Properties of low radio luminosity RGB BL LAC objects
文献类型：期刊论文
| 作者 | Chen LE(陈洛恩)1,2,3 ; Xie GZ(谢光中)1; Ren, JY4; Zhou SB(周曙白)1,3,4; Ma L(马力)1,3,5
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2006-02-01 |
| 卷号 | 637期号:2页码:711-716 |
| 关键词 | BL Lacertae objects : general galaxies : fundamental parameters |
| ISSN号 | 0004-637X |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Chen, LE (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China. |
| 英文摘要 | The ROSAT All-Sky Survey-Green Bank (RGB) BL Lac object sample presented by Laurent-Muehleisen et al. includes not only interesting intermediate but also extreme HBL and LBL sources. These unique characteristics make it possible to unambiguously address the question of how HBLs and LBLs are related. In this paper, we study the relations between the radio-X-ray spectral index (alpha(rx)) and each of the luminosities (L-r, L-o, L-x), as well as the relation between the X-ray spectral index ( alpha x) and the radio luminosity ( Lr) for this sample. Our analysis results indicate that (1) plots of (alpha(rx), L-i) ( i denotes r, o, or x) all exhibit the continuity of alpha(rx); ( 2) of 71 low-L-r RGB BL Lac objects (L-5 GHz < 10(25) W Hz(-1)), 24% have alpha(rx) steeper than 0.75, while 79% are distributed in the region 0: 6 < alpha(rx) < 0: 9 and have such a broad scatter in alpha(rx) that alpha(rx) can range from 0.55 to 0.8 for any given value of Lr; ( 3) of 60 low-Lr RGB BL Lac objects ( with alpha(x) available), 20% have alpha(x) flatter than 1, and no correlation is present for alpha(x) versus alpha(x). In addition, no correlation is found between L-o and alpha(rx) for the RGB BL Lac sample. These characteristics seem inconsistent with those derived from the earlier classic combined surveys. From our analysis, however, we also found that (1) there is a significant anticorrelation for L-x versus alpha(rx), which agrees with that reported by Mei et al., and ( 2) more importantly, alpha(rx) is well correlated with Lr, which is consistent with the result expected in the blazar sequence but in contradiction with that derived from the DXRBS sample. All of these seemingly odd results show the importance of sampling enough parameter space in order to obtain an unbiased view or model of blazar properties. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | SPECTRAL ENERGY-DISTRIBUTIONS ; X-RAY-SPECTRA ; LACERTAE OBJECTS ; ROSAT OBSERVATIONS ; CLASSIFICATORY CRITERIA ; BLAZARS ; CATALOG ; SAMPLE |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/0004-637X/637/2/711/ |
| 语种 | 英语 |
| WOS记录号 | WOS:000235131600014 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/7008]  |
| 专题 | 云南天文台_星系研究组 |
| 作者单位 | 1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, Kunming 650011, China 2.Department of Physics, Yuxi Normal College, Yuxi 653100, China 3.Graduate School of the Chinese Academy of Sciences, Beijing, China 4.Department of Physics, Yunnan University, Kunming 650091, China 5.Physics Department, Yunnan Normal University, Kunming 650091, China |
| 推荐引用方式 GB/T 7714 | Chen LE,Xie GZ,Ren, JY,et al. Properties of low radio luminosity RGB BL LAC objects[J]. ASTROPHYSICAL JOURNAL,2006,637(2):711-716. |
| APA | Chen LE,Xie GZ,Ren, JY,Zhou SB,&Ma L.(2006).Properties of low radio luminosity RGB BL LAC objects.ASTROPHYSICAL JOURNAL,637(2),711-716. |
| MLA | Chen LE,et al."Properties of low radio luminosity RGB BL LAC objects".ASTROPHYSICAL JOURNAL 637.2(2006):711-716. |
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来源：云南天文台
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