... 227Wink This paper containes an investigation of 91 sources which appear to be point sources when observed with the angular resolution of the 100-m telescope at 4.9 GHz, teta_a = 2.6', and which we expected to be HII regions. The basic search list was prepared from the 4.9 GHz survey of the galactic plane by Altenhoff et al. ... In the present paper we list 4.9 GHz flux densities only for sources for sources for which we present new observations. ... source structure indicated . ...

... 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. ...

... However, the comparison of masses deduced from the continuum SIMBA 1.2 mm emission and virial masses (understood to trace the entire potential of the clouds) in a sample of giant molecular clouds in the Small Magellanic Cloud (SMC) by previous studies found a discrepancy between these two quantities that requires explanation. ... Methods: New observations of the southwest region of the SMC were obtained with the LABOCA camera on the APEX telescope. ...

The Arecibo Galaxy Environment Survey (normally known as AGES) is using the Arecibo Telescope to search for galaxies in a number of quite different areas of the local universe. ... NGC 628 group (precursor) - published (Auld et al., ... NGC 1156 (isolated galaxy) - published (Minchin et al, 2010, AJ, 140, 1093) . NGC 7332/9 galaxy pair - published (Minchin et al, 2010, AJ, 140, 1093) . ... NGC 5523 (isolated galaxy) - completed (contact: Robert Minchin) . ... AGES team page - password protected . ...

... An ionospheric trough is a region of decreased F layer plasma density. ... It is quite typical to make a distinction between the sub-auroral troughs at mid-latitudes, and high-latitude troughs within the auroral region or polar cap . ... working for mid-latitude trough and some types of high-latitude troughs, like the polar hole . ... Collis, P. N., and I. HДggstrЖm, Plasma convection and auroral precipitation processes associated with the main ionospheric trough at high latitudes, J. atmos. terr. ...

... Radiance image in Si iv 1402.8 (top-left, in reversed color table), Doppler velocity image (bottom-left), nonthermal velocity image (bottom-right) and HMI magnetogram (top-right) of region "A". ... The yellow box on the Doppler image outlines the region where anti-parallel flows are seen. ... A cluster of such loops was observed on the solar disk in active region NOAA11934, in the Si iv 1402.8 spectral raster and 1400 slit-jaw (SJ) images. ...

Herschel Guaranteed-Time Key Projects . at Arcetri . ... Both regard spectroscopic observations of different classes of star-forming regions in the Galaxy. WISH: WATER IN STAR-FORMING REGIONS WITH HERSCHEL . ... HS3F: HERSCHEL SPECTRAL SURVEYS OF STAR FORMATION REGIONS . ... Since gas cools mostly by line emission, knowing what molecules are formed and which lines are emitted in the different regions at different times is mandatory to understand the gas thermal balance. ...

... 1994: . Deep CCD images of the bright gamma-ray bursts GRB790418 and GRB790613 localization regions were obtained for the first time. In both cases, a faint blue star-like object (V = 24.5 m , BV m ) was detected within the region of localization of gamma-ray bursts. ... Based on sixty daily instantaneous spectra of the object SS433, obtained on the RATAN-600 in April-May 1994, we traced its variability in four very powerful flares at five frequencies. ... Archive . ...

... Here some data observed on the 6m telescope with IFP installed in the OLD focal reducer are presented. ... Mkn 3: velocity field . ... NGC 5252: [OIII] image . ... NGC 5252 was observed 23 Feb. 1998 in the [OIII]5007 emission line with CCD TK1024 as detector. ... We observed the ionized gas velocity fields of the spiral galaxies with two purpose. ... Restored velocity field of NGC 157 in the reference frame rotating with the pattern speed overlaid on the Ha image of the galaxy . ... NGC 4100 . ...

... Science Users Information > Science Activities > PhD Thesis Topics offered by ESO Faculty Members > Thesis Topic: Planetary Nebulae and HII regions in the Elliptical Galaxy NGC 5128 . ... NGC 5128 is the closest example of a giant early type (elliptical or S0) galaxy. Although often dubbed as a peculiar elliptical galaxy since it has a dust lane with recent star formation and an active galactic nucleus, the majority of early type galaxies have similar structures as revealed by recent surveys. ...

M. ( / DIAS, Ireland), A. (ISDC, Switzerland) 1 - Key Question Only 3 binary systems regularly observed in TeV: PSR B1259-63 (young pulsar +Be star, P=3.4 y) LSI +61 303 (comp. source + Be star, P=26.42 d) LS 5039 (comp. source + O star, P=3.9 d) Origin of the high-energy emission? ... 2006; Neronov &Chernyakova 2007 4 3.4 years orbital period. e~0.87 Correlated variability with a sharp rise ( "two bumps structure" ) is seen in radio, X-ray (and TeV?) bands. ...

