Evolution of global magnetic fields in main sequence A and B stars

Autor(en)

John Darlington Landstreet, Stefano Bagnulo, Vincenzo Andretta, Luca Fossati, Elena Mason, Jessie Silaj, Gregg A. Wade

Abstrakt

The (presumably fossil) magnetic fields in magnetic Ap stars are expected to evolve as the stars pass through the main sequence. Virtually no observational evidence currently constrains this process, because ages of field Ap stars cannot be determined accurately at present. To provide data about field evolution as a function of age, we are studying the fields of Ap stars in clusters. It is found that the fields, and probably the emergent magnetic flux, decline with increasing age for Ap stars in the range of 2 - 5 Mo..

Organisation(en)

Institut für Astrophysik

Externe Organisation(en)

University of Western Ontario, European Southern Observatory (Germany), INAF-Osservatorio Astronomico di Capodimonte, European Southern Observatory (Chile), Polish Academy of Sciences (PAS)

Journal

Contributions of the Astronomical Observatory Skalnaté Pleso

Band

38

Seiten

391-396

Anzahl der Seiten

6

ISSN

1335-1842

Publikationsdatum

2008

ÖFOS 2012

1030 Physik, Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/85ca2cc6-4608-4644-bb31-38bf80263c66