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pro vyhledávání: '"Tsvetkov, D."'
Topology, which originated as a mathematical discipline, nowadays advances the understanding of many branches of science and technology from elementary particle physics and cosmology to condensed matter physics. In optics, the topology of light and d
Externí odkaz:
http://arxiv.org/abs/2401.12306
Autor:
Arkhipova, V. P., Ikonnikova, N. P., Shenavrin, V. I., Burlak, M. A., Tatarnikov, A. M., Tsvetkov, D. Yu., Belinskii, A. A., Pavlyuk, N. N., Shugarov, S. Yu.
We present the results of a new stage of the long-term photometric study of FG Sge which is a quickly evolving central star of the planetary nebula Hen 1-5. Our new observations carried out on the SAI MSU telescopes in the optical ($BVR_CI_C$) and in
Externí odkaz:
http://arxiv.org/abs/2206.02493
Publikováno v:
Peremennye Zvezdy (Variable Stars), V.40, No.1, 2020
CCD BVRI photometry is presented for the type Ic-BL Supernovae 2016coi and 2018ebt. The shape of the light curves for both objects is typical for this class of SNe. A change of brightness decline rate at about 100 days after maximum light is observed
Externí odkaz:
http://arxiv.org/abs/2007.05333
Autor:
Tsvetkov, D. Yu., Baklanov, P. V., Potashov, M. Sh., Oknyansky, V. L., Mikailov, Kh. M., Huseynov, N. A., Alekberov, I. A., Khalilov, O. V., Pavlyuk, N. N., Metlov, V. G., Volkov, I. M., Shugarov, S. Yu.
We present optical photometric observations of SN 2018aoq from 2 to 100 days after explosion, and 7 spectra at epochs from 11 to 71 days. The light curves and spectra are typical for SNe II-P. As previously reported, SN 2018aoq appears to be of inter
Externí odkaz:
http://arxiv.org/abs/1904.06586
It is shown that inhomogeneous broadening of the spectral line of active impurities may sustain simultaneously parity (P) and time (T) symmetries of a medium, in a finite range of field frequencies, what is forbidden by the causality principle in med
Externí odkaz:
http://arxiv.org/abs/1811.07324
Akademický článek
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Akademický článek
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Autor:
Tsvetkov, D. Yu., Shugarov, S. Yu., Volkov, I. M., Pavlyuk, N. N., Vozyakova, O. V., Shatsky, N. I., Nikiforova, A. A., Troitsky, I. S., Troitskaya, Yu. V., Baklanov, P. V.
We present UBVRI photometry of the supernova 2017eaw in NGC 6946, obtained in the period from May 14 until December 7, 2017. We derive dates and magnitudes of maximum light in the UBVRI bands and the parameters of the light curves. We discuss colour
Externí odkaz:
http://arxiv.org/abs/1801.00340
Autor:
Goranskij, V. P., Barsukova, E. A., Valeev, A. F., Tsvetkov, D. Yu., Volkov, I. M., Metlov, V. G., Zharova, A. V.
We present medium-resolution spectroscopy and multicolor photometry for the optical transient PSN J09093496+3307204 (SN 2015bh) in the galaxy NGC 2770, which has transferred into the supernova phase. The observations were carried out between February
Externí odkaz:
http://arxiv.org/abs/1609.00731
We present CCD BVRI photometry for PSN J07285387+3349106 in NGC 2388 collected from 2015 February 17 until March 17. Decaying by 3.6 mag in the R band in the first 20 days post-maximum, this object is among the fastest supernovae observed to date. Th
Externí odkaz:
http://arxiv.org/abs/1504.01864