... We present an analysis of an optical blue spectrum of the pulsating helium star V652 Her (=BD+13 3224$) in order to determine its effective temperature, surface gravity and chemical composition. ... The surface composition is characterised by abundances of nH=0.009, He=0.988, nC~0.000040, nN=0.0025 and nO=0.00010 (number fractions). ... If V652 Her was formed by the merger of two white dwarfs, its surface composition demands that they should both be helium white dwarfs. ...

... Дни открытых дверей к юбилею САО РАН (12-14 апреля 2016 г.) . Международная конференция "Dark Ages and White Nights (Spectroscopy of the CMB)" (20-24 июня 2016 г.) . ... Международная конференция MULTI-SPIN GALAXIES - 2016 (26-30 сентября 2016 г.) . Международная астрономическая конференция "Физика звезд: от коллапса до коллапса" (3-7 октября 2016 г.) Архив . ... Подробнее.. ... 10.02.16 . ... БТА в реальном времени . ... Цейсс-1000 в реальном времени . ... Последнее обновление: 22/03/2016 ...

Physics of Magnetic Stars, 2007, pp. ... The sp ectra taken with the 6 m telescop e are used to determine the radial velo cities and pro jected rotational velo cities for 32 newly discovered magnetic CP stars. ... Our observational data -- Zeeman sp ectra taken within the framework of the program for the search for new magnetic stars can b e used for determination of radial velo cities (V r ) and pro jected rotational velo cities (v e sin i). ... Our new sample features more distant ob jects. ...

... Master . Master net Homepage . ... Ten years ago it was realized that robotic observatories boost the capabilities of astronomical observations of non-stationary and short-lived phenomena in the Universe. ... The first Russian robot-telescope MASTER was developed in 2002 and installed nearby Moscow. ... OAO MO "Optica" has mastered the production of such systems. The workshop is devoted to the results achieved by MASTER-net, that recently stretch over the globe from Blagoveshensk to Argentina. ...

... We computed the permanently shadowed areas and temperatures inside the craters for the variation of the position of the lunar pole of rotation with respect to the ecliptic pole with a period of 18.6 years. ... According to our results, the total permanently shadowed area in the polar craters of the Moon is equal to 50428.7 km2, or 0.13% of the total area of the lunar surface [3]. ... The area of permanently shaded part of a crater makes 59 % from all area of a crater [3]. ...

... The name Discovery Date mag Size(m) Publication MASTER -Observatory --------------------------------------------------------------------------------------------------------------------------- HAZARDOUS ASTEROIDS : 7 MASTER HAZARD Asteroid 2015 UM67 2015 Oct 28.88218 16.9 940m MPEC 2015-V01 MASTER -SAAO automatically MASTER software 6 MASTER rediscovered HAZARD Asteroid 2011 QG21 2015 Aug 17.94764 17.2 300m MPEC 2015-Q28 ...

Authors: V.A. Marsakov , Yu.G. Shevelev , . Journal: 1988, Astron Zh. ... Absolute magnitudes, metallicities, effective temperatures, surface gravities, distances, and tangential velocities are calculated for 5498 F stars with homogeneous data on uvby photometry and proper motion, and placed within 80 pc from the Sun. Components of space velocities, eccentricities of galactic orbits, perigalactic and apogalactic distances, and maximal remotness from galactic plane are presented for 1787 stars. ...

Born in the UK, and following degrees at the Univerities of Bristol and Sussex, Martin Elvis got his PhD under Prof. Ken Pounds at the University of Leicester (UK) in 1978 for work with the Ariel V satellite. Ariel V was only the 2nd satellite to be devoted to X-ray astronomy. ... His PhD thesis demonstrated that powerful X-ray emission was a normal feature of Active Galactic Nuclei (or "AGN"). AGN X-ray emission has been a lively area of research ever since. ...

... Over the first 4 years, its X-ray telescopes eROSITA and ART-XC will survey the whole sky with a record sensitivity in the 0.5-10 keV energy band. ... The goal of the second international Spectrum-RG conference is to discuss the different scientific topics addressed by the mission, synergies with surveys at other wavelengths, and requirements to follow-up observations.Contributed talks and poster presentations are invited on the topics related to the SRG science goals. ... Active galactic nuclei . ...

... 18941904; Bespalov P.A. Effective saturation of absorption in a plasma magnetospheric maser. In book: Nonlinear Space Plasma Physics, R.Z. Sagdeev -Editor-in-Chief, American Institute of Physics, 1993, p.339-346]. Magnetospheric plasma maser [Bespalov P.A, Trakhtengerts V.Yu., ... In a magnetospheric plasma maser (MPM) the relatively dense magnetised plasma and the conjugate ends of a magnetic trap form a quasioptical resonator for electromagnetic waves. ...

