NTT, SPITZER, AND CHANDRA SPECTROSCOPY OF SDSSJ095209.56+214313.3: THE MOST LUMINOUS CORONAL-LINE SUPERNOVA EVER OBSERVED, OR A STELLAR TIDAL DISRUPTION EVENT?
文献类型：期刊论文
| 作者 | Komossa, S.1; Zhou, H.1,6; Rau, A.2; Dopita, M.3; Gal-Yam, A.4; Greiner, J.1; Zuther, J.5; Salvato, M.2; Xu, D.7 ; Lu, H.1,6
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2009-08-10 |
| 卷号 | 701期号:1页码:105-121 |
| 关键词 | circumstellar matter galaxies: general galaxies: individual (SDSSJ095209.56+214313.3) supernovae: general |
| 英文摘要 | The galaxy SDSSJ095209.56+214313.3 (SDSSJ0952+2143 hereafter) showed remarkable emission-line and continuum properties and strong emission-line variability first reported in 2008 (Paper I). The spectral properties and low-energy variability are the consequence of a powerful high-energy flare which was itself not observed directly. Here we report follow-up optical, near-infrared (NIR), mid-infrared (MIR), and X-ray observations of SDSSJ0952+2143. We discuss outburst scenarios in terms of stellar tidal disruption by a supermassive black hole, peculiar variability of an active galactic nucleus (AGN), and a supernova (SN) explosion, and possible links between these scenarios and mechanisms. The optical spectrum of SDSSJ0952+2143 exhibits several peculiarities: an exceptionally high ratio of [Fe VII] transitions over [O III], a dramatic decrease by a factor of 10 of the highest-ionization coronal lines, a very unusual and variable Balmer line profile including a triple-peaked narrow component with two unresolved horns, and a large Balmer decrement. The MIR emission measured with the Spitzer IRS in the narrow 10-20 mu m band is extraordinarily luminous and amounts to L(10-20) mu m = 3.5 x 10(43) erg s(-1). The IRS spectrum shows a bump around similar to 11 mu m and an increase toward longer wavelengths, reminiscent of silicate emission. The strong MIR excess over the NIR implies the dominance of relatively cold dust. The pre- and post-flare NIR host galaxy colors indicate a nonactive galaxy. The X-ray luminosity of L(x,0.1-10 keV) = 10(41) erg s(-1) measured with Chandra is below that typically observed in AGNs. Similarities of SDSSJ0952+2143 with some extreme SNe suggest the explosion of a SN of Type IIn. However, an extreme accretion event in a low-luminosity AGN or inactive galaxy, especially stellar tidal disruption, remain possibilities, which could potentially produce a very similar emission-line response. If indeed a SN, SDSSJ0952+2143 is one of the most distant X-ray- and MIR-detected SNe known so far, the most MIR luminous, and one of the most X-ray luminous. It is also by far the most luminous (> 10(40) erg s(-1)) in high-ionization coronal lines, exceeding previous SNe by at least a factor of 100. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000268341800011 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7940]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Max Planck Inst Extraterr Phys, D-85741 Garching, Germany 2.CALTECH, Pasadena, CA 91125 USA 3.Australian Natl Univ, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia 4.Weizmann Inst Sci, Benoziyo Ctr Astrophys, IL-76100 Rehovot, Israel 5.Univ Cologne, Inst Phys 1, D-50937 Cologne, Germany 6.Univ Sci & Technol China, Ctr Astrophys, Hefei 230026, Anhui, Peoples R China 7.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 8.ESA ESAC, Madrid 28691, Spain 9.SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA 10.KIPAC, Menlo Pk, CA 94025 USA |
| 推荐引用方式 GB/T 7714 | Komossa, S.,Zhou, H.,Rau, A.,et al. NTT, SPITZER, AND CHANDRA SPECTROSCOPY OF SDSSJ095209.56+214313.3: THE MOST LUMINOUS CORONAL-LINE SUPERNOVA EVER OBSERVED, OR A STELLAR TIDAL DISRUPTION EVENT?[J]. ASTROPHYSICAL JOURNAL,2009,701(1):105-121. |
| APA | Komossa, S..,Zhou, H..,Rau, A..,Dopita, M..,Gal-Yam, A..,...&Ajello, M..(2009).NTT, SPITZER, AND CHANDRA SPECTROSCOPY OF SDSSJ095209.56+214313.3: THE MOST LUMINOUS CORONAL-LINE SUPERNOVA EVER OBSERVED, OR A STELLAR TIDAL DISRUPTION EVENT?.ASTROPHYSICAL JOURNAL,701(1),105-121. |
| MLA | Komossa, S.,et al."NTT, SPITZER, AND CHANDRA SPECTROSCOPY OF SDSSJ095209.56+214313.3: THE MOST LUMINOUS CORONAL-LINE SUPERNOVA EVER OBSERVED, OR A STELLAR TIDAL DISRUPTION EVENT?".ASTROPHYSICAL JOURNAL 701.1(2009):105-121. |
入库方式： OAI收割
来源：国家天文台
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