2000A&A...354..557C


Query : 2000A&A...354..557C

2000A&A...354..557C - Astronomy and Astrophysics, volume 354, 557-566 (2000/2-2)

The nature of SN 1997D: low-mass progenitor and weak explosion.

CHUGAI N.N. and UTROBIN V.P.

Abstract (from CDS):

We analyzed the spectra and light curve of the peculiar type II-P supernova 1997D to recover ejecta parameters. The optimal hydrodynamical model of SN 1997D, which meets observational constraints at the photospheric epoch, suggests a low explosion energy of about 1050erg, ejecta mass around 6M, and presupernova radius near 85R. We confirm the previous result by Turatto et al. (1998ApJ...498L.129T) that the ejecta contain a very low amount of radioactive 56Ni (≃0.002M). Modelling the nebular spectrum supports the hydrodynamical model and permits us to estimate the mass of freshly synthesized oxygen (0.02-0.07M). Combined with the basic results of stellar evolution theory the obtained parameters of SN 1997D imply that the progenitor was a star from the 8-12M mass range at the main sequence. The fact that at least some progenitors from this mass range give rise to core-collapse supernovae with a low kinetic energy (≃1050erg) and low amount of radioactive 56Ni (≃0.002M) has no precedent and imposes important constraints on the explosion mechanism. We speculate that the galactic supernovae 1054 and 1181 could be attributed to SN 1997D-like events.

Abstract Copyright:

Journal keyword(s): supernovae: general - supernovae: individual: SN 1997D - ISM: supernova remnants

Simbad objects: 8

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Number of rows : 8
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 SNR G130.7+03.1 SNR 02 05 37.0 +64 49 42           ~ 588 4
2 NGC 1536 IG 04 10 59.838 -56 28 49.64   13.29 13.15 12.19   ~ 77 0
3 SN 1997D SN* 04 11 01.00 -56 29 56.0       16.3   SNIIpec 168 1
4 V* CM Tau Psr 05 34 31.9474694616 +22 00 52.153698024           ~ 5027 0
5 M 1 SNR 05 34 32 +22 00.8           ~ 5903 1
6 SN 1987A SN* 05 35 28.020 -69 16 11.07           SNIIpec 4691 2
7 SN 1993J SN* 09 55 24.77476 +69 01 13.7026   10.8 12.0     SNIIb 1325 1
8 SN 1988Z SN* 10 51 50.10 +16 00 00.5   16.8       SNIIn 352 1

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2022.05.20-19:02:32

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