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41. Measurement of the dark halo shape in polar ring galaxies
... According to the most popular cosmological paradigm, the greater part of the galaxy mass is accumulated in the dark matter halo. ... The polar ring galaxies (PRGs) reveal external rings or disks of gas, dust and stars rotating in a plane roughly perpendicular to the disk of the central galaxy. ... The shape of the dark halo in the model was chosen so as to achieve the best fit to the observed rotation of both galaxies themselves and their polar rings. ... The SPRC-7 galaxy. ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2014/DMhalo/ -- 8.9 Кб -- 10.04.2016
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42. SS433
... SAO researchers have discovered that supercritical accretion disks eject hot gas with a velocity of a few thousand kilometers per second. The supercritical regime of accretion onto black holes is very important for astrophysics. In the first half-billion years just after our Universe was born, supermassive black holes (quasars) began to appear and grow in centers of young galaxies. ... Gas falling onto a black hole (accretion) is not a frequent phenomenon in our Galaxy. ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2014/Fabrika/ -- 4.7 Кб -- 10.04.2016
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43. Figure 1
... The same spectral region is shown in 8 spectra; two bright lines are seen in each: the line of ionized helium on the right, and the line on the left is the Bowen blend, which consists of 6 lines (3 lines of doubly ionized nitrogen and 3 lines of doubly ionized carbon). ... Below the lines, broad contours are shown; these are the discovered super-broad components, one under the helium line, another one under the Bowen blend, and their sum. ... That is why these components are weak. ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2014/Fabrika/Fig1.html -- 2.5 Кб -- 28.02.2014
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44. Figure 2
... There are two stars in the binary system: a donor star on the right and a black hole on the left (an infinitely small point in the center of a complex figure). ... The wind is ejected as a hollow cone; it has a funnel (the funnel opening angle in the figure) and thick walls (wall opening angle in the figure). The observer looks at the whole system and the supercritical disk from the right, and sees everything up to the wind photosphere (the red color in the figure). ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2014/Fabrika/Fig2.html -- 2.6 Кб -- 28.02.2014
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45. Evidences of supercritical accretion onto black hole in SS433
... SS433 is a close binary system, one star is a supergiant, a second one is a black hole. ... Even a black hole cannot accept such an enormous mass flux, a supercritical accretion disk appears, all the excess gas glows up to several tens of thousands degrees and is ejected off the disk with enormous velocities. ... SAO researchers have found an evidence of the supercritical accretion onto a black hole in SS433, which follows from a brightness variability of the SS433 disk. ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2014/Fabrika2/ -- 7.1 Кб -- 10.04.2016
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46. Discovery of enrichment of the envelopes of post-AGB stars with heavy metals
... The effect is strongest in the most evolved, high-latitude supergiant V5112 Sgr=IRAS19500-1709, which has an extended structured envelope (Figs.1 and 2). In the optical spectrum of this object, the BaII ion lines are split into three components (Figs.3 and 4). ... Thus, we discovered for the first time the enrichment of the stellar envelope with heavy metals produced at the AGB stage. ... Detection of heavy-metal lines in the spectrum of the circumstellar envelope of a post-AGB star. ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2014/Klochkova/ -- 5.0 Кб -- 28.02.2014
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47. IRAS01005+7910
... The variability of the spectrum of the optical component of the IR-source IRAS01005+7910 was discovered for the first time in the BTA spectra [1]. ... The spectral features include absorptions that form in near-photospheric layers, narrow envelope emissions, and emission-absorption profiles that form in photosphere-to-envelope transition layers (the wind). ... Discovery of spectral variation in the optical counterpart of IRAS01005+7910. ... Dashed line - envelope curve of all the SiII 5979 profiles ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2014/Klochkova2/ -- 6.1 Кб -- 10.04.2016
