DIGITAL ANALYSIS OF SPECKLE PHOTOGRAPHS: THE ANGULAR DIAMETER OF ARCTURUS

DIGITAL ANALYSIS OF SPECKLE PHOTOGRAPHS: THE ANGULAR DIAMETER OF ARCTURUS

Digital reduction of speckle interferometry data for the K2 III giant a Boo (Arcturus) has been done. Angular diameters of 0''. 019 ± were obtained at 4200 Å for a uniformly illuminated disk, and 0''. 027 ± 0'.' 010 for a highly limb-darkened disk. Arcturus is underreso...

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Veröffentlicht in:Publ. Astron. Soc. Pac., v. 88, no. 521, pp. 69-72 v. 88, no. 521, pp. 69-72, 1976-02, Vol.88 (521), p.69-72
1. Verfasser: WORDEN, SIMON P.
Format: Artikel
Sprache:eng
Schlagworte:
640102 -Physics Research-Astrophysics & Cosmology-Stars
Astronomical objects
Comparison stars
Digital images
Digital photography
DIGITAL SYSTEMS
GIANT STARS- INTERFEROMETRY
N56200 -Physics (Astrophysics & Cosmology)-Stars
Observational research
RESOLUTION
SIZE
Speckle interferometry
Stars
Telescopes
Wave diffraction
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Beschreibung
Zusammenfassung:Digital reduction of speckle interferometry data for the K2 III giant a Boo (Arcturus) has been done. Angular diameters of 0''. 019 ± were obtained at 4200 Å for a uniformly illuminated disk, and 0''. 027 ± 0'.' 010 for a highly limb-darkened disk. Arcturus is underresolved using the Kitt Peak National Observatory 4-meter telescope. The digital-reduction scheme described here proved ideal for studying such underresolved objects. A discussion of limitations of this technique is also provided.
ISSN:0004-6280
1538-3873
DOI:10.1086/129899