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Title: Suppressed star formation by a merging cluster system

We examine the effects of an impending cluster merger on galaxies in the large scale structure (LSS) RX J0910 at z =1.105. Using multi-wavelength data, including 102 spectral members drawn from the Observations of Redshift Evolution in Large Scale Environments (ORELSE) survey and precise photometric redshifts, we calculate star formation rates and map the specific star formation rate density of the LSS galaxies. These analyses along with an investigation of the color-magnitude properties of LSS galaxies indicate lower levels of star formation activity in the region between the merging clusters relative to the outskirts of the system. We suggest that gravitational tidal forces due to the potential of the merging halos may be the physical mechanism responsible for the observed suppression of star formation in galaxies caught between the merging clusters.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [3] ;  [4] ;  [1] ;  [5] ;  [6]
  1. Univ. of California, Davis, CA (United States)
  2. Univ. of Illinois, Urbana, IL (United States)
  3. Max Planck Inst. fur Astronomie, Heidelberg (Germany)
  4. Univ. of Hawaii, Woodlawn Drive, HI (United States)
  5. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  6. California Inst. of Technology (CalTech), Pasadena, CA (United States)
Publication Date:
Report Number(s):
LLNL-JRNL-711684
Journal ID: ISSN 1745-3925
Grant/Contract Number:
AC52-07NA27344
Type:
Accepted Manuscript
Journal Name:
Monthly Notices of the Royal Astronomical Society: Letters
Additional Journal Information:
Journal Volume: 469; Journal Issue: 1; Journal ID: ISSN 1745-3925
Publisher:
Royal Astronomical Society
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS
OSTI Identifier:
1430952