We used the Vimos VLT Deep Survey in combination with other spectroscopic, photometric, and X-ray surveys from the literature to detect several galaxy structures in the Chandra Deep Field South (CDFS). Both a friend-of-friend-based algorithm applied to the spectroscopic redshift catalog and an adaptative kernel galaxy density and color maps correlated with photometric redshift estimates were used. We mainly detected a chain-like structure at z = 0.66 and two massive groups at z = 0.735 and 1.098 showing signs of ongoing collapse. We also detected two galaxy walls at z = 0.66 and at z = 0.735 (extremely compact in redshift space). The first one contains the chain-like structure and the last one contains one of the two massive groups in its center. Finally, other galaxy structures that are probably loose low mass groups were detected. We compared the group galaxy population with simulations in order to assess the richness of these structures and studied their galaxy morphological contents. The higher redshift structures appear to probably have lower velocity dispersion than the nearby ones. The number of moderately massive structures we detected is consistent with what is expected for an LCDM model, but a larger sample is required to put significant cosmological constraints.

The Vimos VLT deep survey: Compact structures in the CDFS / C. Adami, A. Mazure, O. Ilbert, A. Cappi, D. Bottini, B. Garilli, V. Le Brun, O. Le Fèvre, D. Maccagni, J.P. Picat, R. Scaramella, M. Scodeggio, L. Tresse, G. Vettolani, A. Zanichelli, M. Arnaboldi, S. Arnouts, S. Bardelli, M. Bolzonella, S. Charlot, P. Ciliegi, T. Contini, G. Covone, S. Foucaud, P. Franzetti, I. Gavignaud, L. Guzzo, A. Iovino, S. Lauger, H.J. Mccracken, B. Marano, C. Marinoni, B. Meneux, R. Merighi, S. Paltani, R. Pello, A. Pollo, L. Pozzetti, M. Radovich, G. Zamorani, E. Zucca, M. Bondi, A. Bongiorno, G. Busarello, L. Gregorini, G. Mathez, Y. Mellier, P. Merluzzi, V. Ripepi, D. Rizzo. - In: ASTRONOMY & ASTROPHYSICS. - ISSN 0004-6361. - 443:3(2005), pp. 805-818.

The Vimos VLT deep survey: Compact structures in the CDFS

L. Guzzo;D. Rizzo
2005

Abstract

We used the Vimos VLT Deep Survey in combination with other spectroscopic, photometric, and X-ray surveys from the literature to detect several galaxy structures in the Chandra Deep Field South (CDFS). Both a friend-of-friend-based algorithm applied to the spectroscopic redshift catalog and an adaptative kernel galaxy density and color maps correlated with photometric redshift estimates were used. We mainly detected a chain-like structure at z = 0.66 and two massive groups at z = 0.735 and 1.098 showing signs of ongoing collapse. We also detected two galaxy walls at z = 0.66 and at z = 0.735 (extremely compact in redshift space). The first one contains the chain-like structure and the last one contains one of the two massive groups in its center. Finally, other galaxy structures that are probably loose low mass groups were detected. We compared the group galaxy population with simulations in order to assess the richness of these structures and studied their galaxy morphological contents. The higher redshift structures appear to probably have lower velocity dispersion than the nearby ones. The number of moderately massive structures we detected is consistent with what is expected for an LCDM model, but a larger sample is required to put significant cosmological constraints.
galaxies : clusters : general; cosmology : large-scale structure of Universe
Settore FIS/05 - Astronomia e Astrofisica
2005
Article (author)
File in questo prodotto:
File Dimensione Formato  
Adami2005_aa3202-05.pdf

accesso aperto

Tipologia: Publisher's version/PDF
Dimensione 2.34 MB
Formato Adobe PDF
2.34 MB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/712108
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 33
  • ???jsp.display-item.citation.isi??? 32
social impact