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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 (lambda1, D) parameters into Teff. 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 (lambda1, 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. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 77 217 Effective temperatures and angular diameters table5.dat 55 217 Compilation of effective temperatures of the program stars
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HD HD number 9- 18 A10 --- MK MK Spectral Type-Luminosity Class (1) 20- 23 F4.1 0.1nm lam1 BCD parameter λ1-3700 26- 30 F5.3 --- D BCD Balmer discontinuity 33- 37 F5.3 mag E(B-V) ISM extinction; color excess (UBV photom.) 40- 44 I5 K Teff Effective temperature (bolom.-flux method) 47- 50 I4 K e_Teff Error of the Teff 53- 57 F5.3 mas theta Angular diameter (milli-arc-seconds) 60- 64 F5.3 mas e_theta Error of theta 67- 70 F4.2 --- gamma Far-UV flux-filling factor (see paper) 73- 77 I5 K TeffD Effective temperature read in the (λ1,D) calibration
Note (1): The notation > SpT/LC means that the spectral type is cooler than the indicated one.
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HD HD number 9- 13 I5 K Teffb Effective temperature (bolom.-flux method) 16- 20 I5 K Teff1 ?=- Effective temperature from Gulati et al. 1989A&AS...80...73G, Castelli 1991A&A...251..106C 23- 27 I5 K Teff2 ?=- Effective temperature from Underhill et al. 1979MNRAS.189..601U, Code et al. 1976ApJ...203..417C, Malagnini et al. 1986A&A...162..140M 30- 34 I5 K Teff3 ?=- Effective temperature from Remie & Lamers 1982A&A...105...85R 37- 41 I5 K Teff4 ?=- Effective temperature from Morossi & Malagnini 1985A&AS...60..365M, Malagnini et al. 1983A&A...128..375M, Malagnini & Morossi 1990A&AS...85.1015M 44- 48 I5 K Teff5 ?=- Effective temperature from McErlean et al. 1999A&A...349..553M, Adelman et al. 2002A&A...392.1031A 51- 55 I5 K Teff6 ?=- Effective temperature from Searle et al. 2008A&A...481..777S, Markova & Puls 2008A&A...478..823M, Crowther et al. 2006A&A...446..279C
Acknowledgements: Jean Zorec, zorec(at)
(End) Jean Zorec [IAP, CNRS-UMPC, Paris] Patricia Vannier [CDS] 17-Jun-2009
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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