2002/03/06 by R. J. Allen, Ronald J. Allen, Allen, Ronald J.
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #Astrophysics and Star Formation Studies #FOS: Physical sciences #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0203083
13 Pages, including figures and conference discussion. Invited paper, to be published in "The Dynamics, Structure, and History of Galaxies", a conference held 30 July - 2 August 2001 at Dunk Island, Australia. eds. G. S. Da Costa & E. M. Sadler (ASP Conference Series)
arxiv created 2002/03/06 · openalex publication_date 2002/03/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Young stars in the disks of galaxies produce HI from their parent H2 clouds by photodissociation. This paper describes the observational evidence for and the morphology of such HI. Simple estimates of the amount of dissociated gas lead to the startling conclusion that much, and perhaps even all, of the HI in galaxy disks can be produced in this way.