Supersonic Evershed flow outside Sunspots (2009)
Pillet, V. Martinez, Katsukawa, Y., Puschmann, K. G., Cobo, B. Ruiz
We report on the discovery of mostly horizontal field channels just outside sunspot penumbrae (in the so-called `moat' region) that are seen to sustain supersonic flows (line-of-sight component of 6...
Nishizuka, N., Shimizu, M., Nakamura, T., Otsuji, K., Okamoto, T. J., Katsukawa, Y., ...
Hinode discovered a beautiful giant jet with both cool and hot components at the solar limb on 2007 February 9. Simultaneous observations by the Hinode SOT, XRT, and TRACE 195 satellites revealed...
The properties of penumbral microjets inclination (2008)
We investigate the dependence of penumbral microjets inclination on the position within penumbra. The high cadence observations taken on 10 November 2006 with the Hinode satellite through the...
Magnetic Landscape of Sun's Polar Region (2008)
Tsuneta, S., Ichimoto, K., Katsukawa, Y., Lites, B. W., Matsuzaki, K., Nagata, S., ...
We present the magnetic landscape of the polar region of the Sun that is unprecedented in terms of high spatial resolution, large field of view, and polarimetric precision. These observations were...
Disintegration of Magnetic Flux in Decaying Sunspots as Observed with the Hinode SOT (2008)
Kubo, M., Lites, B. W., Ichimoto, K., Shimizu, T., Suematsu, Y., Katsukawa, Y., ...
Continuous observations of sunspot penumbrae with the Solar Optical Telescope aboard \textit{Hinode} clearly show that the outer boundary of the penumbra fluctuates around its averaged position. The...
The intensity contrast of solar granulation: comparing Hinode SP results with MHD simulations (2008)
Danilovic, S., Gandorfer, A., Lagg, A., Schüssler, M., Solanki, S. K., Vögler, A., ...
The contrast of granulation is an important quantity characterizing solar surface convection. We compare the intensity contrast at 630 nm, observed using the Spectro-Polarimeter (SP) aboard the...
On-orbit Performance of the Solar Optical Telescope aboard Hinode (2008)
Ichimoto, K., Katsukawa, Y., Tarbell, T., Shine, R. A., Hoffmann, C., Berger, T., ...
On-orbit performance of the Solar Optical Telescope (SOT) aboard Hinode is described with some attentions on its unpredicted aspects. In general, SOT revealed an excellent performance and has been...
Frequent Occurrence of High-speed Local Mass Downflows on the Solar Surface (2008)
Shimizu, T., Lites, B. W., Katsukawa, Y., Ichimoto, K., Suematsu, Y., Tsuneta, S., ...
We report on new spectro-polarimetric measurements with simultaneous filter imaging observation, revealing the frequent appearance of polarization signals indicating high-speed, probably supersonic,...
Relationships between magnetic foot points and G-band bright structures (2008)
Ishikawa, R., Tsuneta, S., Kitakoshi, Y., Katsukawa, Y., Bonet, J. A., Domínguez, S. Vargas, ...
Magnetic elements are thought to be described by flux tube models, and are well reproduced by MHD simulations. However, these simulations are only partially constrained by observations. We...
Transient horizontal magnetic fields in solar plage regions (2008)
Ishikawa, R., Tsuneta, S., Ichimoto, K., Isobe, H., Katsukawa, Y., Lites, B. W., ...
We report the discovery of isolated, small-scale emerging magnetic fields in a plage region with the Solar Optical Telescope aboard Hinode. Spectro-polarimetric observations were carried out with a...
Moat flow in the vicinity of sunspots for various penumbral configurations (2008)
Dominguez, S. Vargas, Van Der Voort, L. Rouppe, Bonet, J. A., Pillet, V. Martinez, Van Noort, M., Katsukawa, Y.
High-resolution time series of sunspots have been obtained with the Swedish 1m Solar Telescope between 2003 and 2006 at different locations on the solar disc. Proper motions in seven different active...
