A NOTE ON INFRARED STELLAR MAGNITUDES,

Abstract

The luminous efficiencies of the eye and a lead sulphide detector have been computed for black-body radiation over the range of temperatures from 300K to 25,000K. The ratio of these efficiencies is used to compute the infrared color index of stars from type M to type B of the spectral series; the infrared color index is here defined as the visual magnitude minus infrared magnitude, with the difference adjusted to give zero for type AO stars. The computed values of the infrared color indices are compared with those measured by Fellgett, and surprisingly good agreement is obtained. The greatest discrepancy is found for B-type stars. The discrepancies are discussed for particular stars. (Author)

Document Details

Document Type
Technical Report
Publication Date
Oct 13, 1954
Accession Number
AD0604561

Entities

People

  • Lewis Larmore

Organizations

  • RAND Corporation

Tags

DTIC Thesaurus Topics

  • Agreements
  • B Type Stars
  • Blackbody Radiation
  • Detectors
  • Efficiency
  • Electromagnetic Radiation
  • Radiation
  • Stars
  • Sulfides

Fields of Study

  • Physics

Readers

  • Astronomy and Astrophysics.
  • Image Processing and Computer Vision.
  • Spectroscopy.