Extragalactic H2 and its variable relation to CO

F. P. Israel

Extragalactic H2 and its variable relation to CO

Astrophysics 2007-05-23 v1

Authors: F. P. Israel

Abstract

A steep metallicity dependence of the CO-to-H2 conversion factor X of the form log X = 12.2 - 2.5 log[O]/[H], based on a sample of 20 (extra)galactic determinations, is presented and discussed. The apparently less steep dependence found from millimeter interferometer observations is explained within the context of photon-dominated regions.

Cite

@article{arxiv.astro-ph/0001250,
  title  = {Extragalactic H2 and its variable relation to CO},
  author = {F. P. Israel},
  journal= {arXiv preprint arXiv:astro-ph/0001250},
  year   = {2007}
}

Comments

4 pages, 2 figures, in: "H2 in Space", Cambridge University Press, ed. F. Combes and G. Pineau des Forets

Related papers

View all related →