NOAO >   Observing Info >   Approved Programs >   2014A-0353

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Proposal Information for 2014A-0353


PI: Nadia Zakamska, Johns Hopkins University, zakamska@pha.jhu.edu
Address: Dpt of Physics and Astronomy, 3400 N Charles St, Bloomberg 366, Baltimore, MD 21218, USA

CoI: Guilin Liu, Johns Hopkins University
CoI: Rachael Alexandroff, Johns Hopkins University
CoI: Jenny Greene, Princeton University
CoI: Michael Strauss, Princeton University

Title: Quasar feedback at the peak of galaxy formation epoch

Abstract: Feedback from accreting supermassive black holes is now a standard ingredient in galaxy formation models. It is seen as necessary for limiting the maximal masses of galaxies and for establishing the black- hole / bulge correlations. Using Gemini GMOS, we demonstrated that powerful ionized gas winds are a ubiquitous feature in luminous obscured z=0.5 quasars. We now propose to extend this discovery to the epoch of peak galaxy formation and quasar activity - to the era at which feedback was most prominent and the galaxy / black hole correlations were established. We request 4.5 hours of Gemini-NIFS LGS adaptive- optics observations of an extremely luminous obscured quasar at z=2.3 to map the morphology and kinematics of the ionized gas and to determine whether it exhibits the signs of black hole feedback in the form of an unbound ionized gas outflow. We will observe H(beta) and [OIII](lambda)5007Ain the H-band and H(alpha) and [NII](lambda)(lambda)6548,6583Ain the K-band on sub-galactic and galaxy-wide scales (spatial resolution 0.8 kpc, field of view 24 kpc). Obscured quasars likely constitute the majority of the quasar population and may represent the relatively early enshrouded phase of the black hole growth; thus, luminous obscured quasars are the most likely sites of quasar feedback, in agreement with our findings at low redshift.


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NOAO >   Observing Info >   Approved Programs >   2014A-0353

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