Microlensing of circumstellar envelopes. II. Emission lines from radial and azimuthal flow during fold caustic crossings

Details Microlensing of circumstellar envelopes. II. Emission lines from radial and azimuthal flow during fold caustic crossings Microlensing of circumstellar envelopes. II. Emission lines from radial and azimuthal flow during fold caustic crossings

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003a%26a...401..339b&link_type=abstract

Astronomy and Astrophysics, v.401, p.339-346 (2003)

Astronomy and Astrophysics

Astrophysics

2

Gravitational Lensing, Stars: Circumstellar Matter

Scientific paper

This paper examines the line profile evolution due to bulk motion in circumstellar envelopes during microlensing fold caustic crossing events. These events have recently been shown to be a sensitive probe of stellar surface brightness profiles, thus providing a means - through both photometric and spectroscopic observations - to constrain and test stellar atmosphere models. Here it is demonstrated, through the examination of simplified line profiles, that spectroscopic studies of fold caustic crossings could also prove to be a powerful diagnostic of bulk motion in circumstellar envelopes.

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