An analysis of spectra of the well known Herbig Ae/Be star AB Aur obtained with a high resolution Coude spectrograph (R~20000-25000) installed on the 2.6-m Shejn telescope at the Crimean Astrophysical Observatory (Ukraine) and a medium resolution echelle spectrometer (R~14000) on the 2-m Zeiss telescope at the Shemakha Astrophysical Observatory of the National Academy of Sciences of Azerbaijan yielded an unexpected result. It turns out the the variations in the equivalent widths EW of the HeI 5876 and D NaI emission lines have an inverse correlation (r=-0.67±0.14 and -0.73±0.10 according to the data from the CrAO and the ShAO, respectively), while the correlation is direct for the Hα and HeI 5876 lines (r=+0.68±0.14 and +0.59±0.14 according to the data from the CrAO and the ShAO, respectively). The Lafler-Kinman method gives a period P=123.7 days for the variation in the EW of these lines. On phase diagrams plotted for this period, the variations in the EW are sinusoidal, with the variations in EW(HeI) and EW(DNaI) in counterphase, while EW(HeI) and EW(Hα) are in phase. A possible interpretation of this phenomenon is examined. The need for new spectral observations of AB Aur in order to confirm the observed effects on a larger statistical sample is emphasized.
Similar content being viewed by others
References
G. H. Herbig, Astrophys. J. Suppl. Ser. 4, 337 (1960).
U. Finkenzeller and R. Mundt, Astron. Astrophys. Suppl. Ser. 55, 109 (1984).
G. V. Zaitseva, Peremennye zvezdy 17, 294 (1970).
N. L. Magalashvili and Ya. I. Kumsishvili, Byulleten’ Abastum. Obs. 39, 3 (1970).
R. Racine, Astron. J. 73, 233 (1968).
P. W. Merrill and C. J. Burwell, Astrophys. J. 77, 103 (1933).
P. W. Merrill and C. J. Burwell, Astrophys. J. 98, 153 (1943).
S. Kleinman and L. V. Kuhi, Publ. Astron. Soc. Pacif. 84, 766 (1972).
T. Böhm and C. Catala, Astron. Astrophys. 301, 155 (1995).
J. A. Eisner, B. F. Lane, L. A. Hillenbrand, et al., Astrophys. J. 613, 1049 (2004).
V. Pietu, S. Guilloteau, and A. Dutrey, Astron. Astrophys. 443, 945 (2005).
J. Hashimoto, M. Tamura, T. Muto, et al., Astrophys. J. 729, L17 (2011).
V. Mannings and A. I. Sargent, Astrophys. J. 490, 792 (1997).
C. A. Grady, B. E. Woodgate, C. W. Bowers, et al., Astrophys. J. 630, 958 (2005).
W. M. Liu, P. M. Hinz, W. F. Hoffman, et al., Astrophys. J. 618, L13 (2005).
V. P. Grishin and A. N. Rostopchina, Astron. zh. 73 (192 (1996).
J. Bouvier, S. H. P. Alencar, T. J. Harries, et al., in Protostars and Planets V, Univ. Arizona Press (2007), p. 479.
C. A. Tout and J. E. Pringle, Mon. Notic. Roy. Astron. Soc. 272, 528 (1995).
C. A. Tout and J. E. Pringle, Mon. Notic. Roy. Astron. Soc. 281, 219 (1996).
F. Palla and S. W. Stahler, Astrophys. J. 418, 414 (1993).
J. Muzerolle, P. D’Alessio, N. Calvet, et al., Astrophys. J. 617, 406 (2004).
J. C. Mottram, J. S. Vink, R. D. Oudmaijer, et al., Mon. Notic. Roy. Astron. Soc. 377, 1363 (2007).
C. A. Grady, K. Humagushi, G. Schneider, et al., Astrophys. J. 719, 15656 (2010).
S. Hubrig, M. A. Pogodin, R. V. Yudin, et al., Astron. Astrophys. 463, 1039 (2007).
G. A. Wade, S. Bagnulo, D. Drouin, et al., Mon. Notic. Roy. Astron. Soc. 376, 1145 (2007).
F. Praderie, T. Simon, C. Catala, et al., Astrophys. J. 303, 311 (1986).
C. Catala, P. Felenbok, A. Tabalera, et al., Astrophys. J. 308, 791 (1986).
T. Böhm, C. Catala, B. Carter, et al., Astron. Astrophys. Suppl. Ser. 120, 431 (1996).
C. Catala, J.-F. Donati, T. Böhm, et al., in Cyclical Variability in Stellar Winds, Springer-Verlag (1998), p. 361.
N. G. Beskrovnaya, M. A. Pogodin, I. D. Najdenov, et al., Astron. Astrophys. 298, 585 (1995).
J. Huovelin, M. Poutanen, and I. Tuominen, Helsinki Univ. of Tech. Radio Lab. Report VS166 (1992), p. 18.
Kh. M. Mikailov, V. M. Khalilov, and I. A. Alekberov, Tsirkulyar ShAO, No. 109 (2005).
G. A. Galazutdinov, SAO RAN, Preprint No. 92 (1992).
N. Piskunov, in: Stellar Magnetism, Nauka, St. Petersburg (1992), p. 92.
J. Lafler and T. D. Kinman, Astrophys. J. Suppl. Ser. 114, 216 (1965).
C. Sorelli, V. P. Grinin, A. Natta, et al., Astron. Astrophys. 309, 155 (1996).
M. A. Pogodin, Astrofizika 24, 491 (1986).
A. P. Goodson and R. M. Wingle, Astrophys. J. 524, 159 (1999).
C. R. D’Angelo and H. C. Spruit, Mon. Notic. Roy. Astron. 406, 1208 (2010).
S. H. Lubow and J. E. Pringle, Mon. Notic. Roy. Astron. 402, L6 (2010).
G. Lodato and J. E. Pringle, Mon. Notic. Roy. Astron. 381, 1287 (2007).
Author information
Authors and Affiliations
Corresponding author
Additional information
Translated from Astrofizika, Vol. 55, No. 4, pp. 527-542 (November 2012).
Rights and permissions
About this article
Cite this article
Pogodin, M.A., Kozlova, O.V., Beskrovnaya, N.G. et al. Cyclic phenomena in the circumstellar envelope of the A0e/B9e Herbig star AB Aur. Astrophysics 55, 480–493 (2012). https://doi.org/10.1007/s10511-012-9254-5
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10511-012-9254-5