HST Observations of Giant Arcs: High Resolution Imaging Of Distant Field Galaxies.

Details HST Observations of Giant Arcs: High Resolution Imaging Of Distant Field Galaxies. HST Observations of Giant Arcs: High Resolution Imaging Of Distant Field Galaxies.

1995-03-15

arxiv.org/abs/astro-ph/9503063v1

Astronomy and Astrophysics

Astrophysics

9 pages (no figures), uuencoded, compressed Postscript. Postscript text, tables and figures (803 Kb) available via anonymous f

Scientific paper

10.1086/177799

We present HST imaging of eight spectroscopically-confirmed giant arcs, pairs and arclets. These objects have all been extensively studied from the ground and we demonstrate the unique advantages of HST imaging in the study of such features by a critical comparison of our data with the previous observations. In particular we present new estimates of the core radii of two clusters (Cl0024+16, A370) determined from lensed features which are identifiable in our HST images. Although our HST observations include both pre- and post-refurbishment images, the depth of the exposures guarantees that the majority of the arcs are detected with diffraction-limited resolution. A number of the objects in our sample are multiply-imaged and we illustrate the ease of identification of such features when working at high resolution. We discuss the morphological and scale information on these distant field galaxies in the light of HST studies of lower redshift samples. We conclude that the dominant population of star-forming galaxies at z=1 is a factor of 1.5-2 times smaller than the similar group in the local field. This implies either a considerable evolution in the sizes of star-forming galaxies within the last $\sim$10 Gyrs or a shift in the relative space densities of massive and dwarf star-forming systems over the same timescale.

Affiliated with

Also associated with

No associations

Rating

HST Observations of Giant Arcs: High Resolution Imaging Of Distant Field Galaxies. does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with HST Observations of Giant Arcs: High Resolution Imaging Of Distant Field Galaxies., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and HST Observations of Giant Arcs: High Resolution Imaging Of Distant Field Galaxies. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-688484