Small-scale Hα jets in the solar chromosphere

David Kuridze; M. Mathioudakis; D. B. Jess; D. J. Christian; F. P. Keenan; K. S. Balasubramaniam

doi:10.1051/0004-6361/201117427

Small-scale Hα jets in the solar chromosphere

David Kuridze, M. Mathioudakis, D. B. Jess, D. J. Christian, F. P. Keenan, K. S. Balasubramaniam

Department of Physics

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

8 Citations (Scopus)

Abstract

Aims. High temporal and spatial resolution observations from the Rapid Oscillations in the Solar Atmosphere (ROSA) multiwavelength
imager on the Dunn Solar Telescope are used to study the velocities of small-scale Hα jets in an emerging solar active region.

Methods. The dataset comprises simultaneous imaging in the Hα core, Ca ii K, and G band, together with photospheric line-of-sight
magnetograms. Time-distance techniques are employed to determine projected plane-of-sky velocities.

Results. The Hα images are highly dynamic in nature, with estimated jet velocities as high as 45 km s−1. These jets are one-directional,
with their origin seemingly linked to underlying Ca ii K brightenings and G-band magnetic bright points.

Conclusions. It is suggested that the siphon flow model of cool coronal loops is suitable for interpreting our observations. The jets
are associated with small-scale explosive events, and may provide a mass outflow from the photosphere to the corona

Original language	English
Article number	A76
Number of pages	5
Journal	Astronomy and Astrophysics
Volume	533
DOIs	https://doi.org/10.1051/0004-6361/201117427
Publication status	Published - 01 Sept 2011

Keywords

sun: activity
sun: chromosphere
sun: faculae, plages
sun: photosphere
sun: surface magnetism

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title = "Small-scale Hα jets in the solar chromosphere",

abstract = "Aims. High temporal and spatial resolution observations from the Rapid Oscillations in the Solar Atmosphere (ROSA) multiwavelengthimager on the Dunn Solar Telescope are used to study the velocities of small-scale Hα jets in an emerging solar active region.Methods. The dataset comprises simultaneous imaging in the Hα core, Ca ii K, and G band, together with photospheric line-of-sightmagnetograms. Time-distance techniques are employed to determine projected plane-of-sky velocities.Results. The Hα images are highly dynamic in nature, with estimated jet velocities as high as 45 km s−1. These jets are one-directional,with their origin seemingly linked to underlying Ca ii K brightenings and G-band magnetic bright points.Conclusions. It is suggested that the siphon flow model of cool coronal loops is suitable for interpreting our observations. The jetsare associated with small-scale explosive events, and may provide a mass outflow from the photosphere to the corona",

keywords = "sun: activity, sun: chromosphere, sun: faculae, plages, sun: photosphere, sun: surface magnetism",

author = "David Kuridze and M. Mathioudakis and Jess, {D. B.} and Christian, {D. J.} and Keenan, {F. P.} and Balasubramaniam, {K. S.}",

year = "2011",

month = sep,

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doi = "10.1051/0004-6361/201117427",

language = "English",

volume = "533",

journal = "Astronomy and Astrophysics",

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T1 - Small-scale Hα jets in the solar chromosphere

AU - Kuridze, David

AU - Mathioudakis, M.

AU - Jess, D. B.

AU - Christian, D. J.

AU - Keenan, F. P.

AU - Balasubramaniam, K. S.

PY - 2011/9/1

Y1 - 2011/9/1

N2 - Aims. High temporal and spatial resolution observations from the Rapid Oscillations in the Solar Atmosphere (ROSA) multiwavelengthimager on the Dunn Solar Telescope are used to study the velocities of small-scale Hα jets in an emerging solar active region.Methods. The dataset comprises simultaneous imaging in the Hα core, Ca ii K, and G band, together with photospheric line-of-sightmagnetograms. Time-distance techniques are employed to determine projected plane-of-sky velocities.Results. The Hα images are highly dynamic in nature, with estimated jet velocities as high as 45 km s−1. These jets are one-directional,with their origin seemingly linked to underlying Ca ii K brightenings and G-band magnetic bright points.Conclusions. It is suggested that the siphon flow model of cool coronal loops is suitable for interpreting our observations. The jetsare associated with small-scale explosive events, and may provide a mass outflow from the photosphere to the corona

AB - Aims. High temporal and spatial resolution observations from the Rapid Oscillations in the Solar Atmosphere (ROSA) multiwavelengthimager on the Dunn Solar Telescope are used to study the velocities of small-scale Hα jets in an emerging solar active region.Methods. The dataset comprises simultaneous imaging in the Hα core, Ca ii K, and G band, together with photospheric line-of-sightmagnetograms. Time-distance techniques are employed to determine projected plane-of-sky velocities.Results. The Hα images are highly dynamic in nature, with estimated jet velocities as high as 45 km s−1. These jets are one-directional,with their origin seemingly linked to underlying Ca ii K brightenings and G-band magnetic bright points.Conclusions. It is suggested that the siphon flow model of cool coronal loops is suitable for interpreting our observations. The jetsare associated with small-scale explosive events, and may provide a mass outflow from the photosphere to the corona

KW - sun: activity

KW - sun: chromosphere

KW - sun: faculae, plages

KW - sun: photosphere

KW - sun: surface magnetism

U2 - 10.1051/0004-6361/201117427

DO - 10.1051/0004-6361/201117427

M3 - Article

SN - 0004-6361

VL - 533

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A76

ER -

Small-scale Hα jets in the solar chromosphere

Abstract

Keywords

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