Collisional excitation of hydrogen and the determination of the primordial helium abundance from H II regions
Author:
Publisher
EDP Sciences
Subject
Space and Planetary Science,Astronomy and Astrophysics
Link
http://www.aanda.org/10.1051/0004-6361:20011303/pdf
Reference58 articles.
1. Excitation rate coefficients form the ground state of atomic hydrogen to the n = 2 and n = 3 levels
2. Electron collision cross sections at low energies for all transitions between the n=1, 2, 3, 4 and 5 levels of atomic hydrogen
3. Emission‐Line Helium Abundances in Highly Obscured Nebulae
4. The Primordial Helium Abundance as Determined from Chemical Evolution of Irregular Galaxies
5. The Primordial Helium Abundance: Toward Understanding and Removing the Cosmic Scatter in thedY/dZRelation
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