Photosphere-Chromosphere Connection as Derived from Nst Observations

Details Photosphere-Chromosphere Connection as Derived from Nst Observations Photosphere-Chromosphere Connection as Derived from Nst Observations

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsh31c1807y&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SH31C-1807

Astronomy and Astrophysics

Astrophysics

[7507] Solar Physics, Astrophysics, And Astronomy / Chromosphere, [7529] Solar Physics, Astrophysics, And Astronomy / Photosphere

Scientific paper

Largest ground-based new solar telescope (NST) of Big Bear Solar Observatory allows us to simultaneously observe photospheric granulation with luxurious filigree of bright points (BPs) and low/middle chromosphere in H- alpha spectral line. Excellent climate conditions of Big Bear Valley, augmented with an adaptive optics system and speckle-reconstruction applications produce diffraction limited images. Recent observations (July- August 2010) showed that BPs visible in the photosphere with the TiO filter (centered at a wavelength of 705.7 nm) are co-spatial with the BPs visible in the blue wind of H-alpha line. As evidenced from these data, the H-alpha BPs, in turn, are frequently at origin of small-scale chromospheric jets. These jets are visible at all scales down to the smallest resolved features. As long as photospheric BPs are co-spatial with the magnetic elements, one might conclude that photospheric magnetic fields are relevant to the chromospheric jet formation. NST Ha-0.13nm image acquired on June 28, 2010. The dark features are upward directed flows that have velocities up to 60km/sec seen against the background of photospheric granulation with inclusions of BPs. The corresponding movie shows reveals significant dynamics associated with these rosette like structures stemming from clusters of BPs.

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