Characterization of horizontal flows around solar pores from high-resolution time series of images

Abstract

Though there is increasing evidence linking the moat flow and the Evershed flow along the penumbral filaments, there is not a clear consensus regarding the existence of a moat flow around umbral cores and pores, and the debate is still open. Solar pores appear to be a suitable scenario to test the moat-penumbra relation as evidencing the direct interaction between the umbra and the convective plasma in the surrounding photosphere, without any intermediate structure in between. The present work studies solar pores based on high resolution ground-based and satellite observations. Local correlation tracking techniques have been applied to different-duration time series to analyze the horizontal flows around several solar pores. Our results establish that the flows calculated from different solar pore observations are coherent among each other and show the determinant and overall influence of exploding events in the granulation around the pores. We do not find any sign of moat-like flows surrounding solar pores but a clearly defined region of inflows surrounding them. The connection between moat flows and flows associated to penumbral filaments is hereby reinforced by this work.

10 pages, 10 figures, Accepted for publication in Astronomy and Astrophysics.

References in corpus (5)

• The Solar Optical Telescope for the Hinode Mission: An Overview
• Flow Field Evolution of a Decaying Sunspot
• Moat flow in the vicinity of sunspots for various penumbral configurations
• On the Moat-Penumbra Relation
• The photospheric environment of a solar pore with light bridge

Cited by in corpus (18)

• Numerical simulations of active region scale flux emergence: From spot formation to decay
• Subsurface magnetic field and flow structure of simulated sunspots
• Numerical simulations of sunspot decay: On the penumbra -- Evershed flow -- moat flow connection
• Small-scale chromospheric jets above a sunspot light bridge
• Horizontal flow fields observed in Hinode G-band images II. Flow fields in the final stages of sunspot decay
• Local Helioseismology of Sunspots: Current Status and Perspectives (Invited Review)
• Analysis of a Fragmenting Sunspot using Hinode Observations
• Horizontal flow fields in and around a small active region-- The transition period between flux emergence and decay
• Horizontal flow fields observed in Hinode G-band images IV. Statistical properties of the dynamical environment around pores
• Evolution of small-scale magnetic elements in the vicinity of granular-size swirl convective motions
• Magnetic topology of a naked sunspot: Is it really naked?
• On the Magnetic Nature of an Exploding Granule as Revealed by Sunrise/IMaX
• Plasma flows and magnetic field interplay during the formation of a pore
• Local helioseismology of sunspot regions: comparison of ring-diagram and time-distance results
• Evolution of the flow field in decaying active regions II. Converging flows at the periphery of naked spots
• Exploring magnetic field properties at the boundary of solar pores: A comparative study based on SDO-HMI observations
• 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