Automated Surface Photometry of Galaxies in Groups

The Undergraduate ALFALFA Team Groups Project measures environmental effects on star formation for galaxies in groups. We are exploring an automated measuring process based on the galaxy reduction package Source Extractor. Results from this process are compared with results from the Union College interactive analysis method for 79 galaxies from the galaxy groups NCG5846, NRGb027, NRGb032, NRGb137, and NRGb151. Images were obtained at the Kitt Peak National Observatory using the WIYN 0.9m telescope. Each group contains galaxies truncated in star formation rates; higher truncation rates tended to occur in denser groups. This work was supported by NASA NY Space Grant and NSF AST-1637339.