========================================================================== J/A+A/501/297 Effective temperatures of B Supergiants (Zorec+, 2009) The following files can be converted to FITS (extension .fit or fit.gz) table2.dat table5.dat ========================================================================== Query from: http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=J/A+A/501/297 ==========================================================================
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Beginning of ReadMe : J/A+A/501/297 Effective temperatures of B Supergiants (Zorec+, 2009) ================================================================================ Fundamental parameters of B Supergiants from the BCD System. I. Calibration of the (lambda_1_, D) parameters into T_eff_. Zorec J., Cidale L., Arias L., Fremat Y., Muratore M.F., Torres A.F., Martayan C. <Astron. Astrophys. 501, 297 (2009)> =2009A&A...501..297Z ================================================================================ ADC_Keywords: Stars, B-type ; Stars, supergiant ; Stars, diameters ; Effective temperatures Keywords: stars: early-type - stars: fundamental parameters Abstract: Effective temperatures of early-type supergiants are important to test stellar atmosphere- and internal structure-models of massive and intermediate mass objects at different evolutionary phases. However, these Teff values are more or less discrepant depending on the method used to determine them. We aim to obtain a new calibration of the Teff parameter for early-type supergiants as a function of observational quantities that are: a) highly sensitive to the ionization balance in the photosphere and its gas pressure; b) independent of the interstellar extinction; c) as much as possible model-independent. Description: In table2, we present effective temperatures and angular diameters of 217 B-type stars of all luminosity classes. The effective temperatures were determined with the bolometric-flux method and the angular diameters were calculated by fitting the observed energy distributions in the red spectral region with model atmospheres. The effective temperatures were used to calibrate the BCD spectrophotometric parameters (lambda_1_, D) given in the table, which were obtained with spectra of low resolution around the Balmer discontinuity. The BCD parameters are highly sensitive to the ionization balance in the photosphere and its gas pressure, and they are independent of the interstellar extinction. Table5 is a compilation of effective temperatures of the program stars determined by other authors.