ASASSN-15lh: A Highly Super-Luminous Supernova - INSPIRE

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ASASSN-15lh: A Highly Super-Luminous Supernova

Subo Dong
(
- Peking U., Beijing, KIAA
)
,
B.J. Shappee
(
- Carnegie Inst. Observ.
)
,
J.L. Prieto
(
- Diego Portales U. and
- Millenium Inst. Astro., Santiago
)
,
S.W. Jha
(
- Rutgers U., Piscataway
)
,
K.Z. Stanek
(
- Ohio State U., Dept. Astron. and
- Ohio State U., CCAPP
)

Jul 10, 2015

4 pages

Published in:

Science 351 (2016) 257-260

e-Print:

1507.03010 [astro-ph.HE]

DOI:

10.1126/science.aac9613

View in:

ADS Abstract Service

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Abstract: (arXiv)

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 M_{u,AB} = -23.5+/-0.1 and bolometric luminosity L_bol = (2.2+/-0.2)x 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 (M_K ~ -25.5) with little star formation. In the 4 months since first detection, ASASSN-15lh radiated (1.1+/- 0.2)x10^52 ergs, challenging the magnetar model for its engine.

Note:

Published in the January 15, 2016 Issue of Science Magazine

References(65)

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