Abstract
view Abstract Citations (9) References (10) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Supernova 1987A: The Progenitor Corridor Barkat, Zalman ; Wheeler, J. Craig Abstract The allowed range of progenitor structures for SN 1987A is shown to be a narrow "corridor" in the parameter space of envelope mass, M_env_, and helium enrichment Y. This corridor requires that for envelope masses ~ 10 M_sun_, Y ~ 0.3-0.4, and for envelope masses ~ 5 M_sun_, Y ~ 0.4-0.6, depending somewhat on the precise values of L, T_eff_, and Z. The principle constraints adopted from evolutionary studies are that the hydrogen burning shell be extinct and that the helium burning shell be active. Assuming hydrostatic and thermal equilibrium in the structure beyond the helium burning shell, the progenitor structure of SN 1987A is constrained by determining the parameters which are consistent with the observed properties of SK -69^deg^202. Self-consistency requires that the radius of the helium core or the location of the helium burning shell or both vary with envelope mass and composition even at fixed luminosity, core mass, and stellar radius. Publication: The Astrophysical Journal Pub Date: June 1989 DOI: 10.1086/167550 Bibcode: 1989ApJ...341..925B Keywords: Astrophysics; Stellar Envelopes; Supernova 1987a; Helium; Stellar Composition; Stellar Evolution; Stellar Luminosity; Stellar Mass; Astrophysics; STARS: EVOLUTION; STARS: INDIVIDUAL ALPHANUMERIC: SN 1987A; STARS: INTERIORS; STARS: SUPERNOVAE full text sources ADS | data products NED (2) SIMBAD (1)
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