Proceedings of the International Astronomical Union

Contributed Papers

Debris Disk Science with the Palomar ExAO System: First Results

Matthew Wahla1, Stanimir Metcheva1, Rahul Patela1, Eugene Serabyna2, Dimitri Maweta6, Richard Dekanya3, Jennifer Robertsa2, Rick Burrussa2, Antonin Boucheza3a4, Tuan Truonga2, Christoph Baraneca3, Stephen Guiwitsa2, David Halea3, John Angionea2, Thang Trinha2, Jeffry Zolkowera3a5, J. Christopher Sheltona2, Dean Palmera2, John Henninga3, Ernest Cronera3, Mitchell Troya2, Dan McKennaa3 and Jonathan Tescha2

a1 Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794

a2 Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Blvd., Pasadena, CA 91109, USA

a3 Caltech Optical Observatories, California Institute of Technology, 1200 E. California Blvd., MC 11-17, Pasadena, CA 91125, USA; rgd@astro.caltech.edu

a4 Now at Giant Magellan Telescope Observatory Corp., Pasadena, CA 91106, USA

a5 Now at Department of Astronomy, Cornell University, Ithaca, NY 14853, USA

a6 European Southern Observatory (ESO), Alonso de Cordova 3107 Vitacura, 763 0355, Santiago, Chile

Abstract

We present first imaging results from the PALM-3000 adaptive optics system and PHARO camera on the Hale 5 m telescope. Observations using a vector vortex coronagraph have given us direct detections of the two-ring dusty debris system around the star HD 141569. Our observations reveal the inner clearing in the disk to unprecedentedly small angular separations, and are the most sensitive yet at the H and K bands. We are for the first time able to measure and compare the colors of the scattered light in the inner and outer dust rings, and find that the outer ring is significantly bluer than the inner ring.