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http://hdl.handle.net/20.500.12386/31892
Titolo: | Less and more IGM-transmitted galaxies from z ∼ 2.7 to z ∼ 6 from VANDELS and VUDS | Autori: | Thomas, R. PENTERICCI, Laura Le Fèvre, O. Koekemoer, A. M. CASTELLANO, MARCO Cimatti, A. FONTANOT, Fabio GARGIULO, ADRIANA GARILLI, BIANCA MARIA ROSA Talia, M. Amorín, R. BARDELLI, Sandro CRISTIANI, Stefano CRESCI, GIOVANNI Franco, M. Fynbo, J. P. U. Hathi, N. P. Hibon, P. Khusanova, Y. Le Brun, V. Lemaux, B. C. MANNUCCI, FILIPPO Schaerer, D. Zamorani, G. ZUCCA, Elena |
Data pubblicazione: | 2021 | Rivista: | ASTRONOMY & ASTROPHYSICS | Numero: | 650 | Da pagina:: | A63 | Abstract: | Aims: Our aim is to analyze the variance of the intergalactic medium (IGM) transmission by studying this parameter in the rest-frame UV spectra of a large sample of high-redshift galaxies. <BR /> Methods: We made use of the VIMOS Ultra Deep Survey and the VANDELS public survey to gain insight into the far UV spectrum of 2.7 < z < 6 galaxies. Using the SPARTAN fitting software, we estimated the IGM toward individual galaxies and then divided them into two sub-samples characterized by a transmission above or below the theoretical prescription. We created average spectra of combined VUDS and VANDELS data for each set of galaxies in seven redshift bins. <BR /> Results: The resulting spectra clearly exhibit the variance of the IGM transmission that can be seen directly from high-redshift galaxy observations. Computing the optical depth based on the IGM transmission, we find an excellent agreement with results for quasi-stellar objects. In addition, our measurements appear to suggest that there is a large dispersion of redshift where a complete Gunn-Peterson Trough occurs, depending on the line of sight. <P />VANDELS: based on observations made with ESO Telescopes at the La Silla or Paranal Observatories under programme ID(s) 194.A-2003. <P />VUDS: based on data obtained with the European Southern Observatory Very Large Telescope, Paranal, Chile, under Large Program 185.A-0791. | URI: | http://hdl.handle.net/20.500.12386/31892 | URL: | https://www.aanda.org/articles/aa/abs/2021/06/aa38438-20/aa38438-20.html http://arxiv.org/abs/2103.02946v1 |
ISSN: | 0004-6361 | DOI: | 10.1051/0004-6361/202038438 | Bibcode ADS: | 2021A&A...650A..63T | Fulltext: | open |
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