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Gaia17biu/sn 2017egm In Ngc 3191

Title: Gaia17biu/sn 2017egm In Ngc 3191: The Closest Hydrogen-poor Superluminous Supernova To Date Is In A "normal," Massive, Metal-rich Spiral Galaxy.
Name(s): Bose, Subhash, author
Dong, Subo, author
Pastorello, A., author
Filippenko, Alexei V., author
Kochanek, C. S., author
Mauerhan, Jon, author
Romero-Canizales, C., author
Brink, Thomas G., author
Chen, Ping, author
Prieto, J. L., author
Post, R., author
Ashall, Christopher, author
Grupe, Dirk, author
Tomasella, L., author
Benetti, Stefano, author
Shappee, B. J., author
Stanek, K. Z., author
Cai, Zheng, author
Falco, E., author
Lundqvist, Peter, author
Mattila, Seppo, author
Mutel, Robert, author
Ochner, Paolo, author
Pooley, David, author
Stritzinger, M. D., author
Villanueva, S., author
Zheng, WeiKang, author
Beswick, R. J., author
Brown, Peter J., author
Cappellaro, E., author
Davis, Scott, author
Fraser, Morgan, author
de Jaeger, Thomas, author
Elias-Rosa, N., author
Gall, C., author
Gaudi, B. Scott, author
Herczeg, Gregory J., author
Hestenes, Julia, author
Holoien, T. W.-S., author
Hosseinzadeh, Griffin, author
Hsiao, E. Y., author
Hu, Shaoming, author
Jaejin, Shin, author
Jeffers, Ben, author
Koff, R. A., author
Kumar, Sahana, author
Kurtenkov, Alexander, author
Lau, Marie Wingyee, author
Prentice, Simon, author
Reynolds, T., author
Rudy, Richard J., author
Shahbandeh, Melissa, author
Somero, Auni, author
Stassun, Keivan G., author
Thompson, Todd A., author
Valenti, Stefano, author
Woo, Jong-Hak, author
Yunus, Sameen, author
Type of Resource: text
Genre: Journal Article
Journal Article
Date Issued: 2018-01-20
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: 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.
Identifier: FSU_libsubv1_wos_000423305600008 (IID), 10.3847/1538-4357/aaa298 (DOI)
Keywords: supernovae: general, luminous supernovae, pair-instability, host galaxies, data reduction, galaxies: individual (NGC 3191), gamma-ray burst, light curves, medium deep survey, metallicity relation, spectrophotometric standards, star-forming galaxies, supernovae: individual (SN 2017egm Gaia17biu)
Publication Note: The publisher's version of record is available at
Persistent Link to This Record:
Host Institution: FSU
Is Part Of: Astrophysical Journal.
Issue: iss. 1, vol. 853

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Bose, S., Dong, S., Pastorello, A., Filippenko, A. V., Kochanek, C. S., Mauerhan, J., … Yunus, S. (2018). Gaia17biu/sn 2017egm In Ngc 3191: The Closest Hydrogen-poor Superluminous Supernova To Date Is In A "normal," Massive, Metal-rich Spiral Galaxy. Astrophysical Journal. Retrieved from