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Optically selected BLR-less active galactic nuclei from the SDSS Stripe82 Database - I. The sample
Zhang, Xue-Guang1,2
2014-02-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume438Issue:1Pages:557-572
AbstractThis is the first paper in a dedicated series to study the properties of the optically-selected broad-line-region-less (BLR-less) active galactic nuclei (AGNs; with no-hidden central broad emission line regions). We carried out a systematic search for the BLR-less AGNs through the Sloan Digital Sky Survey Legacy Survey (SDSS Stripe82 Database). Based on the spectral decomposition results for all the 136 676 spectroscopic objects (galaxies and quasars) with redshift less than 0.35 covered by the SDSS Stripe82 region, our spectroscopic sample for the BLR-less AGNs includes 22 693 pure narrow line objects without broad emission lines but with apparent AGN continuum emission R-AGN > 0.3 and apparent stellar lights R-ssp > 0.3. Then, using the properties of the photometry magnitude RMS (RMS) and Pearson's coefficients (R-1,R- 2) between two different SDSS band light curves: RMSk > 3 x RMSMk and R-1,R- 2 > similar to 0.8, the final 281 pure narrow line objects with true photometry variabilities are our selected reliable candidates for the BLR-less AGNs. The selected candidates with higher confidence levels not only have the expected spectral features of the BLR-less AGNs, but also show significant true photometry variabilities. The reported sample enlarges at least four times the current sample of the BLR-less AGNs, and will provide more reliable information to explain the lack of the BLRs of AGNs in our following studies.
KeywordGalaxies: Active Galaxies: Nuclei Quasars: Emission Lines Galaxies: Seyfert
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1093/mnras/stt2226
WOS KeywordDIGITAL-SKY-SURVEY ; SEYFERT 2 GALAXIES ; BROAD-LINE REGIONS ; STELLAR POPULATION SYNTHESIS ; BLACK-HOLE MASS ; ULTRALUMINOUS INFRARED GALAXIES ; STAR-FORMING GALAXIES ; EMISSION-LINE ; CHANDRA OBSERVATIONS ; ACCRETION RATE
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Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000330457100060
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Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/10614
Collection南极天文中心
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.Chinese Ctr Antarctic Astron, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Xue-Guang. Optically selected BLR-less active galactic nuclei from the SDSS Stripe82 Database - I. The sample[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2014,438(1):557-572.
APA Zhang, Xue-Guang.(2014).Optically selected BLR-less active galactic nuclei from the SDSS Stripe82 Database - I. The sample.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,438(1),557-572.
MLA Zhang, Xue-Guang."Optically selected BLR-less active galactic nuclei from the SDSS Stripe82 Database - I. The sample".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 438.1(2014):557-572.
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