The Magnitude of the Sun, the Stellar Temperature Scale, and Bolometric Corrections.

Abstract

view Abstract Citations (157) References Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Magnitude of the Sun, the Stellar Temperature Scale, and Bolometric Corrections. Kuiper, G. P. Abstract Three connected subjects are treated in this paper. The first section deals with the effective temperature, the absolute photovisual and bolometric magnitudes, and the spectral type of the sun. The quantities adopted are: Te 57130 (Unsold); ~ = Mbol = 4.62; spectrum dG2. The second section contains a discussion of T~ of the 0, B, and A stars. The result is given in Table 3 and shown in Figure i. In the third section, tables of bolometric correction are constructed, as far as pos- sible independently of assumptions about the shape of the spectral energy-curves. For spectral types earlier than Fo, theoretical spectral energy-curves are used; the results are found in Tables 6 and 3. For later types, empirical bolometric corrections are de- rived from Pettit and Nicholson's radiometric observations. The discussion is based on Table 7 and Figures 2 and ~; the result is given in Tables ~ and io. In the fourth section, effective temperatures are derived for late-type stars with suitable data: Castor C and the giants for which diameters were measured interfero- metrically. Limb darkening has been taken into account. The result for Castor C is 3550 ± 1100; for the giants, the values in Table ii. In the last section, color temperatures are collected and reduced to the system of effective temperatures. Particular attention is paid to the observations of the dwarfs (Tables 12 and 14), on which the reduction to effective temperatures depends to a large extent (sun). Table 13, last column, gives the derived effective temperatures for classes A-M; they are shown graphically in Figure 4. Directions are given for the calibration of temperatures derived from W. Becker's Catalogue of color indices and Pettit and Nicholson's water-cell absorptions, to effective temperatures (p. 469). Two applications are given. The result on e Aurigae reduces a difficulty previously encountered by B. Stromgren. INTRODUCTIO Publication: The Astrophysical Journal Pub Date: November 1938 DOI: 10.1086/143998 Bibcode: 1938ApJ....88..429K full text sources ADS |