Coronal transverse magnetohydrodynamic waves in a solar prominence (2008)
Okamoto, T. J., Tsuneta, S., Berger, T. E., Ichimoto, K., Katsukawa, Y., Lites, B. W., ...
Solar prominences are cool 10$^4$ Kelvin plasma clouds supported in the surrounding 10$^6$ Kelvin coronal plasma by as-yet undetermined mechanisms. Observations from \emph{Hinode} show fine-scale...
The intensity contrast of solar granulation: comparing Hinode SP results with MHD simulations (2008)
Danilovic, S., Gandorfer, A., Lagg, A., Schüssler, M., Solanki, S.K., Vögler, A., ...
Context. The contrast of granulation is an important quantity characterizing solar surface convection. Aims. We compare the intensity contrast at 630 nm, observed using the Spectro-Polarimeter (SP)...
The intensity contrast of solar granulation: comparing Hinode SP results with MHD simulations (2008)
Danilovic, S., Gandorfer, A., Lagg, A., Schüssler, M., Solanki, S. K., Vögler, A., ...
Isobe, H., Kubo, M., Minoshima, T., Ichimoto, K., Katsukawa, Y., Tarbell, T. D., ...
The Solar Optical Telescope (SOT) on board Hinode satellite observed an X3.4 class flare on 2006 December 13. Typical two-ribbon structure was observed, not only in the chromospheric CaII H line but...
A Tale Of Two Spicules: The Impact of Spicules on the Magnetic Chromosphere (2007)
De Pontieu, Bart, McIntosh, Scott W., Hansteen, Viggo H., Carlsson, Mats, Schrijver, C. J., Tarbell, T. D., ...
We use high-resolution observations of the Sun in Ca II H 3968 A from the Solar Optical Telescope on Hinode to show that there are at least two types of spicules that dominate the structure of the...
Quiet Sun internetwork magnetic fields from the inversion of Hinode measurements (2007)
Suarez, D. Orozco, Rubio, L. R. Bellot, Tsuneta, S., Lites, B. W., Ichimoto, K., ...
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...
Formation Process of a Light Bridge Revealed with the Hinode Solar Optical Telescope (2007)
Katsukawa, Y., Yokoyama, T., Berger, T. E., Ichimoto, K., Kubo, M., Lites, B. W., ...
The Solar Optical Telescope (SOT) aboard HINODE successfully and continuously observed a formation process of a light bridge in a matured sunspot of the NOAA active region 10923 for several days with...
Strategy for the inversion of Hinode spectropolarimetric measurements in the quiet Sun (2007)
Suarez, D. Orozco, Rubio, L. R. Bellot, Tsuneta, S., Lites, B. W., Ichimoto, K., ...
In this paper we propose an inversion strategy for the analysis of spectropolarimetric measurements taken by {\em Hinode} in the quiet Sun. The spectropolarimeter of the Solar Optical Telescope...
Vector spectropolarimetry of dark-cored penumbral filaments with Hinode (2007)
Rubio, L. R. Bellot, Tsuneta, S., Ichimoto, K., Katsukawa, Y., Lites, B. W., Nagata, S., ...
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...
Emergence of Small-Scale Magnetic Loops in the Quiet Sun Internetwork (2007)
Centeno, R., Socas-Navarro, H., Lites, B., Kubo, M., Frank, Z., Shine, R., ...
We study the emergence of magnetic flux at very small spatial scales (less than 2 arcsec) in the quiet Sun internetwork. To this aim, a time series of spectropolarimetric maps was taken at disk...
On the Moat-Penumbra Relation (2007)
Dominguez, S. Vargas, Bonet, J. A., Pillet, V. Martinez, Katsukawa, Y., Kitakoshi, Y., Van Der Voort, L. Rouppe
Proper motions in a sunspot group with a delta-configuration and close to the solar disc center have been studied by employing local correlation tracking techniques. The analysis is based on more...
Domínguez, S. Vargas, Bonet, J. A., Pillet, V. Martinez, Katsukawa, Y.
Time series of high-resolution images of the complex active region NOAA 10786 are studied. The observations were performed in G-band (430.5 nm) and in the nearby continuum (463.3 nm), on July 9, 2005...