Investigating the y-Band Images of Merging Galaxies

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/63443

Title:	Investigating the y-Band Images of Merging Galaxies
Authors:	林依梵;Lin,Yi-fan
Contributors:	天文研究所
Keywords:	合併星系;星系;恆星質量;SDSS;Pan-STARRS;stellar mass
Date:	2014-01-20
Issue Date:	2014-04-02 14:54:00 (UTC+8)
Publisher:	國立中央大學
Abstract:	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。; 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.
Appears in Collections:	[Graduate Institute of Astronomy] Electronic Thesis & Dissertation

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