Primordial Proto-Galaxies
| dc.creator | Padoan, Paolo | |
| dc.creator | Jimenez, Raul | |
| dc.creator | Dunlop, James | |
| dc.date | 1999-10-29 | |
| dc.date.accessioned | 2026-07-07T02:34:07Z | |
| dc.date.available | 2026-07-07T02:34:07Z | |
| dc.description | The first stars to form in protogalaxies must have primordial chemical composition. We refer to a protogalaxy that is forming stars of primordial composition, or very low metallicity ($Z\le 0.01 Z_{\odot}$), as ``Primordial Proto-Galaxy'' (PPG). PPGs contain little or no dust, and therefore their spectral energy distribution can be modelled from the rest-frame ultraviolet to the infrared without accounting for dust extinction and emission. We present the results of computing the photometric properties of high redshift PPGs at near-d-to-mid infrared wavelengths, that will soon be available with the new generation of infrared space telescopes, such as SIRTF and the NGST. We show that: i) PPGs at very high redshift (5<z<10) should be easily selected from deep near/mid IR surveys with a colour-colour criterion; ii) PPGs at redshift 5<z<10 can be detected at 8 $μ$m with the NGST, if they have a constant star formation rate of at least 100 M$_{\odot}/$yr; iii) once the redshift of a PPG photometric candidate is determined, its near-to-mid infrared colors should provide strong constraints on the stellar IMF at zero or very low metallicity. | |
| dc.description | Submitted to MNRAS | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9910529 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9910529 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/15117 | |
| dc.subject | Astrophysics | |
| dc.title | Primordial Proto-Galaxies | |
| dc.type | text |