... We proposed that information retrieved from the local surface photometric behavior of the Moon could be used for guiding the remote sensing analyses of specific geological targets. ... The value of the difference of intensities mentioned above may be used as a photometric parameter I of the local surface roughness. ... 7] Apollo 11 Prelim. ... Figure 5 represents the diagram of relationship between photometric roughness parameter and local thorium content in different lunar regions. ...

Active Region, Grevesse et al. abundances, Arnaud & Raymond ion balances . Figure 1: Emission Measures (EM) [cm -5 ] derived from combining all lines for particular ions, for the Active and Quiet Sun regions observed by SERTS. Error bars have been shown when multiple lines from the same ion have been combined to produce a single ion-averaged EM. ... Following Brosius et al. (1996), we have assumed solar coronal abundances derived by Feldman et al. ...

Astronomy Picture of the Day . The Violent Star Cluster 30 Doradus . ... The largest, most violent star forming region known in the whole Local Group of galaxies lies in our neighboring galaxy the LMC. ... The bright blue stars in this cluster, labelled NGC 2244, emit ultraviolet light that knocks electrons away from hydrogen atoms. The Iron Sun . ... Comet Hyakutake and a Solar Flare . ... During the closest approach to the Sun of Comet Hyakutake on May 1, SOHO photographed the comet. ...

. Statistics of sunspot activity . The sunspot indices . My observations . NGDC's observations . The solar regions . Links . About authors . Russian pages . The solar regions . NOAA 11300's . NOAA 11200's . NOAA 11100's . NOAA 11000's . NOAA 10900's . NOAA 10800's . NOAA 10700's . NOAA 10600's . NOAA 10500's . NOAA 10400's . NOAA 10300's . NOAA 10200's . NOAA 10100's . NOAA 10000's . NOAA 09900's . NOAA 09800's . NOAA 09700's . NOAA 09600's . NOAA 09500's . NOAA 09400's . NOAA 09300's .

... 2005 October 17 . Short Gamma-Ray Bursts Localized . ... Explanation: What causes gamma-ray bursts? ... Long duration gamma-ray bursts (GRBs) have been localized , over the past few years, to blue regions in the universe rich in star formation. ... Over the past few months, short duration GRBs have finally been localized and found to occur in different types of regions -- not only blue regions rich in star formation. ... About APOD | ...

... We report on our ongoing project ``Infrared Study of HII Regions Associated with Small Clouds.' ... These IR data, combined with optical imaging (which will be obtained from the IAC-80 telescope), IRAS survey maps, and existing CO observations of the associated clouds, will allow us to undertake a detailed investigation of the gas-to-dust mass ratio, initial mass function and the star-formation efficiency in these complexes. ... CHECKPSF: check the PSF (Point Spread Function) model, . ...

... Laboratory . ... webmaster@izmiran.ru . ... Institute of Terrestrial Magnetism, Ionosphere, and Radiowave Propagation, Russian Academy of Sciences, Troitsk, Moscow region, 142190 Russia . e-mail: karp@izmiran.ru . ... Since the MIT shape strongly depends on magnetic activity, quiet conditions (1 <= Kp <= 3) were selected to study the MIT shape diurnal variations; i.e., very quiet and slightly disturbed conditions were not considered. ... DEPENDENCE OF THE MIT SHAPE ON MAGNETIC ACTIVITY . ...

... Space Research Institute . Main . ... Main results of the experimental and theoretical research completed in 2010 . ... Moon's topography is shown based on LOLA laser altimeter data, white contour shows a permanently shadowed region and a white rhomb indicates LCROSS spacecraft impact location. ... Ultra deep survey of the sky in hard X-rays, performed by INTEGRAL observatory . INTEGRAL observatory has completed the first and the most sensitive survey of the sky in hard X-ray energy band. ...

... Young super-Jupiter found wandering without a parent . ... Astronomy for Kids . ... Tune into the Asteroid Day press conference . ... Astronomy 101 . ... How can six Trojan asteroids reside in Neptune's L4 region without colliding? ... The gravity of a planet, its star, and the centrifugal force associated with the planetary orbit nearly balance in five regions near the planetт??s path where an asteroid (or spacecraft) could orbit safely. ... Get instant access to subscriber content on Astronomy.com...