FM18p.19 — Sizes and Luminosities evolution of Galaxies.

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Aug 10th at 6:00 PM until 6:00 PM

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Author(s): Sangeeta Malhotra1

Institution(s): 1. Arizona State University

Observations show that Star-formation Intensity (SFI) -- i.e. star-formation rate per unit area in galaxies -- has an upper limit. The same upper limit is seen for low redshift starburst and in galaxies upto z=6. Given that, L* in galaxy luminosity functions grows with the linear sizes of galaxies, which in turn is shown to increase as 1/H(z); where H(z) is the Hubble constant at redshift z. Lyman-alpha galaxies are a subset of high redshift galaxies and are not seen to be evolving in linear size or in L*. This hints at commonality of starburst mechanisms in galaxies.