Interaction effects on galaxy pairs with Gemini/GMOS- III: stellar population synthesis

• DOI: 10.1093/mnras/stw3128
• Publication Date: 2016-12-09T15:06:38Z
• Authors: A. C. Krabbe; D. A. Rosa; M. G. Pastoriza; G. F. Hägele; M. V. Cardaci; O. L. Dors; C. Winge
• Keywords: Stellar population

We present an observational study of the impacts interactions on stellar population in a sample galaxy pairs. Long-slit spectra wavelength range 3440-7300 Å obtained with Gemini Multi-Object Spectrograph (GMOS) at South for fifteen galaxies nine close pairs were used. The spatial distributions contributions using synthesis code STARLIGHT. Taking into account different to emitted light, we found that most our are dominated by young/intermediate populations. This result differs from one derived isolated where old dominates disc surface brightness. interpreted such behavior as being due effect gas inflows along disk interacting star formation time scale order about 2Gyr. also that, general, secondary has higher contribution young than primary one. compared estimated values and nebular extinctions method Hα/H\b{eta} emission-line ratio finding systematically ones factor 2. did not find any correlation between metallicities. neither metallicities ages while positive was obtained, older regions metal-rich.