Bryce, H.M., Hendry, M.A. and Valls-Gabaud, D. (2002) Gravitational microlensing as a test of stellar model atmospheres. Astronomy and Astrophysics, 388(1), L1-L4. (doi: 10.1051/0004-6361:20020507)
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Publisher's URL: http://dx.doi.org/10.1051/0004-6361:20020507
Abstract
We present calculations illustrating the potential of gravitational microlensing to discriminate between classical models of stellar surface brightness profiles and the computed ""Next Generation"" models of Hauschildt et al. (1999). These spherically-symmetric models include a much improved treatment of molecular lines in the outer atmospheres of cool giants - stars which are very typical sources in Galactic bulge microlensing events. We show that the microlensing signatures of intensively monitored point and fold caustic crossing events are readily able to distinguish between NextGen and the classical models, provided a photometric accuracy of 0.01 mag is reached. This accuracy is now routinely achieved by alert networks, and hence current observations can discriminate between such model atmospheres, providing a unique insight on stellar photospheres.
Item Type: | Articles (Letter) |
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Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Hendry, Professor Martin |
Authors: | Bryce, H.M., Hendry, M.A., and Valls-Gabaud, D. |
College/School: | College of Science and Engineering > School of Physics and Astronomy |
Journal Name: | Astronomy and Astrophysics |
Publisher: | EDP Sciences |
ISSN: | 0004-6361 |
ISSN (Online): | 1432-0746 |
Copyright Holders: | Copyright © 2002 EDP Sciences |
First Published: | First published in Astronomy and Astrophysics 388(1):L1-L4 |
Publisher Policy: | Reproduced in accordance with the copyright policy of the publisher |
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