Halo characteristics and their influence on companion searches at the Starfire Optical Range

Patrick T. Ryan, Robert Q. Fugate, J. Roger P. Angel, Donald W. McCarthy, Subu Mohanty, Donald G. Sandler

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

To image extrasolar planets at their large contrast, high-resolution adaptive optics (AO) is needed to correct atmospheric seeing. The 1.5-m AO system at the Starfire Optical Range was used to confirm theoretical models. Halo levels were reduced by a factor of 4, on average, from 0.5 to 3.0 arc sec radius, which when combined with the increased Strehl ratio improved the gain by a factor of 80. Speckle lifetimes ranged from 5 to 30 ms at 0.3 arc sec, which is much longer than the 0.6-ms AO update time. These results show good agreement with predictions for current technology and reveal no limitations, in principle, to the detection of planets by use of AO systems with higher speeds and resolutions.

Original languageEnglish (US)
Pages (from-to)7035-7043
Number of pages9
JournalApplied optics
Volume37
Issue number30
DOIs
StatePublished - Oct 20 1998

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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