Multiband Photometry of V725 Sagittarii

Details Multiband Photometry of V725 Sagittarii Multiband Photometry of V725 Sagittarii

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010pasp..122..144b&link_type=abstract

Publications of the Astronomical Society of the Pacific, Volume 122, issue 888, pp.144-148

Astronomy and Astrophysics

Astronomy

Stars

Scientific paper

V725 Sgr is a rather peculiar variable that showed a period increase during part of the twentieth century. Its behavior is attributed to rapid stellar evolution. V725 Sgr was monitored in V, R, I and J, H, K with the REM telescope, on La Silla, from 2008 August to 2009 November. Its light variation does not show a well-defined cyclic behavior. Its current is similar to what it was 30-40 yrs ago. Its published motion suggests that V725 Sgr is located at a few kiloparsecs from the Sun. This implies that V725 Sgr is a giant rather than a supergiant star. From its mean colors we conclude that V725 Sgr is now an irregular variable of spectral type ˜K4 III.
Based on observations obtained with the REM Telescope, INAF Chile.

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