... The Hidden Realm of Cold Interstellar Hydrogen. ... A large fraction of the neutral atomic hydrogen (H I) in the Galaxy is hidden from direct view. ...
... Array planned to begin observations in around a decade and large neutral hydrogen multibeam surveys currently underway at Arecibo, the question of what we can learn about the evolution of galaxies through neutral hydrogen observations is very timely ...
... We examine the hypothesis that cold atomic hydrogen revealed by these observations represents a phase in the evolution of the ISM marking the transformation of warm diffuse atomic hydrogen gas to molecular clouds, perhaps triggered by compression from the ...
... resolution CGPS images of atomic hydrogen emission reveal a wide-spread, cold atomic hydrogen component of the interstellar ... hydrogen revealed by these observations represents a phase in the evolution of the ISM marking the transformation of warm ...
... The Evolution of Galaxies . through the Neutral Hydrogen Window . February 1-3, 2008 . Arecibo Observatory, Puerto Rico . ... The proceedings of the conference The Evolution of Galaxies through the Neutral Hydrogen Window have now been published. ...
... Hydrogen Shadows in the Milky Way. ... Atomic hydrogen (HI) with T An alternative approach is to observe HI self-absorption (HISA) against warmer and more extensive ...
... The Evolution of Galaxies . through the Neutral Hydrogen Window . February 1-3, 2008 . Arecibo Observatory, Puerto Rico . ... Danielle Lucero . Tracing evolution of early-type spirals through the neutral hydrogen window . Salman Hameed . ...
... Hydrogen Shadows in the Galactic Sky. ... Hydrogen is the most abundant element in the universe, and in its neutral atomic phase (called ``H I ''), it is readily traced ...
... Cold clouds of hydrogen gas, from which stars may one day coalesce, reveal themselves to radio eyes as shadows against relatively warmer, brighter clouds behind them. ...