Hostname: page-component-848d4c4894-pftt2 Total loading time: 0 Render date: 2024-05-21T22:05:02.026Z Has data issue: false hasContentIssue false
  • English
  • Français

A Method for Calibrating, in Absolute Flux Units, Ca II H Profiles of Late Type Stars Observed at ESO

Published online by Cambridge University Press:  19 July 2016

F. Castelli ,
P. Gouttebroze ,
J. Beckman ,
L. Crivellari  and
B. Foing
F. Castelli
Affiliation:
Osservatorio Astronomico di Trieste Via Tiepolo 11-I34131 Trieste-Italy
P. Gouttebroze
Affiliation:
Laboratoire de Physique Stellaire et Planetaire BP 10,F-91376 Verriers-le-Buisson-France
J. Beckman
Affiliation:
Instituto de Astrophysica de Canarias La Laguna-Tenerife-Spain
L. Crivellari
Affiliation:
Osservatorio Astronomico di Trieste Via Tiepolo 11-I34131 Trieste-Italy
B. Foing
Affiliation:
Laboratoire de Physique Stellaire et Planetaire BP 10,F-91376 Verriers-le-Buisson-France

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

In this paper we have applied to the Sun a method for calibrating, in absolute flux units, Ca II H profiles of late-type stars. After comparing, in the region 3948-3882 A, an LTE synthetic spectrum with the data of the solar flux Atlas by Kurucz et al. (1984), we have defined the wavelength ranges where observations agree with computations, based on specific radiative equilibrium models and collisional broadening parameters. By fitting in these regions the spectrum of the moon observed at ESO with the corresponding synthetic spectrum, we derived a calibration factor that enables us to calibrate, in absolute flux units, the whole observed range.

Type
III. Stars
Information
Symposium - International Astronomical Union , Volume 132: The Impact of Veryhigh S/N Spectroscopy on Stellar Physics , 1988 , pp. 153 - 161
Copyright
Copyright © Kluwer 1988 

References

Ayres, T.R.: 1975, Astrophys. J. 201, 799.CrossRefGoogle Scholar
Ayres, T.R., Linsky, J.L., Rodgers, A.W., and Kurucz, R.L.: 1976, Astrophys. J. 210, 199.Google Scholar
Beckers, J.M., Bridges, C.A., and Gilliam, L.B.: 1976, ‘A High Resolution Spectral Atlas of the Solar Irradiance From 380 to 700 Nanometers’, Sacramento Peak Obs. Project No. 7649.Google Scholar
Bell, R.A., Eriksson, K., Gustafsson, B, and Nordlund, A.: 1976, Astron. Astrophys. Suppl. 23, 37.Google Scholar
Catalano, S.: 1979, Astron. Astrophys. 80, 317.Google Scholar
Crivellari, L., Beckman, J.E., Foing, B.H., and Vladilo, G.: 1987, Astron. Astrophys. 174, 127.Google Scholar
Deridder, G., and Van Rensbergen, W.: 1976, Astron. Astrophys. Suppl. 23, 147.Google Scholar
Duncan, D.K.: 1981, Astrophys. J. 248, 651.CrossRefGoogle Scholar
Lambert, D.L., and Warner, B.: 1968, Mon. Not. R. Astr. Soc. 140, 197.Google Scholar
Linsky, J.L., Worden, S.P., McClintock, W., and Robertson, R.M.: 1979, Astrophys. J. Suppl. 41, 47.Google Scholar
Kurucz, R.L.: 1986, private comunication.Google Scholar
Kurucz, R.L., and Avrett, E.: 1981, SAO Sp. Rep. 391.Google Scholar
Kurucz, R.L., Furenlid, I., Brault, J., Testerman, L.: 1984, ‘Solar Flux Atlas from 296 to 1300 nm’, National Solar Observatory, Sunspot, New Mexico.Google Scholar
Shine, R.A., and Linsky, J.L. 1974, Solar Physics 39, 49.Google Scholar