Sub-millimeter galaxies: Dusty, clumpy and messy starbursts in the distant universe

K. Menéndez-Delmestre, A. W. Blain, M. Swinbank, I. Smail, R. J. Ivison, S. C. Chapman, T. S. Gonçalves

Research output: Contribution to journalArticlepeer-review


We present the first spatially-resolved observations of the Hα emission in three z∼2 sub-millimeter selected galaxies (SMGs) using the Keck OH-Suppressing Infrared Imaging Spectrograph (OSIRIS) with Laser Guide Star Adaptive Optics (LGS-AO). With the unprecedent kpc-scale resolution - up to ten times that achieved with previous seeing-limited studies - and the kinematic insight that these observations provide, we unveil a clumpy Hα structure and reveal velocity offsets that suggest these systems are in an advanced merging phase. The spatially-resolved spectral information also allows us to disentangle the Hα emission arising from an active galactic nucleus (AGN) from that associated with star formation.

Original languageEnglish
Pages (from-to)85
Number of pages1
JournalRevista Mexicana de Astronomia y Astrofisica Conference Series
Publication statusPublished - 1 Oct 2014


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