We presents a study of interactions between galaxies in the low-redshift group known as the NGC 4065 group. Imaging data were taken using the 2.4 meter telescope at the Thai National Observatory (TNO) for B, V and Rc broadband filters and [S ii] and Red-continuum narrowband filters. There are 21 galaxies in our sample. The results show that most early type galaxies (ETGs) with equivalent width EW(Hα) < 10 Å are gas-deficient galaxies, while late type galaxies (LTGs) show more EW(Hα) and are bluer than the ETGs. This means that star formation activity in the LTGs could be triggered by tidal interactions between galaxy members due to dense environmental effects in the compact group.

ABSTRACT
1. INTRODUCTION
2. METHODOLOGY
3. RESULTS
4. CONCLUSIONS
REFERENCES

• Orarik Tasuya(Department of Physics and Materials Science, Faculty of Science, Chiang Mai University)
• Utane Sawangwit(National Astronomical Research Institute of Thailand)
• Wichean Kriwattanawong(Department of Physics and Materials Science, Faculty of Science, Chiang Mai University)