One-dimensional infrared speckle interferometry

Details One-dimensional infrared speckle interferometry One-dimensional infrared speckle interferometry

Dec 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...251l..21h&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the, Editor, vol. 251, Dec. 1, 1981, p. L21-L25. , NSF-supported research.

Astronomy and Astrophysics

Astronomy

62

Binary Stars, Infrared Astronomy, Protostars, Speckle Patterns, Stellar Envelopes, Stellar Evolution, Angular Resolution, Data Processing, Interferometry, Real Time Operation

Scientific paper

An improved technique of one-dimensional speckle interferometry, yielding high sensitivity at 2.2 to 11.6 microns, is demonstrated by initial angular measurements of seven protostellar objects. The complete visibility function of the circumstellar dust shell surrounding alpha Orionis is presented out to 1.0 cycles/arcsec. The binary character of the protostellar source W3 IRS 5 is confirmed at 5 microns, with a separation, position angle, and brightness ratio of 1.26 arcsec, 37 deg, and 1.9, respectively. The 11.9 micron speckle observations can be fitted equally well by a uniform disk of diameter 4.0 + or 0.5 arcsec, or a Gaussian diameter of 4.3 + or - 0.5 arcsec at the 1/e points, which corresponds to more than 60 stellar diameters.

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