2000-2008 UBV observations of HD 179821 (Arkhipova+, 2009)

Details 2000-2008 UBV observations of HD 179821 (Arkhipova+, 2009) 2000-2008 UBV observations of HD 179821 (Arkhipova+, 2009)

Nov 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009ycat..90350846a&link_type=abstract

VizieR On-line Data Catalog: J/PAZh/35/846. Originally published in: 2009PAZh...35..846A; 2009AstL...35..764A

Physics

Stars: Variable, Stars: Supergiant, Photometry: Ubv

Scientific paper

We present new results of our UBV photometry for HD 179821=V1427 Aql, an F supergiant with an infrared excess, from 2000 to 2008. The semiregular low-amplitude (Δ=0.05-0.20mag) photometric variability of the star with a cycle period from 130 to 200 days is caused by pulsations, along with the instability of a variable stellar wind. V1427 Aql also exhibits a long-term trend in the brightness and colors that is probably attributable to a change in the stellar temperature as a result of mass loss episodes, which cause variations in the continuum formation level. We present the results of our JHKLM photometry for V1427 Aql in 1992-2008.
(1 data file).

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