STELLAR DIAMETERS AND TEMPERATURES. IV. PREDICTING STELLAR ANGULAR DIAMETERS
نویسندگان
چکیده
منابع مشابه
Infrared high angular resolution measurements of stellar sources IV. Angular diameters and effective temperatures of fifteen late-type stars
We have measured the angular diameter of fifteen late-type stars in the near-infrared using the technique of lunar occultations. Included are ten giant stars in the spectral range K0–M10, three M supergiants and two carbon stars. The resulting uniform-disk angular diameters are in the range 2.5 to 10.0 milliseconds of arc (mas), and the average formal error is 0.17 mas. In one case where the sa...
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Near-infrared lunar occultation observations of eleven late-type giants in the spectral range K0 to M6 (including one carbon star) are reported here. These stars are resolved fromour observations carried out at 2.2μm, resulting in accurate determinations of their angular sizes, with values in the range 1.4 to 7.1 milliseconds of arc (mas) and a typical accuracy of 0.12 mas. Nine out of eleven s...
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Reliable prediction of stellar diameters, particularly angular diameters, is a useful and necessary tool for the increasing number of milliarcsecond resolution studies being carried out in the astronomical community. A new and accurate technique of predicting angular sizes is presented for main sequence stars, giant and supergiant stars, and for more evolved sources such as carbon stars and Mir...
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We predict mean angular diameters and amplitudes of angular diameter variations for all monoperiodic Population I Cepheids brighter than 〈V 〉 = 8.0 mag. The catalog is intended to aid selecting most promising Cepheid targets for future interferometric observations.
متن کاملAsymptotic Giant Branch and Supergiant Stellar Diameters in the Mid-infrared
The size of the continuum photospheres of Ori, Her, R Leo, and Cyg have been measured at 11 lm using heterodyne interferometry to accuracies as high as 1%. An assortment of narrow wavelength bands near 11 lm (each having a width 0.17 cm 1) were used to avoid spectral lines. The resulting apparent diameters for Ori and Her are 30% larger than measured near-infrared sizes, whereas the Mira variab...
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ژورنال
عنوان ژورنال: The Astronomical Journal
سال: 2014
ISSN: 0004-6256,1538-3881
DOI: 10.1088/0004-6256/147/3/47