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| 題名: | HOST GALAXY PROPERTIES AND BLACK HOLE MASS OF SWIFT J164449.3+573451 FROM MULTI-WAVELENGTH LONG-TERM MONITORING AND HST DATA |
| 作者: | 浦田裕次;Yoon, Yongmin;Im, Myungshin;Jeon, Yiseul;Lee, Seong-Kook;Choi, Philip;Gehrels, Neil;Pak, Soojong;Sakamoto, Takanori;Urata, Yuji |
| 貢獻者: | 理學院天文研究所 |
| 關鍵詞: | Astrophysics - Astrophysics of Galaxies;Astrophysics of Galaxies (astro-ph.GA);FOS: Physical sciences |
| 日期: | 2015-07-20 |
| 上傳時間: | 2026-04-21 14:37:28 (UTC+8) |
| 出版者: | IOP Publishing Ltd.;American Astronomical Society |
| 摘要: | 摘要： We study the host galaxy properties of the tidal disruption object, Swift J164449.3+573451 using long-term optical to near-infrared (NIR) data. First, we decompose the galaxy surface brightness distribution and analyze the morphology of the host galaxy using high resolution \emph{HST} WFC3 images. We conclude that the host galaxy is a bulge-dominant galaxy that is well described by a single S rsic model with S rsic index $n=3.43\pm0.05$. Adding a disk component, the bulge to total host galaxy flux ratio (B/T) is $0.83\pm0.03$, which still indicates a bulge-dominant galaxy. Second, we estimate multi-band fluxes of the host galaxy through long-term light curves. Our long-term NIR light curves reveal the pure host galaxy fluxes $\sim500$ days after the burst. We fit spectral energy distribution (SED) models to the multi-band fluxes from the optical to NIR of the host galaxy and determine its properties. The stellar mass, the star formation rate, and the age of stellar population are $\log(M_{\star}/M_{\odot}) = 9.14^{+0.13}_{-0.10}$, $0.03^{+0.28}_{-0.03}\, M_{\odot}$/yr, and $0.63^{+0.95}_{-0.43}$ Gyr. Finally, we estimate the mass of the central super massive black hole which is responsible for the tidal disruption event. The black hole mass is estimated to be $10^{6.7\pm0.4}\, M_{\odot}$ from $M_{\mathrm{BH}}$ - $M_{\star,\mathrm{bul}}$ and $M_{\mathrm{BH}}$ - $L_{\mathrm{bul}}$ relations for the $K$ band, although a smaller value of $\sim10^5\, M_{\odot}$ cannot be excluded convincingly if the host galaxy harbors a pseudobulge. 12 pages, 10 figures, published in APJ
出版者： American Astronomical Society
出版日期： 2015-07-23
出處： The Astrophysical Journal, 2015-07, Vol.808, p.96-
資源來源： Institute of Physics Journals
識別號： EISSN: 1538-4357
識別號： DOI: 10.1088/0004-637x/808/1/96
識別號： DOI: 10.48550/arxiv.1507.08843 |
| 顯示於類別: | [天文研究所] 期刊論文
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