Andrey Kravtsov . ... Andrey Tatarnikov . Sternberg Astronomical Institute . ... Astronomical Institute (Ondrejov, Czech Republic) . ... Paris-Meudon-NanГay Observatory . NMSU Astronomy Department . Institute of Theoretical Astrophysics (Norway) . Big Bear Solar Observatory . ... SOHO - The Solar and Heliospheric Observatory . Ulysses Project - ESA page . ... Abstracts from Astronomy Astrophysics . ... Solar Astronomy . ... Astronomy astrophysics preprints abstracts . ...

. V L B I L a b o r a t o r y .

Title: A New Model of the Gravitational Lens 0957+561 and a Limit on the Hubble Constant . Authors: Norman A. Grogin , Ramesh Narayan (Harvard Univ.) ... Title: ROSAT/PSPC observation of the distant cluster CL0939+472 . ... Title: Interaction in the Bimodal Galaxy Cluster A3528 . ... Title: Cosmological Implications of Galaxy Cluster Evolution . ... Title: Galaxy Cluster Virial Masses and Omega . ... Matches 201 to 222 from a total of 222 matches for the search pattern galaxy cluster . ...

SITE 2010 Comprehensive Characterization of Astronomical Sites Kislovodsk, Russia, 49 October 2010 Conference Summary Marc S. Sarazin*a a European Southern Observatory, Garching, Germany Abstract The main topics discussed during the Site 2010 conference are outlined and the outcome is described. Keywords: Astronomical Site testing, precipitable water vapor, atmospheric turbulence, cloudiness, seeing 1. ... Site surveys for National observatory projects in China, India, and Iran benefit from this. ...

... SOLAR WEB RESOURCES AND RESEARCH SITES LINKS . ... http :// solar .nro.nao.ac.jp/ - The Nobeyama Radioheliograph : daily solar images at 17 GHz. http ://umbra.nascom.nasa.gov/batse/batse_years.html - CGRO BATSE solar flare database at the SDAC. http ://umbra.nascom.nasa.gov/yohkoh_archive.html - The Yohkoh Archive. ftp://140.252.1.21/kpvt/ daily - U.S. National Solar Observatory at Kitt Peak anonymous ftp directories. http ://www.bbso.njit.edu - Big Bear Solar ...

... 330, P L21-L24 (1998). Abstract . ... 330, P L25-L28 (1998). ... 330, P L29-L32 (1998). ... 330, P L33-L36 (1998). ... 330, P L37-L40 (1998). ... 330, P L41-L44 (1998). ... 330, P L45-L48 (1998). ... Number counts and redshift distribution of gravitational arclets as a probe of galaxy evolution . ... 330, P 399-411 (1998). ... 330, P 412-418 (1998). ... 330, P 419-422 (1998). ... 330, P 423-434 (1998). ... The stellar content of the Sagittarius Dwarf Galaxy . ... helpdesk@link.springer.de ...

... 1621, 2015 April 20 Conrmation of Pulsed Radio Emission from the Pulsar J1907+0919 (Shitov Radio Pulsar, SGR 1900+14) A.P. Glushak, B.Ya. ... Observations at a frequency of 111 MHz with the Large Phased Array at the Pushchino Radio Astronomy Observatory of the Astro Space Center of the P.N. Leb edev Physical Institute conrm the pulsed radio emission of the X-ray pulsar J1907+0919 that is a counterpart of the magnetar SGR 1900+14. ... The average p erio dogram of PSR J1907+0919 is shown in Fig. ...

... Astronomy search engine . ... PhysicsWeb Home Page . ... Sternberg Astronomical Institute . ... Astro Space Center Home Page . ... Landau Institute for Theoretical Physics . ... Astronomy and Space Physics Dept of Kiev University . ... NATIONAL RADIO ASTRONOMY OBSERVATORY Home Page . University of Hawaii - Institute for Astronomy . ... Space Telescope Science Institute Home Page . ... Sky & Telescope: The Essential Magazine of Astronomy . ... Springer LINK - Physics Online Library . ... Home . ...

... We have compared visualized fields of GSC and USNO A1.0 catalog with unpublished photographic finding charts that were sent by L. Plaut to the compilers of the GCVS. ... 7-15 A9 --- GCVS GCVS or NSV name 17-25 F9.4 --- GSC GSC number 26 A1 --- NoteFlag *Nonstar (GSC) flag 28-29 I2 h RA2000GSC.h Hours RA (GSC), equinox 2000.0 31-32 I2 min RA2000GSC.m Minutes RA (GSC), equinox 2000.0 34-38 F5.2 s RA2000GSC.s Seconds RA (GSC), equinox 2000.0 40 A1 --- DE2000GSC.- ... Plaut, L., 1966, Bull. ...

Lisnyky observatory of A&SPD is located in the village of Lisnyky in Kyiv region. AZT-8 (right) Diameter 0.7 m, Newton, Cassegren. ... Spiral jets of comet Hale-Bopp have been observing on the 3-rd of April, 1997 with 70-cm reflector and image intensifier, time of exposure: 1 second, field of vision: 1.5 minute of arc. This color image was obtained with Fuji color film (Super Plus 400) in focal plane of the 70-cm reflector (F = 27 m) at Lisniki Observatory by A.M.Evtushevsky. ...