中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Discovery of superstrong, fading, iron line emission and double-peaked balmer lines of the galaxy sdss j095209.56+214313.3: The light echo of a huge flare

文献类型:期刊论文

作者Komossa, S.1; Zhou, H.1,2; Wang, T.2; Ajello, M.1; Ge, J.3; Greiner, J.1; Lu, H.2; Salvato, M.4; Saxton, R.5; Shan, H.6
刊名ASTROPHYSICAL JOURNAL LETTERS
出版日期2008-05-01
卷号678期号:1页码:L13-L16
关键词galaxies : active galaxies : evolution galaxies : individual (SDSS J095209.56+214313.3) quasars : emission lines
英文摘要We report the discovery of superstrong, fading, high-ionization iron line emission in the galaxy SDSS J095209.56 + 214313.3 ( SDSS J0952 + 2143 hereafter), which must have been caused by an X-ray outburst of large amplitude. SDSS J0952 + 2143 is unique in its strong multiwavelength variability; such a broadband emission-line and continuum response has not been observed before. The strong iron line emission is accompanied by unusual Balmer line emission with a broad base, narrow core, and double-peaked narrow horns, and strong He II emission. These lines, while strong in the SDSS spectrum taken in 2005, have faded away significantly in new spectra taken in 2007 December. Comparison of SDSS, 2MASS, GALEX, and follow-up GROND photometry reveals variability in the NUV, optical, and NIR band. Taken together, these unusual observations can be explained by a giant outburst in the EUV-X-ray band, detected even in the optical and NIR. The intense and variable iron, helium, and Balmer lines represent the "light echo" of the flare, as it traveled through circumnuclear material. The outburst may have been caused by the tidal disruption of a star by a supermassive black hole. Spectroscopic surveys such as SDSS are well suited to detect emission-line light echoes of such rare flare events. Reverberation-mapping of these light echoes can then be used as a new and efficient probe of the physical conditions in the circumnuclear material in nonactive or active galaxies.
收录类别SCI
语种英语
WOS记录号WOS:000255238900004
源URL[http://ir.bao.ac.cn/handle/114a11/7433]  
专题国家天文台_光学天文研究部
作者单位1.Max Planck Inst Extraterr Phys, D-85741 Garching, Germany
2.Univ Sci & Technol China, Ctr Astrophys, Hefei 230026, Anhui, Peoples R China
3.Univ Florida, Dept Astron, Gainesville, FL 32611 USA
4.CALTECH, Pasadena, CA 91125 USA
5.ESA ESAC, Madrid 28691, Spain
6.Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming, Peoples R China
7.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
推荐引用方式
GB/T 7714
Komossa, S.,Zhou, H.,Wang, T.,et al. Discovery of superstrong, fading, iron line emission and double-peaked balmer lines of the galaxy sdss j095209.56+214313.3: The light echo of a huge flare[J]. ASTROPHYSICAL JOURNAL LETTERS,2008,678(1):L13-L16.
APA Komossa, S..,Zhou, H..,Wang, T..,Ajello, M..,Ge, J..,...&Yuan, W..(2008).Discovery of superstrong, fading, iron line emission and double-peaked balmer lines of the galaxy sdss j095209.56+214313.3: The light echo of a huge flare.ASTROPHYSICAL JOURNAL LETTERS,678(1),L13-L16.
MLA Komossa, S.,et al."Discovery of superstrong, fading, iron line emission and double-peaked balmer lines of the galaxy sdss j095209.56+214313.3: The light echo of a huge flare".ASTROPHYSICAL JOURNAL LETTERS 678.1(2008):L13-L16.

入库方式: OAI收割

来源:国家天文台

浏览0
下载0
收藏0
其他版本

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。