- 學位論文
Investigating the y-Band Images of Merging Galaxies
Investigating the y-Band Images of Merging Galaxies
摘要
本研究是使用泛星計畫(Panoramic Survey Telescope & Rapid Response System，簡稱Pan-STARRS)的y波段觀測來探討合併星系的性質。這些合併星系是來自於合併星系目錄，該目錄是由Hwang & Chang (2009) 所製作的，他們使用了紅序列星系團巡天二號計畫(Red-sequence Cluster Survey 2)所拍攝的影像找出了約莫一萬五千個合併星系，而我們將對這一萬多個合併星系進行測光的流程。我們使用由Huang & Hwang (2014) 所研發的不規則天體孔徑測光方法對這些合併星系做測光，得到初步的測光結果，接著使用史隆數位巡天計畫(SDSS)來做校正，進而得到準確的測光結果。我們使用校正過的測光資料去計算合併星系的恆星質量，得到這些合併星系的恆星質量約莫是介在1010到1012個太陽質量之間，因此我們更新了合併星系目錄，並且紀錄合併星系在y波段下的結果。
並列摘要
We study the y′−band images of merging galaxies from the observations of the Panoramic Survey Telescope & Rapid Response System (Pan-STARRS). The merging systems were selected from the merging catalog of Hwang & Chang (2009), which were identified by checking the images of the Red-sequence Cluster Survey 2from the observations of the Canada France Hawaii Telescope (CFHT). By using a homomorphic-aperture method developed by Huang & Hwang (2014), we determine the photometric results of these merging systems. To obtain results with accurate photometry, we calibrated the r′−, z′−,and y′−band data to match the results of the SDSS DR9. We used the calibrated y′−band data to investigate the stellar mass of merging galaxies. Our results show that the stellar mass of merging galaxies are about 10^10 to 10^12M⊙. We also created a new catalog to record the y′−band results of the merging galaxies.