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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...
Archival observations from the Very Large Array (VLA) at frequencies between 1.4 GHz and 43
GHz of the 6.6-day O6.5-7+O5.5-6 binary Cyg OB2 #5 over 20 years are re-examined. The aim is to determine t...
The Crab Nebula is the only hard X-ray source in the sky that is both bright enough and steady enough to be easily used as a standard candle. As a result, it has been used as a normalization standard ...
How do dwarf galaxies acquire their mass & when do they form their stars?
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/27
We apply a simple, one-equation, galaxy formation model on top of the halos and subhalos of a high-resolution dark matter cosmological simulation to study how dwarf galaxies acquire their mass and, fo...
When photoionization is not enough。
February 15, 2007，The fact that you’re confronting this column on a web site devoted to space science and astronomy makes you roughly as rare as technetium. Despite the fact that astronomy is one of ...