Plasma properties and Stokes profiles during the lifetime of a photospheric magnetic bright point

@article{Hewitt2014PlasmaPA,
  title={Plasma properties and Stokes profiles during the lifetime of a photospheric magnetic bright point},
  author={Rebecca L. Hewitt and Sergiy Shelyag and M. Mathioudakis and Francis Keenan},
  journal={Astronomy and Astrophysics},
  year={2014},
  volume={565},
  pages={1-13}
}
Aims: In this paper we aim to investigate the evolution of plasma properties and Stokes parameters in photospheric magnetic bright points using 3D magneto-hydrodynamical simulations and radiative diagnostics of solar granulation. Methods: Simulated time-dependent radiation parameters and plasma properties were investigated throughout the evolution of a bright point. Synthetic Stokes profiles for the FeI 630.25 nm line were calculated, which also allowed the evolution of the Stokes-I line… 

Figures from this paper

High-resolution spectropolarimetric observations of the temporal evolution of magnetic fields in photospheric bright points
Context. Magnetic bright points (MBPs) are dynamic, small-scale magnetic elements often found with field strengths of the order of a kilogauss within intergranular lanes in the photosphere. Aims.
Ultra‐High‐Resolution Observations of MHD Waves in Photospheric Magnetic Structures
Here we review the recent progress made in the detection, examination, characterisation and interpretation of oscillations manifesting in small-scale magnetic elements in the solar photosphere. This
Propagation of Torsional Alfvén Pulses in Zero-beta Flux Tubes
In this study, we investigate analytically the generation of mass flux due to a torsional Alfvén pulse. We derive that the presence of torsional Alfvén waves, which have been observed in, e.g.,
The Formation and Disintegration of Magnetic Bright Points Observed by Sunrise/IMaX
The evolution of the physical parameters of magnetic bright points (MBPs) located in the quiet Sun (mainly in the interwork) during their lifetime is studied. First, we concentrate on the detailed
The influence of NLTE effects in Fe I lines on an inverted atmosphere
Context. Ultraviolet overionisation of iron atoms in the solar atmosphere leads to deviations in their level populations based on Saha-Boltzmann statistics. This causes their line profiles to form in
Challenges and Advances in Modeling of the Solar Atmosphere: A White Paper of Findings and Recommendations
The next decade will be an exciting period for solar astrophysics, as new groundand space-based instrumentation will provide unprecedented observations of the solar atmosphere and heliosphere. The
Studies of Isolated and Non-isolated Photospheric Bright Points in an Active Region Observed by the New Vacuum Solar Telescope
Properties of photospheric bright points (BPs) near an active region have been studied in TiO lambda 7058 angstrom images observed by the New Vacuum Solar Telescope of the Yunnan Observatories. We
Ellerman Bombs with Jets: Cause and Effect
Ellerman Bombs (EBs) are thought to arise as a result of photospheric magnetic reconnection. We use data from the Swedish 1 m Solar Telescope to study EB events on the solar disk and at the limb.
Open and Closed Magnetic Configurations of Twisted Flux Tubes
We construct two classes of magnetohydrostatic (MHS) equilibria for an axisymmetric vertical flux tube spanning from the photosphere to the lower part of the transition region within a realistic
...
1
2
...

References

SHOWING 1-10 OF 43 REFERENCES
Stokes diagnostics of simulated solar magneto-convection
We present results of synthetic spectro-polarimetric diagnostics of radiative MHD simulations of solar surface convection with magnetic fields. Stokes profiles of Zeeman-sensitive lines of neutral
A photospheric bright point model
Aims. A magneto-hydrostatic model is constructed with spectropolarimetric properties close to those of solar photospheric magnetic bright points. Methods. Results of solar radiative
IMAGING SPECTROPOLARIMETRY WITH IBIS: EVOLUTION OF BRIGHT POINTS IN THE QUIET SUN
We present the results from first spectropolarimetric observations of the solar photosphere acquired at the Dunn Solar Telescope with the Interferometric Bidimensional Spectrometer. Full Stokes
The velocity distribution of solar photospheric magnetic bright points
We use high spatial resolution observations and numerical simulations to study the velocity distribution of solar photospheric magnetic bright points. The observations were obtained with the Rapid
Vorticity in the solar photosphere
Aims We use magnetic and non-magnetic 3D numerical simulations of solar granulation and G-band radiative diagnostics from the resulting models to analyse the generation of small-scale vortex motions
Propagating Wave Phenomena Detected in Observations and Simulations of the Lower Solar Atmosphere
We present high-cadence observations and simulations of the solar photosphere, obtained using the Rapid Oscillations in the Solar Atmosphere imaging system and the MuRAM magnetohydrodynamic (MHD)
G-band spectral synthesis and diagnostics of simulated solar magneto-convection
Realistic simulations of radiative magneto-convection in the solar (sub)photosphere are used for a spectral synthesis of Fraunhofer's G band, which is dominated by spectral lines from the CH
Statistics of convective collapse events in the photosphere and chromosphere observed with the Hinode SOT
Convective collapse, a theoretically predicted process that intensifies existing weak magnetic fields in the solar atmosphere, was first directly observed in a single event by Nagata et al. (2008,
Evolution of solar magnetic tubes from observations of Stokes parameters
Basic scenarios and mechanisms for the formation and decay of small-scale magnetic elements and their manifestation in synthesized Stokes profiles of the Fe I 15648.5 Å infrared line are considered
Observation of Convective Collapse and Upward-moving Shocks in the Quiet Sun
We present spectropolarimetric evidence of convective collapse and destruction of magnetic flux by upward-moving fronts in the quiet Sun. The observational material consists of time series of the
...
1
2
3
4
5
...