Malkan, Matthew A. and Teplitz, Harry I. and McLean, Ian S. (2003) Rest Frame Optical Spectra of Lyman Break Galaxies: Other Lensing Arcs around MS1512-cB58. In: The emergence of cosmic structure. AIP Conference Proceedings (666). American Institute of Physics , Melville, NY, pp. 253-256. ISBN 0-7354-0128-4 http://resolver.caltech.edu/CaltechAUTHORS:20111013-150124579
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We have obtained near-infrared spectra of two images of the galaxy at z=2.72 which is gravitationally lensed by the foreground cluster MS1512+36. The brighter arc, cB58, is an image of only the nucleus and the southern half of the background galaxy, while the fainter image, A2, encompasses the entire background galaxy. Thus the gravitational lensing provides spatial resolution on a smaller scale than is routinely available by other methods. Our observations indicate no evidence for any systematic rotational velocity gradient across the face of this galaxy. The nucleus and outer regions of the galaxy do not differ in their gas reddening or excitation level, based on the identical Hα/5007 ratios. cB58 (which is more dominated by the nucleus) has relatively stronger continuum emission, perhaps because of a higher ratio of old to young stars, compared to the outer parts of the galaxy. A second emission line source, denoted as K1, at a slightly lower redshift was serendipitously detected in the slit. It appears to be the gravitationally lensed image of another background galaxy in the same group as cB58.
|Item Type:||Book Section|
|Additional Information:||© 2003 American Institute of Physics. Issue Date: 27 May 2003. We thank Stella Seitz for useful discussions.|
|Subject Keywords:||clusters of galaxies, gravitational lenses, infrared spectra, infrared astronomy|
|Classification Code:||PACS: 98.65.Cw; 98.62.Sb; 95.85.Jq|
|Official Citation:||Rest Frame Optical Spectra of Lyman Break Galaxies: Other Lensing Arcs around MS1512-cB58 Matthew A. Malkan, Harry I. Teplitz, and Ian S. McLean, AIP Conf. Proc. 666, 253 (2003), DOI:10.1063/1.1581800|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||13 Oct 2011 23:01|
|Last Modified:||26 Dec 2012 14:16|
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