THE UNIFIED SCHEME OF BL LAC OBJECTS AND THE K-BAND HUBBLE DIAGRAM

Authors
FAN JH OKUDAIRA A LIN RG XIE GZ
Citation
Jh. Fan et al., THE UNIFIED SCHEME OF BL LAC OBJECTS AND THE K-BAND HUBBLE DIAGRAM, Astrophysics and space science, 253(2), 1997, pp. 275-284
Citations number
54
Journal title
Astrophysics and space science → ACNP
ISSN journal
0004640X
Volume
253
Issue
2
Year of publication
1997
Pages
275 - 284
Database
ISI
SICI code
0004-640X(1997)253:2<275:TUSOBL>2.0.ZU;2-1
Abstract
In this paper, the variations of BL Lac objects in the infrared band a re given. The relation between infrared magnitude-K and redshift is di scussed for BL Lac objects, FRI, and FRII(G) radio galaxies. The resul ts show that the faintest optical and infrared magnitudes are correlat ed, the BL Lac objects with large infrared variation have large optica l variation, and the unified scheme of BL Lac objects should include F RI and FRII(G) radio galaxies, which support the results of Xie et at. (1993) and Owen, Ledlow and Keel (1996).