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48. Discovery of an isolated dwarf spheroidal galaxy neighboring the Local Group
... Our recent observations with the Hubble Space Telescope (August 29, 2014) led to revealing a highly isolated dwarf spheroidal galaxy KKs 3 situated at a distance of 2.12 0.07 Mpc from the Milky Way. The dSph galaxy locates on the southern sky (RA=02 h 24 m 44.4 s , Dec.= ... Over the last decade, about 30 dSph galaxies have been discovered inside the Local Group through systematic search in the vicinity of M31 and more that a dozen dSphs were discovered in the nearby group around M81. ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2014/Makarov/ -- 5.9 Кб -- 10.04.2016
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49. Mkn6
... Based on the measurements of the Stokes parameters in the continuum and in the broad 0.6563 nm hydrogen emission line obtained with the 6-m telescope for the Seyfert galaxy Mkn 6, secular variability of the hydrogen line profile polarization was discovered; a time lag of less than 2 days between the continuum flux and the polarized continuum emission was determined which corresponds to the size of the region where the polarization of the continuum occurs, less than 0.001 pc. ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2014/Mkn6/ -- 4.3 Кб -- 28.02.2014
[ Сохраненная копия ] Ссылки http://www.sao.ru/Doc-en/SciNews/2014/Mkn6/index.html -- 4.3 Кб -- 28.02.2014
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[ Сохраненная копия ] Ссылки http://www.sao.ru/Doc-en/SciNews/2014/Mkn6/index.html -- 4.3 Кб -- 28.02.2014
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50. Suppression of cooling by strong magnetic fields in white dwarf stars
... Astronomers of the SAO together with an international group of scientists have proposed an explanation to the long-standing mystery of why magnetic fields are more common amongst cool white dwarf stars than amongst young and hotter ones. ... As the result magnetic white dwarfs demonstrate excess in their frequencies in the temperature range below 14000K. The authors also show that the strongly magnetic white dwarfs are of the oldest stars of the Galaxy originated from intermediate-mass relic stars. ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2014/Nature/ -- 3.6 Кб -- 10.04.2016
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51. Comet C/2014 Q2 (Lovejoy) and asteroid 357439 2004 BL86
... In January 2015 using the Mini-MegaTORTORA multichannel optical sky-monitoring system with subsecond temporal resolution, the observations of comet C/2014 Q2 (Lovejoy) and asteroid 357439 2004 BL86 were carried out. ... It was put into operation in 2014. ... Comet C/2014 Q2 (Lovejoy). The 60-min-long observations with the Mini-MegaTORTORA system on Jan 19, 2015 at 16:50 UT, exposure time 30 s, BVR synchronously . ... Asteroid 357439 2004 BL86. ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2015/Beskin/ -- 4.0 Кб -- 10.04.2016
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52. New LBV Stars in the Andromeda Galaxy
... Two new LBV stars have been discovered in the Andromeda Galaxy. ... In Figure 1 the spectral energy distributions for six stars are shown: upper row - the newly discovered LBV stars, middle row - two well-known LBV stars Var A-1 and AE And, the lower row - two new B[e]-supergiant stars in Andromeda. ... Infrared spectra of the stars in the Andromeda Galaxy: two classical LBVs Var A-1 and AE And, two new LBVs J004526.62 and J004051.59, and two new B[e]-supergiants J004417.10 and J004444.52. ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2015/Fabrika/ -- 5.7 Кб -- 10.04.2016
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53. C/2010 S1 (LINEAR), C/2010 R1 (LINEAR)
... Currently, there is very little information on comets which are active beyond the orbit of Jupiter. ... Previous observations conducted by our team with the SAO RAS 6-m telescope showed that some of these comets have extended tails dissimilar to the tails of comets forming at close heliocentric distances. ... We for the first time measured the linear polarization of scattered emission for the two distant comets C/2010 S1 (LINEAR) and C/2010 R1 (LINEAR) at heliocentric distances of 5.9-7.0 au. ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2015/Ivanova/ -- 5.7 Кб -- 10.04.2016
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54. Solar eclipse 2015
