The HST snapshot survey of the B2 sample of low luminosity radio-galaxies: a picture gallery

被引:0
作者
Capetti, A
de Ruiter, HR
Fanti, R
Morganti, R
Parma, P
Ulrich, MH
机构
[1] Osservatorio Astron Torino, I-10025 Pino Torinese, Italy
[2] Osservatorio Astron Bologna, I-40127 Bologna, Italy
[3] Ist Radioastron, I-40129 Bologna, Italy
[4] Univ Bologna, Dipartimento Fis, I-40126 Bologna, Italy
[5] Netherlands Fdn Res Astron, NL-7990 AA Dwingeloo, Netherlands
[6] European So Observ, D-85748 Garching, Germany
关键词
galaxies : active; galaxies : elliptical and lenticular; cD; galaxies : jets; galaxies : nuclei;
D O I
暂无
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
A Hubble Spade Telescope snapshot survey of the B2 sample of low luminosity radio galaxies has, at present, produced V and I images of 41 objects. Together with 16 images of B2 sources taken from the HST archive, there are now high resolution optical data for similar to 57% of the sample. All host galaxies are luminous ellipticals, except one which is a spiral galaxy, while another one turns out to be a misidentification. We present an album of the images of the B2 radio galaxies observed so far, and give a brief description of the optical morphology of the galaxies. Dust features (in the form of disks, lanes or irregular patches) are seen in most of the galaxies of the sample, similar to 58%. Compact optical cores are also very common (18/57). A preliminary analysis has revealed the presence of an optical jet in three objects, indicating they can be detected in a sizeable percentage in these low luminosity radio sources. Brightness profiles of dust-free galaxies are well represented by a Nuker law and all shows the existence of a resolved shallow cusp.
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页码:871 / 885
页数:15
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