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Extinction and Dust Geometry in M83 HII Regions: A Hubble Space Telescope/WFC3 Study
Guilin Liu, Daniela Calzetti, Sungryong Hong +7
We present HST/WFC3 narrow-band imaging of the starburst galaxy M83 targeting the hydrogen recombination lines (H, H and Pa), which we use to investigate the dust extincti…
Candidate Type II Quasars at 2 < z < 4.3 in the Sloan Digital Sky Survey III
Rachael Alexandroff, Michael A. Strauss, Jenny E. Greene +12
At low redshifts, dust-obscured quasars often have strong yet narrow permitted lines in the rest-frame optical and ultraviolet, excited by the central active nucleus, earning the d…
Star Formation On Sub-kpc Scale Triggered By Non-linear Processes In Nearby Spiral Galaxies
Rieko Momose, Jin Koda, Robert C. Kennicutt +8
We report a super-linear correlation for the star formation law based on new CO(=1-0) data from the CARMA and NOBEYAMA Nearby-galaxies (CANON) CO survey. The sample includes 10…
The Paα Luminosity Function of HII Regions in Nearby Galaxies from HST/NICMOS
Guilin Liu, Daniela Calzetti, Robert C. Kennicutt +5
The HII region luminosity function (LF) is an important tool for deriving the birthrates and mass distribution of OB associations, and is an excellent tracer of the newly formed ma…
Observations of Feedback from Radio-Quiet Quasars - II. Kinematics of Ionized Gas Nebulae
Guilin Liu, Nadia L. Zakamska, Jenny E. Greene +2
The prevalence and energetics of quasar feedback is a major unresolved problem in galaxy formation theory. In this paper, we present Gemini Integral Field Unit observations of ioni…
How does star formation proceed in the circumnuclear starburst ring of NGC 6951?
T. P. R. van der Laan, E. Schinnerer, E. Emsellem +3
Gas inflowing along stellar bars is often stalled at the location of circumnuclear rings, that form an effective reservoir for massive star formation and thus shape the central reg…
Observations of Feedback from Radio-Quiet Quasars: I. Extents and Morphologies of Ionized Gas Nebulae
Guilin Liu, Nadia L. Zakamska, Jenny E. Greene +2
Black hole feedback -- the strong interaction between the energy output of supermassive black holes and their surrounding environments -- is routinely invoked to explain the absenc…