Asymmetries and shifts of the solar K I 7699 A line and possible evidence for gravity waves in the quiet photosphere

Details Asymmetries and shifts of the solar K I 7699 A line and possible evidence for gravity waves in the quiet photosphere Asymmetries and shifts of the solar K I 7699 A line and possible evidence for gravity waves in the quiet photosphere

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...244..492b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 244, no. 2, April 1991, p. 492-500. DGICYT-supported research.

Astronomy and Astrophysics

Astrophysics

13

Gravity Waves, K Lines, Line Spectra, Photosphere, Solar Granulation, Solar Spectra, Astronomical Spectroscopy, Chromosphere, Dynamic Models, Local Thermodynamic Equilibrium, Solar Limb

Scientific paper

A computing code has been developed to simulate the center-to-limb variation (CLV) of the bisector's shape, and absolute wavelength shift of the core in strong photospheric lines. Observational results concerning these aspects are also reported for the K I 7699 line. In the numerical simulation, granulation is represented, as a first approximation, by means of the granular model by Nelson (1978). It appears that granulation alone does not reproduce the observations and thus some modification has to be implemented in the dynamical model employed. A good match to the observed CLV of the wavelength shift of the line core is achieved by adding two 8-min period gravity waves with horizontal wavelength of the granular scale, the only difference between them being the sign of their horizontal wavenumber. Changes in the phase difference between the oscillating parameters have a decisive influence on the result.

Affiliated with

Also associated with

No associations

Rating

Asymmetries and shifts of the solar K I 7699 A line and possible evidence for gravity waves in the quiet photosphere 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 Asymmetries and shifts of the solar K I 7699 A line and possible evidence for gravity waves in the quiet photosphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Asymmetries and shifts of the solar K I 7699 A line and possible evidence for gravity waves in the quiet photosphere will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1787296