2017MNRAS.469.4649M


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.18CEST15:30:34

2017MNRAS.469.4649M - Mon. Not. R. Astron. Soc., 469, 4649-4664 (2017/August-3)

The quest for blue supergiants: binary merger models for the evolution of the progenitor of SN 1987A.

MENON A. and HEGER A.

Abstract (from CDS):

We present the results of a systematic stellar evolution study of binary mergers for blue supergiant (BSG) progenitors of Type II supernovae. In particular, these are the first evolutionary models that can simultaneously reproduce nearly all observational aspects of the progenitor of SN 1987A, Sk -69 °202, such as its position in the Hertzsprung-Russell diagram, the enrichment of helium and nitrogen in the triple-ring nebula and its lifetime before its explosion. The merger model, based on the one proposed by Podsiadlowski, Joss and Hsu, and Podsiadlowski, Morris and Ivanova, consists of a main-sequence secondary star that dissolves completely in the common envelope of the primary red supergiant at the end of their merger. We empirically explore a large initial parameter space - primary masses (15, 16 and 17 M), secondary masses (2, 3,..., 8 M) and different depths up to which the secondary penetrates the He core of the primary during the merger. The evolution of the merged star is continued until just before iron-core collapse, and the surface properties of the 84 pre-supernova models (of 16-23 M) computed have been made available in this work. Within the parameter space studied, the majority of the models are compact, hot BSGs with effective temperature >12 kK and radii of 30-70 R, of which six match the observational constraints of Sk -69 °202.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): binaries: general - supergiants - supergiants

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 7

goto Full paper

goto View the reference in ADS

Number of rows : 7

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 LHA 115-S 6 s*b 00 46 55.0295095056 -73 08 34.139503944 12.14 13.02 12.91   12.52 B0/0.5[e] 78 1
2 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15360 1
3 SN 1987A SN* 05 35 28.020 -69 16 11.07           SNIIpec 4586 2
4 [SBW2007] 1 ISM 10 40 19.3813745314 -59 49 09.885316446     12.7     B1Iab 33 1
5 * eta Car Em* 10 45 03.545808 -59 41 03.95124 6.37 7.03 6.48 4.90 4.41 OBepec 2268 0
6 IRAS 15127-5811 s*b 15 16 41.0006516530 -58 22 25.958980212   15.34 13.40 12.500 10.91 B1Ia 9 0
7 HD 168625 s*b 18 21 19.5486475779 -16 22 26.077308888 10.15 9.78 8.37 8.76   B6Iap 258 2

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2017MNRAS.469.4649M and select 'bookmark this link' or equivalent in the popup menu


2021.05.18-15:30:34

© Université de Strasbourg/CNRS

    • Contact