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

Abstract

Abstract 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 Mgas = (4.8 ± 0.3) × 109 M⊙, placing it on the sequence of normal star-forming galaxies in an Mgas–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 Ia 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 Ibc 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.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [5]; ORCiD logo [5]; ORCiD logo [1]; ORCiD logo [6]
  1. Institute of Astronomy, Graduate School of Science, The University of Tokyo, 2-21-1 Osawa, Mitaka, Tokyo 181-0015, Japan
  2. National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
  3. Department of Physics, Faculty of Science and Engineering, Konan University, 8-9-1 Okamoto, Kobe, Hyogo 658-8501, Japan, Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583, Japan
  4. Department of Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
  5. Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Yoshida 1677-1, Yamaguchi, Yamaguchi 753-8512, Japan
  6. National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan, Graduate University for Advanced Studies (SOKENDAI), 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1632782
Resource Type:
Published Article
Journal Name:
Publications of the Astronomical Society of Japan
Additional Journal Information:
Journal Name: Publications of the Astronomical Society of Japan Journal Volume: 72 Journal Issue: 4; Journal ID: ISSN 0004-6264
Publisher:
Oxford University Press
Country of Publication:
Japan
Language:
English

Citation Formats

Hatsukade, Bunyo, Morokuma-Matsui, Kana, Hayashi, Masao, Tominaga, Nozomu, Tamura, Yoichi, Niinuma, Kotaro, Motogi, Kazuhiro, Morokuma, Tomoki, and Matsuda, Yuichi. Spatially resolved molecular gas properties of host galaxy of Type I superluminous supernova SN 2017egm. Japan: N. p., 2020. Web. doi:10.1093/pasj/psaa052.
Hatsukade, Bunyo, Morokuma-Matsui, Kana, Hayashi, Masao, Tominaga, Nozomu, Tamura, Yoichi, Niinuma, Kotaro, Motogi, Kazuhiro, Morokuma, Tomoki, & Matsuda, Yuichi. Spatially resolved molecular gas properties of host galaxy of Type I superluminous supernova SN 2017egm. Japan. doi:https://doi.org/10.1093/pasj/psaa052
Hatsukade, Bunyo, Morokuma-Matsui, Kana, Hayashi, Masao, Tominaga, Nozomu, Tamura, Yoichi, Niinuma, Kotaro, Motogi, Kazuhiro, Morokuma, Tomoki, and Matsuda, Yuichi. Wed . "Spatially resolved molecular gas properties of host galaxy of Type I superluminous supernova SN 2017egm". Japan. doi:https://doi.org/10.1093/pasj/psaa052.
@article{osti_1632782,
title = {Spatially resolved molecular gas properties of host galaxy of Type I superluminous supernova SN 2017egm},
author = {Hatsukade, Bunyo and Morokuma-Matsui, Kana and Hayashi, Masao and Tominaga, Nozomu and Tamura, Yoichi and Niinuma, Kotaro and Motogi, Kazuhiro and Morokuma, Tomoki and Matsuda, Yuichi},
abstractNote = {Abstract 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 Mgas = (4.8 ± 0.3) × 109 M⊙, placing it on the sequence of normal star-forming galaxies in an Mgas–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 Ia 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 Ibc 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.},
doi = {10.1093/pasj/psaa052},
journal = {Publications of the Astronomical Society of Japan},
number = 4,
volume = 72,
place = {Japan},
year = {2020},
month = {6}
}

Journal Article:
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DOI: https://doi.org/10.1093/pasj/psaa052

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