Results 251 to 260 of about 66,681 (291)
Some of the next articles are maybe not open access.
Magnetic fields and stellar oscillations
2019Stars are fluid bodies in which pressure, buoyancy, rotation and magnetism provide the restoring forces for wave propagation. Constructive interference of these waves generates global modes of oscillation. With sufficiently precise photometry, stellar oscillations can be detected through the periodic variations they induce in a star's brightness ...
openaire +1 more source
Magnetic fields in young stellar objects
2014 XXXIth URSI General Assembly and Scientific Symposium (URSI GASS), 2014The formation of stars and planets is accompanied not only by inflows of matter, as one might expect, but also by outflows. These outflows take the form of supersonic and highly collimated jets that can stretch for several light years and extend even beyond the parent molecular cloud.
openaire +1 more source
Magnetic Fields and Stellar Surface Structures
2006We discuss the use of high-resolution spectroscopy for studying inhomogeneities on stellar surfaces. Examples of such inhomogeneities include chemical and temperature spots, pulsation waves and magnetic fields. Presence of surface structures reflects important physical processes occurring in much deeper layers than can be observed and, therefore, they ...
openaire +1 more source
Magnetic Fields–the Source of Stellar Activity
2019These pithy quotes highlight the main reasons for discussing stellar magnetic fields in the context of exoplanet atmospheres and possible habitability.
openaire +1 more source
Stellar Magnetic Fields: Measurements and Diagnostics
1988Magnetic fields are central to our understanding of surface activity in cool stars. This paper reviews recent progresses in the measurements of photospheric magnetic fields and stresses some of the main difficulties in the analysis of magnetic field observations.
openaire +1 more source
Stellar Magnetic Fields, Origin and Structure
1988The accumulating observational data point clearly to a basic picture of stellar activity dominated by magnetic fields maintained by dynamo action, dependent on the star’s rotation. There is some tentative evidence that in the pre-main sequence phase there is also some primeval magnetic flux, which may be dynamically significant for the T Tauri ...
openaire +1 more source