A Photometric Survey for Lyα–Heii Dual Emitters: Searching for Population III Stars in High‐Redshift Galaxies
| Autor: | Matthew A. Malkan, Yasuhiro Shioya, Celestine Grady, Daniel Schaerer, Chun Ly, Takashi Murayama, Nobunari Kashikawa, Kentaro Motohara, Tohru Nagao, Yoshiaki Taniguchi, S. S. Sasaki, Roberto Maiolino |
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| Přispěvatelé: | Laboratoire Astrophysique de Toulouse-Tarbes (LATT), Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées |
| Rok vydání: | 2008 |
| Předmět: |
Hubble Deep Field
Metallicity Population FOS: Physical sciences Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics 01 natural sciences Cosmology: Early Universe Stars: Early-Type Galaxies: Evolution 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics education 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics Physics education.field_of_study 010308 nuclear & particles physics Astrophysics (astro-ph) Galaxies: Formation Astronomy and Astrophysics Galaxy Redshift Galaxies: Starburst Stars Star cluster Space and Planetary Science [SDU.ASTR.GA]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Galactic Astrophysics [astro-ph.GA] Astrophysics::Earth and Planetary Astrophysics Subaru Telescope |
| Zdroj: | The Astrophysical Journal The Astrophysical Journal, American Astronomical Society, 2008, 680, pp.100-109. ⟨10.1086/587888⟩ |
| ISSN: | 1538-4357 0004-637X |
| DOI: | 10.1086/587888 |
| Popis: | We present a new photometric search for high-z galaxies hosting Population III (PopIII) stars based on deep intermediate-band imaging observations obtained in the Subaru Deep Field (SDF), by using Suprime-Cam on the Subaru Telescope. By combining our new data with the existing broad-band and narrow-band data, we searched for galaxies which emit strongly both in Ly_alpha and in HeII 1640 (``dual emitters'') that are promising candidates for PopIII-hosting galaxies, at 3.93 2 Msun/yr was found by our photometric search in 4.03 x 10^5 Mpc^3 in the SDF. This result disfavors low feedback models for PopIII star clusters, and implies an upper-limit of the PopIII SFR density of SFRD_PopIII < 5 x 10^-6 Msun/yr/Mpc^3. This new selection method to search for PopIII-hosting galaxies should be useful in future narrow-band surveys to achieve the first observational detection of PopIII-hosting galaxies at high redshifts. Comment: 24 pages, 10 figures, accepted for publication in ApJ |
| Databáze: | OpenAIRE |
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