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Titolo:
ANGULAR DIAMETER AND LIMB DARKENING OF ARCTURUS
Autore:
QUIRRENBACH A; MOZURKEWICH D; BUSCHER DF; HUMMEL CA; ARMSTRONG JT;
Indirizzi:
USN OBSERV,NRL,USNO,OPT INTERFEROMETER PROJECT,AD5,3450 MASSACHUSSETTS AVE NW WASHINGTON DC 20392 UNIV SPACE RES ASSOC WASHINGTON DC 20024 MAX PLANCK INST EXTRATERR PHYS D-85748 GARCHING GERMANY USN,RES LAB,REMOTE SENSING DIV WASHINGTON DC 20375
Titolo Testata:
Astronomy and astrophysics
fascicolo: 1, volume: 312, anno: 1996,
pagine: 160 - 166
SICI:
0004-6361(1996)312:1<160:ADALDO>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
INFRARED FLUX METHOD; BASE-LINE INTERFEROMETRY; K-GIANT STARS; EFFECTIVE TEMPERATURES; MICHELSON INTERFEROMETRY; MODEL ATMOSPHERES; MIRA; CALIBRATION; BETELGEUSE; CONTINUUM;
Keywords:
TECHNIQUES, INTERFEROMETRIC; STARS, ATMOSPHERES; STARS, FUNDAMENTAL PARAMETERS; STARS, INDIVIDUAL, ARCTURUS; STARS, LATE-TYPE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
43
Recensione:
Indirizzi per estratti:
Citazione:
A. Quirrenbach et al., "ANGULAR DIAMETER AND LIMB DARKENING OF ARCTURUS", Astronomy and astrophysics, 312(1), 1996, pp. 160-166

Abstract

The diameter of Arcturus has been measured with the MkIII Optical Interferometer at 5 wavelengths between 450 and 500 nm. The wavelength dependence of the uniform disk diameter agrees quantitatively with predictions from limb-darkening coefficients for a grid of model atmospheres tabulated by Manduca et al. (1977) and Manduca (1979). The true limb-darkened diameter of Arcturus is 21.0 +/- 0.2 mas. By combination of this value with the bolometric flux of (5.04 +/- 0.20) x 10(-8) Wm(-2)from the literature, the effective temperature is determined to be 4303 +/- 47 K. It is also shown that the visibility function (i.e., visibility as a function of baseline length) cannot be fitted with uniformdisk models close to and beyond the first null. The measured shape ofthe visibility function agrees well, however, with the Manduca et al.limb-darkened disk models.

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Documento generato il 25/11/20 alle ore 03:42:48