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21. CH Cyg
... The hot component shows very spectacular activity: irregular outbursts accompanied by fast, massive outflows and jets. ... Diffraction-limited images for both components of CH Cyg binary system were reconstructed using visible speckle interferometry at BTA 6-m telescope (Fig.1). The orbital period 15.6 years and masses: 2.0 Msun and 0.7 Msun for red giant and white dwarf, respectively were derived from angular distance (0.042") and magnitude difference (2 m ) of the components. ... Fig.1. ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2010/CHCyg/ -- 4.2 Кб -- 02.10.2012
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22. New LBV Star Discovered in the Galaxy
... Luminous blue variable (LBV) stars are the most massive stars with 40-120 solar masses, which are passing the short stage of evolution losing their hydrogen envelopes before exploding as Supernovae. These are extremely rare objects, only about a dozen of the most massive LBVs are known in the Galaxy. ... In the spectral observations of stars with infrared circular nebulae, found in the Spitzer survey (24 microns), a new LBV star in the Galaxy was discovered. It was named MN112. ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2010/LBV-3/ -- 4.4 Кб -- 02.10.2012
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23. X-rays binary Cyg X-3
... The close X-ray binary with relativisic jest, contained probably a black hole, Cygnus X-3 has been detected in first time in Gamma-rays at enegries higher 100 МeV (AGILE, Tavani et al., ... Koljonen K.I.I.; Hannikainen D.C.; McCollough M.L.; Pooley G.G.; Trushkin S.A. The hardness-intensity diagram of Cygnus X-3: revisiting the radio/X-ray states 2010, MNRAS, 406, 307-319. ... X-ray image of Cygnus X-3 (Chandra) . ... Light curves Cygnus X-3 in gamma-rays (AGILE) and in radio cm-bands (Ryle tel., ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2010/LBV-X3/ -- 4.8 Кб -- 02.10.2012
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24. NGC 4460
... An analysis on new observational data taken with the MPFS and SCORPIO spectrographs indicates that we are dealing with the "galactic wind": the gas is blown above the galactic plane with the characteristic velocity of about 130km/s. The gas outflow is caused by a combined action of winds from the supernovae and young massive stars located in the galaxy's circumnuclear region. ... The most probable hypothesis is that the accretion of intergalactic gas clouds is feeding their star formation. ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2010/NGC4460/ -- 4.5 Кб -- 02.10.2012
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25. Seyfert galaxies
... By means of deep optical images obtained at the Special Astrophysical Observatory 6-m telescope it was discovered that some Seyfert galaxies that were earlier considered to be non-interacting objects displayed signatures of elongated tidal envelopes belonging to satellite debris. ... Our results suggest that statistic studies based on popular imaging surveys (for example SDSS) can lead to an underestimation of the fraction of minor mergers among galaxies with active nuclei (AGN). ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2010/SeyfertGal/ -- 3.6 Кб -- 02.10.2012
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26. Speckle interferometry of magnetic stars
... According to the current estimates, a few percent of Main Sequence B5-F5 stars reveal strong surface magnetic fields reaching the values of tens of kilogauss, which is an order of magnitude greater than the maximal magnetic field in sunspots. ... An important direction in the study of magnetic stars is the study of binary and multiple systems with magnetic components using the techniques of spectroscopy and high angular resolution interferometry. ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2010/Speckle/ -- 4.6 Кб -- 02.10.2012
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27. Detection of radio pulsar pairs
... According to modern views on the evolution and origin of stars, most of the stars are members of binary systems. ... After the second explosion, the pairs tend to break up and neutron stars and/or black holes fly apart. High velocities of radio pulsars are apparently largely due to this effect. ... For all possible pairs the probability of trajectory approach at small distances for the epoch, corresponding to the age of the younger pulsar have been evaluated. ... Pulsars J0543+2329 and J0528+2200. ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2011/Beskin/ -- 4.7 Кб -- 02.10.2012
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28. Detection of polarized radiation sources with unusual spectral characteristics
