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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.
发表期刊ASTROPHYSICAL JOURNAL
2001-02-10
卷号548期号:1页码:244-248
DOI10.1086/318695
产权排序第2完成单位
收录类别SCI
关键词Bl Lacertae Objects : General Galaxies : Active Radiation Mechanisms : Nonthermal Radio Continuum : Galaxies X-rays : Galaxies
摘要In 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.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-637X
URL查看原文
归档日期2001-02-21
WOS记录号WOS:000166939900020
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]ACTIVE 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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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6943
专题星系研究组
通讯作者Bai, JM (reprint author), Seoul Natl Univ, SEES, Astron Program, Seoul 151742, South Korea.
作者单位1.Astronomy Program, SEES, Seoul National University, Seoul 151-742, Korea
2.Yunnan Astronomical Observatory, The Chinese Academy of Science, Kunming 650011, China
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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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