ASASSN-15lh: A highly super-luminous supernova
- 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, FILOMENA
- 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.
DOIAbstract
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) × 1045 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 radiate...
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