 WD* 11 45 42.9169346379 -64 50 29.461957832 11.08 11.725 11.513 11.34 11.163 DQ 287 0
59 IC 3104 AG? 12 18 46.06 -79 43 33.9   13.65 12.8 12.04   ~ 93 1
60 NGC 5068 AG? 13 18 54.807 -21 02 20.76 11.24 10.53 10.01 9.78 10.1 ~ 354 0
61 ESO 21-3 AG? 13 32 27.29 -80 25 56.5   13.6   13.2 13.2 ~ 22 0
62 M 83 SBG 13 37 00.91920 -29 51 56.7400 8.85 8.11 7.52 7.21   ~ 2778 2
63 PG 1525-071 HS* 15 28 11.5771773672 -07 16 32.899212840 13.658 14.85 14.89 15.14 15.197 sdO 42 0
64 CD-28 11464 Pe* 15 38 59.6479538952 -28 35 36.973634856   12.310 11.797 11.794   A 121 0
65 NGC 6300 Sy2 17 16 59.5418094960 -62 49 13.946588832   10.88 13.08 9.44 10.2 ~ 478 1
66 IC 4662 bCG 17 47 09.192 -64 38 19.25   11.75 11.1 10.45   ~ 253 4
67 NGC 6438A AG? 18 22 35.49 -85 24 22.8   12.57   11.40   ~ 26 0
68 ESO 140-19 AG? 18 22 46.3462 -62 16 22.777   16.59   15.0 15.7 ~ 21 0
69 IC 4710 AG? 18 28 37.969 -66 58 56.20   12.53   11.33 12.4 ~ 112 1
70 ESO 104-22 LSB 18 55 41.2 -64 48 39   15.62   14.67 13.1 ~ 35 0
71 IC 4870 AGN 19 37 37.5995314008 -65 48 42.669480564   13.92 14.63 12.77 13.1 ~ 73 0
72 IC 5028 AG? 20 43 22.03 -65 38 52.1   15.24   14.83 15.1 ~ 17 0
73 NGC 7098 AG? 21 44 16.1497974000 -75 06 40.864242528   12.33 11.37 10.84 11.5 ~ 88 0
74 NGC 7095 GiP 21 52 26.5174422024 -81 31 51.109094280   12.22   11.08 12.4 ~ 70 1
75 IC 5176 Sy2 22 14 55.928 -66 50 57.88   13.54   11.97 12.4 ~ 109 0
76 ESO 27-21 Sy1 23 04 18.9937979760 -79 27 57.322508292   13.95   12.81 13.8 ~ 41 0
77 NGC 7661 AG? 23 27 14.28 -65 16 20.9   14.11   13.16 13.6 ~ 47 0

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