Universität zu Köln

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

Full text not available from this repository.

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:	Creators Email ORCID ORCID Put Code Pan, Xiang UNSPECIFIED UNSPECIFIED UNSPECIFIED Lu, Honglin UNSPECIFIED UNSPECIFIED UNSPECIFIED Komossa, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Xu, Dawei UNSPECIFIED UNSPECIFIED UNSPECIFIED Yuan, Weimin UNSPECIFIED UNSPECIFIED UNSPECIFIED Sun, Luming UNSPECIFIED UNSPECIFIED UNSPECIFIED Smith, Paul S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Zhang, Shaohua UNSPECIFIED UNSPECIFIED UNSPECIFIED Jiang, Peng UNSPECIFIED UNSPECIFIED UNSPECIFIED Yang, Chenwei UNSPECIFIED UNSPECIFIED UNSPECIFIED Liu, Wenjuan UNSPECIFIED UNSPECIFIED UNSPECIFIED Jiang, Ning UNSPECIFIED orcid.org/0000-0002-7152-3621 UNSPECIFIED Rashed, Y. E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Eckart, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Dierkes, Jens UNSPECIFIED orcid.org/0000-0002-0121-9261 UNSPECIFIED Zhou, Hongyan UNSPECIFIED UNSPECIFIED UNSPECIFIED
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:	Keywords Language DIGITAL SKY SURVEY; OPTICAL SPECTROPOLARIMETRY; II QUASARS; GALAXIES; VARIABILITY; SPECTRA; POPULATION; RESOLUTION; DISCOVERY; ASCA Multiple languages Astronomy & Astrophysics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/15934