Instantaneous determination of a variable extinction coefficient in photoelectric photometry
نویسندگان
چکیده
منابع مشابه
uvby − β PHOTOELECTRIC PHOTOMETRY OF NGC 7063
RESUMEN Mediante fotometría de 75 estrellas en la dirección de NGC 7063 se ha deter-minado la membresia de algunas estrellas, establecido su distancia (722 ± 105 pc), su edad (log age de 8.146) y su enrojecimiento (E(b − y) = 0.091 ± 0.039 mag). ABSTRACT From uvby photometry of 75 stars in the direction of NGC 7063 we were able to determine membership of some stars and fix the distance (722 ± 1...
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Introduction: The photoelectric attenuation coefficient of substances is known to depend upon the energy E of the photon and the effective atomic number of substances (Zeff) as (Zeffx/Ey). No definitive values about these indices x, y are given in the literature. The index x is said to lie between, 3.0 and 4.0, while for ‘y’ different values have been assigned, between 3.0 and 4.0. Method...
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 1993
ISSN: 0252-9211
DOI: 10.1017/s0252921100007594