... The March 20 total solar eclipse was visible over the North Atlantic and Arctic Oceans. ... Solar eclipses are of interest for radio astronomy, as they make it possible to observe individual details on the solar disc (spots, filaments, flocculi, etc.) ... On March 20, 2015 the integrated observations of the solar eclipse were carried out at the RATAN-600 radio telescope at 70 wavelengths simultaneously in the range of 1.65cm to 10cm with the 1% frequency resolution. ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2015/eclipse2015/ -- 4.4 Кб -- 10.04.2016
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55. Lack of Dwarf Galaxies in the Local Volume Compared to Conventional Cosmology
... The sample of the Local Volume galaxies (distance smaller than 10 Mpc) gives a unique opportunity to study the properties of galaxies including the weakest objects: the absolute magnitude M B -10 and the virial mass M vir 10 9 M x263C;. ... Luminosity function of the Local Volume galaxies. ... The luminosity functions for galaxies are presented: red dashed line - from the 2dFGRS survey (Norberg et al. 2002); blue dash-dotted line - from the SDSS survey (Blanton et al. ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2016/Makarov/ -- 7.5 Кб -- 10.04.2016
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56. HD965
... The chemically peculiar star HD965 belongs to a rare type of very slow rotators. As far back as in the 90s, G.Mathys (ESO, Chile) supposed its extremely slow rotation as observing split Zeeman components in the spectrum, from which he measured the magnetic field on its surface. Field variation proved to be very slow, and G.Mathys determined that the variability period should be longer than two years. ... Up to now, only two stars with periods longer than 20 years are known. ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2016/Roman/ -- 5.0 Кб -- 10.04.2016
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57. Detection of unique bright radio flare of X-ray binary
... The Galactic low-mass X-ray binary GS 2023+338 was discovered during the burst on May 22, 1989 with the Japanise satellite Ginga (aka Galaxy). The flux reached 17 crabs (this unit of flux measurement is an bright X-ray source, Crab Nebula) at 10-35 keV. ... No other radio telescope worldwide carried out multi-frequency measurements. ... Upon 14 days the radio flux fell below the detection level at the RATAN-600 in relation to the decrease of the X-ray flux. ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2016/Trushkin/ -- 8.4 Кб -- 10.04.2016
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58. Detection of Radio Transients and Variable Radio Sources Using the Archive Data
... During the analysis of the surveys carried out on RATAN-600, it was found that almost one fifth of the detected sources shows significant radio flux variations. ... We used the data from "Cold" radio surveys carried out with RATAN-600 in 1980-1994 to search for radio sources with significant flux variability. ... On possibility of detection of variable sources using the data of Cold surveys carried out on RATAN-600. ... Detection of Variable Sources Using the Data of "Cold" Surveys. ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/2016/Zhelenkova/ -- 6.9 Кб -- 10.04.2016
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59. G 89-14
... The common identifier of this star system is G89-14. Initially, there were known just two close spectroscopic components in this system, A and B, orbiting around each other with a period of about 190 days (Carney et al., ... Subsequently, at a separation of 34 arc seconds from this spectroscopic pair, Allen et al. (2000) found its companion D with common proper motion (Fig.1, right, and Fig.2). ... The uniqueness of this star is that it is the most metal-poor quadruple system known to date. ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/G89-14/ -- 5.7 Кб -- 01.10.2012
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60. Optical component of GRB080319B
Seven months ago, on Mar 19, 2008, at 09:12 Moscow time, a new star appeared on the sky. The Sun had already risen over the Russia, but people of the Western hemisphere might be able to see by their eyes a faint starlet near one of Bootes constellation stars. This starlet appeared and faded by an order of magnitude in a minute. Astronomers named it GRB080319B or, informally, the Naked-Eye Burst, as it was twice as bright as human eye can see a star. ... Royal Astronomical Society . ...
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Ссылки http://www.sao.ru/Doc-en/SciNews/GRB080319B/ -- 3.9 Кб -- 01.10.2012
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