2000A&AS..144..219L


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.23CEST06:07:23

2000A&AS..144..219L - Astron. Astrophys., Suppl. Ser., 144, 219-225 (2000/June-1)

The supernova 1998S in NGC 3877: Another supernova with Wolf-Rayet star features in pre-maximum spectrum.

LIU Q.-Z., HU J.-Y., HANG H.-R., QIU Y.-L., ZHU Z.-X. and QIAO Q.-Y.

Abstract (from CDS):

We present the BVR photometry and the spectra of SN 1998S taken about four months after discovery, beginning a week and 6 days before maximum brightness respectively. The light curves show a steep and linear decline, which are consistent with those of SN 1979C and are typical of a SN II-L. An absolute magnitude at maximum MB0≤-18.7 is derived, which is more than 2 mag brighter than the regular SNII and indicates this SN is a member of the rare class of Bright SNII. The B-V color evolution at early epoch is also typical of linear SN II with a maximum (B-V) value of +1.35, similar to the typical Type II-L SN 1980K. The spectral evolution is typical for SN II-L, very similar to that of the SN 1979C. They, however, showed some differences. The spectrum before maximum showed high-ionization N III and He II emission lines superposed on a strong blue continuum. Around the maximum light the high-ionization emission lines disappeared, leaving weak H I, He I emission lines, which are similar to those of SN 1983K. The extraordinary feature on the post-maximum spectra is the narrow emission P Cygni profile superposed on a much broader P Cygni structure in all five Balmer lines, Hα to Hε. Such feature is reminiscent of the post-maximum spectra of SN 1984E. Rapid spectral and photometric evolution, together with the presence of obvious P Cygni profile, suggests that SN 1998S is more consistent with the nature of a type II-L supernova than that of a IIn supernova, although narrow lines are present on the premaximum spectrum.

Abstract Copyright:

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

Simbad objects: 13

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Number of rows : 13

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 SN 1990K SN* 00 34 13.98 -27 47 45.9     14     SN.II 54 1
2 SN 1994ak SN* 09 14 01.47 +40 06 21.5     16.3     SN.IIn 31 1
3 SN 1984E SN* 10 14 11.0 +03 28 12   15.2       SN.IIL 67 1
4 SN 1988Z SN* 10 51 50.10 +16 00 00.5   16.8       SN.IIn 325 1
5 SN 1998S SN* 11 46 06.13 +47 28 55.4     12.2     SN.IIn 360 1
6 NGC 3877 GiG 11 46 07.782 +47 29 40.20   11.8       ~ 268 0
7 M 100 AGN 12 22 54.9318850854 +15 49 20.294302163 10.04 10.05 9.35     ~ 1618 2
8 SN 1979C SN* 12 22 58.58 +15 47 52.7   11.6       SN.IIL 539 1
9 SN 1983K SN* 12 49 12.23 -08 37 41.5   12.6       SN.IIP 77 1
10 SN 1994Y SN* 13 55 36.90 +40 27 53.4   14.52       SN.IIn 61 1
11 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2182 2
12 SN 1980K SN* 20 35 30.07 +60 06 23.7   11.6       SN.IIL 423 1
13 SN 1959D SN* 22 37 01.82 +34 25 08.5   13.8       SN.IIL 60 1

    Equat.    Gal    SGal    Ecl

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2019.10.23-06:07:23

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