Astrophysical Bulletin

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Search for possible connections between isolated radio pulsars and supernova remnants
Astrophysical Bulletin - Tập 67 - Trang 160-176 - 2012
E. G. Chmyreva, G. M. Beskin, A. V. Biryukov
We have developed a method of searching for the connections between the isolated radio pulsars and supernova remnants, based on the analysis of their kinematic characteristics. We investigate fairly young (τ ch ≲ 106 yr) radio pulsars with known proper motions and estimated distances (dispersion measures), and supernova remnants located no more than 1–2 kpc away from them. Using a ...... hiện toàn bộ
Speckle interferometry of nearby multiple stars. V. 2002–2006 positional measurements
Astrophysical Bulletin - Tập 68 - Trang 53-56 - 2013
I. I. Balega, Yu. Yu. Balega, L. T. Gasanova, V. V. Dyachenko, A. F. Maksimov, E. V. Malogolovets, D. A. Rastegaev, Z. U. Shkhagosheva
We present the measurements of positional parameters of 194 nearby binary stars performed at the 6-m BTA telescope of the SAO RAS from 2002 through 2006 applying the speckle interferometric technique. The observations were conducted at central filter wavelengths ranging from 545 to 800 nm using a speckle interferometer equipped with a fast CCD and a three-stage image intensifier. A significant par...... hiện toàn bộ
Studies of Features of Evolution of Highly Magnetized Stars—White Dwarfs. I. Observations
Astrophysical Bulletin - Tập 77 - Trang 301-307 - 2022
V. N. Aitov, G. G. Valyavin, A. F. Valeev, G. Sh. Mitiani, A. S. Moskvitin, E. B. Emelyanov, T. A. Fatkhullin, K. A. Antonyuk, G. A. Galazutdinov, A. R. Zakinyan, S. A. Kunikin
We present the results of observations within the program for the search for new highly magnetized white dwarfs among evolutionary old stars of this class. The program was carried out for two years at the 1-m telescope of the SAO RAS. As a result, new white dwarf candidates of different ages with super-strong (several megagauss, tens, hundreds of megagauss) magnetic fields were discovered. These o...... hiện toàn bộ
Polarimetric and spectroscopic observations of a dynamically new comet C/2012 J1 (Catalina)
Astrophysical Bulletin - Tập 70 Số 3 - Trang 349-354 - 2015
Oleksandra Ivanova, Olena Shubina, А. В. Моисеев, V. L. Afanasiev
Pulsations of the B[e]-type component in the CI camelopardalis system
Astrophysical Bulletin - Tập 64 - Trang 50-61 - 2009
V. P. Goranskij, E. A. Barsukova
CI Cam is a well-known B[e]-type star and an X-ray transient, which underwent a powerful outburst in all parts of electromagnetic spectrum in 1998. An extensive V-band photometric monitoring revealed that rapid variability of CI Cam on the time scale of several hours is due to the pulsations of the B4 III–V type component. High-precision CCD photometry of the star was performed with the 50-cm Maks...... hiện toàn bộ
KIC7739728—A New FK Com-Type Star Candidate
Astrophysical Bulletin - - 2019
И. С. Саванов
An analytic algorithm to calculate the inclination, ascending node, and semimajor axis of spectroscopic binary orbits using a single speckle measurement and the parallax
Astrophysical Bulletin - Tập 69 - Trang 461-471 - 2014
J. A. Docobo, P. P. Campo, M. Andrade, E. P. Horch
It is well known that in spectroscopic binary orbits, the inclination, the ascending node, and the semimajor axis remain undetermined, therefore the principal objective of this research is to establish an analytic methodology for the calculation of these parameters for spectroscopic binaries, both single-lined (SB1) and double-lined (SB2). In other words, the goal is to determine their “three-dime...... hiện toàn bộ
Understanding the WMAP Cold Spot mystery
Astrophysical Bulletin - Tập 65 - Trang 101-120 - 2010
P. D. Naselsky, P. R. Christensen, P. Coles, O. V. Verkhodanov, D. I. Novikov, Ja. Kim
The Cold Spot (CS) at galactic coordinates (b = −57°, l = 209°) was discovered in the Wilkinson Microwave Anisotropy Probe (WMAP)data as a cosmic background anomaly. In order to assess the cosmological significance of the Spot, we examine its properties using the cluster analysis of the local extrema in the cosmic microwave background (CMB) signal. We also check the hypothesis that the CMB signal ...... hiện toàn bộ
Scattering of Sunlight by Ion Cloud Under the Condition of Pulsating Mass Dynamics
Astrophysical Bulletin - Tập 74 - Trang 196-202 - 2019
N. I. Kosarev
Absorption and scattering of sunlight in a calcium plasma cloud at λ0 = 397 nm under the conditions of pulsating mass dynamics is analyzed. The problem is described by a set of integrodifferential equations and is solved numerically for the case of 3D spherical geometry of emitting plasma and harmonic variation of the expansion velocity of the plasma sphere. The causes of the frequency asymmetry o...... hiện toàn bộ
FIGGS 2: An HI survey of extremely faint irregular galaxies
Astrophysical Bulletin - Tập 71 - Trang 408-421 - 2016
N. N. Patra, J. N. Chengalur, I. D. Karachentsev, M. E. Sharina
We present observations and first results from the FIGGS2 survey. FIGGS2 is an extension of the earlier Faint Irregular Galaxies GMRT survey (FIGGS) towards faint luminosity end. The sample consists of 20 galaxies, 15 of which were detected in HI 21 cm line using the Giant Meterwave Radio Telescope (GMRT). The median blue band magnitude of our sample is approximately −11.m 6, which is more than on...... hiện toàn bộ
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