Bibcode
Alonso, A.; Arribas, S.; Martinez-Roger, C.
Bibliographical reference
Astronomy and Astrophysics (ISSN 0004-6361), vol. 282, no. 2, p. 684-698
Advertised on:
2
1994
Citations
48
Refereed citations
43
Description
A new semi-empirical method to derive the absolute flux calibration in
the near infrared (J,K,L and L' bands) is proposed. The method consists
of the application of the InfraRed Flux Method (IRFM) to a selected
sample of stars with accurate direst measurements of their angular
diameters. The absolute fluxes in each band are obtained minimizing the
difference (theta(IRFM) - theta(direct)). To limit the error in the
determination of the infrared monochromatic fluxes, required to apply
the IRFM, a program of broad band JHKL' photometric observations has
been carried out for most of the northern stars in the sample. When
applying separately the method to cool and hot stars, the obtained
calibrations differ by about 8% in all the photometric bands. This
implies that the fundamental effective temperatures (derived from direct
measurements of the angular diameters) for cool and hot stars, and those
determined from the IRFM are not on the same scale, regardless of the
infrared absolute calibration adopted.