Apr 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aan...375....1h&link_type=abstract
AAVSO Alert Notice 375
Physics
V576 Car, Multiwavelength Observations, Infrared Source, Post-Agb Star
Scientific paper
V576 Car (AUID 000-BFQ-470) is a star of interest and a multiwavelength observing campaign is being initiated by the AAVSO and Laszlo Kiss. A paper by Couch, Lloyd Evans, and Sarre 2003MNRAS.346..153C indicates that this star is an infrared source (IRAS 08182-6000), and at the time of the paper, had been increasing in brightness for over a decade. They classified it as a post-AGB star surrounded by cool dust. The ASAS light curve supports a continued brightness increase. V576 Car has a proper motion of 136mas/yr in RA and -22mas/yr in Dec, so moving pretty rapidly to the east. The brightness behavior is reminiscent of FG Sge, which also consistently increased in brightness during its fast evolution through the upper part of the Hertzsprung-Russell Diagram. The campaign is being established as no time series to look for quasi-periodic oscillations have been acquired; no recent spectra are available; no obvious non-photographic deep image is available. We would suggest that a couple of observers do some time series photometry, but everyone keep it on their observing program, observing it nightly at in at least V-band; use the full UBVRI set if possible. Those with spectroscopic capability should acquire a spectra about once/week. Observations should be submitted to the AAVSO International Database as V576 CAR.
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