Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
INVESTIGATIONS OF STELLAR CORONAE WITH Columbia Astrophysics Laboratory, Mail code 5247, 550 West 120
 

Summary: INVESTIGATIONS OF STELLAR CORONAE WITH
XMM-NEWTON
M. Audard


Columbia Astrophysics Laboratory, Mail code 5247, 550 West 120
¡£¢
Street, New York, NY 10027, USA
ABSTRACT
The XMM-Newton observatory has given a strong new impetus to the investigations of stellar coronae. It carries
high-resolution X-ray spectroscopic instruments that give access to information on the physical conditions in coronal
plasmas. Furthermore, its imaging detectors produce high-quality X-ray light curves and images with a large field of
view. I review results on stellar coronae obtained with XMM-Newton between its launch in late 1999 and the present
(late 2002). Among other topics, I discuss the elemental composition of stellar coronae and plasma electron densities
in quiescence and during flares. I present evidence for various signatures of the Neupert effect in stars, which provides
evidence of chromospheric and coronal heating by flares. Coronal structures based on eclipse mapping inferred from
light curve inversion are shown.
INTRODUCTION
Since the discovery of X-ray emission from the first coronal source other than the Sun, Capella (Catura et al., 1975),
the interpretation of physical mechanisms in stellar coronae based on X-ray data has been a rich and prosperous

  

Source: Audard, Marc - INTEGRAL Science Data Centre & Observatory of Geneva, Université de Genève

 

Collections: Physics