SN 1998S explained
SN 1998S was a type IIn supernova that was detected in NGC 3877 in March 1998. At the time of discovery, SN 1998S was the brightest type IIn event observed,[1] although later outshone by SN 2010jl.[2]
It was discovered on 1998 March 2.68 UT in NGC 3877 by Z. Wan at a broadband (unfiltered) optical magnitude of +15.2.
Its spectrum showed prominent H and He emission lines with narrow peaks and broad wings, superimposed on a blue continuum. These narrow lines indicate the presence of a dense circumstellar medium (CSM) in the vicinity of the supernova. The high luminosity of SN1998S is due to the interaction of fast material (ejecta) with previously-expelled slowly-expanding material (CSM), which can more effectively convert kinetic energy of ejecta into radiation energy.[3]
External links
Notes and References
- Fassia. A.. Meikle. W. P. S.. Chugai. N.. Geballe. T. R.. Lundqvist. P.. Walton. N. A.. Pollacco. D.. Veilleux. S.. Wright. G. S.. Pettini. M.. Kerr. T.. Puchnarewicz. E.. Puxley. P.. Irwin. M.. Packham. C.. Smartt. S. J.. Harmer. D.. Optical and infrared spectroscopy of the type IIn SN 1998S: days 3-127. Monthly Notices of the Royal Astronomical Society. 11 August 2001. 325. 3. 907–930. 10.1046/j.1365-8711.2001.04282.x. free . astro-ph/0011340 . 2001MNRAS.325..907F . 119514186.
- Ofek . E. O. . Zoglauer . A. . Boggs . S. E. . Barriere . N. M. . Reynolds . S. P. . Fryer . C. L. . Harrison . F. A. . Cenko . S. B. . Kulkarni . S. R. . Gal-Yam . A. . Arcavi . I. . Bellm . E. . Bloom . J. S. . Christensen . F. . Craig . W. W. . 2014-01-06 . SN 2010jl: Optical to hard X-ray observations reveal an explosion embedded in a ten solar mass cocoon . The Astrophysical Journal . 781 . 1 . 42 . 10.1088/0004-637X/781/1/42 . 0004-637X. 1307.2247 . 2014ApJ...781...42O .
- Dessart . Luc . Numerical simulations of super-luminous supernovae of type IIn . MNRAS . 2015 . 2015MNRAS.449.4304D . 1503.05463 . 10.1093/mnras/stv609 . 449 . 4 . 4304–4325. free . 54221511 .
