Effects of redshift on the classifying criteria of BL lacertae objects

	Effects of redshift on the classifying criteria of BL lacertae objects
	Ma L(马力)1,3 ; Chen LE(陈洛恩)2,3 ; Xie GZ(谢光中)3,4 ; Ren, JY 2; Xie, ZH 1; Zhou SB(周曙白)3,4 ; Wu, H 1; Mei, DC4
刊名	CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
	2007
卷号	7 期号:3 页码:345-352
关键词	galaxies : BL Lacertae objects : general galaxies : fundamental parameter galaxies : high-redshift
ISSN号	1009-9271
通讯作者	Ma, L (reprint author), Yunnan Normal Univ, Dept Phys, Kunming 650092, Peoples R China.
产权排序	第三完成单位
英文摘要	We have collected a sample of 70 BL Lacs (33 radio-selected BL Lacs and 37 X-ray selected BL Lacs) with multi-waveband data for investigating the classifying criteria of BL Lacertae Objects. For each source, we estimate its luminosities in radio, optical and X-ray, the broad-band spectral index from radio to X-ray and the peak frequency' of the synchrotron emission, and make a statistical analysis of the data obtained. Our main results are as follows: (1) The broad-band spectral index and the peak frequency have no correlation with the redshift, while they are inversely correlated with each other and they could be regarded as equivalent classifying criteria of BL Lac objects. (2) There are significant effects of the luminosity/redshift relation on the observed luminosity distribution in our sample, hence, if the radio luminosity is to be used as a classifying criterion of BL Lac objects, it should not be regarded as equivalent to the broad-band spectral index or the peak frequency. (3) Our results supply a specific piece of evidence for the suggestion that the use of luminosities always introduces a redshift bias to the data and show that the location of the peak frequency is not always linked to the luminosity of any wave band.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	SPECTRAL ENERGY-DISTRIBUTIONS ; ACTIVE GALACTIC NUCLEI ; X-RAY-SPECTRA ; ROSAT OBSERVATIONS ; CLASSIFICATORY CRITERIA ; LOUD BLAZARS ; RADIO ; LUMINOSITIES ; CONNECTION ; FREQUENCY
收录类别	SCI
原文出处	http://iopscience.iop.org/1009-9271/7/3/03/
语种	英语
WOS记录号	WOS:000247553300003
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/7030]
专题	云南天文台_星系研究组
作者单位	1.Department of Physics, Yunnan Normal University, Kunming 650092 2.Department of Physics, Yuxi Normal College, Yuxi 653100 3.National Astronomical Observatories/ Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011 4.Department of Physics, Yunnan University, Kunming 650091
推荐引用方式 GB/T 7714	Ma L,Chen LE,Xie GZ,et al. Effects of redshift on the classifying criteria of BL lacertae objects[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2007,7(3):345-352.
APA	Ma L.,Chen LE.,Xie GZ.,Ren, JY.,Xie, ZH.,...&Mei, DC.(2007).Effects of redshift on the classifying criteria of BL lacertae objects.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,7(3),345-352.
MLA	Ma L,et al."Effects of redshift on the classifying criteria of BL lacertae objects".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 7.3(2007):345-352.