Optical spectroscopy of BL Lac objects: New redshifts and mis-identified sources

被引：28

作者：

Carangelo, N

Falomo, R

Kotilainen, J

Treves, A

Ulrich, MH

机构：

[1] Univ Milano Bicocca, I-20126 Milan, Italy

[2] Osserv Astron Padova, I-35122 Padua, Italy

[3] Univ Turku, Tuorla Observ, Piikkio, Finland

[4] Univ Insubria, I-22100 Como, Italy

[5] European So Observ, ESO Headquarter Garching, D-85748 Garching, Germany

来源：

ASTRONOMY & ASTROPHYSICS | 2003年 / 412卷 / 03期

关键词：

galaxies : BL Lacertae objects : general; galaxies : active; galaxies : quasars : general;

D O I：

10.1051/0004-6361:20031519

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We are carrying out a multi- purpose program of high signal to noise optical spectroscopy at medium resolution of 30 BL Lac objects. Here we report the detection of three new redshifts, and the discovery of three misclassified sources. The new redshifts refer to PKS 0754+ 100 ( z = 0.266), H- 1914- 194 ( z = 0.137) and 1ES0715- 259, for which we derive a redshift of z = 0.465 and also a " new" classification a Steep Spectrum Radio Quasar. In two cases ( UM493 and 1620+ 103) stellar spectra indicate a wrong classification. The three sources with new redshift measurement show strong [ OIII] emission in their spectra and their host galaxy properties are known. The central black hole masses derived using the M-BH - L-bulge and the M-BH- sigma([OIII]) relations are compared.

引用

页码：651 / 655

页数：5

共 45 条

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