... Solar flare activity is produced by the processes of accumulation and release of energy in an active region. ... In the framework of study of solar active regions, producing powerful flares the researchers from the RATAN-600 radio telescope have detected sources with features in the form of a sharp drop in the intensity of polarized radiation in various parts of the recorded frequency range (2-16GHz), sometimes changing the sign of polarization. ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2011/Bogod/ -- 4.0 Кб -- 02.10.2012
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29. The study of star formation in KDG61 and KDG64
... The history of star formation was successfully analyzed for the first time based on the spectra of the stellar population of dwarf galaxies of low surface brightness outside the Local Group. We have investigated the stellar population of two dwarf spheroidal galaxies KDG61 and KDG64 in the central part of a close group of galaxies M81. ... These galaxies are dominated by the old stellar population (12-14 billion years) of low metallicity ([Fe/H] ~ -1.5). ... KDG61 . ... KDG64 ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2011/Makarovy/ -- 3.6 Кб -- 02.10.2012
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30. Study of radio spectra and variability of GPS sources
... The results of long-term monitoring of Gigahertz-Peaked Spectrum sources were found the statistically significant differences (0.05 significance level) in the high-frequency spectral index distribution between subgroups of galaxies and quasars. ... This can mean that the electron energy distribution for GPS galaxies is steeper than for GPS quasars. ... The first area corresponds to GPS-quasars that have statistically larger value of redfhift, second area corresponds to GPS-galaxies. ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2011/Mingaliev/ -- 4.9 Кб -- 02.10.2012
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31. New Polar Ring Galaxies
... Galaxies with polar rings (PRGs) are a unique class of extragalactic objects, consisting of a ring or disk of gas, stars and dust orbiting in a plane nearly perpendicular to the disk of a central galaxy. ... At present, there are only about two dozen kinematically confirmed galaxies in this PRG class, mostly from the Whitmore et al. (1990) catalogue, based on photographic images. ... Examples of object from our catalogue SPRC (=SDSS-based Polar Ring Catalogue). ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2011/Moiseev/ -- 5.2 Кб -- 02.10.2012
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32. New data on the cpmplex field structure of chemically peculiar stars
... As a result of BTA observations of 23 chemically peculiar stars with strong magnetic fields, it was found that in 22 of them the longitudinal magnetic field, measured from the hydrogen line cores are considerably lower (by about 1/3) than the value measured from metal lines in the same spectra. ... New approaches need to be developed in order to interpret the data. ... The Zeeman spectrum of a star with a strong magnetic field, 53 Cam. ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2011/Roman/ -- 5.4 Кб -- 02.10.2012
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33. The dust jets in the nucleus of comet 29P/Schwassmann-Wachmann 1
... An estimate the rotation period of cometary nuclei is important for understanding and describing the physical processes of the cometary activity. Unfortunately, the measurements of the rotation periods of the comet nucleus depend on the model assumptions and it is one of the main reasons for the scatter of the estimates given in various articles for a given comet. ... Right: the image of the comet 29P/Schwassmann-Wachmann 1 obtained at the 6-m telescope. ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2012/Ivanova/ -- 5.4 Кб -- 03.02.2013
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34. A unique isolated dwarf spheroidal galaxy KKR25
... We present a photometric and spectroscopic study of the unique isolated nearby galaxy KKR25. The isolated dwarf spheroidal (dSph) galaxy KKR25 was discovered by Karachentseva, Karachentsev Richter (1999, A , 135, 221) during the search of dwarf galaxies in the direction of the Local Void. In spite of its isolation KKR 25 has no gas and looks like a normal dwarf spheroidal system. ... This is the first known planetary nebula in a dwarf spheroidal galaxy outside the Local Group. ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2012/Makarov/ -- 5.8 Кб -- 02.10.2012
[ Сохраненная копия ] Ссылки http://www.sao.ru/Doc-en/SciNews/2012/Makarov/index.html -- 5.8 Кб -- 02.10.2012
