2001A&A...367..506A


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.14CEST19:48:00

2001A&A...367..506A - Astronomy and Astrophysics, volume 367, 506-512 (2001/2-4)

Early time optical spectroscopy of supernova SN 1998S.

ANUPAMA G.C., SIVARANI T. and PANDEY G.

Abstract (from CDS):

We present medium-resolution optical spectra of the type II supernova SN 1998S obtained during the pre-maximum, maximum and early decline phases. The early decline spectra show complex Balmer line profiles: a narrow P-Cygni emission feature superimposed on a broad emission. The narrow emission has a redshift similar to that of the host galaxy, indicating its origin from a pre-supernova circumstellar material. The Hα luminosity of the broad component implies a shell mass of ∼0.1M for the supernova ejecta, while the luminosity of the narrow component implies a mass loss rate of 10–4M/yr for the precursor. The photospheric temperature of the supernova shell decreased from a value of 18400±2900K on day 17 to a value of 7500±1200K on day 44. The observations indicate SN 1998S belongs to type IIn supernovae where the supernova ejecta dynamically interact with a pre-supernova circumstellar material.

Abstract Copyright:

Journal keyword(s): supernovae: general - supernovae: individual (SN 1998S)

Simbad objects: 6

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Number of rows : 6

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 SN 1984E SN* 10 14 11.0 +03 28 12   15.2       SNIIL 67 1
2 SN 1988Z SN* 10 51 50.10 +16 00 00.5   16.8       SNIIn 337 1
3 SN 1998S SN* 11 46 06.13 +47 28 55.4     12.2     SNIIn 377 1
4 NGC 3877 GiG 11 46 07.782 +47 29 40.20   11.8       ~ 276 0
5 SN 1987F SN* 12 41 37.46 +26 04 28.3   15.3       SNIIn 85 1
6 SN 1983K SN* 12 49 12.23 -08 37 41.5   12.6       SNIIP 79 1

    Equat.    Gal    SGal    Ecl

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2020.08.14-19:48:00

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