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Investigating merging galaxies by using Pan-STARRS images

Authors :
Nigel Metcalfe
Po-Chieh Yu
Wen Ping Chen
Jen Chao Huang
Yi Fan Lin
Nick Kaiser
Christopher Waters
Chorng Yuan Hwang
Source :
Astronomy & astrophysics, 2017, Vol.600, pp.A28 [Peer Reviewed Journal]
Publication Year :
2017
Publisher :
EDP Sciences, 2017.

Abstract

Aims. We studied the r ′-, z ′-, and y ′-band images of merging galaxies from the observations of the Panoramic Survey Telescope & Rapid Response System (Pan-STARRS). The merging galaxies were selected from our merging catalog that was created by checking the images of the Red-Sequence Cluster Survey 2 from the observations of the Canada France Hawaii Telescope.Methods. By using the homomorphic-aperture, we determined the photometric results of these merging systems. To obtain accurate photometry, we calibrated the Pan-STARRS r ′-, z ′-, and y ′-band data to match the results of Sloan Digital Sky Survey Data Release 9. We also investigated the stellar masses of the merging galaxies by comparing the Wide-field Infrared Survey Explorer 3.4 μ m emission with the calibrated y ′-band data.Results. We present a catalog of the r ′-, z ′-, and y ′-band photometric results for 4698 merging galaxies. For extended sources, our results suggest that the homomorphic-aperture method can obtain more reasonable results than the Desktop Virtual Observatory photometry. We derived new relations between the Pan-STARRS y ′-band luminosities and the stellar masses of the merging galaxies. Our results show that the stellar masses of the merging galaxies range from 108 to 1013 M ⊙ ; some of the dry mergers could be as massive as 1013 M ⊙ .

Details

Database :
OpenAIRE
Journal :
Astronomy & astrophysics, 2017, Vol.600, pp.A28 [Peer Reviewed Journal]
Accession number :
edsair.doi.dedup.....6aae44cdb1d47782b6fc8ad1832fc1d4