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Quiet-Sun Internetwork Magnetic Fields from the Inversion of Hinode Measurements
Lites, B. W.; Ichimoto, K.; Bellot Rubio, L. R. +10 more
We analyze Fe I 630 nm observations of the quiet Sun at disk center taken with the spectropolarimeter of the Solar Optical Telescope aboard the Hinode satellite. A significant fraction of the scanned area, including granules, turns out to be covered by magnetic fields. We derive field strength and inclination probability density functions from a M…
Emergence of Small-Scale Magnetic Loops in the Quiet-Sun Internetwork
Kubo, M.; Ichimoto, K.; Tsuneta, S. +11 more
We study the emergence of magnetic flux at very small spatial scales (less than 2") in the quiet-Sun internetwork. To this aim, a time series of spectropolarimetric maps was taken at disk center using the instrument SP/SOT on board Hinode. The LTE inversion of the full Stokes vector measured in the Fe I 6301 and 6302 Å lines allows us to retrieve …
Nonthermal Velocities in Solar Active Regions Observed with the Extreme-Ultraviolet Imaging Spectrometer on Hinode
Young, P. R.; Mason, H. E.; Culhane, J. L. +6 more
We discuss nonthermal velocities in an active region as revealed by the Extreme-Ultraviolet Imaging Spectrometer (EIS) on the Hinode spacecraft. The velocities are derived from spectral line profiles in the extreme-ultraviolet (EUV) from a strong line of Fe XII at 195.12 Å by fitting each line profile to a Gaussian function. We compare maps of the…
Vector Spectropolarimetry of Dark-cored Penumbral Filaments with Hinode
Lites, B. W.; Ichimoto, K.; Bellot Rubio, L. R. +9 more
We present spectropolarimetric measurements of dark-cored penumbral filaments taken with Hinode at a resolution of 0.3". Our observations demonstrate that dark-cored filaments are more prominent in polarized light than in continuum intensity. Far from disk center, the Stokes profiles emerging from these structures are very asymmetric and show evid…
Quiet-Sun Magnetic Fields from Space-borne Observations: Simulating Hinode's Case
Bellot Rubio, L. R.; del Toro Iniesta, J. C.; Orozco Suárez, D.
We examine whether it is possible to derive the field strength distribution of quiet-Sun internetwork regions from very high spatial resolution polarimetric observations in the visible. In particular, we consider the case of the spectropolarimeter attached to the Solar Optical Telescope aboard Hinode. Radiative magnetoconvection simulations are us…
Observations of Dark Lanes in Umbral Fine Structure from the Hinode Solar Optical Telescope: Evidence for Magnetoconvection
Bharti, Lokesh; Joshi, Chandan; Jaaffrey, S. N. A.
An analysis of high-resolution G-band images of active region NOAA 10930 is presented. The observations were recorded with the Broadband Filter Imager (BFI) attached to the Solar Optical Telescope (SOT) on board the Hinode mission. We observed dark lanes in umbral dots up to six folds in larger ones. Formation of umbral dots from dark core penumbr…
Initial Observations of Sunspot Oscillations Excited by Solar Flare
Kosovichev, A. G.; Sekii, T.
Observations of a large solar flare on 2006 December 13 using Solar Optical Telescope (SOT) on board the Hinode spacecraft revealed high-frequency oscillations excited by the flare in the sunspot chromosphere. These oscillations are observed in the region of strong magnetic field of the sunspot umbra and may provide a new diagnostic tool for probi…
RHESSI and Hinode X-Ray Observations of a Partially Occulted Solar Flare
Krucker, Säm; Lin, R. P.; Hannah, I. G.
This Letter presents X-ray observations of a partially limb-occulted solar flare taken by the Reuven Ramaty High-Energy Solar Spectroscopic Imager and the X-ray telescope on board Hinode. Thermal emission originates from a simple loop at the western limb that rises slowly (~7 km s-1) until the flare peak time. Above 18 keV, faint nonthe…