Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007a%26a...473..937j&link_type=abstract
Astronomy and Astrophysics, Volume 473, Issue 3, October III 2007, pp.937-942
Astronomy and Astrophysics
Astrophysics
Sun: Magnetic Fields, Sun: Oscillations, Magnetohydrodynamics (Mhd), Sun: Helioseismology
Scientific paper
Context: It is known from Doppler velocity measurements that the amplitudes of solar p-modes are modulated by strong photospheric magnetic field. Aims: The aim of this paper is to investigate amplitude modulation by model surface magnetic fields. Methods: Linearised magnetohydrodynamics equations, in the absence of gravity, are used to derive the inhomogeneous wave equation which is then solved using the Born Approximation. Results: The amount of modulation depends on the plasma beta, the distance from the magnetic region and the wavenumber. It is also found that the direction of observation could also have an effect on the amount of modulation. Finally, the applicability of the findings to the observational data suggests that the modulation depends on the properties of the magnetic field region and measuring it is an un-contaminating probe for the magnetic field.
Jain Rahul
Steele Colin D. C.
No associations
LandOfFree
Amplitude modulation of solar p-modes by surface magnetic fields does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Amplitude modulation of solar p-modes by surface magnetic fields, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Amplitude modulation of solar p-modes by surface magnetic fields will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-823217