141 citations · 1.6k across the 36 of their papers we have counts for
36 papers
Searching for evidence of subchromospheric magnetic reconnection on the Sun
D. Baker, L. van Driel-Gesztelyi, A. W. James +13
Within the coronae of stars, abundances of those elements with low first ionization potential (FIP) often differ from their photospheric values. The coronae of the Sun and solar-ty…
Identifying plasma fractionation processes in the chromosphere using IRIS
David M. Long, Deborah Baker, Andy S. H. To +7
The composition of the solar corona differs from that of the photosphere, with the plasma thought to fractionate in the solar chromosphere according to the First Ionisation Potenti…
Intriguing Plasma Composition Pattern in a Solar Active Region: a Result of Non-Resonant Alfvén Waves?
Teodora Mihailescu, David H. Brooks, J. Martin Laming +6
The plasma composition of the solar corona is different from that of the solar photosphere. Elements that have a low first ionisation potential (FIP) are preferentially transported…
Slow Solar Wind Connection Science during Solar Orbiter's First Close Perihelion Passage
Stephanie L. Yardley, Christopher J. Owen, David M. Long +76
The Slow Solar Wind Connection Solar Orbiter Observing Plan (Slow Wind SOOP) was developed to utilise the extensive suite of remote sensing and in situ instruments on board the ESA…
Understanding the Relationship between Solar Coronal Abundances and F10.7 cm Radio Emission
Andy S. H. To, Alexander W. James, T. S. Bastian +7
Sun-as-a-star coronal plasma composition, derived from full-Sun spectra, and the F10.7 radio flux (2.8 GHz) have been shown to be highly correlated (r = 0.88) during solar cycle 24…
Re-calibration of the Sunspot Number: Status Report
F. Clette, L. Lefèvre, T. Chatzistergos +18
We report progress on the ongoing recalibration of the Wolf sunspot number (SN) and Group sunspot number (GN) following the release of version 2.0 of SN in 2015. This report consti…
What determines active region coronal plasma composition?
Teodora Mihailescu, Deborah Baker, Lucie M. Green +4
The chemical composition of the solar corona is different from that of the solar photosphere, with the strongest variation being observed in active regions (ARs). Using data from t…
Extending the FIP bias sample to magnetically active stars. Challenging the FIP bias paradigm?
B. Seli, K. Oláh, L. Kriskovics +6
The different elemental abundances of the photosphere and the corona are striking features of not only the Sun, but other stars as well. This phenomenon is known as the FIP effect…
Evolution of Plasma Composition in an Eruptive Flux Rope
Deborah Baker, Lucie M. Green, David H. Brooks +8
Magnetic flux ropes are bundles of twisted magnetic field enveloping a central axis. They harbor free magnetic energy and can be progenitors of coronal mass ejections (CMEs), but i…
On the Origin of Magnetic Pertubations associated with the FIP effect
M. Murabito, M. Stangalini, D. Baker +9
In \citet{Stangalini20} and \citet{Deb20}, magnetic oscillations were detected in the chromosphere of a large sunspot and found to be linked to the coronal locations where a First…
Coronal Elemental Abundances in Solar Emerging Flux Regions
Deborah Baker, David H. Brooks, Lidia van Driel-Gesztelyi +5
The chemical composition of solar and stellar atmospheres differs from that of their photospheres. Abundances of elements with low first ionization potential (FIP) are enhanced in…
On-disc Observations of Flux Rope Formation Prior to its Eruption
A. W. James, L. M. Green, E. Palmerio +6
Coronal mass ejections (CMEs) are one of the primary manifestations of solar activity and can drive severe space weather effects. Therefore, it is vital to work towards being able…
Evolution of the Magnetic Field Distribution of Active Regions
Sally Dacie, Pascal Démoulin, Lidia van Driel-Gesztelyi +5
Aims. Although the temporal evolution of active regions (ARs) is relatively well understood, the processes involved continue to be the subject of investigation. We study how the ma…
Flux cancellation and the evolution of the eruptive filament of 2011 June 7
S. L. Yardley, L. M. Green, D. R. Williams +3
We investigate whether flux cancellation is responsible for the formation of a very massive filament resulting in the spectacular 2011 June 7 eruption. We analyse and quantify the…
IAU commission 10 "Solar Activity": Legacy report and triennial report for 2012-2015
Carolus J. Schrijver, Lyndsay Fletcher, Lidia van Driel-Gesztelyi +8
After more than half a century of community support related to the science of "solar activity'', IAU's Commission 10 was formally discontinued in 2015, to be succeeded by C.E2 with…
Persistent Near-Surface Flow Structures from Local Helioseismology
R. Howe, R. W. Komm, D. Baker +3
Near-surface flows measured by the ring-diagram technique of local helioseismology show structures that persist over multiple rotations. We examine these phenomena using data from…
Parallel Evolution of Quasi-separatrix Layers and Active Region Upflows
C. H. Mandrini, D. Baker, P. Démoulin +6
Persistent plasma upflows were observed with Hinode's EUV Imaging Spectrometer (EIS) at the edges of active region (AR) 10978 as it crossed the solar disk. We analyze the evolution…
FIP Bias Evolution in a Decaying Active Region
D. Baker, D. H. Brooks, P. Démoulin +4
Solar coronal plasma composition is typically characterized by first ionization potential (FIP) bias. Using spectra obtained by Hinode's EUV Imaging Spectrometer (EIS) instrument,…
The Counter-kink Rotation of a Non-Hale Active Region
M. C. López Fuentes, P. Démoulin, C. H. Mandrini +1
We describe the long-term evolution of a bipolar non-Hale active region which was observed from October, 1995, to January, 1996. Along these four solar rotations the sunspots and s…
Magnetic Twist and Writhe of Active Regions: On the Origin of Deformed Flux Tubes
M. López Fuentes, P. Démoulin, C. H. Mandrini +2
We study the long term evolution of a set of 22 bipolar active regions (ARs) in which the main photospheric polarities are seen to rotate one around the other during several solar…
How Can Active Region Plasma Escape into the Solar Wind from below a Closed Helmet Streamer?
C. H. Mandrini, F. A. Nuevo, A. M. Vásquez +6
Recent studies show that active-region (AR) upflowing plasma, observed by the EUV-Imaging Spectrometer (EIS), onboard Hinode, can gain access to open field-lines and be released in…
Coronal magnetic reconnection driven by CME expansion -- the 2011 June 7 event
L. van Driel-Gesztelyi, D. Baker, T. Torok +10
Coronal mass ejections (CMEs) erupt and expand in a magnetically structured solar corona. Various indirect observational pieces of evidence have shown that the magnetic field of CM…
Tracking Solar Active Region Outflow Plasma from its Source to the near-Earth Environment
J. L. Culhane, D. H. Brooks, L. van Driel-Gesztelyi +6
Seeking to establish whether active region upflow material contributes to the slow solar wind, we examine in detail the plasma upflows from Active Region (AR)10978, which crossed t…
The Evolution of Writhe in Kink-Unstable Flux Ropes and Erupting Filaments
Tibor Torok, Bernhard Kliem, Mitchell A. Berger +3
The helical kink instability of a twisted magnetic flux tube has been suggested as a trigger mechanism for solar filament eruptions and coronal mass ejections (CMEs). In order to i…