Hinode observations of chromospheric brightenings in the CA II H line during small-scale flux emergence events

Philippa Browning; S. L. Guglielmino; F. Zuccarello; P. Romano; L. R Bellot Rubio

doi:10.1086/593145

Hinode observations of chromospheric brightenings in the CA II H line during small-scale flux emergence events

Philippa Browning, S. L. Guglielmino, F. Zuccarello, P. Romano, L. R Bellot Rubio

Research output: Contribution to journal › Article › peer-review

Abstract

Ca ii H emission is a well-known indicator of magnetic activity in the Sun and other stars. It is also viewed as an important signature of chromospheric heating. However, the Ca ii H line has not been used as a diagnostic of magnetic flux emergence from the solar interior. Here we report on Hinode observations of chromospheric Ca ii H brightenings associated with a repeated, small-scale flux emergence event. We describe this process and investigate the evolution of the magnetic flux, G-band brightness, and Ca ii H intensity in the emerging region. Our results suggest that energy is released in the chromosphere as a consequence of interactions between the emerging flux and the preexisting magnetic field, in agreement with recent 3D numerical simulations. © 2008. The American Astronomical Society.

Original language	English
Pages (from-to)	L111-L114
Journal	Astrophysical Journal
Volume	687
Issue number	2
DOIs	https://doi.org/10.1086/593145
Publication status	Published - 2008

Keywords

Sun: Activity
Sun: Chromosphere
Sun: Magnetic fields
Sun: Photosphere

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title = "Hinode observations of chromospheric brightenings in the CA II H line during small-scale flux emergence events",

abstract = "Ca ii H emission is a well-known indicator of magnetic activity in the Sun and other stars. It is also viewed as an important signature of chromospheric heating. However, the Ca ii H line has not been used as a diagnostic of magnetic flux emergence from the solar interior. Here we report on Hinode observations of chromospheric Ca ii H brightenings associated with a repeated, small-scale flux emergence event. We describe this process and investigate the evolution of the magnetic flux, G-band brightness, and Ca ii H intensity in the emerging region. Our results suggest that energy is released in the chromosphere as a consequence of interactions between the emerging flux and the preexisting magnetic field, in agreement with recent 3D numerical simulations. {\textcopyright} 2008. The American Astronomical Society.",

keywords = "Sun: Activity, Sun: Chromosphere, Sun: Magnetic fields, Sun: Photosphere",

author = "Philippa Browning and Guglielmino, {S. L.} and F. Zuccarello and P. Romano and Rubio, {L. R Bellot}",

note = "Bian, N. H. Browning, P. K.",

year = "2008",

doi = "10.1086/593145",

language = "English",

volume = "687",

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journal = "Astrophysical Journal",

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publisher = "American Astronomical Society",

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TY - JOUR

T1 - Hinode observations of chromospheric brightenings in the CA II H line during small-scale flux emergence events

AU - Browning, Philippa

AU - Guglielmino, S. L.

AU - Zuccarello, F.

AU - Romano, P.

AU - Rubio, L. R Bellot

N1 - Bian, N. H. Browning, P. K.

PY - 2008

Y1 - 2008

N2 - Ca ii H emission is a well-known indicator of magnetic activity in the Sun and other stars. It is also viewed as an important signature of chromospheric heating. However, the Ca ii H line has not been used as a diagnostic of magnetic flux emergence from the solar interior. Here we report on Hinode observations of chromospheric Ca ii H brightenings associated with a repeated, small-scale flux emergence event. We describe this process and investigate the evolution of the magnetic flux, G-band brightness, and Ca ii H intensity in the emerging region. Our results suggest that energy is released in the chromosphere as a consequence of interactions between the emerging flux and the preexisting magnetic field, in agreement with recent 3D numerical simulations. © 2008. The American Astronomical Society.

AB - Ca ii H emission is a well-known indicator of magnetic activity in the Sun and other stars. It is also viewed as an important signature of chromospheric heating. However, the Ca ii H line has not been used as a diagnostic of magnetic flux emergence from the solar interior. Here we report on Hinode observations of chromospheric Ca ii H brightenings associated with a repeated, small-scale flux emergence event. We describe this process and investigate the evolution of the magnetic flux, G-band brightness, and Ca ii H intensity in the emerging region. Our results suggest that energy is released in the chromosphere as a consequence of interactions between the emerging flux and the preexisting magnetic field, in agreement with recent 3D numerical simulations. © 2008. The American Astronomical Society.

KW - Sun: Activity

KW - Sun: Chromosphere

KW - Sun: Magnetic fields

KW - Sun: Photosphere

U2 - 10.1086/593145

DO - 10.1086/593145

M3 - Article

SN - 1538-4357

VL - 687

SP - L111-L114

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

ER -

Hinode observations of chromospheric brightenings in the CA II H line during small-scale flux emergence events

Abstract

Keywords

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