2013A&A...550L...7G


Query : 2013A&A...550L...7G

2013A&A...550L...7G - Astronomy and Astrophysics, volume 550, L7-7 (2013/2-1)

Massive star evolution: luminous blue variables as unexpected supernova progenitors.

GROH J.H., MEYNET G. and EKSTROEM S.

Abstract (from CDS):

Stars more massive than about 8M end their lives as a supernova (SN), an event of fundamental importance Universe-wide. Theoretically, these stars have been expected to be either at the red supergiant, blue supergiant, or Wolf-Rayet stage before the explosion. We performed coupled stellar evolution and atmospheric modeling of stars with initial masses between 20M and 120M. We found that the 20M and 25M rotating models, before exploding as SN, have spectra that do not resemble any of the aforementioned classes of massive stars. Rather, they have remarkable similarities with rare, unstable massive stars known as luminous blue variables (LBV). While observations show that some SNe seem to have had LBVs as progenitors, no theoretical model had yet predicted that a star could explode at this stage. Our models provide theoretical support for relatively low-luminosity LBVs exploding as SN in the framework of single stellar evolution. This is a significant shift in paradigm, meaning that a fraction of LBVs could be the end stage of massive star evolution, rather than a transitory evolutionary phase. We suggest that type IIb SN could have LBV as progenitors, and a prime example could be SN 2008ax.

Abstract Copyright:

Journal keyword(s): stars: evolution - supernovae: general - stars: massive - stars: winds, outflows - stars: fundamental parameters - stars: rotation

Simbad objects: 10

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Number of rows : 10
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 SN 2005gl SN* 00 49 50.02 +32 16 56.8       17.0   SNIIn 143 2
2 SN 2005gj SN* 03 01 11.96 -00 33 13.9   18.6       SNIapec 196 1
3 SN 2006gy SN* 03 17 27.06 +41 24 19.5       14.20   SNIIn 335 1
4 SN 1987A SN* 05 35 28.020 -69 16 11.07           SNIIpec 4859 2
5 HD 90177 s*b 10 22 53.8430096928 -59 37 28.363616256 9.16 9.66 8 8.15   LBV 323 0
6 V* AG Car WR* 10 56 11.5781414448 -60 27 12.810673260 7.00 7.57 6.96 7.73   WN11h 625 0
7 SN 2008ax SN* 12 30 40.80 +41 38 16.1   23.6 23.5 14.1 22.6 SNIIb 253 1
8 HD 316285 s*b 17 48 14.0372119152 -28 00 53.121269592 11.88 11.27 9.60 9.28   B0Ieq 190 2
9 * P Cyg s*b 20 17 47.2020844 +38 01 58.552724 4.66 5.24 4.82 4.28 4.02 B1-2Ia-0ep 1170 1
10 SN 2009ip s*b 22 23 08.26 -28 56 52.4           LBV 339 0

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2023.09.26-01:58:58

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