Abstract
Observations of the chemically peculiar star HD 27404 with the 6-m SAO RAS telescope showed a strong magnetic field with the longitudinal field component varying in a complicated way in the range of −2.5 to 1 kG. Fundamental parameters of the star (Teff = 11 300 K, log g = 3.9) were estimated analyzing photometric indices in the Geneva and in the Stro¨ mgren–Crawford photometric systems. We detected weak radial velocity variations which can be due to the presence of a close star companion or chemical spots in the photosphere. Rapid estimation of the key chemical element abundance allows us to refer HD 27404 to a SiCr or Si+ chemically peculiar A0–B9 star.
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References
G. W. Preston, Annual Rev. Astron. Astrophys. 12, 257 (1974).
P. Renson and J. Manfroid, Astron. and Astrophys. 498, 961 (2009).
D. O. Kudryavtsev, I. I. Romanyuk, V. G. Elkin, and E. Paunzen, Monthly Notices Royal Astron. Soc. 372, 1804 (2006).
I. I. Romanyuk, D. O. Kudryavtsev, E. A. Semenko, and A. V. Moiseeva, Astrophysical Bulletin 71, 447 (2016).
P. North and N. Cramer, Astron. and Astrophys. Suppl. 58, 387 (1984).
D. O. Kudryavtsev (private communication).
I. McDonald, A. A. Zijlstra, and M. L. Boyer, Monthly Notices Royal Astron. Soc. 427, 343 (2012).
D. O. Kudryavtsev, I. I. Romanyuk, E. A. Semenko, and G. A. Solov’ev, Astrophysical Bulletin 62, 147 (2007).
P. Renson and F. A. Catalano, Astron. and Astrophys. 378, 113 (2001).
K. T. Wraight, L. Fossati, M. Netopil, et al., Monthly Notices Royal Astron. Soc. 420, 757 (2012).
S. Grenier, M.-O. Baylac, L. Rolland, et al., Astron. and Astrophys. Suppl. 137, 451 (1999).
Y. Y. Balega, V. V. Dyachenko, A. F. Maksimov, et al., Astrophysical Bulletin 67, 44 (2012).
V. E. Panchuk, G. A. Chuntonov, and I. D. Naidenov, Astrophysical Bulletin 69, 339 (2014).
G. A. Chountonov, in Proc. Intern. Conf. on Magnetic Stars, Nizhnij Arkhyz, Russia, 2003, Ed. by Y. V. Glagolevskij, D. O. Kudryavtsev, and I. I. Romanyuk (Nizhnij Arkhyz, 2004), pp. 286–291.
I. I. Romanyuk, D. O. Kudryavtsev, E. A. Semenko, and I. A. Yakunin, Astrophysical Bulletin 70, 456 (2015).
S. J. Murphy and E. Paunzen, Monthly Notices Royal Astron. Soc. 466, 546 (2017).
M. Netopil, E. Paunzen, H. M. Maitzen, et al., Astron. and Astrophys. 491, 545 (2008).
S. J. Kenyon, D. Dobrzycka, and L. Hartmann, Astron. J. 108, 1872 (1994).
U. Munari and T. Zwitter, Astron. and Astrophys. 318, 269 (1997).
P. B. Lucke, Astron. and Astrophys. 64, 367 (1978).
M. Kunzli, P. North, R. L. Kurucz, and B. Nicolet, Astron. and Astrophys. Suppl. 122, 51 (1997).
R. Napiwotzki, D. Schoenberner, and V. Wenske, Astron. and Astrophys. 268, 653 (1993).
O. P. Kochukhov, in Proc. Intern. Conf. on Physics of Magnetic Stars, Nizhnij Arkhyz, Russia, 2006, Ed. by D. O. Kudryavtsev and I. I. Romanyuk (Nizhnij Arkhyz, 2007), pp. 61–80.
R. Kurucz, CD-ROMs (Smithsonian Astrophysical Observatory, Cambridge, MA, 1994).
T. Ryabchikova, N. Piskunov, R. L. Kurucz, et al., Physica Scripta, No. 90, 054005 (2015).
J.-F. Donati, M. Semel, B. D. Carter, et al., Monthly Notices Royal Astron. Soc. 291, 658 (1997).
O. Kochukhov, V. Makaganiuk, and N. Piskunov, Astron. and Astrophys. 524, A5 (2010).
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Original Russian Text © E.A. Semenko, I.I. Romanyuk, E.S. Semenova, A.V. Moiseeva, D.O. Kudryavtsev, I.A. Yakunin, 2017, published in Astrofizicheskii Byulleten’, 2017, Vol. 72, No. 4, pp. 422–428.
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Semenko, E.A., Romanyuk, I.I., Semenova, E.S. et al. Magnetic stars with wide depressions in the continuum. 2. The silicon star with a complex field structure HD 27404. Astrophys. Bull. 72, 384–390 (2017). https://doi.org/10.1134/S1990341317040034
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DOI: https://doi.org/10.1134/S1990341317040034