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Interpretation of the light curve for the young binary (?) system UY Aur

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Abstract

Using visual, photographic, and photoelectric measurements, we have constructed a historical light curve for the young binary system UY Aur on an interval longer than 100 yr. About a quarter of all magnitude estimates have been obtained for the first time from photographic plates of the Sternberg Astronomical Institute and Harvard College Observatory Astronomical Plate Stacks. Analysis of the light curve and the magnitude dependences of the polarization and color has led us to the following conclusions. Cyclic variations in the seasonally mean brightness of the binary’s primary component UY Aur A with a period of ≃16.3 yr occurred from the mid-1920s to the mid-1940s and after 1986. The variations are caused by the change in the rate of disk accretion onto the star attributable to the motion of the hypothetical companion UY Aur C around the primary star in an orbit with a semimajor axis of ≃ 6 AU. From the early 1950s to the mid-1980s, the periodicity of the seasonally mean variations was not noticeable due to nonperiodic eclipses of UY Aur A by gas-dust clouds. Between 1945 and 1974, another gas-dust cloud obscured and still obscures the component UY Aur B, causing its mean optical brightness to drop by several magnitudes. The role of the clouds that caused an almost simultaneous eclipse of the stars, whose separation in projection onto the celestial sphere exceeds 100 AU, is played by the denser and puffed-up regions of their accretion disks. These regions are the result of a dynamical interaction between the binary’s stars and the outer circumbinary accretion disk. The extinction variations with time are attributable to orbital motion of the binary’s stars and azimuthal inhomogeneity of the clump regions in the disks. A number of observational tests are suggested to verify our conclusions.

