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Title: TURBULENT PAIR DISPERSION OF PHOTOSPHERIC BRIGHT POINTS

Abstract

Observations of solar granulation obtained with the New Solar Telescope of Big Bear Solar Observatory are used to study the turbulent pair dispersion of photospheric bright points in a quiet-Sun area, a coronal hole, and an active region plage. In all the three magnetic environments, it is found that the pair mean-squared separation {Delta}{sup 2}(t) follows a power-law timescaling {Delta}{sup 2}(t) {approx} t {sup {eta}} in the range 10 s {approx}< t {approx}< 400 s. The power-law index is found to be {eta} {approx_equal} 1.5 for all the three investigated regions. It is shown that these results can be explained in the same framework as the classical Batchelor theory, under the hypothesis that the observed range of timescales corresponds to a non-asymptotic regime in which the photospheric bright points keep the memory of their initial separations.

Authors:
; ; ;  [1]; ; ;  [2]
  1. Dipartimento di Fisica, Universita della Calabria, Ponte P. Bucci 31/C, I-87036 Rende (Italy)
  2. Big Bear Solar Observatory, 40386 North Shore Lane, Big Bear City, CA 92314 (United States)
Publication Date:
OSTI Identifier:
22078457
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal Letters
Additional Journal Information:
Journal Volume: 759; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 2041-8205
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASYMPTOTIC SOLUTIONS; BRIGHTNESS; MAGNETIC FIELDS; PHOTOSPHERE; PLAGES; SOLAR GRANULATION; SUN; TELESCOPES; TURBULENCE

Citation Formats

Lepreti, F., Carbone, V., Capparelli, V., Vecchio, A., Abramenko, V. I., Yurchyshyn, V., and Goode, P. R. TURBULENT PAIR DISPERSION OF PHOTOSPHERIC BRIGHT POINTS. United States: N. p., 2012. Web. doi:10.1088/2041-8205/759/1/L17.
Lepreti, F., Carbone, V., Capparelli, V., Vecchio, A., Abramenko, V. I., Yurchyshyn, V., & Goode, P. R. TURBULENT PAIR DISPERSION OF PHOTOSPHERIC BRIGHT POINTS. United States. doi:10.1088/2041-8205/759/1/L17.
Lepreti, F., Carbone, V., Capparelli, V., Vecchio, A., Abramenko, V. I., Yurchyshyn, V., and Goode, P. R. Thu . "TURBULENT PAIR DISPERSION OF PHOTOSPHERIC BRIGHT POINTS". United States. doi:10.1088/2041-8205/759/1/L17.
@article{osti_22078457,
title = {TURBULENT PAIR DISPERSION OF PHOTOSPHERIC BRIGHT POINTS},
author = {Lepreti, F. and Carbone, V. and Capparelli, V. and Vecchio, A. and Abramenko, V. I. and Yurchyshyn, V. and Goode, P. R.},
abstractNote = {Observations of solar granulation obtained with the New Solar Telescope of Big Bear Solar Observatory are used to study the turbulent pair dispersion of photospheric bright points in a quiet-Sun area, a coronal hole, and an active region plage. In all the three magnetic environments, it is found that the pair mean-squared separation {Delta}{sup 2}(t) follows a power-law timescaling {Delta}{sup 2}(t) {approx} t {sup {eta}} in the range 10 s {approx}< t {approx}< 400 s. The power-law index is found to be {eta} {approx_equal} 1.5 for all the three investigated regions. It is shown that these results can be explained in the same framework as the classical Batchelor theory, under the hypothesis that the observed range of timescales corresponds to a non-asymptotic regime in which the photospheric bright points keep the memory of their initial separations.},
doi = {10.1088/2041-8205/759/1/L17},
journal = {Astrophysical Journal Letters},
issn = {2041-8205},
number = 1,
volume = 759,
place = {United States},
year = {2012},
month = {11}
}