Flat-spectrum radio quasars from the SDSS DR3 quasar catalogue
文献类型：期刊论文
| 作者 | Chen, Zhaoyu1,2; Gu, Minfeng1 ; Cao, Xinwu1
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2009-08-21 |
| 卷号 | 397期号:4页码:1713-1727 |
| 关键词 | galaxies: active galaxies: jets quasars: emission lines quasars: general |
| 英文摘要 | We constructed a sample of 185 flat-spectrum radio quasars (FSRQs) by cross-correlating Shen et al.'s Sloan Digital Sky Survey Data Release 3 (SDSS DR3) X-ray quasar sample with the Faint Images of the Radio Sky at Twenty Centimeters (FIRST) and Green Bank 6-cm survey (GB6) radio catalogues. From the spectral energy distribution (SED) constructed using multi-band (radio, UV, optical, infrared and X-ray) data, we derived the synchrotron peak frequency and peak luminosity. The black hole mass M(BH) and the broad-line region (BLR) luminosity (then the bolometric luminosity L(bol)) were obtained by measuring the linewidth and strength of broad emission lines from SDSS spectra. We define a subsample of 118 FSRQs for which non-thermal jet emission is thought to dominate over thermal emission from the accretion disc and host galaxy. For this subsample, we found 25 FSRQs having synchrotron peak frequency nu(peak) > 10(15) Hz, which is higher than the typical value for FSRQs. These sources with high nu(peak) could be targets for the Fermi gamma-ray telescope. Only a weak anti-correlation is found between the synchrotron peak frequency and peak luminosity, while no strong correlation is present between either the synchrotron peak frequency and black hole mass or the synchrotron peak frequency and the Eddington ratio L(bol)/L(Edd). When combining the FSRQ subsample with Wu et al.'s sample of 170 BL Lac objects, a strong anti-correlation between the synchrotron peak frequency and luminosity is apparently present, covering about seven orders of magnitude in nu(peak). However, the anti-correlation differs from the blazar sequence in having large scatter. At a similar peak frequency, the peak luminosity of FSRQs with nu(peak) > 10(15) Hz is systematically higher than that of BL Lac objects, with some FSRQs outside the range covered by BL Lac objects. Although high nu(peak) values are found in some FSRQs, they do not reach the extreme value of BL Lacs. For the subsample of 118 FSRQs, we found significant correlations between the peak luminosity and black hole mass, the Eddington ratio and the BLR luminosity, indicating that the jet physics may be strongly related to the accretion process. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | DIGITAL-SKY SURVEY ; BLACK-HOLE MASSES ; EMISSION-LINE PROPERTIES ; ACTIVE GALACTIC NUCLEI ; BL LACERTAE OBJECTS ; X-RAY-EMISSION ; BLAZAR SEQUENCE ; ENERGY-DISTRIBUTIONS ; STAR-FORMATION ; LOUD QUASARS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000268958400001 |
| 公开日期 | 2015-03-17 |
| 源URL | [http://119.78.226.72//handle/331011/15881]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Zhaoyu,Gu, Minfeng,Cao, Xinwu. Flat-spectrum radio quasars from the SDSS DR3 quasar catalogue[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2009,397(4):1713-1727. |
| APA | Chen, Zhaoyu,Gu, Minfeng,&Cao, Xinwu.(2009).Flat-spectrum radio quasars from the SDSS DR3 quasar catalogue.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,397(4),1713-1727. |
| MLA | Chen, Zhaoyu,et al."Flat-spectrum radio quasars from the SDSS DR3 quasar catalogue".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 397.4(2009):1713-1727. |
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