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[ Сохраненная копия ] Ссылки http://www.sao.ru/Doc-en/SciNews/2012/Makarov/index.html -- 5.8 Кб -- 02.10.2012
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35. Modeling of Very Luminous Stars in the M33
... We find a transition of LBV star from the LBV instability strip to the region of classical WN for the first time. ... Numerical modeling of the atmospheres of these objects are very important for understanding the evolutionary relationship WR and LBV stars, as well as of the physical causes of LBVs variability. We studied spectra of two very luminous stars in the M33 galaxy - LBV V532 and late WN star FSZ35. ... Bottom: The spectrum of FSZ35 with the final model . ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2012/Maryeva/ -- 5.9 Кб -- 02.10.2012
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36. Origin of the internal structures in HL Tauri jet (HH 151)
... The HH flow associated with young stellar object HL Tau has an exciting history and even until now the origin of some its features is not clear yet. ... Knotty structures of Herbig-Haro jets are common phenomena and knowing the origin of such structures is essential for understanding the processes of jet formation. ... In the flow detected compact knots with high (-150 km/s) and bow shape structures in front of those, with low radial velocities (-50 km/s). ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2012/Movses/ -- 5.1 Кб -- 02.10.2012
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37. ULXs
... Ultraluminous X-ray sources (ULXs) are located in external galaxies, their X-ray luminosities (10 39 - 10 41 erg/s) are thousand times greater than those of brightest black holes in the Galaxy. ULXs may be supercritical accretion disks around black holes of stellar masses (~10 Solar masses) like that in SS433, or they may be a hypothetical intermediate-mass black holes (hundreds - thousands Solar masses) with standard accretion disks. ... 2) The ULX progenitors were ejected from the star clusters. ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2012/ULXs/ -- 5.5 Кб -- 03.02.2013
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38. Multiple System iUMA
... Recent studies indicate that stars are most likely forming within the binary and multiple systems. ... During several years we are conducting the observations of such multiple stellar systems at the BTA telescope in order to find their companions and study the properties therein. ... This star is interesting in that it may be a dynamically unstable multiple star, meaning that over time, such systems will split into individual stars. ... A bright component is a very tight spectroscopic binary star. ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2012/iUMA/ -- 4.4 Кб -- 03.02.2013
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39. UGC 2172, NGC 3239
... Among the newly observed objects, we discovered the galaxies UGC 2172 and NGC 3239 in the stage of a vigorous burst of star formation. ... A detailed presentation of the results is contained in the papers: Karachentsev et al. 2013, AJ, 145, 101; Karachentsev and Kaisina 2013, AJ, 146, 46; Kaisin and Karachentsev 2013, Astrophysical Bulletin, 68, 381. ... Karachentsev et al. ... An image of the interacting galaxy NGC 3239, which is a double (or a triple) system of merging dwarf galaxies . ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2013/Kaisin/ -- 4.2 Кб -- 28.02.2014
[ Сохраненная копия ] Ссылки http://www.sao.ru/Doc-en/SciNews/2013/Kaisin/index.html -- 4.2 Кб -- 28.02.2014
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[ Сохраненная копия ] Ссылки http://www.sao.ru/Doc-en/SciNews/2013/Kaisin/index.html -- 4.2 Кб -- 28.02.2014
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40. V1494
... The spatially resolved structure near the hydrogen emission H line was found in the spectrum taken with the BTA/SCORPIO in June, 2013. ... The fragment of the Nova V1494 Aql spectrum is shown in Fig.1. ... The Nova V1494 Aql has passed the stage of the supersoft X-ray source (SSS) in the period between 218 and 516 days after the visible light maximum (Schwarz et al., ... The spectrum of Nova V1494 Aql taken on 2013 June 9 with BTA/SCORPIO . ... The vertical lines are the lines of night sky emission....
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Ссылки http://www.sao.ru/Doc-en/SciNews/2013/V1494/ -- 6.7 Кб -- 28.02.2014
[ Сохраненная копия ] Ссылки http://www.sao.ru/Doc-en/SciNews/2013/V1494/index.html -- 6.7 Кб -- 28.02.2014
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[ Сохраненная копия ] Ссылки http://www.sao.ru/Doc-en/SciNews/2013/V1494/index.html -- 6.7 Кб -- 28.02.2014
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