Deep multiband surface photometry on a sample of 24 blue compact galaxies II. A volume-limited sample of 21 emission line galaxies

被引:12
|
作者
Micheva, G. [1 ]
Ostlin, G. [1 ,2 ]
Zackrisson, E. [1 ,2 ]
Bergvall, N. [3 ]
Marquart, T. [1 ,3 ]
Masegosa, J. [4 ]
Marquez, I. [4 ]
Cumming, R. J. [5 ]
Durret, F. [6 ]
机构
[1] Stockholm Univ, Dept Astron, Stockholm Observ, S-10691 Stockholm, Sweden
[2] Stockholm Univ, Dept Astron, Oskar Klein Ctr Cosmoparticle Phys, S-10691 Stockholm, Sweden
[3] Uppsala Univ, Div Astron & Space Phys, S-75120 Uppsala, Sweden
[4] CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain
[5] Chalmers, Onsala Space Observ, Dept Earth & Space Sci, S-43994 Onsala, Sweden
[6] UPMC, CNRS, UMR 7095, Inst Astrophys Paris, F-75014 Paris, France
基金
瑞典研究理事会;
关键词
galaxies: starburst; galaxies: dwarf; galaxies: irregular; galaxies: photometry; CAMPANAS IMAGING ATLAS; STAR-FORMING GALAXIES; DWARF GALAXIES; INTEGRATED PHOTOMETRY; DISTRIBUTIONS; MORPHOLOGY; IMAGES; DECOMPOSITION; CALIBRATION; POPULATION;
D O I
10.1051/0004-6361/201220485
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Aims. We present deep surface photometry of a volume-limited sample of 21 UM emission line galaxies in broadband optical UBVRI and near infrared (NIR) HKs filters. The sample comprises 19 blue compact galaxies (BCGs) and two spirals. Methods. We separated the burst and host populations for each galaxy and compared them to stellar evolutionary models with and without nebular emission contribution. We measured and analyzed the A(180) asymmetry in all filters, the concentration index C, the scale length, and the central surface brightness of the host galaxy. Results. A shift in the average A180 asymmetry is detected from optical to NIR. This shift seems correlated with the morphological class of the BCGs. Using the color-asymmetry relation, we identify five BCGs in the sample as mergers, which is confirmed by their morphological class. Though clearly separated from normal galaxies in the concentration-asymmetry parameter space, we find that it is not possible to distinguish luminous starbursting BCGs from the merely star forming low luminosity BCGs.
引用
收藏
页数:46
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