A Catalog of Magnetic Stars.
Abstract
This is a catalog of magnetic stars with a compilation of numerous observations. The analysis and discussion of the results will be taken up in a later paper. The observations have been made over a period of 11 years with the 100-inch and 200-inch telescopes, using an analyzer for the Zeeman effect. Table 1 lists repeated observations of 89 sharp-line stars. Ma etic polarity, field strength, and velocity are tabulated. Notes on spectral peculiarities and line widts are given. Table 2 lists 66 stars that probably, but not definitely, show the Zeeman effect. Table 3 consists of 61 sharp-line stars not showing evidence of a coherent magnetic field. Table 4 is a collection of 122 stars with lines too broad to permit measurement. Of the magnetic stars in Table 1, one is a cluster-type variable, 1 is a subdwarf, 2 are of type S, 3 are M giants, 7 are "metallic4ine" objects, and 70 are A-type stars with sharp or ultra-sharp lines. Stellar magnetic fields are therefore probably ubiquitous. All stellar magnetic fields appear to be variable. Of the A-type stars sufficiently observed, S are regnlar magnetic variables having periods near 1 week, very large and nearly uniform magnetic amplitude, and nearly symmetrical reversal of polarity; about 22 are irregnlar variables showing reversal of polarity; and about 15 are irregnlar variables showing always the same polarity. The irregnlar variations prove that large-scale intrinsic hydromagnetic fluctuations occur in the photospheric layers.
- Publication:
-
The Astrophysical Journal Supplement Series
- Pub Date:
- January 1958
- DOI:
- 10.1086/190035
- Bibcode:
- 1958ApJS....3..141B