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Gaia17biu/SN 2017eg...
Gaia17biu/SN 2017egm in NGC 3191 : The Closest Hydrogen-poor Superluminous Supernova to Date Is in a Normal, Massive, Metal-rich Spiral Galaxy
- Article/chapterEnglish2018
Publisher, publication year, extent ...
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2018-01-23
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American Astronomical Society,2018
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printrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:su-153823
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https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-153823URI
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https://doi.org/10.3847/1538-4357/aaa298DOI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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Hydrogen-poor superluminous supernovae (SLSNe-I) have been predominantly found in low-metallicity, star-forming dwarf galaxies. Here we identify Gaia17biu/SN 2017egm as an SLSN-I occurring in a normal spiral galaxy (NGC 3191) in terms of stellar mass (several times 10(10) M-circle dot) and metallicity (roughly solar). At redshift z = 0.031, Gaia17biu is also the lowest-redshift SLSN-I to date, and the absence of a larger population of SLSNe-I in dwarf galaxies of similar redshift suggests that metallicity is likely less important to the production of SLSNe-I than previously believed. With the smallest distance and highest apparent brightness for an SLSN-I, we are able to study Gaia17biu in unprecedented detail. Its pre-peak near-ultraviolet to optical color is similar to that of Gaia16apd and among the bluest observed for an SLSN-I, while its peak luminosity (M-g = -21 mag) is substantially lower than that of Gaia16apd. Thanks to the high signal-to-noise ratios of our spectra, we identify several new spectroscopic features that may help to probe the properties of these enigmatic explosions. We detect polarization at the similar to 0.5% level that is not strongly dependent on wavelength, suggesting a modest, global departure from spherical symmetry. In addition, we put the tightest upper limit yet on the radio luminosity of an SLSN-I with < 5.4 x 10(26) erg s(-1) Hz(-1) at 10 GHz, which is almost a factor of 40 better than previous upper limits and one of the few measured at an early stage in the evolution of an SLSN-I. This limit largely rules out an association of this SLSN-I with known populations of gamma-ray-burst-like central engines.
Subject headings and genre
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Dong, Subo
(author)
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Pastorello, A.
(author)
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Filippenko, Alexei V.
(author)
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Kochanek, C. S.
(author)
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Mauerhan, Jon
(author)
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Romero-Canizales, C.
(author)
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Brink, Thomas G.
(author)
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Chen, Ping
(author)
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Prieto, J. L.
(author)
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Post, R.
(author)
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Ashall, Christopher
(author)
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Grupe, Dirk
(author)
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Tomasella, L.
(author)
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Benetti, Stefano
(author)
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Shappee, B. J.
(author)
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Stanek, K. Z.
(author)
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Cai, Zheng
(author)
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Falco, E.
(author)
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Lundqvist, PeterStockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)lundq
(author)
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Mattila, Seppo
(author)
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Mutel, Robert
(author)
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Ochner, Paolo
(author)
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Pooley, David
(author)
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Stritzinger, M. D.
(author)
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Villanueva, S.
(author)
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Zheng, WeiKang
(author)
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Beswick, R. J.
(author)
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Brown, Peter J.
(author)
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Cappellaro, E.
(author)
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Davis, Scott
(author)
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Fraser, Morgan
(author)
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de Jaeger, Thomas
(author)
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Elias-Rosa, N.
(author)
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Gall, C.
(author)
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Gaudi, B. Scott
(author)
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Herczeg, Gregory J.
(author)
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Hestenes, Julia
(author)
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Holoien, T. W. -S.
(author)
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Hosseinzadeh, Griffin
(author)
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Hsiao, E. Y.
(author)
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Hu, Shaoming
(author)
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Jaejin, Shin
(author)
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Jeffers, Ben
(author)
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Koff, R. A.
(author)
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Kumar, Sahana
(author)
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Kurtenkov, Alexander
(author)
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Lau, Marie Wingyee
(author)
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Prentice, Simon
(author)
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Reynolds, T.
(author)
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Rudy, Richard J.
(author)
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Shahbandeh, Melissa
(author)
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Somero, Auni
(author)
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Stassun, Keivan G.
(author)
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Thompson, Todd A.
(author)
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Valenti, Stefano
(author)
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Woo, Jong-Hak
(author)
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Yunus, Sameen
(author)
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Stockholms universitetInstitutionen för astronomi
(creator_code:org_t)
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In:Astrophysical Journal: American Astronomical Society853:10004-637X1538-4357
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Bose, Subhash
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Dong, Subo
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Pastorello, A.
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Filippenko, Alex ...
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Kochanek, C. S.
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Mauerhan, Jon
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Romero-Canizales ...
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Brink, Thomas G.
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Chen, Ping
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Prieto, J. L.
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Post, R.
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Ashall, Christop ...
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Grupe, Dirk
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Tomasella, L.
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Benetti, Stefano
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Shappee, B. J.
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Stanek, K. Z.
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Cai, Zheng
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Falco, E.
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Lundqvist, Peter
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Mattila, Seppo
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Mutel, Robert
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Ochner, Paolo
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Pooley, David
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Stritzinger, M. ...
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Villanueva, S.
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Zheng, WeiKang
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Beswick, R. J.
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Brown, Peter J.
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Cappellaro, E.
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Davis, Scott
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Fraser, Morgan
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de Jaeger, Thoma ...
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Elias-Rosa, N.
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Gall, C.
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Gaudi, B. Scott
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Herczeg, Gregory ...
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Hestenes, Julia
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Holoien, T. W. - ...
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Hosseinzadeh, Gr ...
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Hsiao, E. Y.
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Hu, Shaoming
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Jaejin, Shin
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Jeffers, Ben
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Koff, R. A.
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Kumar, Sahana
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Kurtenkov, Alexa ...
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Lau, Marie Wingy ...
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Prentice, Simon
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Reynolds, T.
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Rudy, Richard J.
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Shahbandeh, Meli ...
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Somero, Auni
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Stassun, Keivan ...
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Thompson, Todd A ...
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Valenti, Stefano
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Woo, Jong-Hak
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