HOST GALAXY PROPERTIES AND BLACK HOLE MASS OF SWIFT J164449.3+573451 FROM MULTI-WAVELENGTH LONG-TERM MONITORING AND HST DATA

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/101547

Title:	HOST GALAXY PROPERTIES AND BLACK HOLE MASS OF SWIFT J164449.3+573451 FROM MULTI-WAVELENGTH LONG-TERM MONITORING AND HST DATA
Authors:	浦田裕次;Yoon, Yongmin;Im, Myungshin;Jeon, Yiseul;Lee, Seong-Kook;Choi, Philip;Gehrels, Neil;Pak, Soojong;Sakamoto, Takanori;Urata, Yuji
Contributors:	理學院天文研究所
Keywords:	Astrophysics - Astrophysics of Galaxies;Astrophysics of Galaxies (astro-ph.GA);FOS: Physical sciences
Date:	2015-07-20
Issue Date:	2026-04-21 14:37:28 (UTC+8)
Publisher:	IOP Publishing Ltd.;American Astronomical Society
Abstract:	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
Appears in Collections:	[Graduate Institute of Astronomy] journal & Dissertation

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