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Primordial Molecular Emission in Population III Galaxies
| Content Provider | Semantic Scholar |
|---|---|
| Author | Mizusawa |
| Copyright Year | 2004 |
| Abstract | We study formation of molecules in primordial prestellar clumps and evaluate the line luminosities to assess detectability by next-generation facilities. If the initial H2 fraction is sufficiently high, HD becomes an important coolant in the clumps. The luminosity from such HD cooling clumps is lower than that from H2 cooling ones because of lower temperature (< 100K). As for Li reactions, we include the three-body LiH formation approximately. The Li molecular fraction remains very low (< 10) throughout the evolution owing to the high dissociative reaction rate of LiH + H → Li + H2. LiH does not become an important coolant in any density range. The luminous emission lines from the prestellar cores include H2 rovibrational lines: 1-0 Q(1), 1-0 O(3), 1-0 O(5), and pure rotational lines: 0-0 S(3), 0-0 S(4), 0-0 S(5). The next-generation facilities SPICA and JWST are able to detect H2 emission in a large pre-galactic cloud that forms metal-free stars at a high rate of ∼ 10M⊙yr −1 at redshift z < 10. We also derive an analytical expression for the luminosity that reproduces the numerical results. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://cds.cern.ch/record/886770/files/0509741.pdf |
| Alternate Webpage(s) | http://arxiv.org/pdf/astro-ph/0509741v1.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | A* search algorithm Bands Compaq LTE Computer cooling Contract agreement Cool - action Cytoskeletal Filaments Dissociative disorder Fragmentation (computing) GINS complex location GUCY2C protein, human Galaxy H2 Database Engine HD Term Type Hypoglycemia, leucine-induced Initial condition Lazarus Component Library Lithium Luminous Studio Numerical analysis Observable One Thousand RLN2 gene Redshift Stars, Celestial Word lists by frequency density wavelength |
| Content Type | Text |
| Resource Type | Article |
