Spatially resolved molecular gas properties of host galaxy of Type I superluminous supernova SN 2017egm

被引：5
|
作者：
Hatsukade, Bunyo [1 ]
Morokuma-Matsui, Kana [1 ]
Hayashi, Masao [2 ]
Tominaga, Nozomu [3 ,4 ]
Tamura, Yoichi [5 ]
Niinuma, Kotaro [6 ]
Motogi, Kazuhiro [6 ]
Morokuma, Tomoki [1 ]
Matsuda, Yuichi [2 ,7 ]
机构：
[1] Univ Tokyo, Grad Sch Sci, Inst Astron, 2-21-1 Osawa, Mitaka, Tokyo 1810015, Japan
[2] Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
[3] Konan Univ, Fac Sci & Engn, Dept Phys, 8-9-1 Okamoto, Kobe, Hyogo 6588501, Japan
[4] Univ Tokyo, Kavli Inst Phys & Math Universe WPI, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778583, Japan
[5] Nagoya Univ, Dept Phys, Chikusa Ku, Furo Cho, Nagoya, Aichi 4648602, Japan
[6] Yamaguchi Univ, Grad Sch Sci & Technol Innovat, Yoshida 1677-1, Yamaguchi, Yamaguchi 7538512, Japan
[7] Grad Univ Adv Studies SOKENDAI, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
来源：
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2020年 / 72卷 / 04期
基金：
美国国家航空航天局; 美国国家科学基金会;
关键词：
supernovae: individual (Gaia17biu/SN 2017egm); galaxies: ISM; galaxies: star formation; radio lines: galaxies; STAR-FORMATION; LEGACY SURVEY; STELLAR;
D O I：
10.1093/pasj/psaa052
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present the results of CO(1-0) observations of the host galaxy of a Type I superluminous supernova (SLSN-I), SN 2017egm, one of the closest SLSNe-I at z= 0.03063, by using the Atacama Large Millimeter/submillimeter Array. The molecular gas mass of the host galaxy is M-gas = (4.8 +/- 0.3) x 10(9) M-circle dot, placing it on the sequence of normal starforming galaxies in an M-gas-star-formation rate (SFR) plane. The molecular hydrogen column density at the location of SN 2017egm is higher than that of the Type II SN PTF10bgl, which is also located in the same host galaxy, and those of other Type II and la SNe located in different galaxies, suggesting that SLSNe-I have a preference for a dense molecular gas environment. On the other hand, the column density at the location of SN 2017egm is comparable to those of Type lbc SNe. The surface densities of molecular gas and the SFR at the location of SN 2017egm are consistent with those of spatially resolved local star-forming galaxies and follow the Schmidt-Kennicutt relation. These facts suggest that SLSNe-I can occur in environments with the same star-formation mechanism as in normal star-forming galaxies.
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页数：6
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