Search Results - "Hudson, Hugh"

Carrington Events by Hudson, Hugh S

“…The Carrington event in 1859, a solar flare with an associated geomagnetic storm, has served as a prototype of possible superflare occurrence on the Sun…”
Get full text

Global Properties of Solar Flares by Hudson, Hugh S.

“…This article broadly reviews our knowledge of solar flares. There is a particular focus on their global properties, as opposed to the microphysics such as that…”
Get full text

A Correlation in the Waiting-time Distributions of Solar Flares by Hudson, Hugh S

“…Abstract In a limited sample of isolated solar active regions, we find that the waiting times between flares may correlate well with flare magnitudes as…”
Get full text

Solar Flare Build-Up and Release by Hudson, Hugh S.

“…Flares and coronal mass ejections should follow a pattern of build-up and release, with the build-up phase understood as the gradual addition of stress to the…”
Get full text

Magnitude Estimates for the Carrington Flare in 1859 September: As Seen from the Original Records by Hayakawa, Hisashi, Bechet, Sabrina, Clette, Frédéric, Hudson, Hugh S., Maehara, Hiroyuki, Namekata, Kosuke, Notsu, Yuta

“…Abstract The Carrington flare in 1859 September is a benchmark, as the earliest reported solar flare and as an event with one of the greatest terrestrial…”
Get full text

Cosmic ray interactions in the solar atmosphere by Hudson, Hugh S, MacKinnon, Alec, Szydlarski, Mikolaj, Carlsson, Mats

“…ABSTRACT High-energy particles enter the solar atmosphere from Galactic or solar coronal sources, and produce ‘albedo’ emission from the quiet Sun that is now…”
Get full text

A Possible Mechanism for the “Late Phase” in Stellar White-light Flares by Yang, Kai E., Sun, Xudong, Kerr, Graham S., Hudson, Hugh S.

“…Abstract M dwarf flares observed by the Transiting Exoplanet Survey Satellite (TESS) sometimes exhibit a peak-bump light-curve morphology, characterized by a…”
Get full text

Sun-as-a-star Spectral Irradiance Observations of Transiting Active Regions by Toriumi, Shin, Airapetian, Vladimir S., Hudson, Hugh S., Schrijver, Carolus J., Cheung, Mark C. M., DeRosa, Marc L.

“…Major solar flares are prone to occur in active-region (AR) atmospheres associated with large, complex, dynamically evolving sunspots. This points to the…”
Get full text

NuSTAR observations of a repeatedly microflaring active region by Cooper, Kristopher, Hannah, Iain G, Grefenstette, Brian W, Glesener, Lindsay, Krucker, Säm, Hudson, Hugh S, White, Stephen M, Smith, David M, Duncan, Jessie

“…ABSTRACT We investigate the spatial, temporal, and spectral properties of 10 microflares from AR12721 on 2018 September 9 and 10 observed in X-rays using the…”
Get full text

The Temperature Dependence of Hot Prograde Flows in Solar Active Regions by Fitzpatrick, Jimmy C., Hudson, Hugh S.

“…Using simultaneous observations from the EUV Variability Experiment (EVE) and imaging from the Atmospheric Imaging Assembly (AIA), we characterise the…”
Get full text

ELECTRON ENERGY PARTITION IN THE ABOVE-THE-LOOPTOP SOLAR HARD X-RAY SOURCES by Oka, Mitsuo, Krucker, Sam, Hudson, Hugh S, Saint-Hilaire, Pascal

“…Solar flares produce non-thermal electrons with energies up to tens of MeVs. To understand the origin of energetic electrons, coronal hard X-ray (HXR) sources,…”
Get full text

Hot X-ray onsets of solar flares by Hudson, Hugh S, Simões, Paulo J A, Fletcher, Lyndsay, Hayes, Laura A, Hannah, Iain G

“…ABSTRACT The study of the localized plasma conditions before the impulsive phase of a solar flare can help us understand the physical processes that occur…”
Get full text

Active Region Irradiance during Quiescent Periods: New Insights from Sun-as-a-star Spectra by Kazachenko, Maria D., Hudson, Hugh S.

