The height dependence of quiet-sun photospheric temperature fluctuations in observations and simulations

J. Koza; A. Kucera; J. Rybák; H. Wöhl

The height dependence of quiet-sun photospheric temperature fluctuations in observations and simulations

J. Koza, A. Kucera, J. Rybák, H. Wöhl

Dep Natuurkunde

extern

Research output: Chapter in Book/Report/Conference proceeding › Chapter › Academic › peer-review

Abstract

We derive rms temperature fluctuations as a function of height throughout the solar photosphere for the non-magnetic photosphere and a small area of enhanced magnetic activity, through semi-empirical inversion based on response functions of a 15-minute time sequence of 118″-long slit spectrograms taken at disk center. While the observed low photosphere shows small temperature fluctuations (about ≈ 50 K), the sub-photospheric layers and the upper photosphere show larger fluctuations, with similar gradients as in 3-D radiation-hydrodynamics simulations. However, the observed rms temperature fluctuations are lower than in the simulations at all depths, which we attribute to smearing by atmospheric seeing.

Original language	Undefined/Unknown
Title of host publication	Solar MHD theory and observations : a high spatial resolution perspective : in honor of Robert F. Stein : proceedings of a meeting held at the National Solar Observatory, Sacramento Peak, Sunspot, New Mexico, USA, 18-22 July 2005
Editors	Han Uitenbroek, John Leibacher, Robert F. Stein
Place of Publication	San Francisco
Publisher	Astronomical Society of the Pacific
Pages	43-48
Number of pages	366
ISBN (Print)	9781583812228
Publication status	Published - 2006

Publication series

Name	Astronomical Society of the Pacific conference series
Number	354

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Cite this

Koza, J., Kucera, A., Rybák, J., & Wöhl, H. (2006). The height dependence of quiet-sun photospheric temperature fluctuations in observations and simulations. In H. Uitenbroek, J. Leibacher, & R. F. Stein (Eds.), Solar MHD theory and observations : a high spatial resolution perspective : in honor of Robert F. Stein : proceedings of a meeting held at the National Solar Observatory, Sacramento Peak, Sunspot, New Mexico, USA, 18-22 July 2005 (pp. 43-48). (Astronomical Society of the Pacific conference series; No. 354). Astronomical Society of the Pacific.

Koza, J. ; Kucera, A. ; Rybák, J. et al. / The height dependence of quiet-sun photospheric temperature fluctuations in observations and simulations. Solar MHD theory and observations : a high spatial resolution perspective : in honor of Robert F. Stein : proceedings of a meeting held at the National Solar Observatory, Sacramento Peak, Sunspot, New Mexico, USA, 18-22 July 2005. editor / Han Uitenbroek ; John Leibacher ; Robert F. Stein. San Francisco : Astronomical Society of the Pacific, 2006. pp. 43-48 (Astronomical Society of the Pacific conference series; 354).

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abstract = "We derive rms temperature fluctuations as a function of height throughout the solar photosphere for the non-magnetic photosphere and a small area of enhanced magnetic activity, through semi-empirical inversion based on response functions of a 15-minute time sequence of 118″-long slit spectrograms taken at disk center. While the observed low photosphere shows small temperature fluctuations (about ≈ 50 K), the sub-photospheric layers and the upper photosphere show larger fluctuations, with similar gradients as in 3-D radiation-hydrodynamics simulations. However, the observed rms temperature fluctuations are lower than in the simulations at all depths, which we attribute to smearing by atmospheric seeing.",

author = "J. Koza and A. Kucera and J. Ryb{\'a}k and H. W{\"o}hl",

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series = "Astronomical Society of the Pacific conference series",

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Koza, J, Kucera, A, Rybák, J & Wöhl, H 2006, The height dependence of quiet-sun photospheric temperature fluctuations in observations and simulations. in H Uitenbroek, J Leibacher & RF Stein (eds), Solar MHD theory and observations : a high spatial resolution perspective : in honor of Robert F. Stein : proceedings of a meeting held at the National Solar Observatory, Sacramento Peak, Sunspot, New Mexico, USA, 18-22 July 2005. Astronomical Society of the Pacific conference series, no. 354, Astronomical Society of the Pacific, San Francisco, pp. 43-48.

The height dependence of quiet-sun photospheric temperature fluctuations in observations and simulations. / Koza, J.; Kucera, A.; Rybák, J. et al.
Solar MHD theory and observations : a high spatial resolution perspective : in honor of Robert F. Stein : proceedings of a meeting held at the National Solar Observatory, Sacramento Peak, Sunspot, New Mexico, USA, 18-22 July 2005. ed. / Han Uitenbroek; John Leibacher; Robert F. Stein. San Francisco: Astronomical Society of the Pacific, 2006. p. 43-48 (Astronomical Society of the Pacific conference series; No. 354).

Research output: Chapter in Book/Report/Conference proceeding › Chapter › Academic › peer-review

TY - CHAP

T1 - The height dependence of quiet-sun photospheric temperature fluctuations in observations and simulations

AU - Koza, J.

AU - Kucera, A.

AU - Rybák, J.

AU - Wöhl, H.

PY - 2006

Y1 - 2006

N2 - We derive rms temperature fluctuations as a function of height throughout the solar photosphere for the non-magnetic photosphere and a small area of enhanced magnetic activity, through semi-empirical inversion based on response functions of a 15-minute time sequence of 118″-long slit spectrograms taken at disk center. While the observed low photosphere shows small temperature fluctuations (about ≈ 50 K), the sub-photospheric layers and the upper photosphere show larger fluctuations, with similar gradients as in 3-D radiation-hydrodynamics simulations. However, the observed rms temperature fluctuations are lower than in the simulations at all depths, which we attribute to smearing by atmospheric seeing.

AB - We derive rms temperature fluctuations as a function of height throughout the solar photosphere for the non-magnetic photosphere and a small area of enhanced magnetic activity, through semi-empirical inversion based on response functions of a 15-minute time sequence of 118″-long slit spectrograms taken at disk center. While the observed low photosphere shows small temperature fluctuations (about ≈ 50 K), the sub-photospheric layers and the upper photosphere show larger fluctuations, with similar gradients as in 3-D radiation-hydrodynamics simulations. However, the observed rms temperature fluctuations are lower than in the simulations at all depths, which we attribute to smearing by atmospheric seeing.

M3 - Chapter

SN - 9781583812228

T3 - Astronomical Society of the Pacific conference series

SP - 43

EP - 48

BT - Solar MHD theory and observations : a high spatial resolution perspective : in honor of Robert F. Stein : proceedings of a meeting held at the National Solar Observatory, Sacramento Peak, Sunspot, New Mexico, USA, 18-22 July 2005

A2 - Uitenbroek, Han

A2 - Leibacher, John

A2 - Stein, Robert F.

PB - Astronomical Society of the Pacific

CY - San Francisco

ER -

Koza J, Kucera A, Rybák J, Wöhl H. The height dependence of quiet-sun photospheric temperature fluctuations in observations and simulations. In Uitenbroek H, Leibacher J, Stein RF, editors, Solar MHD theory and observations : a high spatial resolution perspective : in honor of Robert F. Stein : proceedings of a meeting held at the National Solar Observatory, Sacramento Peak, Sunspot, New Mexico, USA, 18-22 July 2005. San Francisco: Astronomical Society of the Pacific. 2006. p. 43-48. (Astronomical Society of the Pacific conference series; 354).