Zobrazeno 1 - 10
of 22
pro vyhledávání: '"I S Potravnov"'
It has been shown that during the outburst of accretion activity observed in UX Ori type star RZ Psc in 2013, the accretion rate increased approximately by an order of magnitude. This means that the accretion process at the late stages of the Pre-Mai
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::da708119ba003273688ae515ea08c7a4
http://arxiv.org/abs/2301.11693
http://arxiv.org/abs/2301.11693
Autor:
M. V. Eselevich, I. S. Potravnov
Publikováno v:
Astrophysics. 63:482-490
Results from a study of low resolution spectra and kinematics of the star V1117 Her located at a high galactic latitude b = +33°.8 are presented. It is shown that this star has A7 IV photospheric class, luminosity L ≈ 26 Lʘ, and spectral signs of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::245bf98d886f17ed234e25c96e6bf924
https://doi.org/10.1007/s10511-020-09652-1
https://doi.org/10.1007/s10511-020-09652-1
Publikováno v:
Astronomy Letters. 44:798-802
We present the results of our photometric (V RI) and spectroscopic observations of the young variable star V730 Cep (MisV1147) classified by Uemura et al. (2004) as a Herbig Be star. Our photometry confirms the conclusion of the above authors that th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d0ec3b4a5a8a537ea56cf08266f59a21
https://doi.org/10.1134/s1063773718120022
https://doi.org/10.1134/s1063773718120022
Rotation periods inferred from the magnetic variability of some Ap stars are incredibly long, exceeding ten years in some cases. An explanation for such slow rotation is lacking. This paper attempts to provide an explanation of the super-slow rotatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::39a3ac0e140039cc5d5a779c6f1b29df
Autor:
Vasilii V. Gvaramadze, K. Zwintz, M. Müllner, E. W. Guenther, A. Y. Kniazev, Enrico Corsaro, T. Steindl, I. S. Potravnov
Publikováno v:
Astronomy & Astrophysics. 647:A168
Context. In recent years, our understanding of solar-like oscillations from main sequence to red giant stars has improved dramatically thanks to pristine data collected from space telescopes. One of the remaining open questions focuses on the observa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3fd0efc780cf4e1b34e7c57bd336013c
https://doi.org/10.1051/0004-6361/202039578
https://doi.org/10.1051/0004-6361/202039578
Publikováno v:
Astronomy Letters. 42:583-597
The young Herbig Ae star MWC 480 (HD 31648) is one of the comprehensively spectroscopically studied stars in the ultraviolet, optical, and infrared spectral ranges. Using non-LTE modeling of its hydrogen spectrum, we have calculated the contribution
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3d505b07a334f67b9b1e812e8a1c468e
https://doi.org/10.1134/s1063773716080065
https://doi.org/10.1134/s1063773716080065
Publikováno v:
Astronomy Letters. 41:407-416
The origin of the blueshifted narrow absorption components in the resonance sodium doublet lines observed in the spectra of some young stars is discussed. Such components are assumed to be formed by the interaction of the circumstellar gas with the s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c52603d68aec54e20107f177ad9ff05f
https://doi.org/10.1134/s1063773715070014
https://doi.org/10.1134/s1063773715070014
Publikováno v:
Astrophysics. 57:491-499
The behavior of the radial velocity of the UX Ori type star RZ Psc is studied. The existence of an inner cavity with a radius of about 0.7 a.u. in the circumstellar disk of this star allows to suggest the presence of a companion. A study of the radia
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ee219f7cacbddb8081d09e837a8f1013
https://doi.org/10.1007/s10511-014-9352-7
https://doi.org/10.1007/s10511-014-9352-7
Autor:
R. Leadbeater, M. Appakutty, C. Muthumariappan, K. Jayakumar, I. S. Potravnov, M. Parthasarathy
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 445:2884-2899
We report high-resolution (R = 30 000, 45 000 and 75 000) echelle and medium-resolution (R = 22 000 and 10 000) spectroscopic observations of the long-period, eclipsing binary ǫ Aurigae during the 2009 - 2011 eclipse. Low-excitation shell lines, viz
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bad2fc6b9a8f6969f0925529d33892c3
https://doi.org/10.1093/mnras/stu1844
https://doi.org/10.1093/mnras/stu1844
Publikováno v:
Astronomy & Astrophysics. 630:A64
We discuss a revision of accretion activity and kinematics of the enigmatic isolated UX Ori type star RZ Psc. Previously, RZ Psc was known to possess only spectroscopic signatures of outflow in the low-excitation lines of alkali metals. The archival
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aff291ed0ed35a45f9a598c1599c6f07
https://doi.org/10.1051/0004-6361/201935492
https://doi.org/10.1051/0004-6361/201935492