| Title | Gaia17biu/SN 2017egm in NGC 3191: The Closest Hydrogen-poor Superluminous Supernova to Date Is in a "Normal," Massive, Metal-rich Spiral Galaxy |
| Authors | Bose, Subhash Dong, Subo Pastorello, A. Filippenko, Alexei V. Kochanek, C. S. Mauerhan, Jon Romero-Canizales, C. Brink, Thomas G. Chen, Ping Prieto, J. L. Post, R. Ashall, Christopher Grupe, Dirk Tomasella, L. Benetti, Stefano Shappee, B. J. Stanek, K. Z. Cai, Zheng Falco, E. Lundqvist, Peter Mattila, Seppo Mutel, Robert Ochner, Paolo Pooley, David Stritzinger, M. D. Villanueva, S., Jr. Zheng, WeiKang Beswick, R. J. Brown, Peter J. Cappellaro, E. Davis, Scott Fraser, Morgan de Jaeger, Thomas Elias-Rosa, N. |
| Affiliation | Peking Univ, Kavli Inst Astron & Astrophys, Yi He Yuan Rd 5, Beijing 100871, Peoples R China. INAF Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy. Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA. Univ Calif Berkeley, Miller Inst Basic Res Sci, Berkeley, CA 94720 USA. Ohio State Univ, Dept Astron, 140 West 18th Ave, Columbus, OH 43210 USA. Ohio State Univ, Ctr Cosmol & AstroParticle Phys CCAPP, 191 W Woodruff Ave, Columbus, OH 43210 USA. Millennium Inst Astrophys, Santiago, Chile. Univ Diego Portales, Nucleo Astron, Fac Ingn & Ciencias, Av Ej Ercito 441, Santiago, Chile. Post Observ, Lexington, MA 02421 USA. Florida State Univ, Dept Phys, 77 Chieftain Way, Tallahassee, FL 32306 USA. Morehead State Univ, Dept Earth & Space Sci, 235 Martindale Dr,, Morehead, KY 40351 USA. Carnegie Observ, 813 Santa Barbara St, Pasadena, CA 91101 USA. Univ Calif Santa Cruz, UCO Lick Observ, Santa Cruz, CA 95064 USA. Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA. Stockholm Univ, Alballova Univ Ctr, Dept Astron, SE-10691 Stockholm, Sweden. Stockholm Univ, Alballova Univ Ctr, Oskar Klein Ctr, SE-10691 Stockholm, Sweden. Univ Turku, Dept Phys & Astron, Tuorla Observ, Vaisalantie 20, FI-21500 Piikkio, Finland. Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA. Univ Padua, Dipartimento Fis & Astron, Via Marzolo 8, I-35131 Padua, Italy. Trinity Univ, Dept Phys & Astron, One Trinity Pl, San Antonio, TX 78212 USA. Aarhus Univ, Dept Phys & Astron, Ny Munkegade 120, DK-8000 Aarhus C, Denmark. Univ Manchester, Jodrell Bank, Ctr Astrophys, Manchester M13 9PL, Lancs, England. Univ Manchester, Sch Phys & Astron, E MERLIN, Manchester M13 9PL, Lancs, England. Texas A&M Univ, George P & Cynthia Woods Mitchell Inst Fundamental, Dept Phys & Astron, 4242 TAMU, College Stn, TX 77843 USA. Univ Coll Dublin, Sch Phys, OBrien Ctr Sci North, Dublin 4, Ireland. Univ Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr, Juliane Maries Vej 30, DK-2100 Copenhagen, Denmark. Las Cumbres Observ, 6740 Cortona Dr,Ste 102, Goleta, CA 93117 USA. Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA. Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Envi, Weihai 264209, Peoples R China. Seoul Natl Univ, Dept Phys & Astron, Astron Program, Seoul 151742, South Korea. Antelope Hills Observ, 980 Antelope Dr West, Bennett, CO 80102 USA. Bulgarian Acad Sci, Inst Astron, 72 Tsarigradsko Shose Blvd, BU-1784 Sofia, Bulgaria. Bulgarian Acad Sci, NAO, 72 Tsarigradsko Shose Blvd, BU-1784 Sofia, Bulgaria. Liverpool John Moores Univ, Astrophys Res Inst, Liverpool L3 5RF, Merseyside, England. Aerosp Corp, Space Sci Applicat Lab, Mail Stop M2-266,POB 92957, Los Angeles, CA 90009 USA. Vanderbilt Univ, Dept Phys & Astron, 6301 Stevenson Ctr Lane, Nashville, TN 37235 USA. Univ Calif Davis, Dept Phys, Davis, CA 95616 USA. |
| Keywords | galaxies: individual (NGC 3191) supernovae: general supernovae: individual (SN 2017egm Gaia17biu) GAMMA-RAY BURST STAR-FORMING GALAXIES MEDIUM DEEP SURVEY LIGHT CURVES LUMINOUS SUPERNOVAE SPECTROPHOTOMETRIC STANDARDS METALLICITY RELATION PAIR-INSTABILITY DATA REDUCTION HOST GALAXIES |
| Issue Date | 2018 |
| Publisher | ASTROPHYSICAL JOURNAL |
| Citation | ASTROPHYSICAL JOURNAL. 2018, 853(1). |
| Abstract | 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. |
| URI | http://hdl.handle.net/20.500.11897/505707 |
| ISSN | 0004-637X |
| DOI | 10.3847/1538-4357/aaa298 |
| Indexed | SCI(E) |
| Appears in Collections: | 科维理天文与天体物理研究所 |
