Photodissociative Regulation of Star Formation in Metal‐free Pregalactic Clouds | Zendy

Kazuyuki Omukai | Zendy; Ryoichi Nishi | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

Photodissociative Regulation of Star Formation in Metal‐free Pregalactic Clouds

Author(s) -

Kazuyuki Omukai,

Ryoichi Nishi

Publication year - 1999

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/307285

Subject(s) - stars , star formation , astrophysics , reionization , physics , molecular cloud , protostar , universe , astronomy , photodissociation , star (game theory) , galaxy , chemistry , redshift , photochemistry

We study the H2 photodissociation regions around OB stars in primordial gasclouds whose virial temperatures are between a few hundred and a few thousandKelvin. In such small objects, a single O star can photodissociate a mass equalto that of the cloud itself. As a result, the clouds deplete their molecularcoolant and cannot cool in a free-fall time, and subsequent star formation istotally quenched. This indicates that stars do not form efficiently in smallobjects and that these objects contribute little to the reionization of theuniverse.Comment: 9 pages. ApJ, 518, in pres

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research