NIR Imaging Spectroscopy of IRAS FSC10214+4724: Evidence for a starburst region around an AGN at z=2.3

Astronomy and Astrophysics – Astronomy

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Scientific paper

I report 1" imaging spectroscopy of the 1.95 to 2.4mu m wavelength region in the z=2.284 galaxy IRAS F10214+4724. I find that the rest-frame Hα and [NII] emission have different spatial extents. Furthermore, broad (Delta vFWZP ~ 3500km/s) Hα emission is detected. I conclude that F10214+4724 is a very luminous gravitationally lensed galaxy which intrinsically contains both a type 1 active galactic nucleus, as well as a more extended star forming disk. The AGN and circum-nuclear star formation both contribute significantly to the total luminosity of ~ 10(13) Lsun.

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