... Due costellazioni molto brillanti si trovano ai lati opposti della stella polare: l' Orsa Maggiore e Cassiopea . ... La bandiera mostra anche come si fa a trovare la Stella Polare. Immaginate una linea che congiunge le due stelle anteriori del "carro", prolungatela dalla parte dove si trova il "timone", fino a una distanza di 5 volte la distanza tra le due stelle (nella bandiera questa distanza un po' ridotta!), e vi troverete sulla (o molto vicini alla) stella polare. ...

... About ATNF overview . ... Australia Telescope Steering Committee . ... LMC H II Region Luminosities versus . Observed Ionizing Stars . ... These values are compared to the observed H II region luminosities, yielding an estimate for the mean fraction of H-ionizing photons that escape the local nebulae in this sample. We formally estimate that, overall, 0-51% of the ionizing radiation escapes the local H II regions and is available to ionize the warm, ionized medium in the LMC. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Radio luminosity - spectral type plot for all ultracool dwarfs observed at 4.9 GHz. ... Whilst no radio emission was detected from any of the targets, significant upper limits were placed on the radio luminosities that are below the luminosities of previously detected ultracool dwarfs. Combining our results with those from the literature gives a detection rate for dwarfs in the spectral range M7 тАУ L3.5 of тИ® 9%. ...

Degree in Physics, 1980; since 1985 with the Osservatorio di Arcetri. Osservatorio Astrofisico di Arcetri . L.go E.Fermi, 5. 50125 Firenze (Italia) Tel: +39 55 2752279 . Fax: +39 55 220039 . E-mail: bandiera@arcetri.astro.it . Last modified: 21 Nov 1995

... Up: Science Data Pipelines . ... We designed and developed a package which simulates extragalactic point source data within a given field of view and SIRTF band. ... The simulator is modular and extensible to enable multi-wavelength simulations, has been optimized by utilizing parallel processing capabilities, and will be used to test pipeline software. ... The extragalactic simulator is capable of generating large numbers of galaxies within a given patch of sky for SIRTF pipeline testing. ...

... The earliest X--ray observations were carried out in the mid--1970s. X--ray luminosities of order L erg/sec were detected in the 2-11 keV range in the direction of the Orion star forming region. ... These observations showed that the O and B stars were the brightest X--ray sources, and that TTs were also associated with emission. Feigelson and Kriss (1981) showed that some of the X--ray sources were associated with PMS stars which had not been previously detected which H surveys. ...

... 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. ...

ARCSAT ID NUMBER: AS04 DESCRIPTIVE TITLE: Short Term Variability for Stars of Similar Temperatures but Different Luminosities PI: Tiffany Clements (Pewett) (GSU) OBSERVER(S): Tiffany Clements (Pewett) (GSU), Michele Silverstein (GSU), Todd Henry (RECONS Institute) UNCERTIFIED/UNTRAINED OBSERVERS: COLLABORATORS: CONTACT INFORMATION: Tiffany Clements (Pewett), pewett@astro.gsu.edu, (419)460-0072 TIME REQUESTED: We request one week for the Q2 semester. ...

Full-Text Search . ... arXiv.org . astro-ph . ... SAI VO . Search sort results by Date Relevance . ... Whitespace-separated words are treated as AND ed. Show 10 50 100 articles per page in Full Compact mode . Normalized to: Petruk, O. 30 article(s) in total . 15 co-authors, from 1 to 12 common article(s). Median position in authors list is 1,0 . Co-author(s): . Bandiera, Rino. ... Astronet | SAI MSU . ...

Elliptical galaxies Elliptical galaxies Rough subdivision · Normal ellipticals. ... Dwarf ellipticals (dE's). ... E dE BCD dSph 1013 - 1014 108 - 1013 107 - 109 109 107 - 108 300-1000 1-200 1-10 3 0.1­0.5 100 10­100 1­10 0.1­10 5­100 Elliptical galaxies Shapes of elliptical galaxies Elliptical galaxies Shapes of elliptical galaxies Elliptical galaxies Shapes of elliptical galaxies Elliptical galaxies Shapes of elliptical galaxies Elliptical galaxies ...

... The main field of my investigations is stellar spectrophotometry. As a result of scientific activity of our group spectrophotometric catalog was created including energy distribution data on 900 stars in the range 3200-7600AA and 250 stars in the range 6000-10800AA (Voloshina et al., Spectrophotometry of Bright Stars, ed. I.N.Glushneva, 1982, Moscow, Nauka, in Russian). ...

... Una de las m s divertidas es la misteriosa pericia de equilibrar huevos sobre uno de los extremos durante el Equinoccio Vernal (curiosamente, no existe tal mito para el Equinoccio Oto al). ... Divi rtase con este art culo y despu s deje que sus estudiantes lean este ejemplo de "Mala Astronom a" para bajarla del pedestal por ellos mismos. ... Combatiendo la mala astronom a en su aula . ... Lo que me encanta de este ejemplo de mala astronom a es que usted no necesariamente debe confiar en mi palabra. ...

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