Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...263..203c&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 263, no. 1-2, p. 203-207.
Astronomy and Astrophysics
Astrophysics
6
Magnetic Stars, Near Infrared Radiation, Peculiar Stars, Stellar Radiation, Light Curve, Stellar Atmospheres, Stellar Magnetic Fields, Ubv Spectra
Scientific paper
The magnetic chemically peculiar star HD 125248 has been found to be variable in the near-infrared at 1.25, 1.6, and 2.2 microns. The infrared variation occurs within the same period as the visible light, spectrum, and magnetic field variations. The infrared light curves are all in phase with each other and their amplitude, although smaller than in the visible, is nearly the same in all three filters. Using our uvby observations and those available in the literature, we have also found the best value of the period to be: P = 9.29571 (+/- 0.00018) d. From the analysis of the phase relations among the near infrared light curves, the visible ones and the magnetic field variation of HD 125248, we have found that the magnetic field extrema do coincide in time with infrared light extrema. This result is discussed in terms of the possible influence of the magnetic pressure term on the hydrostatic equilibrium of the upper atmosphere.
Catalano F. A.
Kroll Reinhold
Leone Francesco
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