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  1. No Access

    Article

    Photometric Activity of CQ Tau over a Time Interval of 125 Years

    The star CQ Tau belongs to the family of UX Ori type stars and is characterized by very complicated photometric behavior and a complex structure of its circumstellar environment. Based on published photometric...

    V. P. Grinin, L. V. Tambovtseva, O. Yu. Barsunova, D. N. Shakhovskoy in Astrophysics (2023)

  2. No Access

    Article

    Rapid quasi-periodic oscillations in the relativistic jet of BL Lacertae

    Blazars are active galactic nuclei (AGN) with relativistic jets whose non-thermal radiation is extremely variable on various timescales1–3. This variability seems mostly random, although some quasi-periodic oscil...

    S. G. Jorstad, A. P. Marscher, C. M. Raiteri, M. Villata, Z. R. Weaver, H. Zhang… in Nature (2022)

  3. No Access

    Article

    Polarimetry of the Nova V339 Del

    Polarimetric UBVRI observations of the Nova V339 Del during the 5-108 days following the maximum of the outburst of 2013 reveal a variability in the degree of linear polarization with an amplitude of about 0.2...

    D. N. Shakhovskoy, K. A. Antonyuk, S. P. Belan in Astrophysics (2017)

  4. No Access

    Article

    Low-mass protoplanetary disk of the herbig Ae star DDser: Thermal radiation of dust and possible presence of massive planets

    We detected thermal IR radiation from DDSer, a low-activity UXOri-type star, the source of which is a disk with a complex structure (an inner ring with the dust temperature of about 900 K and an outer disk wit...

    K. A. Antonyuk, D. N. Shakhovskoy, S. P. Belan, A. N. Rostopchina in Astrophysical Bulletin (2015)

  5. Article

    Open Access

    Linear and circular polarization of comet C/2009 P1 (Garradd)

    We report measurements of linear and circular polarization for the recent comet C/2009 P1 (Garradd) during its approach to the Earth in 2011–2012. Aperture photoelectric observations were carried out on July 2...

    N. N. Kiselev, V. K. Rosenbush, V. L. Afanasiev… in Earth, Planets and Space (2013)

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  6. No Access

    Article

    Comet C/2002 T7 (LINEAR): Polarimetric and photometric studies

    We present the results of polarimetric and photometric observations of dynamically new comet C/2002 T7 (LINEAR) at phase angles from 6° to 26°. During the observations, the comet was at a distance of 2.7–1.3 A...

    V. K. Rosenbush, F. P. Velichko, N. N. Kiselev, S. F. Velichko… in Solar System Research (2006)