DISCOVERY OF DRAMATIC OPTICAL VARIABILITY IN SDSS J1100+4421: A PECULIAR RADIO-LOUD NARROW-LINE SEYFERT 1 GALAXY?

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Tanaka, Masaomi (author)

DISCOVERY OF DRAMATIC OPTICAL VARIABILITY IN SDSS J1100+4421 : A PECULIAR RADIO-LOUD NARROW-LINE SEYFERT 1 GALAXY?

Article/chapterEnglish2014

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2014
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LIBRIS-ID:oai:DiVA.org:su-108206
https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-108206URI
https://doi.org/10.1088/2041-8205/793/2/L26DOI

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Language:English
Summary in:English

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Subject category:ref swepub-contenttype
Subject category:art swepub-publicationtype

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AuthorCount:58;
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.

Subject headings and genre

NATURVETENSKAP Fysik Astronomi, astrofysik och kosmologi hsv//swe
NATURAL SCIENCES Physical Sciences Astronomy, Astrophysics and Cosmology hsv//eng
galaxies: active
galaxies: individual (SDSS J110006.07+442144.3)
galaxies: jets
galaxies: Seyfert

Added entries (persons, corporate bodies, meetings, titles ...)

Morokuma, Tomoki (author)
Itoh, Ryosuke (author)
Akitaya, Hiroshi (author)
Tominaga, Nozomu (author)
Saito, Yoshihiko (author)
Stawarz, Lukasz (author)
Tanaka, Yasuyuki T. (author)
Gandhi, Poshak (author)
Ali, Gamal (author)
Aoki, Tsutomu (author)
Contreras, Carlos (author)
Doi, Mamoru (author)
Essam, Ahmad (author)
Hamed, Gamal (author)
Hsiao, Eric Y. (author)
Iwata, Ikuru (author)
Kawabata, Koji S. (author)
Kawai, Nobuyuki (author)
Kikuchi, Yuki (author)
Kobayashi, Naoto (author)
Kuroda, Daisuke (author)
Maehara, Hiroyuki (author)
Matsumoto, Emiko (author)
Mazzali, Paolo A. (author)
Minezaki, Takeo (author)
Mito, Hiroyuki (author)
Miyata, Takashi (author)
Miyazaki, Satoshi (author)
Mori, Kensho (author)
Moritani, Yuki (author)
Morokuma-Matsui, Kana (author)
Morrell, Nidia (author)
Nagao, Tohru (author)
Nakada, Yoshikazu (author)
Nakata, Fumiaki (author)
Noma, Chinami (author)
Ohsuga, Ken (author)
Okada, Norio (author)
Phillips, Mark M. (author)
Pian, Elena (author)
Richmond, Michael W. (author)
Sahu, Devendra (author)
Sako, Shigeyuki (author)
Sarugaku, Yuki (author)
Shibata, Takumi (author)
Soyano, Takao (author)
Stritzinger, Maximilian D. (author)
Tachibana, Yutaro (author)
Taddia, FrancescoStockholms universitet,Institutionen för astronomi(Swepub:su)ftadd (author)
Takaki, Katsutoshi (author)
Takey, Ali (author)
Tarusawa, Ken'ichi (author)
Ui, Takahiro (author)
Ukita, Nobuharu (author)
Urata, Yuji (author)
Walker, Emma S. (author)
Yoshii, Taketoshi (author)
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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By the author/editor: Tanaka, Masaomi; Morokuma, Tomoki; Itoh, Ryosuke; Akitaya, Hiroshi; Tominaga, Nozomu; Saito, Yoshihiko; show more...; Stawarz, Lukasz; Tanaka, Yasuyuki ...; Gandhi, Poshak; Ali, Gamal; Aoki, Tsutomu; Contreras, Carlo ...; Doi, Mamoru; Essam, Ahmad; Hamed, Gamal; Hsiao, Eric Y.; Iwata, Ikuru; Kawabata, Koji S ...; Kawai, Nobuyuki; Kikuchi, Yuki; Kobayashi, Naoto; Kuroda, Daisuke; Maehara, Hiroyuk ...; Matsumoto, Emiko; Mazzali, Paolo A ...; Minezaki, Takeo; Mito, Hiroyuki; Miyata, Takashi; Miyazaki, Satosh ...; Mori, Kensho; Moritani, Yuki; Morokuma-Matsui, ...; Morrell, Nidia; Nagao, Tohru; Nakada, Yoshikaz ...; Nakata, Fumiaki; Noma, Chinami; Ohsuga, Ken; Okada, Norio; Phillips, Mark M ...; Pian, Elena; Richmond, Michae ...; Sahu, Devendra; Sako, Shigeyuki; Sarugaku, Yuki; Shibata, Takumi; Soyano, Takao; Stritzinger, Max ...; Tachibana, Yutar ...; Taddia, Francesc ...; Takaki, Katsutos ...; Takey, Ali; Tarusawa, Ken'ic ...; Ui, Takahiro; Ukita, Nobuharu; Urata, Yuji; Walker, Emma S.; Yoshii, Taketosh ...; show less...

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NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Astronomy Astrop ...

Articles in the publication: Astrophysical Jo ...

By the university: Stockholm University

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