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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/25975
Title: A high definition view of the COSMOS Wall at z ~ 0.73
Authors: IOVINO, Angela 
Petropoulou, V.
SCODEGGIO, MARCO 
BOLZONELLA, MICOL 
Zamorani, G.
BARDELLI, Sandro 
CUCCIATI, Olga 
POZZETTI, Lucia 
Tasca, L.
VERGANI, DANIELA 
ZUCCA, Elena 
Finoguenov, A.
Ilbert, O.
Tanaka, M.
Salvato, M.
Kovač, K.
Cassata, P.
Issue Date: 2016
Journal: ASTRONOMY & ASTROPHYSICS 
Number: 592
First Page: A78
Abstract: Aims: We present a study of a large filamentary structure at z ~ 0.73 in the field of the COSMOS survey, the so-called COSMOS Wall. This structure encompasses a comprehensive range of environments from a dense cluster and a number of galaxy groups to filaments, less dense regions, and adjacent voids. It thus provides a valuable laboratory for the accurate mapping of environmental effects on galaxy evolution at a look-back time of ~6.5 Gyr, when the Universe was roughly half its present age. Methods: We performed deep spectroscopic observations with VIMOS at VLT of a K-band selected sample of galaxies in this complex structure, building a sample of galaxies complete in galaxy stellar mass down to a lower limit of log(ℳ∗/ℳ☉) ~ 9.8, which is significantly deeper than previously available data. Thanks to its location within the COSMOS survey, each galaxy benefits from a wealth of ancillary information: HST-ACS data with I-band exposures down to I_AB ~ 28 complemented by extensive multiwavelength ground- and space-based observations spanning the entire electromagnetic spectrum. Results: In this paper we detail the survey strategy and weighting scheme adopted to account for the biases introduced by the photometric preselection of our targets. We present our galaxy stellar mass and rest-frame magnitudes estimates together with a group catalog obtained with our new data and their member galaxies color/mass distribution. Conclusions: Owing to our new sample we can perform a detailed, high definition mapping of the complex COSMOS Wall structure. The sharp environmental information, coupled with high quality spectroscopic information and rich ancillary data available in the COSMOS field, enables a detailed study of galaxy properties as a function of local environment in a redshift slice where environmental effects are important, and in a stellar mass range where mass and environment driven effects are both at work. -- Based on observations collected at the European Southern Observatory, Cerro Paranal, Chile, using the Very Large Telescope under program ESO 085.A-0664.
URI: http://hdl.handle.net/20.500.12386/25975
URL: https://www.aanda.org/articles/aa/abs/2016/08/aa27673-15/aa27673-15.html
ISSN: 0004-6361
DOI: 10.1051/0004-6361/201527673
Bibcode ADS: 2016A&A...592A..78I
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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