dc.contributor.author | Tanaka, M | |
dc.contributor.author | Morokuma, T | |
dc.contributor.author | Itoh, R | |
dc.contributor.author | Akitaya, H | |
dc.contributor.author | Tominaga, N | |
dc.contributor.author | Saito, Y | |
dc.contributor.author | Stawarz, L | |
dc.contributor.author | Tanaka, Y, T | |
dc.contributor.author | Gandhi, P | |
dc.contributor.author | Ali, G | |
dc.contributor.author | Aoki, T | |
dc.contributor.author | Contreras, C | |
dc.contributor.author | Doi, M | |
dc.contributor.author | Essam, A | |
dc.contributor.author | Hamed, G | |
dc.contributor.author | Hsiao, E. Y | |
dc.contributor.author | Iwata, I | |
dc.contributor.author | Kawabata, K. S | |
dc.contributor.author | Kawai, N | |
dc.contributor.author | Kikuchi, Y | |
dc.contributor.author | Kobayashi, N | |
dc.contributor.author | Kuroda, D | |
dc.contributor.author | Maehara, H | |
dc.contributor.author | Matsumoto, E | |
dc.contributor.author | Mazzali, P. A | |
dc.contributor.author | Minezaki, T | |
dc.contributor.author | Mito, H | |
dc.contributor.author | Miyata, T | |
dc.contributor.author | Miyazaki, S | |
dc.contributor.author | Mori, K | |
dc.contributor.author | Moritani, Y | |
dc.contributor.author | Morokuma-Matsui, Kana | |
dc.contributor.author | Morrell, N | |
dc.contributor.author | Nagao, T | |
dc.contributor.author | Nakada, Y | |
dc.contributor.author | Nakata, F | |
dc.contributor.author | Noma, C | |
dc.contributor.author | Ohsuga, K | |
dc.contributor.author | Okada, N | |
dc.contributor.author | Phillips, M. M | |
dc.contributor.author | Pian, E | |
dc.contributor.author | Richmond, M. W | |
dc.contributor.author | Sahu, D. K | |
dc.contributor.author | Sako, S | |
dc.contributor.author | Sarugaku, Y | |
dc.contributor.author | Shibata, T | |
dc.contributor.author | Soyano, T | |
dc.contributor.author | Stritzinger, M. D | |
dc.contributor.author | Tachibana, Y | |
dc.contributor.author | Taddia, F | |
dc.contributor.author | Takaki, K | |
dc.contributor.author | Takey, Ali | |
dc.contributor.author | Tarusawa, K | |
dc.contributor.author | Ui, T | |
dc.contributor.author | Ukita, N | |
dc.contributor.author | Urata, Y | |
dc.contributor.author | Walker, E. S | |
dc.contributor.author | Yoshii, T | |
dc.date.accessioned | 2014-10-21T09:11:58Z | |
dc.date.available | 2014-10-21T09:11:58Z | |
dc.date.issued | 2014-10-01 | |
dc.identifier.citation | The Astrophysical Journal Letters, Vol. 793, No. 2, L26 | en |
dc.identifier.issn | 2041-8205 | |
dc.identifier.uri | http://hdl.handle.net/2248/6663 | |
dc.description | Restricted Access | en |
dc.description.abstract | 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 ~107 M ☉ implies bolometric nuclear luminosity close to the Eddington limit. SDSS J1100+4421 is also extremely radio-loud, with a radio loudness parameter of R sime 4 × 102-3 × 103, 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 γ-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. | en |
dc.language.iso | en | en |
dc.publisher | IOP Publishing | en |
dc.relation.uri | http://iopscience.iop.org/2041-8205/793/2/L26/ | en |
dc.rights | © IOP Publishing | en |
dc.subject | Galaxies: active | en |
dc.subject | Galaxies: individual (SDSS J110006.07+442144.3) | en |
dc.subject | Galaxies: jets | en |
dc.subject | Galaxies: Seyfert | en |
dc.title | Discovery of Dramatic Optical Variability in SDSS J1100+4421: A Peculiar Radio-loud Narrow-line Seyfert 1 Galaxy? | en |
dc.type | Article | en |