Spectral and polarimetric observations of the star HD 37022 (θ1 Ori C)
Abstract
HD 37022 (θ1 Ori C) is a young star of spectral type O7 V, the brightest star in the Trapezium of the Orion Nebulae (M42). It has a synchronous spectral variability in the optical, ultraviolet and X--rays regions with a period P=15.422d. For the explanation of this variability many authors suggest a magnetic rotator modulating the stellar wind. During 1996-97 we made a series of observations of θ1 Ori C at the 6 m telescope of SAO RAS, using the circular polarization analyzer and hydrogen--line magnetometer, to make sure that a magnetic field exists in this star. In this paper we publish the results of measurements of the effective magnetic field and Stokes parameters. The value of the effective magnetic field is within the measurement errors and apparently not more than 500G.
- Publication:
-
Magnetic Fields of Chemically Peculiar and Related Stars
- Pub Date:
- 2000
- Bibcode:
- 2000mfcp.proc...64K