1997A&A...321L..17A

Query : 1997A&A...321L..17A

1997A&A...321L..17A - Astronomy and Astrophysics, volume 321L17-20 (1997/5-2)

A stellar endgame - the born-again Sakurai's object.

ASPLUND M., GUSTAFSSON B., LAMBERT D.L. and RAO N.K.

Abstract (from CDS):

The surface chemical composition of this remarkable star shows that it is hydrogen-deficient, carbon-rich and enriched in the light s-process elements. Spectra taken in May and October 1996 indicate a decrease in the surface hydrogen abundance by 0.7dex in five months along with an increase in the abundances of Li, Sr, Y and Zr. The abundance changes are in agreement with the hypothesis of the star being a rapidly evolving "born-again" AGB star experiencing a final He-shell flash, similar to FGSge. The 12C/13C ratio in October is very low, also suggesting hydrogen ingestion. By chemical composition, Sakurai's object resembles the R Coronae Borealis (RCrB) stars.

Abstract Copyright: ∼

Journal keyword(s): stars: individual: Sakurai's object - Stars: evolution - Stars: AGB and post-AGB - Stars: abundances - Stars: variables: other - stars: individual: FG Sge

Simbad objects: 13

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Number of rows : 13
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 SV* HV 5967 PN 05 36 20.7215081304 -67 18 07.658262756 15.56 16.225 14.948   16.558 [WN4.5:] 147 0
2 PN A66 30 PN 08 46 53.4639874872 +17 52 46.369394580   14.23 14.30 13.47   [WC5] 431 0
3 V* DY Cen RC* 13 25 34.0847063328 -54 14 43.129581792     12.00     C-Hd/B5-6Ie 105 0
4 V* V854 Cen RC* 14 34 49.4024471640 -39 33 19.201288284   7.13 11.69     Ce 214 0
5 V* V4334 Sgr CV* 17 52 32.69352 -17 41 08.0160           F2Ia 390 0
6 V* V3795 Sgr RC* 18 13 23.5642449000 -25 46 40.857266928       10.940 10.10 ~ 48 0
7 V* VZ Sgr RC* 18 15 08.5724613648 -29 42 29.491053228   11.15 10.46     ~ 57 0
8 V* V348 Sgr pA* 18 40 19.9290428808 -22 54 29.308207716   12.1       B0/1?I?e 192 0
9 V* V CrA RC* 18 47 32.3096196393 -38 09 32.307864378       10.765   R0 114 0
10 PN A66 58 PN 19 18 20.476 +01 46 59.62           [WC4] 327 0
11 Hen 1-5 pA* 20 11 56.0595568008 +20 20 04.420944132 11.41 10.66 9.45     G8/K0Iae 523 0
12 PN A66 78 PN 21 35 29.3816259120 +31 41 45.449196108   13.04 13.25     [WC5] 336 0
13 V* U Aqr RC* 22 03 19.6990459464 -16 37 35.281076700   12.16 11.17     C-Hd 106 0

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