Stellar Magnetic Fields
Magnetic fields play critical roles in the heating of stellar
chromospheres and coronae and the acceleration of stellar winds. The
stuctures seen in the solar chromosphere likely have analogs in cool
stars with convective zones and magnetic fields. Stellar magnetic
fields can be measured by the Zeeman spliting and broadening of
spectral lines and large-scale magnetic structures on stars can be
images using Zeeman Doppler imaging techniques.
Research Objectives:
- Review and critique the observational techniques presently used
for infering magnetic fields on stars.
- Correlate magnetic field strengths and fluxes with observed
emission in spectral lines formed in stellar chromospheres and coronae.
Important Results and Discoveries:
- Wrote several review papers and book chapters describing how
stellar magnetic fields are measured and the results of these
measurements.
- Obtained the first magnetic field measurements of M stars from
the Zeeman spliting of infrared absorption lines.
- Measured the gyrosynchrotron radio emission of a large number of chemically
peculiar Ae and Be stars and compared the emission with magnetic
field measurements.
Papers published in refereed journals since 2000:
- Bailey, J.D., Grunhut, J., Linsky, J.L. et al.: 2012, "An
analysis of the rapidly rotating Bp star HD 133880", Monthly Notices
Royal Astronomical Society, 423, 328
- Leto, G., Pagano, I., Linsky, J.L., et al.: 2000, "VLA
observations of dMe stars", Astronomy and Astrophysics, 359, 1035L
Review Papers and coinference papers since 2000:
- Linsky, J.L.: 2019, "Host Stars and their Effects on Exoplanet
Atmospheres", book published by Springer
- Linsky, J.L. and Scholler, M.: 2015, "Observations of strong
magnetic fields in nondegenerate stars", Space Science Reviews, 191,
27
- Linsky, J.L.: 2012, "Activity of late-type stars: causes and
photometric effects", in Transiting Planets, Vibrating Stars and
their Connection: Proceedings of the second CoRoT Symposium, ed. A
Baglin et al.
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