Star Formation and Age-Metallicity Relation in a Galaxy Group NGC 4065 Thursday, 21 May 2015 09:45 (15 Minutes)

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Star Formation and Age-Metallicity Relation in a Galaxy Group NGC 4065 Thursday, 21 May 2015 09:45 (15 Minutes)

Siam Physics Congress 2015 Contribution ID: 227 Type: Oral presentation Star Formation and Age-Metallicity Relation in a Galaxy Group NGC 4065 Thursday, 21 May 2015 09:45 (15 minutes) We present a study of star formation, stellar age and metallicity, and interactions between galaxies in a low- redshift group, NGC 4065 group. Imaging data were taken from 2.4 meter telescope at Thai NationalObser- vatory (TNO) for B, V and RC broadband filters and [S II] and Red-continuum narrowband filters. There are 21 galaxies in our sample. The star formation rate is represented by the equivalent width of hydrogen alpha (EW(Hα)). Stellar age and metallicity are examined by using the Medium resolution INT Library of Empirical Spectra (MILES) for the stellar population synthesis model predictions. The result shows that most of early type galaxies (ETGs) with EW(Hα)) in the sample galaxies less than 10 Å, gas-deficient galaxies, while late type galaxies (LTGs) show more EW(Hα) and bluer than the ETGs. That means star formation activity in the LTGs could be triggered by ram-pressure stripping and tidal interaction between galaxy members due to dense environmental effect in the compact group. Primary author: Mr TASUYA, Orarik (Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand) Co-authors: Dr SAWANGWIT, Utane (National Astronomical Research Institute of Thailand,Chiang Mai 50200, Thailand); Dr KRIWATTANAWONG, Wichean (Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand) Presenter: Mr TASUYA, Orarik (Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand) Session Classification: Astronomy, Astrophysics and Cosmology (Sponsored by NARIT) Track Classification: Astronomy, Astrophysics, and Cosmology.

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