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On Oct. 19, the National Science Foundation (NSF) announced in the Federal Register the beginning of an environmental impact statement process to evaluate potential environmental impacts associated wi...
On May 23, the National Science Foundation (NSF) announced in the Federal Register the beginning of an environmental impact statement (EIS) process to evaluate potential environmental impact...
Brown Dwarfs,Stars Share Formation Process,New Study Indicates
Brown Dwarfs Stars Share Formation Process
2015/8/4
Astronomers using the Karl G. Jansky Very Large Array (VLA) have discovered jets of material ejected by still-forming young brown dwarfs. The discovery is the first direct evidence that brown dwarfs, ...
R-Process Nucleosynthesis in Dynamically Ejected Matter of Neutron Star Mergers
Nucleosynthesis Dynamically Ejected Matter Neutron Star Mergers
2011/9/28
Although the rapid neutron-capture process, or r-process, is fundamentally important for explaining the origin of approximately half of the stable nuclei with A > 60, the astrophysical site of this pr...
The Role of Tiny Grains on the Accretion Process in Protoplanetary Disks
Tiny Grains Accretion Process Protoplanetary Disks
2011/10/9
Tiny grains such as PAHs have been thought to dramatically reduce the coupling between gas and magnetic fields in weakly ionized gas such as in protoplanetary disks (PPDs) because they provide tremend...
Evolution and nucleosynthesis of extremely metal-poor and metal-free low- and intermediate-mass stars II. s-process nucleosynthesis during the core He flash
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/28
Models of primordial and hyper-metal-poor stars with masses similar to the Sun experience an ingestion of protons into the hot core during the core helium flash phase at the end of their red giant bra...
Extreme Enhancements of r-process Elements in the Cool Metal-Poor Main-Sequence Star SDSS J2357-0052
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/23
We report the discovery of a cool metal-poor, main-sequence star exhibiting large excesses of r-process elements. This star is one of two newly discovered cool subdwarfs (effective temperatures of 500...
Rapid Neutron Capture Process in Supernovae and Chemical Element Formation
Supernova—nucleosynthesis—abundance—r-process
2010/9/15
The rapid neutron capture process (r-process) is one of the major nucleosynthesis processes responsible for the synthesis of heavy nuclei beyond iron. Isotopes beyond Fe are most exclusively formed in...
Status of the tmt site evaluation process。
Rx j0513.9-6951 and v sagittae：accretion wind evolution, a Key evolutionary process to type IA supernovae
Rx j0513.9-6951 v sagittae IA supernovae
2009/6/17
Rx j0513.9-6951 and v sagittae：accretion wind evolution, a Key evolutionary process to type IA supernovae。
Effect of Particle Acceleration Process on the Flare Characteristics of Blazars
kinetic equation approach X-ray region
2009/5/19
Following the kinetic equation approach, we study the flare
processes in blazars in the optical-to-X-ray region, considering energy
dependent acceleration time-scale of electrons and synchrotron and...