The Properties of Star-forming Regions within a Galaxy at Redshift 2 Article - Mars 2010

M. Swinbank, A. Edge, J. Richard, I. Smail, C. de Breuck, A. Lundgren, G. Siringo, A. Weiss, A. Harris, A. Baker, S. Longmore, R. Ivison

M. Swinbank, A. Edge, J. Richard, I. Smail, C. de Breuck, A. Lundgren, G. Siringo, A. Weiss, A. Harris, A. Baker, S. Longmore, R. Ivison, « The Properties of Star-forming Regions within a Galaxy at Redshift 2  », The Messenger, mars 2010, pp. 42-45

Abstract

The discovery and subsequent follow-up of one of the brightest sub-mm galaxies discovered so far is presented. First identified with the LABOCA instrument on APEX in May 2009, this galaxy lies at z = 2.32 and its brightness of 106 mJy at 870 µm is due to the gravitational magnification caused by a massive intervening galaxy cluster. Follow-up observations with APEX SABOCA have been used to constrain the far-infrared spectral energy distribution and hence measure the star formation rate, and Swedish Heterodyne Facility Instrument observations help constrain the excitation of the cold molecular gas. Furthermore, high resolution follow-up with the sub-mm array resolves the star-forming regions on scales of just 100 parsecs. These results allow study of galaxy formation and evolution at a level of detail never before possible and provide a glimpse of the exciting possibilities for future studies of galaxies at these early times, particularly with ALMA.

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