Volume 426, Number 1, October IV 2004
|Page(s)||145 - 149|
|Section||Interstellar and circumstellar matter|
|Published online||05 October 2004|
The progenitor of the “born-again” core V605 Aql and the relation to its younger twin V4334 Sgr*
Institut für Astrophysik der Universität Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria e-mail: firstname.lastname@example.org
Accepted: 22 June 2004
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.
Key words: stars: AGB and post-AGB / stars: evolution / ISM: planetary nebulae: individual: Abell 58 / stars: individual: V605 Aql, V4334 Sgr
© ESO, 2004
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.