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19972024
most citedWhat Powers Ultra-luminous IRAS Galaxies?

1.2k citations · 3.7k across the 64 of their papers we have counts for

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astro-ph.SR2013★ 102 cited

The Gemini NICI Planet-Finding Campaign: The Frequency of Giant Planets Around Debris Disk Stars

Zahed Wahhaj, Michael C. Liu, Eric L. Nielsen +17

We have completed a high-contrast direct imaging survey for giant planets around 57 debris disk stars as part of the Gemini NICI Planet-Finding Campaign. We achieved median H-band…

astro-ph.SR2012★ 90 cited

The Gemini NICI Planet-Finding Campaign: Discovery of a Multiple System Orbiting the Young A Star HD 1160

Eric L. Nielsen, Michael C. Liu, Zahed Wahhaj +22

We report the discovery by the Gemini NICI Planet-Finding Campaign of two low-mass companions to the young A0V star HD 1160 at projected separations of 81 +/- 5 AU (HD 1160 B) and…

astro-ph.SR2011★ 127 cited

The Gemini NICI Planet-Finding Campaign : Discovery of a Substellar L Dwarf Companion to the Nearby Young M Dwarf CD-35 2722

Zahed Wahhaj, Michael C. Liu, Beth A. Biller +23

We present the discovery of a wide (67 AU) substellar companion to the nearby (21 pc) young solar-metallicity M1 dwarf CD-35 2722, a member of the ~100 Myr AB Doradus association.…

astro-ph.SR2010★ 33 cited

The Gemini NICI Planet-Finding Campaign

Michael C. Liu, Zahed Wahhaj, Beth A. Biller +21

Our team is carrying out a multi-year observing program to directly image and characterize young extrasolar planets using the Near-Infrared Coronagraphic Imager (NICI) on the Gemin…

astro-ph.SR2010★ 149 cited

The Gemini NICI Planet-Finding Campaign: Discovery of a Close Substellar Companion to the Young Debris Disk Star PZ Tel

Beth A. Biller, Michael C. Liu, Zahed Wahhaj +24

We report the discovery of a tight substellar companion to the young solar analog PZ Tel, a member of the Beta Pictoris moving group observed with high contrast adaptive optics ima…