Search results for "Galaxy: general"

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The Gaia-ESO Survey: Extracting diffuse interstellar bands from cool star spectra DIB-based interstellar medium line-of-sight structures at the kpc s…

2014

We study how diffuse interstellar bands (DIBs) measured toward distance-distributed target stars can be used to locate dense interstellar (IS) clouds in the Galaxy and probe a line-of-sight (LOS) kinematical structure, a potential useful tool when gaseous absorption lines are saturated or not available in the spectral range. Cool target stars are numerous enough for this purpose. We have devised automated DIB fitting methods appropriate to cool star spectra and multiple IS components. The data is fitted with a combination of a synthetic stellar spectrum, a synthetic telluric transmission, and empirical DIB profiles. In parallel, stellar distances and extinctions are estimated self-consisten…

Milky WayFOS: Physical sciencesAstrophysicsAstrophysics::Cosmology and Extragalactic Astrophysics01 natural sciencesSpectral line0103 physical sciencesAstronomy Astrophysics and CosmologyISM: general; dust extinction; ISM: lines and bandsEmission spectrum010303 astronomy & astrophysicsGalaxy: generalgeneral [Galaxy]Dust extinctionAstrophysics::Galaxy AstrophysicsISM: generalPhysicsLine-of-sightSpiral galaxygeneral [ISM]010308 nuclear & particles physicsextinctionAstronomy and AstrophysicsAstronomy and AstrophysicISM: lines and bandAstrophysics - Astrophysics of GalaxiesGalaxyISM: lines and bandsAstronomíaInterstellar mediumStars13. Climate actionSpace and Planetary ScienceAstrophysics of Galaxies (astro-ph.GA)lines and bands [ISM]dust
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THE INFLUENCE OF THE MASS DISTRIBUTION OF STELLAR OBJECTS ON THEIR GRAVITATIONAL FIELDS

2020

We study the influence of the mass randomness of astronomical objects on the distribution function of their gravitational fields. Based on purely theoretical arguments and on a comparison with extensive data collected from observations and numerical simulations, we show that while mass randomness does not alter the non-Gaussian character of the gravitational field distribution, it does changes the dependencies of mean angular momenta of galaxies and clusters on their richness. The specific form of such dependencies is determined by the interplay of the character of the mass distributions and different assumptions about cluster morphology. We trace the influence of the mass distribution on t…

PhysicsMass distributionGravitational fieldSpace and Planetary ScienceYoung stellar objectGalaxy: formation; Galaxy: generalGalaxy formation and evolutionAstronomy and AstrophysicsAstrophysicsRevista Mexicana de Astronomía y Astrofísica
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