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Mostrando ítems 91-100 de 111
Where is OH and Does It Trace the Dark Molecular Gas (DMG)?
(Institute of Physics Publishing, 2018)
Hydroxyl (OH) is expected to be abundant in diffuse interstellar molecular gas because it forms along with
H2 under similar conditions and forms within a similar extinction range. We have analyzed absorption
measurements ...
THE EVOLUTION OF SWIFT/BAT BLAZARS AND THE ORIGIN OF THE MeV BACKGROUND
(IOP PUBLISHING LTD, 2009-07-01)
We use three years of data from the Swift/Burst Alert Telescope ( BAT) survey to select a complete sample of X-ray blazars above 15 keV. This sample comprises 26 flat-spectrum radio quasars (FSRQs) and 12 BL Lacertae (BL ...
Flows of gas through a protoplanetary gap
(Macmillan Publishers Limited., 2013-06-10)
The formation of gaseous giant planets is thought to occur in the first few million years after stellar birth. Models(1) predict that the process produces a deep gap in the dust component (shallower in the gas(2-4)). ...
Patterns in the Multiwavelength Behavior of Candidate Neutrino Blazars
(IOP Publishing, 2020)
Motivated by the identification of the blazar TXS 0506+056 as the first promising high-energy neutrino counterpart candidate, we search for additional neutrino blazar candidates among the Fermi-Large Area Telescope detected ...
DISCOVERY AND CHARACTERIZATION OF AN EXTREMELY DEEP-ECLIPSING CATACLYSMIC VARIABLE: LSQ172554.8-643839
(IOP PUBLISHING LTD, 2011-05-01)
We report the discovery of an eclipsing cataclysmic variable with eclipse depths > 5.7 mag, orbital period 94.657 minutes, and peak brightness V similar to 18 at J2000 position 17(h)25(m)54(s). 8, -64 degrees 38'39 ''. ...
The Great Markarian 421 Flare of 2010 February: multiwavelength variability and correlation studies
(IOP, 2020)
We report on variability and correlation studies using multiwavelength observations of the blazar Mrk 421 during the month of 2010 February, when an extraordinary flare reaching a level of similar to 27 Crab Units above 1 ...
SEDIGISM: Structure, excitation, and dynamics of the inner Galactic interstellar medium
(EDP Sciences, 2017-05)
Context. The origin and life-cycle of molecular clouds are still poorly constrained, despite their importance for understanding the evolution of the interstellar medium. Many large-scale surveys of the Galactic plane have ...
Dispersion of ammonia from a poultry farm in Santa Bárbara (Cundinamarca, Colombia) and its qualitative assessment
(2019)
Se hizo un análisis de la dispersión del amoníaco proveniente de una granja avícola en la vereda de Santa Bárbara, municipio de Tena (Cundinamarca, Colombia). Se utilizaron cuatro galpones de ambiente ...
Molecules, dust, and protostars in NGC 3503
(EDP Sciences, 2014-05)
Aims. We present here a follow-up study of the molecular gas and dust in the environs of the star forming region NGC 3503. This study aims at dealing with the interaction of the Hii region NGC 3503 with its parental ...
Tidal disruption events: Past, present, and future
(Wiley-VCH Verlag, 2019)
The tidal disruption of a star by a nuclear supermassive black hole was predicted in the 1970s and first confirmed by soft X-ray flares seen from quiescent galaxies in the ROSAT all-sky survey. We report here on the discovery ...