UV-continuum slopes at z~4-7 from the HUDF09+ERS+CANDELS observations: Discovery of a well-defined UV-color magnitude relationship for z>=4 star-forming galaxies

Bouwens, R. J.; Illingworth, G. D.; Oesch, P. A.; Franx, M.; Labbe, I.; Trenti, M.; van Dokkum, P.; Carollo, C. M.; Gonzalez, V.; Magee, D.


Ultra-deep ACS and WFC3/IR HUDF+HUDF09 data, along with the wide-area GOODS+ERS+CANDELS data over the CDF-S GOODS field, are used to measure UV colors, expressed as the UV-continuum slope beta, of star-forming galaxies over a range of luminosity (0.1L*(z=3) to 2L*(z=3)) at high redshift (z~7 to z~4).

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