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Hot Populations in M87 Globular Clusters

  • Authors: Sangmo T. Sohn, Robert W. O'Connell, Arunav Kundu, Wayne B. Landsman, David Burstein, Ralph C. Bohlin, Jay A. Frogel, and James A. Rose

Sohn et al. 2006 The Astronomical Journal 131 866.

  • Provider: AAS Journals

Caption: Fig. 2.

STIS FUV‐MAMA (left panels) and STIS optical‐band CCD (right panels) images. The far‐UV frames have been smoothed by a Gaussian with ﹩\mathrm{FWHM}\,=0\farcs 24﹩ (10 pixels) in order to improve the contrast of the resolved sources against the background. The CCD frames, which have larger fields of view, were cropped and scaled to match the ﹩25^{\prime \prime }\times 25^{\prime \prime }﹩ FUV‐MAMA frames. The resolved objects in the optical frames are all GCs. Most UV‐only sources in the far‐UV frames are probably background UV‐bright galaxies (see § 9). The top row shows field 1; the middle row shows field 2 with a background galaxy at right center. The bottom row shows field 3. Because of the strong background gradient in this field, we subtracted a median‐filtered image from both panels. The irregular shading in the FUV‐MAMA image is a result of co‐adding images with two different position angles.

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