Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-12-19
Astrophys.J. 602 (2004) L9-L12
Astronomy and Astrophysics
Astrophysics
Accepted for publication in ApJ Letters. 10 pages, 3 figures. Figures have been degraded to meet size limit; a higher resoluti
Scientific paper
10.1086/382505
We report the discovery of a strongly lensed arc system around a field elliptical galaxy in Hubble Space Telescope (HST) Advanced Camera for Surveys (ACS) images of a parallel field observed during NICMOS observations of the HST Ultra-Deep Field. The ACS parallel data comprise deep imaging in the F435W, F606W, F775W, and F850LP bandpasses. The main arc is at a radius of 1.6 arcsec from the galaxy center and subtends about 120 deg. Spectroscopic follow-up at Magellan Observatory yields a redshift z=0.6174 for the lensing galaxy, and we photometrically estimate z_phot = 2.4\pm0.3 for the arc. We also identify a likely counter-arc at a radius of 0.6 arcsec, which shows structure similar to that seen in the main arc. We model this system and find a good fit to an elliptical isothermal potential of velocity dispersion $\sigma \approx 300$ \kms, the value expected from the fundamental plane, and some external shear. Several other galaxies in the field have colors similar to the lensing galaxy and likely make up a small group.
Benítez Narciso
Blakeslee John P.
Bouwens Rychard J.
Cross Nick J.
Ford Holland C.
No associations
LandOfFree
ACS Observations of a Strongly Lensed Arc in a Field Elliptical 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 ACS Observations of a Strongly Lensed Arc in a Field Elliptical, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and ACS Observations of a Strongly Lensed Arc in a Field Elliptical will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-198047