207 citations · 801 across the 18 of their papers we have counts for
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Searching for Mergers in Early-Type QSO Host Galaxies and a Control Sample of Inactive Ellipticals
Nicola Bennert, Gabriela Canalizo, Bruno Jungwiert +4
We present very deep HST/ACS images of five QSO host galaxies, classified as undisturbed ellipticals in earlier studies. For four of the five objects, our images reveal strong sign…
Morphologies of Two Massive Old Galaxies at z ~ 2.5
Alan Stockton, Elizabeth McGrath, Gabriela Canalizo +2
We present the results of NICMOS imaging of two massive galaxies photometrically selected to have old stellar populations at z ~ 2.5. Both galaxies are dominated by apparent disks…
Large amounts of optically-obscured star formation in the host galaxies of some type-2 quasars
M. Lacy, A. Sajina, A. O. Petric +5
We present Hubble Space Telescope images, and spectral energy distributions from optical to infrared wavelengths for a sample of six 0.3<z<0.8 type-2 quasars selected in the mid-in…
Spectacular Shells in the Host Galaxy of the QSO MC2 1635+119
Gabriela Canalizo, Nicola Bennert, Bruno Jungwiert +4
We present deep HST/ACS images and Keck spectroscopy of MC2 1635+119, a QSO hosted by a galaxy previously classified as an undisturbed elliptical. Our new images reveal dramatic sh…
Morphologies and Color Gradients of Luminous Evolved Galaxies at z~1.5
Elizabeth J. McGrath, Alan Stockton, Gabriela Canalizo +2
We have examined in detail the morphologies of seven z~1.5 passively evolving luminous red galaxies using high resolution HST NICMOS and ACS imaging data. Almost all of these galax…
Keck spectroscopy and Spitzer Space Telescope analysis of the outer disk of the Triangulum Spiral Galaxy M33
David L. Block, Francoise Combes, Ivanio Puerari +11
In an earlier study of the spiral galaxy M33, we photometrically identified arcs or outer spiral arms of intermediate age (0.6 Gyr - 2 Gyr) carbon stars precisely at the commenceme…