“…How much energy do solar active regions (ARs) typically radiate during quiescent periods? This is a fundamental question for storage and release models of…”
Get full text

THE RADIATED ENERGY BUDGET OF CHROMOSPHERIC PLASMA IN A MAJOR SOLAR FLARE DEDUCED FROM MULTI-WAVELENGTH OBSERVATIONS by Milligan, Ryan O, Kerr, Graham S, Dennis, Brian R, Hudson, Hugh S, Fletcher, Lyndsay, Allred, Joel C, Chamberlin, Phillip C, Ireland, Jack, Mathioudakis, Mihalis, Keenan, Francis P

“…This paper presents measurements of the energy radiated by the lower solar atmosphere, at optical, UV, and EUV wavelengths, during an X-class solar flare…”
Get full text

The First Survey of Quiet Sun Features Observed in Hard X-Rays with NuSTAR by Paterson, Sarah, Hannah, Iain G., Grefenstette, Brian W., Hudson, Hugh S., Krucker, Säm, Glesener, Lindsay, White, Stephen M., Smith, David M.

“…We present the first survey of quiet Sun features observed in hard X-rays (HXRs), using the Nuclear Spectroscopic Telescope ARray (NuSTAR), a HXR focusing…”
Get full text

Thomson Scattering in the Lower Corona in the Presence of Sunspots by Saint-Hilaire, Pascal, Martínez Oliveros, Juan Carlos, Hudson, Hugh S.

“…Abstract Polarized scattered light from low (few tens of megameter altitudes) coronal transients has been recently reported in Solar Dynamics…”
Get full text

Flare differentially rotates sunspot on Sun’s surface by Liu, Chang, Xu, Yan, Cao, Wenda, Deng, Na, Lee, Jeongwoo, Hudson, Hugh S., Gary, Dale E., Wang, Jiasheng, Jing, Ju, Wang, Haimin

“…Sunspots are concentrations of magnetic field visible on the solar surface (photosphere). It was considered implausible that solar flares, as resulted from…”
Get full text

Microflare Heating of a Solar Active Region Observed with NuSTAR, Hinode/XRT, and SDO/AIA by Wright, Paul J., Hannah, Iain G., Grefenstette, Brian W., Glesener, Lindsay, Krucker, Säm, Hudson, Hugh S., Smith, David M., Marsh, Andrew J., White, Stephen M., Kuhar, Matej

“…NuSTAR is a highly sensitive focusing hard X-ray (HXR) telescope and has observed several small microflares in its initial solar pointings. In this paper, we…”
Get full text

Prospects of Detecting Nonthermal Protons in Solar Flares via Lyman Line Spectroscopy: Revisiting the Orrall–Zirker Effect by Kerr, Graham S., Allred, Joel C., Kowalski, Adam F., Milligan, Ryan O., Hudson, Hugh S., Prado, Natalia Zambrana, Kucera, Therese A., Brosius, Jeffrey W.

“…Solar flares are efficient particle accelerators, with a substantial fraction of the energy released manifesting as nonthermal particles. While the role that…”
Get full text

The Characteristics of Solar X-Class Flares and CMEs: A Paradigm for Stellar Superflares and Eruptions? by Harra, Louise K., Schrijver, Carolus J., Janvier, Miho, Toriumi, Shin, Hudson, Hugh, Matthews, Sarah, Woods, Magnus M., Hara, Hirohisa, Guedel, Manuel, Kowalski, Adam, Osten, Rachel, Kusano, Kanya, Lueftinger, Theresa

“…This paper explores the characteristics of 42 solar X-class flares that were observed between February 2011 and November 2014, with data from the Solar…”
Get full text