JAXA Repository / AIREX 未来へ続く、宙(そら)への英知
AA1630016000.pdf853.89 kB
titleMID-INFRARED VARIABILITY OF ACTIVE GALACTIC NUCLEI WITH THE AKARI AND WISE ALL-SKY SURVEYS
DOIinfo:doi/10.20637/JAXA-RR-16-010E/0001
Author(jpn)松田, 桂子; 堂谷, 忠靖; Gandhi, Poshak; 中川, 貴雄; 塩谷, 圭吾; 松原, 英雄; 瀧田, 怜; 鳥羽, 儀樹
Author(eng)Matsuta, Keiko; Dotani, Tadayasu; Gandhi, Poshak; Nakagawa, Takao; Enya, Keigo; Matsuhara, Hideo; Takita, Satoshi; Toba, Yoshiki
Author Affiliation(jpn)総合研究大学院大学(SOKENDAI) : 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS) : 富士ゼロックスアドバンストテクノロジー株式会社; 総合研究大学院大学(SOKENDAI) : 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS); 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS) : Durham University; 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS); 総合研究大学院大学(SOKENDAI) : 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS); 総合研究大学院大学(SOKENDAI) : 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS); 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS); 総合研究大学院大学(SOKENDAI) : 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)
Author Affiliation(eng)The Graduate University for Advanced Studies (SOKENDAI) : Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS) : Fuji Xerox Advanced Technology Co., Ltd.; The Graduate University for Advanced Studies (SOKENDAI) : Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS); Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS) : Durham University; Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS); The Graduate University for Advanced Studies (SOKENDAI) : Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS); The Graduate University for Advanced Studies (SOKENDAI) : Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS); Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS); The Graduate University for Advanced Studies (SOKENDAI) : Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)
Issue Date2017-02-13
PublisherJapan Aerospace Exploration Agency (JAXA)
宇宙航空研究開発機構(JAXA)
Publication titleJAXA Research and Development Report
宇宙航空研究開発機構研究開発報告
VolumeJAXA-RR-16-010E
Start page1
End page13
Publication date2017-02-13
Languageeng
AbstractWe studied mid-infrared (mid-IR) variability of AGN systematically combining two all-sky survey catalogs released by AKARI and Wide-field Infrared Survey Explorer (WISE). Because the two surveys are separated by approximately 4 years, our studies are sensitive to variations of time scales of a few years. We started with the list of AGN selected by Matsuta et al. (2012) from the cross-identification of Swift/BAT and AKARI catalogs. The list was further correlated with the WISE catalog to select a total of 71 AGN, which were used for the present studies. We compared source fluxes in the AKARI S9W (9μm) and WISE W3 (12μm) bands and in the AKARI L18W (18μm) and WISE W4 (22μm) bands carefully correcting for the band differences and considering the systematic effects. We detected significant flux changes from 3 sources, two blazars (3C 273, 3C 345) and a radio galaxy (3C 445), in the mid-IR bands. This is the first detection of mid-IR variability from 3C 445, which may be originated from the jets. We also analyzed average sample variability for different AGN types excluding these 3 variable sources. We detected significant variations from Seyfert 1 in the S9W-W3 band with 95% confidence limit; the average fractional variability reached 13% (6-18%). Two origins are conceivable for the variability: the dusty torus and the jets. If such variability originates from the torus, the dust distribution in the torus should be very narrow, and its radial extent may be much smaller than the distance to the AGN. Alternatively, the variability may result from the jets considered to be present in Seyfert 1 galaxies.
DescriptionPhysical characteristics: Original contains color illustrations
形態: カラー図版あり
Keywordsactive galactic nuclei; infrared sources; X-ray sources
Document TypeTechnical Report
JAXA Category研究開発報告
NASA Subject CategoryAstrophysics
ISSN1349-1113
NCIDAA1192675X
SHI-NOAA1630016000
Report NoJAXA-RR-16-010E
URIhttps://repository.exst.jaxa.jp/dspace/handle/a-is/591859


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.