Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008a%26a...481l..29m&link_type=abstract
Astronomy and Astrophysics, Volume 481, Issue 1, 2008, pp.L29-L32
Astronomy and Astrophysics
Astrophysics
8
Sun: Photosphere, Sun: Magnetic Fields
Scientific paper
Aims: It is well known that convective motions in the photosphere are suppressed by magnetic fields. However, it has been difficult to study the interaction between convection and small magnetic features, such as G-band bright points (GBPs) or pores with polarimetric measurements, because of the available spatial resolution (~1´´). This situation is changed by the advent of the Spectro-Polarimeter (SP) aboard the Hinode satellite, which has 0.3 arcsec spatial resolution. Methods: We analyzed the pore and its surrounding region in NOAA 10940 near the disk center. We obtained the field strength and filling factor through the Milne-Eddington inversion of the Stokes profiles. We also derived the line-of-sight velocity by the shift of the line core. Using these physical parameters, we investigated the physical conditions needed to suppress the convection. Results: We found that the convection is suppressed, not by the strength of the magnetic field itself, but by high concentration of magnetic flux tubes. We also found that GBPs and pores are distinguished in terms of the filling factor (f); f ≃ 0.6 for GBPs and f=0.8-0.9 for pores.
Ichimoto Kiyoshi
Katsukawa Yukio
Morinaga Satoshi
Sakurai Takashi
Shimojo Miki
No associations
LandOfFree
Suppression of convection around small magnetic concentrations 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 Suppression of convection around small magnetic concentrations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Suppression of convection around small magnetic concentrations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1421136