... Early studies of PMS stars focused on T associations, especially Taurus-Auriga. However, one might expect low mass star formation to be different in OB associations. ... He identified Orion OB1a as the stars northwest of the belt. Orion OB1b is composed of the stars near the belt, including the belt stars and Orionis. ... He finds no perceptible distance change within the Orion OB1b association and finds the distance modulus to be 7.8 and 7.9 for Orion OB1a and OB1b respectively. ...

Next: Other People's Software . ... Quality system management of computer workstations for astronomy can be achieved with relatively small manpower requirements, if the right cost-effective administrative design decisions are made. ... This is all done with essentially one system manager. ... The system is designed so that one doesn't depend on four or more hosts, (such as a software server, cpu server, data file server, font server, etc.) to get work done. ...

... HD144941 is a B type hydrogen-deficient star. ... However, its H/He ratio puts it between the classifications of an extreme and an intermediate helium star, and its low C and N abundances make it unique amongst known H-deficient stars. ... Keywords. stars: helium stars -- stars: individual stars (HD144941) -- stars: atmospheres -- stars: abundances -- stars: oscillations -- stars: evolution . ... The iron abundance in the helium star HD144941 has been measured from ultraviolet Fe III lines. ...

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. ...

... Observing . ... Solar Observing . ... April 3 (SUN) - Solar Observing, Central Park , Manhattan . ... APRIL'S SKY . ... Lecture Series at the American Museum of Natural History The Amateur Astronomers Association is proud to present an astronomy lecture series from October through May each year for our members and the .. ... The€аAmateur Astronomers Association of New York€аwas organized in 1927 to promote the study of Astronomy, emphasizing its cultural and inspirational value. ...

... По ПЗС-спектрам, полученным с эшелле-спектрометром PFES 6-м телескопа, впервые методом моделей атмосфер определены эффективная температура , ускорение силы тяжести и детальный химический состав слабой звезды, отождествляемой с ИК-источником . IRAS23304+6147. ... Значения эффективной температуры атмосферы объекта, полученные независимо методом моделей атмосфер и путем моделирования распределения энергии в оптическом и инфракрасном диапазонах, совпадают в пределах точности методов. ...

... The molecular content of the DMTau and GGTau disks . ... 317, P L55-L58 (1997). ... Article in PDF format . ... 317, P L59-L62 (1997). ... 317, P L63-L66 (1997). ... 317, P L67-L70 (1997). ... 317, P L71-L74 (1997). ... 317, P L75-L78 (1997). ... 317, P L79-L81 (1997). ... 317, P 303-317 (1997). ... 317, P 318-327 (1997). ... 317, P 328-349 (1997). ... 317, P 350-357 (1997). ... 317, P 358-384 (1997). ... 317, P 385-392 (1997). ... 317, P 393-396 (1997). ... helpdesk@link.springer.de . ...

... All the galaxies are divided into 4 groups depending on the environment type; every subsample contains more than 10 galaxies. ... An effect of environments is seen both for the nuclei and for the bulges: if we consider the clusters (Virgo and Ursa Ma jor) and group centers as dense environments and the field and group periphery as sparse environments, then in the dense environments the stellar populations of S0s are in average older by 4­5 Gyr than in the sparse ones. ...

Mikhail Medvedev (University of Kansas) HEA- 2007 , IKI, Moscow Missing baryons in inter-cluster gas Afshordi, et al, 2007 , astro-ph/0612700 35% +/- 8% Sample of 260 clusters WMAP SZ 3yr data Compared with 11 simulated clusters Assumed: Universal NFW profile Self-similarity Isothermal gas Possible explanations Observed stellar mass in galaxies: ~ 10% (Lin, et al, ... Simulations indicate that the effect is small (Dolag, et al, 2004) Can account for ~1-2% missing mass at most ...

University Satellites and . Space Science Education . ... It is necessary to select a topic interesting from scientific point of view and simple enough to allow students understand and participate in all stages of experiment from measurements via data analysis to physical inference. ... Solar modulation effects and physical characteristics and analysis of the major solar events are possible only by joining data from space-born and surface particle and radiation detectors. ...

... 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. ...

. You can compare any two versions of a file that is under the control of SCCS with the sccsdiff command: /usr/sccs/sccsdiff -r version -r version s. filename . Using this command produces a line by line difference between the two versions of the file. Results are shown in the same format as that produced by the diff command. Examples .

... Near-IR broad-band imaging of V1318 Cygni reveals the presence of two distinct stellar components oriented north-south, a result recently reported by Aspin et al. ... The distribution of the high density molecular gas traced by the CS J emission is highly concentrated around V1318 and V1686 Cygni, while the total column density of gas traced by the J shows a ridge morphology centered on these sources. ... A molecular outflow has been detected in CO J . ...

LIPSKIY-RODIONOVA' LUNAR ANTIPODES AS PRECURSORS OF A REGULAR WAVE PLANETOLOGY G.G.Kochemasov IGEM of the Russian Academy of Sciences, Moscow, Russia kochem@igem.ru / Fax: (009)(095)230 21 79 The first observations of the lunar far side allowed to compare it with the near side and draw very important conclusions in the very beginning of planetary studies based on spacecrafts. ... Celestial bodies are dichotomic. ... The concept of celestial bodies includes Sun (a star) as one of them. ...

... The design, fabrication and testing of a reliable, low-cost, multiplexed temperature measurement system with a resolution and stability approaching 0.01њ C is described. This system, with 176 temperature sensors, will be used to monitor the performance of a 3.5 m borosilicate mirror ventilation system. ... We have assembled and tested a simple and reliable temperature measurement system with 176 sensors and a differential drift over two weeks of less than 0.07њC peak to peak. ...

... astro-ph . ... Whitespace-separated words are treated as AND ed. Show 10 50 100 articles per page in Full Compact mode . ... Quasar Variability in the Framework of Poissonian Models . ... It is shown that in this very general framework the well established anti-correlation between variability amplitude and wavelength can only be understood as an effect of an underlying spectral component which remains stable on long time-scales, and is redder than the variable component. ...

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. ...

Trudy GAISH, vol. LXV, 1996 . Abstracts . The global distribution of average (5 O x 5 O ) depths . of Mohorovicic discontinuity on the Earth . ... Such analysis allows detecting whether the sources of the largest anomalies reside within the Earth's core. This is possible if the limit depths of the sources exceed the depths of the core-mantle boundary. ... by Pasinok S.L. Influence of the Earth’s cover on the polar free oscillation of the Earth’s inner core is considered. ...

VASYL MYKOLAYOVYCH IVCHENKO . ... ASTRONOMY and SPACE PHYSICS, KIEV UNIVERSITY, KIEV, UKRAINE . EDUCATION 1966-1971 : student, Kiev University, Faculty of Physics, Astronomy Dept., graduated 1971, diploma ? ... Thesis: "Optical observations of the effects of electron beams injections in control space experiments". ... Kiev University. ... Faculty of Physics, Kiev University. ... Kiev, 1995. ... Address : T.Shevchenko Kiev University, Faculty of Physics, Astronomy and Space Physics Dept., ...

Russian SHAREABLE DATA CENTER Institute of Solar-Terrestial Physics SB RAS . ... Although their determination is based on the scattering process model, independent check-ups by rocket experiments have shown their correctness in experimental applications. ... Ionospheric data analysis, especially during strong disturbances, cannot be without some other kinds of diagnostic tools. ... The lack of data has always been a challange in this case. ...