Matthew A. Kenworthy

MMT/AO 5 micron Imaging Constraints on the Existence of Giant Planets Orbiting Fomalhaut at ~13-40 AU (2008)

Kenworthy, Matthew A., Mamajek, Eric E., Hinz, Philip M., Meyer, Michael R., Heinze, Aren N., Miller, Douglas L., ...

A candidate < 3 Jupiter mass, extrasolar planet was recently imaged by Kalas et al. (2008) using HST/ACS at 12.7" (96 AU) separation from the nearby (d = 7.7 pc) young (~200 Myr) A2V star Fomalhaut....

First On-Sky High Contrast Imaging with an Apodizing Phase Plate (2007)

Kenworthy, Matthew A., Codona, Johanan L., Hinz, Philip M., Angel, J. Roger P., Heinze, Ari, Sivanandam, Suresh

We present the first astronomical observations obtained with an Apodizing Phase Plate (APP). The plate is designed to suppress the stellar diffraction pattern by 5 magnitudes from 2-9 lambda/D over a...

Thermal Infrared Constraint to a Planetary Companion of Vega with the MMT Adaptive Optics System (2006)

Hinz, Philip M., Heinze, A. N., Sivanandam, Suresh, Miller, Douglas L., Kenworthy, Matthew A., Brusa, Guido, ...

Vega may have a massive companion in a wide orbit, as evidenced by structure in its cold dust debris. We have tested this hypothesis by direct imaging with adaptive optics in the M band. The...

SDSSJ102111.02+491330.4: A Newly Discovered Gravitationally Lensed Quasar (2005)

Pindor, Bart, Eisenstein, Daniel J., Gregg, Michael D., Becker, Robert H., Inada, Naohisa, Oguri, Masamune, ...

We report follow-up observations of two gravitational lens candidates identified in the Sloan Digital Sky Survey (SDSS) dataset. We have confirmed that SDSS J102111.02+491330.4 is a previously...

SPIRAL Phase A: A Prototype Integral Field Spectrograph for the AAT (2000)

Kenworthy, Matthew A., Parry, Ian R., Taylor, Keith

We present details of a prototype fiber feed for use on the Anglo-Australian Telescope (AAT) that uses a dedicated fiber-fed medium/high resolution (R > 10000) visible-band spectrograph to give...