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A VLT colour image of the optical Einstein ring 0047-2808 | | S. J. Warren
; G. F. Lewis
; P. C. Hewett
; P. Moller
; P. Shaver
; A. Iovino
; | | Date: |
20 Dec 1998 | | Subject: | astro-ph | | Abstract: | The optical Einstein ring 0047-2808 was imaged by the VLT UT1 during the science verification programme. The ring is the image of a high-redshift z=3.595 star-forming galaxy, with strong Ly-alpha emission at 5589A, gravitationally lensed by a massive early-type galaxy at z=0.485. Relative to earlier NTT data the high signal-to-noise ratio of the VLT Ly-alpha narrow-band image allows much improved constraints to be placed on the surface-brightness profile of the source and on the mass, leading to a measured mass-to-light ratio of M/L(B)~13h for the deflector galaxy. We have combined the VLT B-band and Ly-alpha narrow-band images with a K-band image obtained at UKIRT to produce a deep colour image of the system. | | Source: | arXiv, astro-ph/9901271 | | Services: | Forum | Review | PDF | Favorites | |
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