Computer Simulations of Stellar-Coronagraph Observations

Details Computer Simulations of Stellar-Coronagraph Observations Computer Simulations of Stellar-Coronagraph Observations

Feb 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998pasj...50...55i&link_type=abstract

Publications of the Astronomical Society of Japan, v.50, p.55-65.

Astronomy and Astrophysics

Astronomy

6

Infrared: General, Instruments, Stars: Binaries, Stars: Pre-Main-Sequence

Scientific paper

An infrared camera optimized for stellar coronagraphic observations is now under construction for use on the Subaru 8 m telescope. This instrument, called CIAO (Coronagraphic Imager with Adaptive Optics), aims to observe faint infrared objects in the very close vicinity of a bright source, such as brown dwarfs in binary systems and protoplanetary disks. We have conducted extensive computer simulations in order to optimize the transmittance patterns of the stellar coronagraph components and to evaluate the performance of the camera for various astronomical objects. The simulations took into account atmospheric turbulence and telescope aberration, where the wavefront is expanded in terms of Zernike polynomials. We examined the effect of the truncation of the Zernike expansion to the properties of the resultant PSFs, and found that the higher terms of the Zernike expansion omitted by former studies should be included rather in the simulation for coronagraphic observations than in the simulation for direct imaging observations. The results of the simulations show that a few minute integrations will be required for the detection of a young brown dwarf in a binary system in the Pleiades, while it will take a few nights for a protoplanetary disk in the Taurus molecular cloud.

Affiliated with

Also associated with

No associations

Rating

Computer Simulations of Stellar-Coronagraph Observations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Computer Simulations of Stellar-Coronagraph Observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Computer Simulations of Stellar-Coronagraph Observations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1228380