Witnessing galaxy assembly at the edge of the reionization epoch
| Autor: | Valentina D'Odorico, Fabrizio Fiore, Roberto Maiolino, Andrea Ferrara, Stefano Carniani, Chiara Feruglio, Enrico Piconcelli, Stefano Cristiani, Andrea Pallottini, Simona Gallerani, Alessandro Marconi |
|---|---|
| Přispěvatelé: | D'Odorico, V., Feruglio, C., Ferrara, A., Gallerani, S., Pallottini, A., Carniani, S., Maiolino, R., Cristiani, S., Marconi, A., Piconcelli, E., Fiore, F., ITA, D'Odorico, V [0000-0003-3693-3091], Feruglio, C [0000-0002-4227-6035], Ferrara, A [0000-0002-9400-7312], Gallerani, S [0000-0002-7200-8293], Pallottini, A [0000-0002-7129-5761], Carniani, S [0000-0002-6719-380X], Cristiani, S [0000-0002-2115-5234], Marconi, A [0000-0002-9889-4238], Piconcelli, E [0000-0001-9095-2782], Apollo - University of Cambridge Repository |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
astro-ph.GA FOS: Physical sciences Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences galaxie [submillimeter] Protein filament 0103 physical sciences 010303 astronomy & astrophysics Reionization Astrophysics::Galaxy Astrophysics Physics absorption line [quasars] Line-of-sight ISM [galaxies] 010308 nuclear & particles physics Star formation Astronomy and Astrophysics Quasar Astronomy and Astrophysic Astrophysics - Astrophysics of Galaxies Redshift Galaxy Stars 13. Climate action Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) astro-ph.CO intergalactic medium high-redshift [galaxies] Astrophysics - Cosmology and Nongalactic Astrophysics |
| Zdroj: | The Astrophysical Journal |
| ISSN: | 0004-637X 0004-6361 0004-6264 2041-8205 0035-8711 |
| Popis: | We report the discovery of Serenity-18, a galaxy at z=5.939 for which we could measure the content of molecular gas, M(H_2)~ 5 x10^9 M_sun, traced by the CO(6-5) emission, together with the metal-poor ([Fe/H]=-3.08 +- 0.12, [Si/H]=-2.86 +- 0.14) gas clump/filament which is possibly feeding its growth. The galaxy has an estimated star formation rate of ~100 M_sun yr^{-1}, implying that it is a typical main sequence galaxy at these redshifts. The metal-poor gas is detected through a damped Lyman-alpha absorber (DLA) observed at a spatial separation of 40 kpc and at the same redshift of Serenity-18, along the line of sight to the quasar SDSS J2310+1855 (z_em = 6.0025). The chemical abundances measured for the damped Lyman-alpha system are in very good agreement with those measured for other DLAs discovered at similar redshifts, indicating an enrichment due to massive PopII stars. The galaxy/Damped system we discovered is a direct observational evidence of the assembly of a galaxy at the edge of the reionization epoch. Paper published in ApJ Letters. Version corresponding to the published one |
| Databáze: | OpenAIRE |
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