2009MNRAS.399..924Z

Query : 2009MNRAS.399..924Z

2009MNRAS.399..924Z - Mon. Not. R. Astron. Soc., 399, 924-933 (2009/October-3)

Star formation properties of isolated blue compact galaxies.

ZITRIN A., BROSCH N. and BILENKO B.

Abstract (from CDS):

We report Hα observations of a sample of very isolated blue compact galaxies (BCGs) located in the direction of large cosmic voids obtained to understand their stellar population compositions, the present star formation (SF) properties and their SF histories (SFHs). Our observations were combined with photometric data from the Sloan Digital Sky Survey (SDSS) and near-infrared data from the Two Micron All Sky Survey (2MASS), wherever such data were available. The combined data sets were compared with predictions of evolutionary synthesis models by Bruzual & Charlot. Current SF rates (SFRs) were determined from the Hα measurements, and simplified SFHs were derived from broad-band and Hα photometry and comparisons with the models.

We found that the SFRs range within 0.1-1.0 M☉/yr, with a median rate of 0.6 M☉/yr. The observed galaxy colours are better explained by the combination of a continuous SF process with a recent instantaneous SF burst, than by a combination of several instantaneous bursts, as has been suggested previously. We compare our results for the SFR of the sample galaxies with that of samples of dwarf galaxies (DGs) in the Virgo cluster (VC) and find that the BCGs have significantly stronger SFRs. The BCGs follow the correlation between Hα emission and starlight found for DGs in the VC and for other BCGs.


Abstract Copyright: © 2009 The Authors. Journal compilation © 2009 RAS

Journal keyword(s): galaxies: evolution - galaxies: formation - galaxies: peculiar - galaxies: starburst

Simbad objects: 42

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Number of rows : 42
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 [PBT2001] SBSG 0335-052 W G 03 37 38.40 -05 02 37.5   19.14     18.85 ~ 110 1
2 SBSG 0335-052 AGN 03 37 44.06 -05 02 40.2     16.65     ~ 500 1
3 LEDA 21915 G 07 50 01.2 +60 00 57   18       ~ 13 0
4 SBSG 0745+601B G 07 50 07.80 +60 02 26.0   18       ~ 2 0
5 SBSG 0749+582 G 07 53 54.00 +58 08 00.0   19       ~ 20 0
6 LEDA 2815847 LIN 08 09 31.8 +60 36 47   18.5       ~ 11 0
7 2MASX J08173762+5202361 PoG 08 17 37.5937178376 +52 02 36.403145124   17.0       ~ 18 0
8 LEDA 2790884 QSO 08 25 55.5166210656 +35 32 31.833368556   18.2       ~ 128 1
9 SDSS J083713.13+360350.4 G 08 37 13.13222 +36 03 50.4887           ~ 9 0
10 SDSS J083723.38+360448.1 G 08 37 23.3784735384 +36 04 48.117710928           ~ 5 0
11 LEDA 87426 G 09 22 32.00596 +36 13 20.6350           ~ 9 0
12 Mrk 1421 H2G 09 42 36.7003697184 +60 52 35.260651812   17.0       ~ 22 0
13 2MASX J09454277+3631064 EmG 09 45 42.7601683200 +36 31 06.776722560   15.80       ~ 10 0
14 LEDA 2793620 G 10 00 18.9402451032 +34 49 01.580221632           ~ 6 0
15 LEDA 2340817 H2G 10 35 08.8859230008 +49 21 42.478010964   17.0       ~ 12 0
16 SBSG 1118+587 G 11 21 35.6 +58 29 29   18.5       ~ 7 0
17 SBSG 1120+586A G 11 23 40.61856 +58 22 41.4945   18.5       ~ 10 0
18 SBSG 1120+586B G 11 23 48.34294 +58 22 05.4952   18.5       ~ 11 0
19 LEDA 35099 G 11 25 15.0 +60 46 59   18.5       ~ 10 0
20 LEDA 2596048 G 12 23 22.9183354416 +59 56 28.007860056   17.5       ~ 13 0
21 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
22 LEDA 2567427 G 12 31 44.53210 +57 32 08.2854   17.5       ~ 13 0
23 LEDA 42164 G 12 37 36.9118687200 +55 41 04.291556892   18.5       ~ 9 0
24 Mrk 246 H2G 13 13 15.9216297960 +56 05 52.550724840   16.0       ~ 19 0
25 LEDA 2816046 G 13 13 57.1785382704 +56 07 36.818086260   17.5       ~ 7 0
26 Z 271-35 EmG 13 22 50.580 +51 44 18.01   15.4       ~ 33 0
27 MCG+10-19-072 Sy2 13 25 53.82030 +57 15 16.0664   15.0       ~ 84 0
28 2MASX J13344486+5944335 H2G 13 34 44.9063770128 +59 44 34.468933848   17.5       ~ 11 0
29 LEDA 214189 G 13 55 35.447 +59 30 41.33   16.5       ~ 20 0
30 LEDA 2816070 H2G 13 56 24.4713180624 +57 45 47.052745956   17.0       ~ 14 0
31 KUG 1408+558 G 14 09 47.1289239624 +55 35 58.465077900   16       ~ 20 0
32 LEDA 2816094 AG? 14 22 38.8346401032 +54 14 09.220979148   18.5       ~ 35 0
33 LEDA 2793641 EmG 14 29 32.6922369288 +33 30 40.604168592   18.07 17.55 17.35 17.06 ~ 15 0
34 SDSS J143218.90+330254.0 AGN 14 32 18.8942185872 +33 02 54.675471516   18.88 18.11 18.02 17.72 ~ 13 0
35 2MASX J14473533+3749074 EmG 14 47 35.3542029600 +37 49 07.666965876           ~ 12 0
36 NAME Bootes Void vid 14 52 +45.8           ~ 91 0
37 2MASX J14584140+5351290 G 14 58 41.3202598344 +53 51 28.492907580   16.5       ~ 13 0
38 SBSG 1527+583 AG? 15 28 34.00235 +58 11 45.9467   18       ~ 8 0
39 SBSG 1541+515 G 15 43 03.3 +51 25 48   18.0       ~ 5 0
40 Z 298-6 G 15 57 55.752 +58 09 39.47   15.1       ~ 20 0
41 AM 1934-563 G 19 38 39 -56 27.3           ~ 15 1
42 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2661 2

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