Approaches for studying AP and AM stars at larger distances
Abstract
The maximum distance at which Ap and Am stars can be studied is determined by aspects of spectroscopic technology, mainly in the area of Zeeman spectroscopy. The differences between Ap and Am stars are considered, taking into account the diffusion theory of Michaud (1970) and the magnetic collection theory of Havnes and Conti (1971). It is indicated that a study of Ap stars could possibly be used to obtain information concerning variations in the characteristics of the interstellar medium. An improvement of the Zeeman techniques for such studies is considered. Attention is given to an approach used by Bidelman and Macconnell (1973), contributions of photoelectric photometry, and the methods of simultaneous photometry.
- Publication:
-
Optical Observation Programs Concerning Galactic Structure and Dynamics
- Pub Date:
- 1975
- Bibcode:
- 1975oopg.meet..253M
- Keywords:
-
- A Stars;
- Astronomical Spectroscopy;
- Electrophotometers;
- Stellar Spectrophotometry;
- Absorption Spectra;
- Optical Measurement;
- Spectrum Analysis;
- Telescopes;
- Zeeman Effect;
- Astronomy