Pan, Xiang, Lu, Honglin, Komossa, S., Xu, Dawei, Yuan, Weimin, Sun, Luming, Smith, Paul S., Zhang, Shaohua, Jiang, Peng, Yang, Chenwei, Liu, Wenjuan, Jiang, Ning ORCID: 0000-0002-7152-3621, Rashed, Y. E., Eckart, A., Dierkes, Jens ORCID: 0000-0002-0121-9261 and Zhou, Hongyan (2019). A Deeply Buried Narrow-line Seyfert 1 Nucleus Uncovered in Scattered Light. Astrophys. J., 870 (2). BRISTOL: IOP PUBLISHING LTD. ISSN 1538-4357

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Abstract

We present spectropolarimetric and spectrophotometric observations of the peculiar active galactic nucleus (AGN) SDSS J120300.19+162443.7 (hereafter J1203+1624) at z = 0.1656. Its optical total flux spectra clearly show broad emission lines (BELs) in H alpha and H beta. After removal of narrow emission lines (NELs), the full width at half maximum (FWHM) of the Lorentzian BEL is FWHMBEL approximate to 1270 km s(-1), fulfilling the conventional definition of a narrow-line Seyfert 1 (NLS1) galaxy. However, its NELs are unprecedentedly strong when compared to type 1 AGNs. This, together with its large MIR excess (g - W-4 = 13.172 mag), implies that the observer and the NEL region might see a different ionization continuum. Our optical spectropolarimetry confirms its type 2 nature by detecting a polarized blue continuum and Balmer BELs (FWHMPolarized BEL approximate to 1183 km s(-1)), with a high polarization degree of > 20% in the blue wing. The mass and Eddington rate of the central black hole are estimated based on both transmitted and scattered AGN radiation, which is M-center dot < 2.9 x 10(7) M-circle dot and L-bol/L-Edd > 1.5. Severe extinction of the AGN emission also enables a clear view of the compact host galaxy. The discovery of J1203 +1624 suggests that NLS1 follows the AGN unification scheme, and studying its analogs could blaze a new trail for exploring the connection between black hole growth and star formation in the host galaxy. The interesting features of J1203+1624, like the peculiar NELs and inflowing scattering clouds within the sublimation radius, are worth detailed follow-ups in the future.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Pan, XiangUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lu, HonglinUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Komossa, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Xu, DaweiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yuan, WeiminUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sun, LumingUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Smith, Paul S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Zhang, ShaohuaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jiang, PengUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yang, ChenweiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Liu, WenjuanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jiang, NingUNSPECIFIEDorcid.org/0000-0002-7152-3621UNSPECIFIED
Rashed, Y. E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Eckart, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dierkes, JensUNSPECIFIEDorcid.org/0000-0002-0121-9261UNSPECIFIED
Zhou, HongyanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-159347
DOI: 10.3847/1538-4357/aaf1bc
Journal or Publication Title: Astrophys. J.
Volume: 870
Number: 2
Date: 2019
Publisher: IOP PUBLISHING LTD
Place of Publication: BRISTOL
ISSN: 1538-4357
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
DIGITAL SKY SURVEY; OPTICAL SPECTROPOLARIMETRY; II QUASARS; GALAXIES; VARIABILITY; SPECTRA; POPULATION; RESOLUTION; DISCOVERY; ASCAMultiple languages
Astronomy & AstrophysicsMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/15934

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