搜索结果: 1-11 共查到“高能天体物理学 formation”相关记录11条 . 查询时间(0.261 秒)
When sticking influences H2 formation
ISM: dust, extinction – ISM: molecules – ISM: abundances
2011/10/20
Aims. Interstellar dust grains, because of their catalytic properties, are crucial to the formation of H2, the most abundant molecule in the Universe. The formation of molecular hydrogen strongly depe...
Dissecting high-mass star-forming regions; tracing back their complex formation history
Dissecting high-mass star-forming regions complex formation history
2011/8/24
We present near-infrared JHKs imaging as well as K-band multi-object spectroscopy of the massive stellar content of W3 Main using LUCI at the LBT. We confirm 13 OB stars by their absorption line spect...
Formation and evolution of dwarf early-type galaxies in the Virgo cluster I. Internal kinematics
Galaxies clusters individual Virgo Galaxies dwarf Galaxies elliptical and lenticular cD Galaxies
2010/11/12
We present new medium resolution kinematic data for a sample of 21 dwarf early-type galaxies (dEs) mainly in the Virgo cluster,obtained with the WHT and INT telescopes at the Roque de los Muchachos Ob...
A Critical Examination of the X-Wind Model for Chondrule and Calcium-rich, Aluminum-rich Inclusion Formation and Radionuclide Production
Critical Examination Chondrule Calcium-rich Radionuclide Production
2010/11/16
Meteoritic data, especially regarding chondrules and calcium-rich, aluminumrich inclusions (CAIs), and isotopic evidence for short-lived radionuclides (SLRs)in the solar nebula, potentially can constr...
The GALEX Arecibo SDSS survey: III. Evidence for the Inside-Out Formation of Galactic Disks
galaxies evolution–ultraviolet galaxies
2010/11/10
We analyze a sample of galaxies with stellar masses greater than 1010M⊙ and with redshifts in
the range 0.025 < z < 0.05 for which HI mass measurements are available from the GALEX Arecibo SDSS Surve...
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...
The most recent burst of Star Formation in the Massive Elliptical Galaxy NGC 1052
galaxies individual NGC 1052 – galaxies interactions – galaxies nuclei –galaxies
2010/11/15
High-spatial resolution near-infrared (NIR) images of the central 2424 arcsec2(22 kpc2) of the elliptical galaxy NGC 1052 reveal a total of 25 compact sources randomly distributed in the region. Fi...
The Peaks Formalism and the Formation of Cold Dark Matter Haloes
gravitation - galaxies haloes - cosmology theory - dark matter – meth-ods numerical
2010/11/15
We use two cosmological simulations of structure formation to study the condi-tions under which dark matter haloes emerge from the linear density field. Our analysis focuses on matching sites of halo ...
Photospheric flux cancellation and associated flux rope formation and eruption
Sun photosphere – Sun coronal mass ejections – Sun magnetic fields
2010/11/11
Aims. We study an evolving bipolar active region that exhibits flux cancellation at the internal polarity inversion line, the formation of a soft X-ray sigmoid along the inversion line and a coronal m...
Spatially Resolved Star Formation History Along the Disk of M82 Using Multi-Band Photometric Data
galaxies individual (M82)– galaxies formation– galaxies star clusters
2010/11/12
We present the results on the star formation history and extinction in the disk of M82 over
spatial scales of 10′′ (180 pc). Multi-band photometric data covering from the far ultraviolet to the near...
Effects of Varying the Three-Body Molecular Hydrogen Formation Rate in Primordial Star Formation
galaxies formation stars formation ISM H II regions cos-mology theory
2010/11/12
The transformation of atomic hydrogen to molecular hydrogen through three-body reactions is a crucial stage in the collapse of primordial, metal-free halos,where the rst generation of stars (Populati...