THE GRISM LENS-AMPLIFIED SURVEY FROM SPACE (GLASS). V. EXTENT AND SPATIAL DISTRIBUTION OF STAR FORMATION IN z similar to 0.5 CLUSTER GALAXIES
Benedetta Vulcani, Tommaso Treu, Kasper B Schmidt, Bianca M Poggianti, Alan Dressler, Adriano Fontana, Marusa Bradac, Gabriel B Brammer, Austin Hoag, Kuan-Han Huang, Matthew Malkan, Laura Pentericci, Michele Trenti, Anja von der Linden, Louis Abramson, Julie He, Glenn Morris
ASTROPHYSICAL JOURNAL | IOP PUBLISHING LTD | Published : 2015
We present the first study of the spatial distribution of star formation in zsim;.5 cluster galaxies. The analysis is based on data taken with the Wide Field Camera 3 as part of the Grism Lens-Amplified Survey from Space (GLASS). We illustrate the methodology by focusing on two clusters (MACS 0717.5+3745 and MACS 1423.8+2404) with different morphologies (one relaxed and one merging) and use foreground and background galaxies as a field control sample. The cluster+field sample consists of 42 galaxies with stellar masses in the range 108-1011 Moand star formation rates in the range 1-20 Mo yr-1. Both in clusters and in the field, Hα is more extended than the rest-frame UV continuum in 60% of t..View full abstract
Awarded by NASA through Space Telescope Science Institute
Awarded by NASA
Awarded by Kakenhi from the Japan Society for the Promotion of Science (JSPS)
Support for GLASS (HST-GO-13459) was provided by NASA through a grant from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. We are very grateful to the staff of the Space Telescope for their assistance in planning, scheduling, and executing the observations. B.V. acknowledges the support from the World Premier International Research Center Initiative (WPI), MEXT, Japan, and the Kakenhi Grant-in-Aid for Young Scientists (B) (26870140) from the Japan Society for the Promotion of Science (JSPS). We thank the referee for useful comments that helped us to strengthen our results.