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References

  1. S. H. P. Alencar and G. Basri, Astrophys. J. 119, 1881 (2000).

    ADS  Google Scholar 

  2. C. W. Allen, Astrophysical Quantities (Athlone Press, London, 1973; Mir,Moscow, 1977).

    Google Scholar 

  3. P. Artymowicz and S. H. Lubow, Astrophys. J. 421, 621 (1994).

    Article  ADS  Google Scholar 

  4. P. Artymowicz and S. H. Lubow, Astrophys. J. 467, L77 (1996).

    Article  ADS  Google Scholar 

  5. P. Bastien, Astron. Astrophys. Suppl. Ser. 48, 153 (1982).

    ADS  Google Scholar 

  6. P. Bastien, Private commun. (2009).

  7. M. R. Bate, G. Lodato, and J. E. Pringle, Mon. Not. R. Astron. Soc. 401, 1505 (2010).

    Article  ADS  Google Scholar 

  8. G. Beristain, S. Edwards, and J. Kwan, Astrophys. J. 499, 828 (1998).

    Article  ADS  Google Scholar 

  9. M. Beyer, Astron. Nachr. 263, 38 (1937).

    ADS  Google Scholar 

  10. R. C. Bless and B. D. Savage, Astrophys. J. 171, 293 (1972).

    Article  ADS  Google Scholar 

  11. A. Brandeker, R. Jayawardhana, and J. Najita, Astron. J. 126, 2009 (2003).

    Article  ADS  Google Scholar 

  12. W. Ceraski, Astron. Nachr. 193, 439 (1913).

    Google Scholar 

  13. L. M. Close, M. Dutrey, F. Roddier, et al., Astrophys. J. 499, 883 (1998).

    Article  ADS  Google Scholar 

  14. M. Cohen and L. V. Kuhi, Astrophys. J. Suppl. Ser. 41, 743 (1979).

    Article  ADS  Google Scholar 

  15. T. V. Demidova, Astrofizika 52, 623 (2009).

    Google Scholar 

  16. G. Duchéne, J.-L. Monin, J. Bouvier, and F. Ménard, Astron. Astrophys. 351, 954 (1999).

    ADS  Google Scholar 

  17. G. Duvert, A. Dutrey, S. Guilloteau, et al., Astron. Astrophys. 332, 867 (1998).

    ADS  Google Scholar 

  18. A. Dutrey, S. Guilloteau, G. Duvert, et al., Astron. Astrophys. 309, 493 (1996).

    ADS  Google Scholar 

  19. J. H. Elias, Astrophys. J. 224, 857 (1978).

    Article  ADS  Google Scholar 

  20. A. M. Ghez, N. Neugebauer, and K. Matthews, Astron. J. 106, 2005 (1993).

    Article  ADS  Google Scholar 

  21. K. N. Grankin, S. Yu. Melnikov, J. Bouvier, et al., Astron. Astrophys. 461, 183 (2007).

    Article  ADS  Google Scholar 

  22. V. P. Grinin, Pis’ma Astron. Zh. 14, 65 (1988) [Sov. Astron. Lett. 14, 27 (1988)].

    ADS  Google Scholar 

  23. P. Hartigan and S. J. Kenyon, Astrophys. J. 583, 334 (2003).

    Article  ADS  Google Scholar 

  24. L. Hartmann and J. R. Stauffer, Astron. J. 97, 873 (1989).

    Article  ADS  Google Scholar 

  25. G. H. Herbig, Astrophys. J. 214, 747 (1977).

    Article  ADS  Google Scholar 

  26. W. Herbst, D. K. Herbst, E. J. Grossman, and D. Weinstein, Astron. J. 108, 1906 (1994).

    Article  ADS  Google Scholar 

  27. T. M. Herbst, C. D. Koresko, and C. Leinert, Astrophys. J. 444, L93 (1995).

    Article  ADS  Google Scholar 

  28. T. Hioki, Y. Itoh, Y. Oasa, et al., Astron. J. 134, 880 (2007).

    Article  ADS  Google Scholar 

  29. E. L. N. Jensen, S. Dhital, K. G. Stassun, et al., Astrophys. J. 134, 241 (2007).

    Google Scholar 

  30. B. F. Jones and G. H. Herbig, Astron. J. 84, 1872 (1979).

    Article  ADS  Google Scholar 

  31. A. H. Joy, Astrophys. J. 102, 168 (1945).

    Article  ADS  Google Scholar 

  32. A. H. Joy and G. van Biesbroeck, Publ. Astron. Soc. Pasif. 56, 123 (1944).

    Article  ADS  Google Scholar 

  33. V. I. Kardapolov and T. K. Filip’ev, Perem. Zvezdy 22, 103 (1985).

    ADS  Google Scholar 

  34. S. J. Kenyon and L. Hartmann, Astrophys. J. Suppl. Ser. 101, 117 (1995).

    Article  ADS  Google Scholar 

  35. L. V. Kuhi, Astron. Astrophys. Suppl. Ser. 15, 47 (1974).

    ADS  Google Scholar 

  36. C. Leinert, H. Weitzel, M. Haas, et al., ASP Conf. Ser. 32, 21 (1992).

    ADS  Google Scholar 

  37. F. Menard and P. Bastien, IAU Symp. 122, 133 (1987).

    ADS  Google Scholar 

  38. D. C. Nguyen, R. Jayawardhana, M.H. van Kerkwijk, et al., Astrophys. J. 695, 1648 (2009).

    Article  ADS  Google Scholar 

  39. Y. Ochi, K. Sugimoto, and T. Hanawa, Astrophys. J. 623, 922 (2005).

    Article  ADS  Google Scholar 

  40. P. P. Parenago, Perem. Zezdy 4, 145 (1933).

    Google Scholar 

  41. D. E. Potter, L. M. Close, F. O. Roddier, et al., Astrophys. J. 540, 422 (2000).

    Article  ADS  Google Scholar 

  42. A. E. Rydgren, J. T. Schmelz, D. S. Zak, and F. J. Vrba, Publ. US Naval Observ. 25, 5 (1984).

    Google Scholar 

  43. N. N. Samus, L. A. Sat, S. V. Vereshchagin, and A. V. Zharova, in Proc. of the Astro Workshop on Virtual Observatory: Plate Content Digitization, Archive Mining and Image Sequence (Heron, Sofia, Bulgaria, 2006), p. 103.

  44. V. S. Shevchenko, Herbig Ae/Be Stars (FAN, Tashkent, UzSSR, 1989) [in Russian].

    Google Scholar 

  45. D. D. Sokolov, S. N. Nefedov, A. A. Ermash, and S. A. Lamzin, Pis’ma Astron. Zh. 34, 842 (2008) [Astron. Lett. 34, 761 (2008)].

    Google Scholar 

  46. N. Ya. Sotnikova and V. P. Grinin, Pis’ma Astron. Zh. 33, 667 (2007) [Astron. Lett. 33, 594 (2007)].

    Google Scholar 

  47. V. P. Tsesevich and V. A. Dragomiretskaya, RW Aur Stars (Naukova Dumka, Kiev, 1973) [in Russian].

    Google Scholar 

  48. J. W. Warner, R. P. Hubbard, and J. S. Gallagher, Astron. J. 83, 1614 (1978).

    Article  ADS  Google Scholar 

  49. D. Weintraub, PhD thesis (Univ. California, Los Angeles, 1989).

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Correspondence to S. A. Lamzin.

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Original Russian Text © L.N. Berdnikov, A.A. Ermash, S.A. Lamzin, 2010, published in Pis’ma v Astronomicheskiĭ Zhurnal, 2010, Vol. 36, No. 9, pp. 686–697.

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Berdnikov, L.N., Ermash, A.A. & Lamzin, S.A. Interpretation of the light curve for the young binary (?) system UY Aur. Astron. Lett. 36, 653–663 (2010). https://doi.org/10.1134/S1063773710090045

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