2004A&A...426..145L


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.08CET08:55:47

2004A&A...426..145L - Astronomy and Astrophysics, volume 426, 145-149 (2004/10-4)

The progenitors of the ``born-again'' core V605 Aql and the relation to its younger twin V4334 Sgr.

LECHNER M.F.M. and KIMESWENGER S.

Abstract (from CDS):

We derived the properties of V605 Aql before the final helium flash pulse by studying its surrounding PN A58. Photoionizing models of our spectral data together with a new distance estimate and a closer look at the recombination timescales lead to a consistent model. Comparing our findings with the only hydrogen-poor twin, namely Sakurai's Object, we conclude that these born-again objects have normal PNe core masses. We are able to prove V605 Aql indeed to be, similar to V4332 Sgr, a very late thermal pulse object and to put constraints on the evolutionary time scales for the transition back to the AGB.

Abstract Copyright:

Journal keyword(s): AGB and post-AGB - stars: evolution - ISM: planetary nebulae: individual: Abell 58 - stars: individual: V605 Aql, V4334 Sgr

Simbad objects: 3

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Number of rows : 3

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 V* V4334 Sgr NL* 17 52 32.69 -17 41 08.0   12.01       F2Ia 320 0
2 PN A66 58 PN 19 18 20.476 +01 46 59.62           [WC4] 283 0
3 Hen 1-5 pA* 20 11 56.06832 +20 20 04.4916 11.41 10.66 9.45     G8/K0Iae 485 1

    Equat.    Gal    SGal    Ecl

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2019.12.08-08:55:47

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