Near Infrared Photometry and Absolute Magnitudes of Carbon Stars PDF Download
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Author: John Henry Baumert
Publisher:
ISBN:
Category : Astronomical photometry
Languages : en
Pages : 530
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Author: John Henry Baumert
Publisher:
ISBN:
Category : Astronomical photometry
Languages : en
Pages : 530
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Author: Russell G. Walker
Publisher:
ISBN:
Category : Astronomical photometry
Languages : en
Pages : 40
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A multi-band photoelectric photometer for making observations in the U, B, V, and infrared bands W(1.06 microns) X(1.13 microns), Y(1.63 microns) and Z(2.21 microns) was constructed and applied to both stellar and planetary observations. The results of photometry obtained for 61 stars are presented. The observations at lambda = 1.63 microns are shown to exhibit an excess flux due to a minimum in the H opacity in accordance with the predictions of model atmosphere studies. Bolometric corrections are derived for stars of late spectral type from integration of the observed absolute spectral irradiance curve. A simple photometric method for measuring stellar diameters is proposed based upon the absolute irradiance observed at 2.21 microns and the 2.21 microns flux at the surface of the star calculated from model atmospheres. Angular diameters derived by this technique are consistent with interferometric results and, when combined with the bolometric corrections, effective temperatures are found. (Author).
Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 984
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Author: International Astronomical Union. Symposium
Publisher: Springer Science & Business Media
ISBN: 9780792363460
Category : Medical
Languages : en
Pages : 672
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Proceedings of the 177th Symposium of the International Astronomical Union, held in Antalya, Turkey, May 27-31, 1996
Author: C. Jaschek
Publisher: Springer Science & Business Media
ISBN: 9400953259
Category : Science
Languages : en
Pages : 377
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Proceedings of the Strasbourg Observatory Colloquium held at Strasbourg, France, June 3-6, 1984
Author: Daniel Y. Gezari
Publisher:
ISBN:
Category : Infrared astronomy
Languages : en
Pages : 884
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Author:
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ISBN:
Category : Astronautics
Languages : en
Pages : 370
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Author:
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ISBN:
Category : Nuclear energy
Languages : en
Pages : 938
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Author: Harold L. Johnson
Publisher:
ISBN:
Category :
Languages : en
Pages : 9
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Multicolor photometric observations, were made over the range of wavelength from 0.35 microns in the ultraviolet to nearly 10 microns in the infrared, were made on thirty-nine carbon stars and six late-type long period variable stars. The bolometric corrections and effective temperatures of these stars were computed and used to construct the absolute bolometric-magnitude---effectivetemperature diagram for carbon stars. The effective temperatures of the carbon stars range from 5500 degrees K downward to 2270K. The bolometric corrections range from almost zero to nearly 5 mag. The apparent angular diameters of some of the carbon stars are as large as 0.01 inches---large enough to be measurable by a Michelson interferometer with a 50-foot beam. (Author).
Author: Daniel Y. Gezari
Publisher:
ISBN:
Category : Infrared astronomy
Languages : en
Pages : 358
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