Astronomy. ASASSN-15lh: A highly super-luminous supernova

Astronomy. ASASSN-15lh: A highly super-luminous supernova

We report the discovery of ASASSN-15lh (SN 2015L), which we interpret as the most luminous supernova yet found. At redshift z = 0.2326, ASASSN-15lh reached an absolute magnitude of Mu ,AB = -23.5 ± 0.1 and bolometric luminosity Lbol = (2.2 ± 0.2) × 10(45) ergs s(-1), which is more than twice as lumi...

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Veröffentlicht in:Science (American Association for the Advancement of Science) 2016-01, Vol.351 (6270), p.257-260
Hauptverfasser: Dong, Subo, Shappee, B J, Prieto, J L, Jha, S W, Stanek, K Z, Holoien, T W-S, Kochanek, C S, Thompson, T A, Morrell, N, Thompson, I B, Basu, U, Beacom, J F, Bersier, D, Brimacombe, J, Brown, J S, Bufano, F, Chen, Ping, Conseil, E, Danilet, A B, Falco, E, Grupe, D, Kiyota, S, Masi, G, Nicholls, B, Olivares E, F, Pignata, G, Pojmanski, G, Simonian, G V, Szczygiel, D M, Woźniak, P R
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Sprache:eng
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Zusammenfassung:We report the discovery of ASASSN-15lh (SN 2015L), which we interpret as the most luminous supernova yet found. At redshift z = 0.2326, ASASSN-15lh reached an absolute magnitude of Mu ,AB = -23.5 ± 0.1 and bolometric luminosity Lbol = (2.2 ± 0.2) × 10(45) ergs s(-1), which is more than twice as luminous as any previously known supernova. It has several major features characteristic of the hydrogen-poor super-luminous supernovae (SLSNe-I), whose energy sources and progenitors are currently poorly understood. In contrast to most previously known SLSNe-I that reside in star-forming dwarf galaxies, ASASSN-15lh appears to be hosted by a luminous galaxy (MK ≈ -25.5) with little star formation. In the 4 months since first detection, ASASSN-15lh radiated (1.1 ± 0.2) × 10(52) ergs, challenging the magnetar model for its engine.
ISSN:1095-9203
DOI:10.1126/science.aac9613