Multiwavelength observations of RV Tauri stars II. U Monocerotis

Details Multiwavelength observations of RV Tauri stars II. U Monocerotis Multiwavelength observations of RV Tauri stars II. U Monocerotis

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...287..852s&link_type=abstract

Astronomy and Astrophysics 287, 852-865 (1994)

Astronomy and Astrophysics

Astrophysics

3

Stars: Chromospheres, Stars: Circumstellar Matter, Stars: Mass-Loss, Stars: Post-Agb, Stars: Indvidual: U Mon

Scientific paper

We present ultraviolet spectroscopy, and optical and infrared photometry, of the RV variable U Mon. The MgII emission in this object seems to be chromospheric, with small variations in profile accompanying pulsational variations. The wavelengths of narrow absorption features associated with the MgII emission are essentially constant in time, and seem to be associated with cool circumstellar shell and a steady wind. We conclude that there is no evidence of binarity in U Mon, and that the long-term behaviour of the light curve is associated with R CrB-like ejection of clouds of absorbing material.

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