GLACE survey: OSIRIS/GTC tuneable filter H alpha imaging of the rich galaxy cluster ZwCl 0024.0+1652 at z=0.395

M. Sanchez-Portal, I. Pintos-Castro, R. Perez-Martinez, J. Cepa, A. M. Perez Garcia, H. Dominguez-Sanchez, A. Bongiovanni, A. L. Serra, E. Alfaro, B. Altieri, A. Aragon-Salamanca, C. Balkowski, A. Biviano, M. Bremer, F. Castander, H. Castaneda, N. Castro-Rodriguez, A. L. Chies-Santos, D. Coia, A. DiaferioP. A. Duc, A. Ederoclite, J. Geach, I. Gonzalez-Serrano, C. P. Haines, B. McBreen, L. Metcalfe, I. Oteo, I. Perez-Fournon, B. Poggianti, J. Polednikova, M. Ramon-Perez, J. M. Rodriguez-Espinosa, J. S. Santos, I. Smail, G. P. Smith, S. Temporin, I. Valtchanov

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Abstract

The cores of clusters at 0 less than or similar to z less than or similar to 1 are dominated by quiescent early-type galaxies, whereas the field is dominated by star-forming late-type galaxies. Clusters grow through the accretion of galaxies and groups from the surrounding field, which implies that galaxy properties, notably the star formation ability, are altered as they fall into overdense regions. The critical issues for understanding this evolution are how the truncation of star formation is connected to the morphological transformation and what physical mechanism is responsible for these changes. The GaLAxy Cluster Evolution Survey (GLACE) is conducting a thorough study of the variations in galaxy properties (star formation, AGN activity, and morphology) as a function of environment in a representative and well-studied sample of clusters. To address these questions, the GLACE survey is making a deep panoramic survey of emission line galaxies (ELG), mapping a set of optical lines ([O II], [O III], H beta and H alpha /[N II] when possible) in several galaxy clusters at z similar to 0 : 40, 0.63, and 0.86. Using the tunable filters (TF) of the OSIRIS instrument at the 10.4 m GTC telescope, the GLACE survey applies the technique of TF tomography: for each line, a set of images are taken through the OSIRIS TF, each image tuned at a different wavelength (equally spaced), to cover a rest frame velocity range of several thousand km s(-1) centred on the mean cluster redshift, and scanned for the full TF field of view of an 8 arcmin diameter. Here we present the first results of the GLACE project, targeting the H alpha /[N II] lines in the intermediate-redshift cluster ZwCl 0024.0 + 1652 at z = 0 : 395. Two pointings have been performed that cover similar to 2 x r(vir). We discuss the specific techniques devised to process the TF tomography observations in order to generate the catalogue of cluster H alpha emitters, which contains more than 200 sources down to a star formation rate (SFR)

Original languageEnglish
Article number30
Number of pages22
JournalAstronomy & Astrophysics
Volume578
DOIs
Publication statusPublished - Jun 2015

Keywords

  • galaxies: clusters: individual: ZwCl 0024.0+1652
  • galaxies: photometry
  • galaxies: star formation
  • galaxies: active
  • ACTIVE GALACTIC NUCLEI
  • HUBBLE-SPACE-TELESCOPE
  • SPECTROPHOTOMETRIC STANDARD STARS
  • EMISSION-LINE GALAXIES
  • HIGH-REDSHIFT CLUSTERS
  • DIGITAL SKY SURVEY
  • PHOTOMETRIC REDSHIFTS
  • FORMING GALAXIES
  • DISTANT CLUSTERS
  • NEARBY GALAXIES

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