Abstract
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 0.2m. 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 ⊙/year.
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References
A. A. Wachmann, Astron. Abhandl. Hamburger Sternw. 6, 3 (1961).
K. M. Volk and S. Kwok, Astrophys. J. 342, 345 (1989).
B. J. Hrivnak, S. Kwok, and K. M. Volk, Astrophys. J. 346, 265 (1989).
S. Kwok, Ann. Rev. Astron. Astrophys. 31, 63 (1993).
T. Blocker, Astron. Astrophys. 299, 755 (1995).
V. P. Arkhipova, N. P. Ikonnikova, R. I. Noskova, and S. Yu. Shugarov, Pis’ma Astron. Zh. 18, 436 (1992) [Sov. Astron. Lett. 18, 175 (1992)].
V. P. Arkhipova, V. F. Esipov, N. P. Ikonnikova, et al., Pis’ma Astron. Zh. 23, 794 (1997) [Astron. Lett. 23, 690 (1997)].
V. P. Arkhipova, N. P. Ikonnikova, R. I. Noskova, and G. V. Sokol, Pis’ma Astron. Zh. 26, 705 (2000) [Astron. Lett. 26, 609 (2000)].
V. G. Klochkova, T. V. Mishenina, and V. E. Panchuk, Pis’ma Astron. Zh. 26, 465 (2000) [Astron. Lett. 26, 398 (2000)].
S. R. Trammell, H. L. Dinerstein, and R.W. Goodrich, Astron. J. 108, 984 (1994).
M. Parthasarathy, S. K. Jain, and G. Sarkar, Astron. J. 129, 2451 (2005).
B. Vandenbussche, D. Beintema, T. de Graauw, et al., Astron. Astrophys. 390, 1033 (2002).
H. L. Johnson, R. I. Mitchel, B. Iriarte, and W. Z. Wisniewski, Comm. Lunar Planet. Lab. 4, 99 (1965).
P. Lenz and M. Breger, Commun. Asteroseismol. 146, 53 (2005).
M. Sperl, Commun. Asteroseismol. 111, 1 (1998).
J. Koornneef, Astron. Asrophys. 128, 84 (1983).
K. U. Allen, Astrophysical Quantities (Springer, New York, 2000; Mir, Moscow, 1977).
M. P. Egan, S. D. Price, K. E. Kraemer, et al., Air Force Research Lab. Techn. Rep. AFRL-VS-TR-2003-1589 (2003).
V. Ossenkopf, T. Henning, and J. S. Mathis, Astron. Asrophys. 261, 567 (1992).
J. S. Mathis, W. Rumpl, and K. H. Nordsieck, Astrophys. J. 17, 25 (1977).
Z. Ivezic and M. Elitzur, Mon. Not. R. Astron. Soc. 287, 799 (1997).
Z. Ivezic and M. Elitzur, Mon. Not. R. Astron. Soc. 303, 864 (1999).
Z. Ivezic and M. Elitzur, Astrophys. J. 445, 415 (1995).
M. Meixner, T. Ueta, A. Dayal, et al., Astrophys. J. Suppl. Ser. 122, 221 (1999).
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Original Russian Text © M.B. Bogdanov, O.G. Taranova, 2009, published in Astronomicheskiĭ Zhurnal, 2009, Vol. 86, No. 9, pp. 914–921.
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Bogdanov, M.B., Taranova, O.G. Results of infrared photometry and a model for the dust envelope of the protoplanetary nebula candidate V1027 Cyg. Astron. Rep. 53, 850–856 (2009). https://doi.org/10.1134/S1063772909090078
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DOI: https://doi.org/10.1134/S1063772909090078