Search Results - "Donea, Alina"

Seismic Transients from Flares in Solar Cycle 23 by Donea, Alina

“…Some solar flares are known to drive seismic waves into the sub-photospheres of the magnetic regions that host them. Sunquakes, which are identified as a…”
Get full text

Thermal and Non-thermal Properties of Active Region Recurrent Coronal Jets by Paraschiv, Alin R., Donea, Alina C., Judge, Philip G.

“…Abstract We present observations of recurrent active region coronal jets, and derive their thermal and non-thermal properties, by studying the physical…”
Get full text

An Explanation of Remarkable Emission-line Profiles in Post-flare Coronal Rain by Lacatus, Daniela A., Judge, Philip G., Donea, Alina

“…We study broad redshifted emission in chromospheric and transition region lines that appears to correspond to a form of post-flare coronal rain. Profiles of Mg…”
Get full text

On mode conversion, reflection, and transmission of magnetoacoustic waves from above in an isothermal stratified atmosphere by Hansen, Shelley C., Cally, Paul S., Donea, Alina-C.

“…We use the exact solutions for magnetoacoustic waves in a two-dimensional (2D) isothermal atmosphere with uniform inclined magnetic field to calculate the wave…”
Get full text

THREE-DIMENSIONAL MAGNETIC RESTRUCTURING IN TWO HOMOLOGOUS SOLAR FLARES IN THE SEISMICALLY ACTIVE NOAA AR 11283 by Liu, Chang, Deng, Na, Lee, Jeongwoo, Wiegelmann, Thomas, Jiang, Chaowei, Dennis, Brian R, Su, Yang, Donea, Alina, Wang, Haimin

“…We carry out a comprehensive investigation comparing the three-dimensional magnetic field restructuring, flare energy release, and the helioseismic response of…”
Get full text

Enhanced Acoustic Emission in Relation to the Acoustic Halo Surrounding Active Region 11429 by Hanson, Chris S., Donea, Alina C., Leka, K. D.

“…The use of acoustic holography in the high-frequency p -mode spectrum can resolve the source distributions of enhanced acoustic emissions within halo…”
Get full text

Thank You to Our 2023 Reviewers by Caprarelli, Graziella, Baratoux, David, Cervato, Cinzia, Diviacco, Paolo, Donea, Alina, Fletcher, Steven J., Gentemann, Chelle, Glaves, Helen M., Jiang, Jonathan H., Jones, Cathleen E., Maute, Astrid, Mills, Franklin P., Pryor, Sara C., Tiampo, Kristy, Xie, Zunyi

“…The Editors and Staff of Earth and Space Science thank the reviewers whose selfless work has significantly contributed to the publication process of papers…”
Get full text

Thank You to Our 2022 Reviewers by Caprarelli, Graziella, Altintas, Ilkay, Baratoux, David, Cervato, Cinzia, Diviacco, Paolo, Donea, Alina, Donnellan, Andrea, Gentemann, Chelle, Glaves, Helen M., Jiang, Jonathan H., Jones, Cathleen E., Maute, Astrid, Mills, Franklin P., Pirenne, Benoit, Pryor, Sara C., Tiampo, Kristy, Xie, Zunyi

“…Plain Language Summary The Editors and Staff of Earth and Space Science acknowledge the importance of hundreds of peer reviewers who contributed to the…”
Get full text

Radiation fields of disk, BLR and torus in quasars and blazars: implications for γ-ray absorption by Donea, Alina-C., Protheroe, R.J.

“…The radiation fields external to the jets and originating from within a few parsecs from the black hole, are discussed in this paper. They are the direct…”
Get full text

ON THE ORIGIN OF A SUNQUAKE DURING THE 2014 MARCH 29 X1 FLARE by Judge, Philip G., Kleint, Lucia, Donea, Alina, Dalda, Alberto Sainz, Fletcher, Lyndsay

Get full text

On Solar Recurrent Coronal Jets: Coronal Geysers as Sources of Electron Beams and Interplanetary Type-III Radio Bursts by Paraschiv, Alin Razvan, Donea, Alina

“…Coronal jets are transitory small-scale eruptions that are omnipresent in solar observations. Active regions jets produce significant perturbations on the…”
Get full text

The Trigger Mechanism of Recurrent Solar Active Region Jets Revealed by the Magnetic Properties of a Coronal Geyser Site by Paraschiv, Alin Razvan, Donea, Alina, Leka, K. D.

“…Solar active region jets are small-scale collimated plasma eruptions that are triggered from magnetic sites embedded in sunspot penumbral regions. Multiple…”
Get full text

Seismic Transients from Flares in Solar Cycle 23: BUKS 2009. MHD Waves and Seismology of the Solar Atmosphere. 6-8 April 2009, Leuven, Belgium by DONEA, Alina

Get full text

ON THE ORIGIN OF A SUNQUAKE DURING THE 2014 MARCH 29 X1 FLARE by Judge, Philip G, KLEINT, LUCIA, Donea, Alina, DALDA, ALBERTO SAINZ, Fletcher, Lyndsay

“…Helioseismic data from the Helioseismic Magnetic Imager instrument have revealed a sunquake associated with the X1 flare SOL2014-03-29T17:48 in active region…”
Get full text

Radiation Fields in Blazars — a Possible Extension of the Small Scale Symbiosis (Disk/Jet) into a Large Scale (Dust/Dust) Symbiosis by Donea, Alina-C., Protheroe, Raymond J.

“…In blazar models both protons and electrons may be efficiently accelerated in jets and produce γ-rays. Here we discuss the interactions of these γ-rays with…”
Get full text

Are All Flare Ribbons Simply Connected to the Corona? by Judge, Philip G., Paraschiv, Alin, Lacatus, Daniela, Donea, Alina, Lindsey, Charlie

“…Abstract We consider the observational basis for the belief that flare ribbons in the chromosphere result from energy transport from the overlying corona. We…”
Get full text

The Structure of Accretion Flow at the Base of Hets in AGN by Donea, Alina-C, Biermann, Peter L

“…This paper discusses the boundary layer and the emission spectrum from an accretion disk having a jet anchored at its inner radius, close to the black hole. We…”
Get full text

Are All Flare Ribbons Simply Connected to the Corona? The National Center for Atmospheric Research is sponsored by the National Science Foundation by Judge, Philip G., Paraschiv, Alin, Lacatus, Daniela, Donea, Alina, Lindsey, Charlie

“…We consider the observational basis for the belief that flare ribbons in the chromosphere result from energy transport from the overlying corona. We study…”
Get full text

Gamma Ray and Infrared Emission from the M87 Jet and Torus by Donea, Alina C., Protheroe, Raymond J.

“…The existence of intrinsic obscuration of Fanaroff-Riley I objects is a controversial topic. M87, the nearest such object, is puzzling in that although it has…”
Get full text

Thank You to Our 2021 Reviewers by Caprarelli, Graziella, Altintas, Ilkay, Baratoux, David, Cervato, Cinzia, Diviacco, Paolo, Donea, Alina, Donnellan, Andrea, Gentemann, Chelle, Glaves, Helen M., Jiang, Jonathan H., Jones, Cathleen E., Maute, Astrid, Pirenne, Benoit, Pryor, Sara C., Tiampo, Kristy, Xie, Zunyi

“…On behalf of the Editorial Board and Staff of Earth and Space Science, I thank the reviewers whose selfless dedication to science has ensured, once again, that…”
Get full text