VERY LONG BASELINE ARRAY IMAGING OF PARSEC-SCALE RADIO EMISSIONS IN NEARBY RADIO-QUIET NARROW-LINE SEYFERT 1 GALAXIES
文献类型：期刊论文
| 作者 | Doi, Akihiro1,2; Asada, Keiichi3; Fujisawa, Kenta4; Nagai, Hiroshi5; Hagiwara, Yoshiaki5; Wajima, Kiyoaki6; Inoue, Makoto3 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2013-03-01 |
| 卷号 | 765期号:1页码:1 |
| 关键词 | galaxies: active galaxies: individual (MRK 110 galaxies: jets galaxies: Seyfert radio continuum: galaxies MRK 705 MRK 1239 NGC 4051 MRK 766 (NGC 4253) MRK 783 AKN 564) |
| 英文摘要 | We conducted Very Long Baseline Array (VLBA) observations of seven nearby narrow-line Seyfert 1 (NLS1) galaxies at 1.7 GHz (lambda 18 cm) with milliarcsecond resolution. This is the first systematic very long baseline interferometry study focusing on the central parsec-scale regions of radio-quiet NLS1s. Five of the seven were detected at a brightness temperature of greater than or similar to 5 x 10(6) K and contain radio cores with high brightness temperatures of >6 x 10(7) K, indicating a nonthermal process driven by jet-producing central engines as in radio-loud NLS1s and other active galactic nucleus classes. VLBA images of MRK 1239, MRK 705, and MRK 766 exhibit parsec-scale jets with clear linear structures. A large portion of the radio power comes from diffuse emission components that are distributed within the nuclear regions (less than or similar to 300 pc), which is a common characteristic throughout the observed NLS1s. Jet kinetic powers limited by the Eddington limit may be insufficient to allow the jets to escape to kiloparsec scales for these radio-quiet NLS1s with low-mass black holes of less than or similar to 10(7) M-circle dot. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | ACTIVE GALACTIC NUCLEI ; BLACK-HOLE MASS ; DIGITAL SKY SURVEY ; X-RAY-PROPERTIES ; OPTICALLY SELECTED QUASARS ; CENTRAL ENGINES ; LIMITED SAMPLE ; JET POWER ; RELATIVISTIC JETS ; VLBI OBSERVATIONS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000314957900069 |
| 源URL | [http://119.78.226.72/handle/331011/18011]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Chuou Ku, Sagamihara, Kanagawa 2525210, Japan 2.Grad Univ Adv Studies, Dept Space & Astronaut Sci, Chuou Ku, Sagamihara, Kanagawa 2525210, Japan 3.Acad Sinica, Inst Astron & Astrophys, Taipei 10617, Taiwan 4.Yamaguchi Univ, Res Inst Time Studies, Yamaguchi 7538511, Japan 5.Natl Astron Observ, Mitaka, Tokyo 1818588, Japan 6.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Doi, Akihiro,Asada, Keiichi,Fujisawa, Kenta,et al. VERY LONG BASELINE ARRAY IMAGING OF PARSEC-SCALE RADIO EMISSIONS IN NEARBY RADIO-QUIET NARROW-LINE SEYFERT 1 GALAXIES[J]. ASTROPHYSICAL JOURNAL,2013,765(1):1. |
| APA | Doi, Akihiro.,Asada, Keiichi.,Fujisawa, Kenta.,Nagai, Hiroshi.,Hagiwara, Yoshiaki.,...&Inoue, Makoto.(2013).VERY LONG BASELINE ARRAY IMAGING OF PARSEC-SCALE RADIO EMISSIONS IN NEARBY RADIO-QUIET NARROW-LINE SEYFERT 1 GALAXIES.ASTROPHYSICAL JOURNAL,765(1),1. |
| MLA | Doi, Akihiro,et al."VERY LONG BASELINE ARRAY IMAGING OF PARSEC-SCALE RADIO EMISSIONS IN NEARBY RADIO-QUIET NARROW-LINE SEYFERT 1 GALAXIES".ASTROPHYSICAL JOURNAL 765.1(2013):1. |
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来源：上海天文台
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