THE host galaxy of the super-luminous SN 2010gx and limits on explosive 56Ni production

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/100942

Title:	THE host galaxy of the super-luminous SN 2010gx and limits on explosive 56Ni production
Authors:	陳婷琬;Chen, Ting-Wan;Smartt, Stephen J.;Kotak, Rubina;McCrum, Matt;Fraser, Morgan;Bresolin, Fabio;Kudritzki, Rolf-Peter;Pastorello, Andrea;Valenti, Stefano
Contributors:	理學院天文研究所
Keywords:	ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;EXPLOSIONS;GALAXIES;LUMINOSITY;MASS;NICKEL 56;ROTATION;SUPERNOVAE
Date:	2013-02-01
Issue Date:	2026-04-21 14:18:55 (UTC+8)
Publisher:	IOP Publishing Ltd.;United States
Abstract:	摘要： Super-luminous supernovae have a tendency to occur in faint host galaxies which are likely to have low mass and low metallicity. While these extremely luminous explosions have been observed from z = 0.1 to 1.55, the closest explosions allow more detailed investigations of their host galaxies. We present a detailed analysis of the host galaxy of SN 2010gx (z = 0.23), one of the best studied super-luminous type Ic supernovae. The host is a dwarf galaxy (M{sub g} = -17.42 {+-} 0.17) with a high specific star formation rate. It has a remarkably low metallicity of 12 + log (O/H) = 7.5 {+-} 0.1 dex as determined from the detection of the [O III] {lambda}4363 line. This is the first reliable metallicity determination of a super-luminous stripped-envelope supernova host. We collected deep multi-epoch imaging with Gemini + GMOS between 240 and 560 days after explosion to search for any sign of radioactive {sup 56}Ni, which might provide further insights on the explosion mechanism and the progenitor's nature. We reach griz magnitudes of m{sub AB} {approx} 26, but do not detect SN 2010gx at these epochs. The limit implies that any {sup 56}Ni production was similar to or below that of SN 1998bw (a luminous type Ic SN that produced around 0.4 M{sub Sun} of {sup 56}Ni). The low volumetric rates of these supernovae ({approx}10{sup -4} of the core-collapse population) could be qualitatively matched if the explosion mechanism requires a combination of low-metallicity (below 0.2 Z{sub Sun }), high progenitor mass (>60 M{sub Sun }) and high rotation rate (fastest 10% of rotators). 出版者： United States 出版日期： 2013-02-01 出處： Astrophysical journal. Letters, 2013-02, Vol.763 (2) 資源來源： Institute of Physics Journals 識別號： ISSN: 2041-8205 識別號： EISSN: 2041-8213 識別號： DOI: 10.1088/2041-8205/763/2/L28
Appears in Collections:	[Graduate Institute of Astronomy] journal & Dissertation

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