Evolution of stellar population: Environments vs galaxy interactions

Josefa Perez, Patricia Tissera, Nelson Padilla, Sol Alonso, Diego G. Lambas

Research output: Contribution to journalArticlepeer-review


Several authors have studied the dependence of galaxy properties on environment in order to understand which mechanisms operate in the galaxy evolution. Recently, some of them have proposed that intermediate densities could be sites where local environment influences the transition of galaxies onto the red-sequence, as opposed to mechanisms that operate on cluster scales. Based on the evidence that interacting and merging systems are frequent at intermediate densities, we use the SDSS-DR4 data to analyse the role of close galaxy interactions as an environmental process which could contribute to lead evolutionary transformations. We explore the properties of galaxy pairs at different local and global density environments, comparing them with those of isolate galaxies in an unbiased control sample (CS).

Original languageEnglish
Pages (from-to)408-409
Number of pages2
JournalProceedings of the International Astronomical Union
Issue numberS262
Publication statusPublished - Aug 2009


  • Galaxies: evolution
  • Galaxies: interactions
  • Surveys

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Astronomy and Astrophysics
  • Nutrition and Dietetics
  • Public Health, Environmental and Occupational Health
  • Space and Planetary Science


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