Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009arep...53..850b&link_type=abstract
Astronomy Reports, Volume 53, Issue 9, pp.850-856
Astronomy and Astrophysics
Astronomy
97.10.Fy, 97.20.Rp, 95.85.Hp, 95.85.Jq
Scientific paper
Results of JHKLM photometry for the protoplanetary nebula candidate V1027 Cyg obtained in 1991-2008 are reported. In all bands, the brightness variations did not exceed 0.2 m . Estimated linear trends demonstrate no significant changes in the mean brightness and color indices of the object, with the possible exception of the L-M color index, which showed a small decrease. A search for possible periodicities in the brightness variations yielded the most probable period of 237d. A model for a spherically-symmetric dust shell has been calculated based on the photometric results supplemented with data on the mid- and far-infrared fluxes. The estimated mass-loss rate of the star is 1.3 × 10-5 M &sun;/year.
Bogdanov Mikhail B.
Taranova O. G.
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