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  1. No Access

    Article

    Magnetic Field and Chemical Abundance of AX CVn (HD 110066)

    Abstract—Within the program for studying the variability of slow-rotating magnetic stars, we carried out magnetic monitoring of the Ap star HD 110066 (AX CVn), the expected variability period of which was estimat...

    V. D. Bychkov, L. V. Bychkova, J. Madej, G. G. Valyavin… in Astrophysical Bulletin (2021)

  2. No Access

    Article

    Exoplanet Studies. Photometric Analysis of the Transmission Spectra of Selected Exoplanets

    We present the results of ground based observations and model analysis of transits of exoplanets WASP-33b, WASP-43b, WASP-104b, and HD 219134b. Broadband transmission spectra (dependence of the observed radii ...

    G. G. Valyavin, D. R. Gadelshin, A. F. Valeev, T. E. Burlakova… in Astrophysical Bulletin (2018)

  3. No Access

    Article

    Search for and study of photometric variability in magnetic white dwarfs

    We report the results of photometric observations of a number of magnetic white dwarfs in order to search for photometric variability in these stars. These V-band observations revealed significant variability in ...

    A. F. Valeev, K. A. Antonyuk, N. V. Pit, A. S. Moskvitin… in Astrophysical Bulletin (2017)

  4. No Access

    Article

    Spectroscopic observations of the exoplanet WASP-32b transit

    We present first results of spectroscopic observations of transiting exoplanets in the Special Astrophysical Observatory of the Russian Academy of Sciences with the Main Stellar Spectrograph of the 6-m BTA tel...

    A. O. Grauzhanina, G. G. Valyavin, D. R. Gadelshin… in Astrophysical Bulletin (2017)

  5. No Access

    Article

    Search for signatures of reflected light from the exoplanet HD 189733b by the method of residual dynamical spectra

    The goal of the present study is the development and testing of a method for spectral detection of the light of host stars reflected from their exoplanets. The presented method is based on the analysis of dyna...

    G. G. Valyavin, A. O. Grauzhanina, G. A. Galazutdinov… in Astrophysical Bulletin (2015)

  6. No Access

    Article

    Detection of regular low-amplitude photometric variability of the magnetic dwarf WD0009+501. on the possibility of photometric investigation of exoplanets on the basis of 1-meter class telescopes of the special and crimean astrophysical observatories

    We present the results of photometric observations of the weak magnetic white dwarf WD 0009+501. The observations were carried out for two years with the 1-m telescopes of the Special and Crimean Astrophysical...

    A. F. Valeev, K. A. Antonyuk, N. V. Pit, V. Ya. Solovyev… in Astrophysical Bulletin (2015)

  7. No Access

    Article

    First detection of exoplanet transits with the SAO RAS 1-m telescope

    We present the results of observations of single exoplanet transits conducted with the SAO RAS 1-m telescope. We studied two exoplanets with different eclipse depths: WASP-43b and WASP-104b. Both transits were...

    G. G. Valyavin, A. F. Valeev, D. R. Gadelshin, A. S. Moskvitin… in Astrophysical Bulletin (2015)