Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007pasj...59.1127t&link_type=abstract
Publications of the Astronomical Society of Japan, Vol.59, No.6, pp.1127--1140
Astronomy and Astrophysics
Astronomy
6
Stars: Abundances, Stars: Agb And Post-Agb, Stars: Atmospheres, Stars: Evolution, Stars: Individual (Hd 112374, Hd 148743, Hd 161796, Hd 163506, Hd 187203)
Scientific paper
A detailed non-LTE study on the abundances of C, N, O, S, and Zn was carried out for five F-G supergiants of suspected post-AGB candidates with IR excesses (HD 112374, HD 148743, HD 161796, HD 163506, and HD 187203), since these volatile elements can provide the key to inferring the original metallicity as well as an evolution-induced change due to mixing, given that they are free from depletion caused by dust-gas separation. The extent of separation-induced depletion in Fe, estimated by comparing with Zn, turned out to be rather moderate (≲ several tenths dex). The characteristics of the C, N, and O abundances do not appear to be very different from the case of the first dredge-up in normal supergiants (decreased C and enriched N due to the first dredge-up); thus, the specific anomaly related to an advanced post-AGB stage so far reported (such as elevated C and O) could not be clearly confirmed.
Aikawa Toshiki
Hashimoto Osamu
Kawanomoto Satoshi
Taguchi Hikaru
Takeda Yoichi
No associations
LandOfFree
Abundances of Volatile Elements in Post-AGB Candidates does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Abundances of Volatile Elements in Post-AGB Candidates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Abundances of Volatile Elements in Post-AGB Candidates will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1025215