TheSpitzerSurvey of Stellar Structure in Galaxies
نویسندگان
چکیده
منابع مشابه
Stellar Populations in the Central Galaxies of Fossil Groups
It is inferred from the symmetrical and luminous X-ray emission of fossil groups that they are mature, relaxed galaxy systems. Cosmological simulations and observations focusing on their dark halo and inter-galactic medium properties confirm their early formation. Recent photometric observations suggest that, unlike the majority of non-fossil brightest group galaxies (BGGs), the central early-t...
متن کاملStellar Structure of Irregular Galaxies . Edge - On Galaxies
Stellar photometry obtained using the Hubble Space Telescope is used to study the distributions of the number densities of stars of various ages in 12 irregular and dwarf spiral galaxies viewed edge-on. Two subsystems can be distinguished in all the galaxies: a thin disk comprised of young stars and a thick disk containing a large fraction of the old stars (primarily red giants) in the system. ...
متن کاملStellar Structure of Irregular Galaxies . I . Face - on Galaxies
Stellar photometry of nearby irregular galaxies of the Local Group is used to identify and study the young and old stellar populations of these galaxies. An analysis of the spatial distributions of stars of different ages in face-on galaxies shows that the young stellar populations in irregular galaxies are concentrated toward the center, and form local inhomogeneities in star-forming regions, ...
متن کاملstellar populations in the central galaxies of fossil groups
it is inferred from the symmetrical and luminous x-ray emission of fossil groups that they are mature, relaxed galaxy systems. cosmological simulations and observations focusing on their dark halo and inter-galactic medium properties confirm their early formation. recent photometric observations suggest that, unlike the majority of non-fossil brightest group galaxies (bggs), the central early-t...
متن کاملThe first galaxies: structure and stellar populations
The Hubble Deep Fields continue to be a valuable resource for studying the distant universe, particularly at z > 2 where their comoving volume becomes large enough to encompass several hundred L∗ galaxies or their progenitors. Here I present recent results from a near–infrared imaging survey of the HDF–North with NICMOS, which provides structural and photometric information in the optical rest ...
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ژورنال
عنوان ژورنال: Publications of the Astronomical Society of the Pacific
سال: 2010
ISSN: 0004-6280,1538-3873
DOI: 10.1086/657638