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DISCOVERY OF DRAMAT...
DISCOVERY OF DRAMATIC OPTICAL VARIABILITY IN SDSS J1100+4421 : A PECULIAR RADIO-LOUD NARROW-LINE SEYFERT 1 GALAXY?
- Article/chapterEnglish2014
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LIBRIS-ID:oai:DiVA.org:su-108206
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https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-108206URI
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https://doi.org/10.1088/2041-8205/793/2/L26DOI
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
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AuthorCount:58;
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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 similar to 10(7) M-circle dot implies bolometric nuclear luminosity close to the Eddington limit. SDSS J1100+4421 is also extremely radio-loud, with a radio loudness parameter of R similar or equal to 4 x 10(2)-3 x 10(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.
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Morokuma, Tomoki
(author)
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Itoh, Ryosuke
(author)
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Akitaya, Hiroshi
(author)
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Tominaga, Nozomu
(author)
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Saito, Yoshihiko
(author)
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Stawarz, Lukasz
(author)
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Tanaka, Yasuyuki T.
(author)
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Gandhi, Poshak
(author)
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Ali, Gamal
(author)
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Aoki, Tsutomu
(author)
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Contreras, Carlos
(author)
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Doi, Mamoru
(author)
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Essam, Ahmad
(author)
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Hamed, Gamal
(author)
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Hsiao, Eric Y.
(author)
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Iwata, Ikuru
(author)
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Kawabata, Koji S.
(author)
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Kawai, Nobuyuki
(author)
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Kikuchi, Yuki
(author)
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Kobayashi, Naoto
(author)
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Kuroda, Daisuke
(author)
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Maehara, Hiroyuki
(author)
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Matsumoto, Emiko
(author)
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Mazzali, Paolo A.
(author)
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Minezaki, Takeo
(author)
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Mito, Hiroyuki
(author)
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Miyata, Takashi
(author)
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Miyazaki, Satoshi
(author)
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Mori, Kensho
(author)
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Moritani, Yuki
(author)
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Morokuma-Matsui, Kana
(author)
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Morrell, Nidia
(author)
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Nagao, Tohru
(author)
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Nakada, Yoshikazu
(author)
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Nakata, Fumiaki
(author)
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Noma, Chinami
(author)
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Ohsuga, Ken
(author)
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Okada, Norio
(author)
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Phillips, Mark M.
(author)
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Pian, Elena
(author)
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Richmond, Michael W.
(author)
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Sahu, Devendra
(author)
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Sako, Shigeyuki
(author)
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Sarugaku, Yuki
(author)
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Shibata, Takumi
(author)
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Soyano, Takao
(author)
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Stritzinger, Maximilian D.
(author)
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Tachibana, Yutaro
(author)
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Taddia, FrancescoStockholms universitet,Institutionen för astronomi(Swepub:su)ftadd
(author)
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Takaki, Katsutoshi
(author)
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Takey, Ali
(author)
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Tarusawa, Ken'ichi
(author)
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Ui, Takahiro
(author)
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Ukita, Nobuharu
(author)
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Urata, Yuji
(author)
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Walker, Emma S.
(author)
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Yoshii, Taketoshi
(author)
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Stockholms universitetInstitutionen för astronomi
(creator_code:org_t)
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In:Astrophysical Journal Letters793:2, s. L26-2041-82052041-8213
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Tanaka, Masaomi
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Morokuma, Tomoki
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Itoh, Ryosuke
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Akitaya, Hiroshi
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Tominaga, Nozomu
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Saito, Yoshihiko
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show more...
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Stawarz, Lukasz
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Tanaka, Yasuyuki ...
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Gandhi, Poshak
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Ali, Gamal
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Aoki, Tsutomu
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Contreras, Carlo ...
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Doi, Mamoru
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Essam, Ahmad
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Hamed, Gamal
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Hsiao, Eric Y.
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Iwata, Ikuru
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Kawabata, Koji S ...
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Kawai, Nobuyuki
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Kikuchi, Yuki
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Kobayashi, Naoto
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Kuroda, Daisuke
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Maehara, Hiroyuk ...
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Matsumoto, Emiko
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Mazzali, Paolo A ...
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Minezaki, Takeo
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Mito, Hiroyuki
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Miyata, Takashi
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Miyazaki, Satosh ...
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Mori, Kensho
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Moritani, Yuki
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Morokuma-Matsui, ...
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Morrell, Nidia
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Nagao, Tohru
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Nakada, Yoshikaz ...
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Nakata, Fumiaki
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Noma, Chinami
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Ohsuga, Ken
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Okada, Norio
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Phillips, Mark M ...
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Pian, Elena
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Richmond, Michae ...
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Sahu, Devendra
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Sako, Shigeyuki
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Sarugaku, Yuki
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Shibata, Takumi
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Soyano, Takao
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Stritzinger, Max ...
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Tachibana, Yutar ...
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Taddia, Francesc ...
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Takaki, Katsutos ...
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Takey, Ali
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Tarusawa, Ken'ic ...
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Ui, Takahiro
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Ukita, Nobuharu
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Urata, Yuji
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Walker, Emma S.
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Yoshii, Taketosh ...
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