Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999cha%26a..23..189z&link_type=abstract
Chinese Astronomy and Astrophysics, Volume 23, Issue 2, p. 189-194.
Astronomy and Astrophysics
Astrophysics
4
Scientific paper
The equations of wind accretion and variation of orbital parameters are rederived under conservation of total (rather than tangential) angular momentum, and applied to extrinsic AGB stars. These equations, together with nucleosynthesis in intrinsic AGB stars, are used to calculate heavy element over-abundance for the scenario of successive pulses and mixing. The results show that wind accretion pertains when the orbital period is longer than 1300 d or 1600 d according as the initial mass of the Ba star is 2.5Msolar or 1.3Msolar, while cataclysmic variables will result if the period is shorter than 600 d in either case. The results are advantageous for interpreting a) the observations on the over-abundance and orbital parameters, b) the observed lower limit of 600 d in the period of extrinsic S stars, and c) the observed fact that the mean eccentricity of Ba stars is greater than the mean eccentricities of extrinsic S stars and CH stars.
Liang Yan-Chun
Liu Jun-Hong
Peng Qiu-he
Zhang Bo
No associations
LandOfFree
Model of wind accretion in extrinsic AGB stars under conservation of total angular momentum 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 Model of wind accretion in extrinsic AGB stars under conservation of total angular momentum, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Model of wind accretion in extrinsic AGB stars under conservation of total angular momentum will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1029404