Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002a%26a...392..553v&link_type=abstract
Astronomy and Astrophysics, v.392, p.553-562 (2002)
Astronomy and Astrophysics
Astrophysics
44
Stars: Horizontal-Branch, Subdwarfs, Stars: Mass-Loss, Stars: Winds, Outflows, Stars: Evolution, Galaxy: Globular Clusters: General
Scientific paper
We predict mass-loss rates for the late evolutionary phases of low-mass stars, with special emphasis on the consequences for the morphology of the Horizontal Branch (HB). We show that the computed rates, as predicted by the most plausible mechanism of radiation pressure on spectral lines, are too low to produce EHB/sdB stars. This invalidates the scenario recently outlined by Yong et al. (2000) to create these objects by mass loss on the HB. We argue, however, that mass loss plays a role in the distribution of rotational velocities of hot HB stars, and may - together with the enhancement of heavy element abundances due to radiative levitation - provide an explanation for the so-called ``low gravity'' problem. The mass loss recipe derived for hot HB (and extreme HB, sdB, sdOB) stars may also be applied to post-HB (AGB-manqué, UV-bright) stars over a range in effective temperatures between 12 500-40 000 K.
Cassisi Santi
Vink Jorick S.
No associations
LandOfFree
Hot horizontal branch stars: Predictions for mass loss. Winds, rotation, and the low gravity problem 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 Hot horizontal branch stars: Predictions for mass loss. Winds, rotation, and the low gravity problem, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hot horizontal branch stars: Predictions for mass loss. Winds, rotation, and the low gravity problem will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1311110