Discovery of dramatic optical variability in SDSS J1100+4421: A peculiar radio-loud narrow-line Seyfert 1 galaxy?

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/101250

Title:	Discovery of dramatic optical variability in SDSS J1100+4421: A peculiar radio-loud narrow-line Seyfert 1 galaxy?
Authors:	浦田裕次;Tanaka, Masaomi;Morokuma, Tomoki;Itoh, Ryosuke;Akitaya, Hiroshi;Tominaga, Nozomu;Saito, Yoshihiko;Stawarz, Łukasz;Tanaka, Yasuyuki T.;Gandhi, Poshak;Ali, Gamal;Aoki, Tsutomu;Contreras, Carlos;Doi, Mamoru;Essam, Ahmad;Hamed, Gamal;Hsiao, Eric Y.;Iwata, Ikuru;Kawabata, Koji S.;Kawai, Nobuyuki;Kikuchi, Yuki;Kobayashi, Naoto;Kuroda, Daisuke;Maehara, Hiroyuki;Matsumoto, Emiko;Mazzali, Paolo A.;Minezaki, Takeo;Mito, Hiroyuki;Miyata, Takashi;Miyazaki, Satoshi;Mori, Kensho;Moritani, Yuki;Morokuma-Matsui, Kana;Morrell, Nidia;Nagao, Tohru;Nakada, Yoshikazu;Nakata, Fumiaki;Noma, Chinami;Ohsuga, Ken;Okada, Norio;Phillips, Mark M.;Pian, Elena;Richmond, Michael W.;Sahu, Devendra;Sako, Shigeyuki;Sarugaku, Yuki;Shibata, Takumi;Soyano, Takao;Stritzinger, Maximilian D.;Tachibana, Yutaro;Taddia, Francesco;Takaki, Katsutoshi;Takey, Ali;Tarusawa, Ken'ichi;Ui, Takahiro;Ukita, Nobuharu;Urata, Yuji;Walker, Emma S.;Yoshii, Taketoshi
Contributors:	理學院天文研究所
Keywords:	ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;Asymptotic properties;BLACK HOLES;BOLOMETERS;COSMIC GAMMA SOURCES;COSMIC RADIO SOURCES;EMISSION SPECTRA;Galaxies;galaxies: active;galaxies: individual (SDSS J110006.07+442144.3);galaxies: jets;galaxies: Seyfert;GHZ RANGE;JETS;Loudness;LUMINOSITY;MASS;Radio;RELATIVISTIC RANGE;SEYFERT GALAXIES;Spectroscopy;TRANSIENTS
Date:	2014-10-01
Issue Date:	2026-04-21 14:28:23 (UTC+8)
Publisher:	IOP Publishing Ltd.;United States
Abstract:	摘要： We present our discovery of dramatic variability in SDSS J1100+4421 by the high-cadence transient survey Kiso Supernova Survey. The source brightened in the optical by at least a factor of three within about half a day. Spectroscopic observations suggest that this object is likely a narrow-line Seyfert 1 galaxy (NLS1) at z = 0.840, however, with unusually strong narrow emission lines. The estimated black hole mass of ~10 super(7)M sub([middot in circle]) implies bolometric nuclear luminosity close to the Eddington limit. SDSS J1100+4421 is also extremely radio-loud, with a radio loudness parameter of R [Asymptotically = to] 4 x 10 super(2)-3 x 10 super(3), which implies the presence of relativistic jets. Rapid and large-amplitude optical variability of the target, reminiscent of that found in a few radio- and [gamma]-ray-loud NLS1s, is therefore produced most likely in a blazar-like core. The 1.4 GHz radio image of the source shows an extended structure with a linear size of about 100 kpc. If SDSS J1100+4421 is a genuine NLS1, as suggested here, this radio structure would then be the largest ever discovered in this type of active galaxies. 出版者： United States 出版日期： 2014-10-01 出處： Astrophysical journal. Letters, 2014-10, Vol.793 (2), p.L26-6 資源來源： Institute of Physics Journals 識別號： ISSN: 2041-8213 識別號： ISSN: 2041-8205 識別號： EISSN: 2041-8213 識別號： DOI: 10.1088/2041-8205/793/2/L26
Appears in Collections:	[Graduate Institute of Astronomy] journal & Dissertation

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