CP stars
Hot stars in galaxies
Light pollution
Past position
My links
Outreach activities
Something about me
My photos collection
Site Map

CP stars


Most of my scientific activity concerns the study of the Chemically Peculiar (CP) stars of the main sequence.
The main characteristics of these stars, whose spectral type is between B and A, are:
- spectral lines with strength not consistent with the stellar effective
- large scale organized magnetic fields inferred via the Zeeman effect.
  Typically the field strength is of the order of 103-104 Gauss;
- spectral, photometric and magnetic variability with a single period;
These features could be explained by using the oblique rotator model proposed by Babcock and Stibbs. The model consists of:
- mainly dipolar magnetic field, whose axis is tilted with respect to the
   rotational one
- non solar chemical abundances,
- non homogeneous distribution of chemical elements on the stellar surface.
In such a scenario the period of the observed variability is the stellar rotational period.

Spectral variabilty Abundances Binary systems Polarimetry