搜索结果: 61-75 共查到“天文学 Dust”相关记录114条 . 查询时间(0.193 秒)
A Japanese spacecraft has successfully returned what are the first samples ever obtained from the surface of an asteroid. Using microscopic methods to study the grains, researchers have confirmed that...
Genesis and evolution of dust in galaxies in the early Universe I. Modeling dust evolution in starburst galaxies
galaxies high-redshift – galaxies starburst – galaxies evolution – ISM evolution – quasars general – stars massive
2010/11/16
Aims. The aim is to elucidate the astrophysical conditions required for generating large amounts of dust in massive starburst galaxies at high redshift.
Millimeter and submillimeter high angular resolution interferometric observations: dust in the heart of IRAS 18162-2048
circumstellar matter — ISM individual (GGD27, HH 80-81 IRAS 18162-2048)— stars
2010/11/12
The GGD27 complex includes the HH 80-81-80N system, which is one of the most powerful molecular outflows associated with a high mass star-forming region observed up to now. This outflow is powered by ...
Modelling the spectral energy distribution of galaxies. V. The dust and PAH emission SEDs of disk galaxies
Radiative transfer - Scattering - (ISM): dust extinction - Galaxies spiral - Galaxies: individual
2010/11/15
We present a self-consistent model of the spectral energy distributions (SEDs) of spiral galaxies from the ultraviolet (UV) to the mid-infrared (MIR)/far-infrared (FIR)/submillimeter (submm) based on ...
Hot-Dust-Poor Quasars in Mid-Infrared and Optically Selected Samples
galaxies evolution quasars general surveys
2010/11/9
We show that the Hot-Dust-Poor (HDP) quasars found in the X-ray selected XMM-COSMOS type
1 AGN sample are just as common in two samples selected at optical/infrared wavelengthes: the
Richards et al....
The Global Gas and Dust budge of the Large Magellanic Cloud --- Importance of Asymptotic Giant Branch stars
The Global Gas Large Magellanic Cloud
2010/11/11
It is still an unresolved problemhowmuch AGB stars can contribute to the overall gas and dust enrichment processes in the interstellar medium within galaxies.We start tackling this problem, by using o...
Dust at sub-solar metallicity: the case of post-AGB stars in the Large Magellanic Cloud
Dust at sub-solar metallicity Large Magellanic Cloud
2010/11/11
Low- and intermediate-mass stars are one of the important dust sources in the interstellar medium (ISM) of galaxies. The compositions of dust ejected from these stars are likely to affect those in the...
The Bolocam Galactic Plane Survey IV: 1.1 and 0.35 mm Dust Continuum Emission in the Galactic Center Region
Galactic Plane Survey Galactic Center Region
2010/11/10
The Bolocam Galactic Plane Survey (BGPS) data for a six square degree region of the Galactic plane containing the Galactic center is analyzed and com-pared to infrared and radio continuum data. The BG...
Deep Near-Infrared Survey of the Pipe Nebula II: Data, Methods, and Dust Extinction Maps
ISM clouds – infrared ISM –stars formation
2010/11/11
We present a new set of high resolution dust extinction maps of the nearby and essentially
starless Pipe Nebula molecular cloud. The maps were constructed from a concerted deep nearinfrared imaging s...
Asymmetric Heating of the HR 4796A Dust Ring Due to Pericenter Glow
circumstellar matter planetary systems Stars individual HR 4796A, Infrared planetary systems
2010/11/11
We have obtained new resolved images of the well-studied HR 4796A dust ring at 18 and 25 μm with the 8-meter Gemini telescopes.These images confirm the previously observed spatial extent seen in mid-I...
Imaging the circumstellar dust distribution around AGB stars
Imaging the circumstellar dust AGB stars
2010/11/12
Stellar light from an AGB star is scattered by the circumstellar dust and polarized in the direction perpendicular to the source. Therefore, images of circumstellar envelopes around AGB stars in polar...
Evaluating and Improving Semi-analytic modeling of Dust in Galaxies based on Radiative Transfer Calculations II: Dust Emission in the Infrared
galaxies evolution - galaxies dust
2010/11/10
Interstellar dust grains are responsible for modifying the spectral energy distribution
(SED) of galaxies, both absorbing starlight at UV and optical wavelengths and con-verting this energy into ther...
The Origin of Dust in the Early Universe: Probing the Star Formation History of Galaxies by their Dust Content
galaxies evolution high-redshift starburst - quasars individ-ual
2010/11/11
Two distinct scenarios for the origin of the ∼ 4 × 108 M⊙ of dust observed in the high-redshift (z = 6.4) quasar J1148+5251 have been proposed. The first assumes that this galaxy is much younger...
Detection of Strong Millimeter Emission from the Circumstellar Dust Disk Around V1094 Sco: Cold and Massive Disk around a T Tauri Star in a Quiescent Accretion Phase?
stars circumstellar matter — stars individual formation
2010/11/9
We present the discovery of a cold massive dust disk around the T Tauri star V1094 Sco in the Lupus molecular cloud from the 1.1 millimeter continuum observations with AzTEC on ASTE. A compact (r .320...
Supernova dust for the extinction law in a young infrared galaxy at z = 1
dust extinction — galaxies evolution — galaxies ISM — galaxies starburst — infrared galaxies — supernovae general
2010/11/10
We apply the supernova(SN) extinction curves to reproduce the observed properties of SST J1604+4304 which is a young infrared (IR) galaxy at z ∼ 1. The SN extinction curves used in this work wer...