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06 October 2024 |
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The Giant Proto-Galaxy cB58; an Artifact of Gravitational Lensing? | | L.L.R. Williams
; G.F. Lewis
; | | Date: |
13 May 1996 | | Abstract: | The proto-galaxy, cB58, was discovered in the CNOC survey of cluster redshifts. Absorption features reveal that this system is at a redshift of $z=2.72$, implying an absolute magnitude of ${
m M_v sim -26}$, and a star-formation rate of $4700 {
m M_{odot} yr^{-1}}$, making it the most ``active’’ star-forming galaxy. This proto-galaxy is observed to lie close $left(sim 6scnp
ight)$ to a central cluster galaxy at $z=0.373$. The X-ray properties of the cluster suggest that its mass, and therefore its lensing potential, could be greater than that found using a virial analysis. In this Letter we argue that the phenomenal properties of this proto-galaxy are due to the gravitational lensing effect of the foreground cluster, and the unlensed properties of the source are typical of high-redshift star-forming systems. | | Source: | arXiv, astro-ph/9605062 | | Services: | Forum | Review | PDF | Favorites | |
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