The role of K-correction in the classification of BL Lacertae objects

Citation
Yp. Qin et al., The role of K-correction in the classification of BL Lacertae objects, ASTROPHYS L, 40(1-2), 2000, pp. 33-37
Citations number
23
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Space Sciences
Journal title
ASTROPHYSICAL LETTERS & COMMUNICATIONS
ISSN journal
0888-6512 → ACNP
Volume
40
Issue
1-2
Year of publication
2000
Pages
33 - 37
Database
ISI
SICI code
0888-6512(2000)40:1-2<33:TROKIT>2.0.ZU;2-#
Abstract
In this paper, we investigate if K-correction has strong impact on the alph a(ro) - alpha(ox) color-color diagram of BL Lacertae objects and obviously affects the classification of the objects. A sample consisting of the three kinds of the objects, those of low energy peaked BL Lacs (LBLs), high ener gy peaked BL Lacs (HBLs), and intermediate BL Lacs (IBLs), with all the val ues of radio, optical and X-ray fluxes and redshift available for the sourc es, is employed. We calculate the indices alpha(ro), alpha(ox) and alpha(rx ) in both cases of K-correction and no K-correction and compare the results . The results show that: (1) for dividing BL Lacertae objects into three cl asses, LBLs, HBLs and IBLs, the effect of K-correction is negligible; (2) f or classification, only a few of the objects may be affected by the effect.