AAS 195th Meeting, January 2000
Session 109. Extrasolar Planets and Low Mass Objects
Display, Saturday, January 15, 2000, 9:20am-4:00pm, Grand Hall

[Previous] | [Session 109] | [Next]

[109.05] An Adaptive Optics search for Low Mass Companions in the Ursa Major Stream

D.E. Potter, A.T. Tokunaga (IfA), L.M. Close (ESO), J.E. Graves, M.J. Northcott, F. Roddier, C. Roddier (IfA), N. Kobayashi (Subaru Telescope)

We report the current status of an ongoing search for low mass companions in the Ursa Major stream using the U. of Hawaii adaptive optics (AO) system, Hokupa'a, and the CFHT user AO instrument, PUEO. The high spatial resolution (FWHMH=0.12 arcsec), high dynamic range (107 at ~3 arcsec) AO images of more than half of the Ursa Majoris stream have been obtained in a search for faint companions to these nearby (~25pc), young (~0.3 Gyr) stars. The data from these observations were image processed and Fourier filtered to enhance point source detection in real time at the telescope using a quick reduction software package written in IDL. The faint point sources detected in the field are compared to a star count model of the galaxy which estimates their probability as background stars.

If you would like more information about this abstract, please follow the link to http://www.ifa.hawaii.edu/~ao. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.

The author(s) of this abstract have provided an email address for comments about the abstract: potter@ifa.hawaii.edu

[Previous] | [Session 109] | [Next]