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THE GRISM LENS-AMPLIFIED SURVEY FROM SPACE (GLASS). V. EXTENT AND SPATIAL DISTRIBUTION OF STAR FORMATION IN z ∼ 0.5 CLUSTER GALAXIES

  • Authors: Benedetta Vulcani, Tommaso Treu, Kasper B. Schmidt, Bianca M. Poggianti, Alan Dressler, Adriano Fontana, Marusa Bradač, Gabriel B. Brammer, Austin Hoag, Kuan-Han Huang, Matthew Malkan, Laura Pentericci, Michele Trenti, Anja von der Linden, Louis Abramson, Julie He, and Glenn Morris

2015 The Astrophysical Journal 814 161.

  • Provider: AAS Journals

Caption: Figure 5.

Cluster galaxies with ﹩0.8\lt \langle r({\rm{H}}\alpha )\rangle ﹩/﹩\langle r({\rm{F745W}})\rangle \lt 1.2.﹩ For each galaxy, in the upper panel the contour plots showing the Hα maps superimposed on the image of the galaxy in the F475W filter are shown, and in the lower panel the color composite image of the galaxy based on the CLASH (Postman et al. 2012) HST data is shown. The blue channel is composed by the F435W, F475W, F555W, F606W, and F625W (the last one only for MACS 0717) filters, the green by the F775W, F814W, F850lp, F105W, and F110W filters, and the red by the F125W, F140W, and F160W filters. In the Hα maps, different colors refer to the different PAs. Different line styles are indicated in the legend. A smoothing filter has been applied to the maps and an arbitrary stretch to the images for display purposes. Purple lines surround elongated galaxies (axis ratio in the F475W filter ﹩\ne 1\pm 0.2﹩); light blue lines surround symmetric galaxies (axis ratio in the F475W filter ∼1 ± 0.2). Arrows in the bottom right corner indicate the direction of the cluster center. The redshift of the galaxy is indicated in the top left corner.

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