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New evidence for the unified scheme of BL Lacertae objects and FR I radio galaxies
Bai JM(白金明)1,2; Lee, MG1; Bai, JM (reprint author), Seoul Natl Univ, SEES, Astron Program, Seoul 151742, South Korea.
Source PublicationASTROPHYSICAL JOURNAL
2001-02-10
Volume548Issue:1Pages:244-248
DOI10.1086/318695
Contribution Rank第2完成单位
Indexed BySCI
KeywordBl Lacertae Objects : General Galaxies : Active Radiation Mechanisms : Nonthermal Radio Continuum : Galaxies X-rays : Galaxies
AbstractIn this paper, we collect radio and X-ray observations for most Fanaroff-Riley I (FR I) radio galaxies in the Zirbel-Baum radio galaxy sample and investigate the distribution of the radio-to-X-ray effective spectral index, alpha (rx), to test the unified scheme of BL Lac objects and FR I radio galaxies. It is found that the range of alpha (rx) for FR I radio galaxies is almost the same as that for BL Lac objects, that the distribution of alpha (rx) probably peaks at the same position as BL Lac objects, and that the distribution of alpha (rx) for FR I galaxies is similar to that for BL Lac objects. These suggest that there exist two subclasses of FR I radio galaxies : one is HBL-like, and the other is LBL-like, corresponding to high-energy-peaked (HBL) and low-energy-peaked (LBL) BL Lac objects, respectively. This result is consistent with previous VLA observations and supports the unified scheme of BL Lac objects and FR I radio galaxies.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-637X
URL查看原文
Archive Date2001-02-21
WOS IDWOS:000166939900020
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordACTIVE GALACTIC NUCLEI ; SPECTRAL ENERGY-DISTRIBUTIONS ; SPACE-TELESCOPE OBSERVATIONS ; X-RAY OBSERVATIONS ; PARENT POPULATION ; COMPLETE SAMPLE ; SUPERLUMINAL MOTION ; HST OBSERVATIONS ; VLA OBSERVATIONS ; HOST GALAXIES
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6943
Collection星系研究组
Corresponding AuthorBai, JM (reprint author), Seoul Natl Univ, SEES, Astron Program, Seoul 151742, South Korea.
Affiliation1.Astronomy Program, SEES, Seoul National University, Seoul 151-742, Korea
2.Yunnan Astronomical Observatory, The Chinese Academy of Science, Kunming 650011, China
Recommended Citation
GB/T 7714
Bai JM,Lee, MG,Bai, JM . New evidence for the unified scheme of BL Lacertae objects and FR I radio galaxies[J]. ASTROPHYSICAL JOURNAL,2001,548(1):244-248.
APA Bai JM,Lee, MG,&Bai, JM .(2001).New evidence for the unified scheme of BL Lacertae objects and FR I radio galaxies.ASTROPHYSICAL JOURNAL,548(1),244-248.
MLA Bai JM,et al."New evidence for the unified scheme of BL Lacertae objects and FR I radio galaxies".ASTROPHYSICAL JOURNAL 548.1(2001):244-248.
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