Analysis of a spatially deconvolved solar pore

Abstract

Solar pores are active regions with large magnetic field strengths and apparent simple magnetic configurations. Their properties resemble the ones found for the sunspot umbra although pores do not show penumbra. Therefore, solar pores present themselves as an intriguing phenomenon that is not completely understood. We examine in this work a solar pore observed with Hinode/SP using two state of the art techniques. The first one is the spatial deconvolution of the spectropolarimetric data that allows removing the stray light contamination induced by the spatial point spread function of the telescope. The second one is the inversion of the Stokes profiles assuming local thermodynamic equilibrium that let us to infer the atmospheric physical parameters. After applying these techniques, we found that the spatial deconvolution method does not introduce artefacts, even at the edges of the magnetic structure, where large horizontal gradients are detected on the atmospheric parameters. Moreover, we also describe the physical properties of the magnetic structure at different heights finding that, in the inner part of the solar pore, the temperature is lower than outside, the magnetic field strength is larger than 2 kG and unipolar, and the LOS velocity is almost null. At neighbouring pixels, we found low magnetic field strengths of same polarity and strong downward motions that only occur at the low photosphere, below the continuum optical depth $\log \tau =-1$. Finally, we studied the spatial relation between different atmospheric parameters at different heights corroborating the physical properties described before.

arXiv comment11 pages, 9 figures, main journal

References in corpus (8)

• The Solar Optical Telescope for the Hinode Mission: An Overview
• Magnetic Structure of Sunspots
• Returning magnetic flux in sunspot penumbrae
• Dynamics of the solar atmosphere above a pore with a light bridge
• Spatial deconvolution of spectropolarimetric data: an application to quiet Sun magnetic elements
• The photospheric environment of a solar pore with light bridge
• Analysis of spatially deconvolved polar faculae
• Analysis of horizontal flows in the solar granulation

Cited by in corpus (8)

• The second flight of the SUNRISE balloon-borne solar observatory: overview of instrument updates, the flight, the data and first results
• A method for global inversion of multi-resolution solar data
• IRIS observations of magnetic interactions in the solar atmosphere between pre-existing and emerging magnetic fields. I. Overall evolution
• Properties of the Umbral Filament Observed in Active Region NOAA 12529
• Penumbral decay observed in active region NOAA 12585
• Does H$\alpha$ Stokes~$V$ profiles probe the chromospheric magnetic field? An observational perspective
• High-resolution observations of two pores with the integral field unit (IFU) of the GREGOR Infrared Spectrograph (GRIS)
• Decay of a photospheric transient filament at the boundary of a pore and the chromospheric response