1999A&A...344L..79K

Query : 1999A&A...344L..79K

1999A&A...344L..79K - Astronomy and Astrophysics, volume 344, L79-82 (1999/4-3)

The hidden past of Sakurai's object. Stellar properties before the final helium flash.

KERBER F., KOEPPEN J., ROTH M. and TRAGER S.C.

Abstract (from CDS):

We derive the properties of Sakurai's object before its sudden evolutionary change by studying the remnant ionization of the old planetary nebula (PN) surrounding it. The star must have had a surface temperature of 98000±7000K (95000±7000K). For a distance of 1.5kpc (5.5kpc) the luminosity should have been 25±5L☉ (240±40L☉). The central star thus was highly evolved and had already reached the tip of the white dwarf cooling track. Sakurai's object indeed is an example of a star undergoing a very late helium flash.

Abstract Copyright: ∼

Journal keyword(s): stars: AGB and post-AGB - stars: evolution - stars: Hertzsprung-Russel (HR) and C-M diagrams - ISM: planetary nebulae: individual: Sakurai's object - stars: variables: general

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 PN K 1-27 PN 05 57 02.1748457640 -75 40 22.478040120     16.04 16.27 16.41 sdOHe 87 0
2 PN LoTr 4 PN 11 52 29.2564204824 -42 17 38.943700548           O(He) 56 0
3 V* V4334 Sgr CV* 17 52 32.69352 -17 41 08.0160           F2Ia 372 0
4 PN A66 58 PN 19 18 20.476 +01 46 59.62           [WC4] 315 0

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