Search Results - "KOWALSKI, Adam F"

Bridging High-density Electron Beam Coronal Transport and Deep Chromospheric Heating in Stellar Flares by Kowalski, Adam F.

“…Abstract The optical and near-ultraviolet (NUV) continuum radiation in M-dwarf flares is thought to be the impulsive response of the lower stellar atmosphere…”
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A UNIFIED COMPUTATIONAL MODEL FOR SOLAR AND STELLAR FLARES by Allred, Joel C., Kowalski, Adam F., Carlsson, Mats

“…ABSTRACT We present a unified computational framework that can be used to describe impulsive flares on the Sun and on dMe stars. The models assume that the…”
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Stellar flares by Kowalski, Adam F.

“…Magnetic storms on stars manifest as remarkable, randomly occurring changes of the luminosity over durations that are tiny in comparison to the normal…”
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Parameterizations of Chromospheric Condensations in dG and dMe Model Flare Atmospheres by Kowalski, Adam F., Allred, Joel C.

“…The origin of the near-ultraviolet and optical continuum radiation in flares is critical for understanding particle acceleration and impulsive heating in…”
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The Atmospheric Response to High Nonthermal Electron Beam Fluxes in Solar Flares. I. Modeling the Brightest NUV Footpoints in the X1 Solar Flare of 2014 March 29 by Kowalski, Adam F., Allred, Joel C., Daw, Adrian, Cauzzi, Gianna, Carlsson, Mats

“…The 2014 March 29 X1 solar flare (SOL20140329T17:48) produced bright continuum emission in the far- and near-ultraviolet (NUV) and highly asymmetric…”
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Decay Timescales of Chromospheric Condensations in Solar Flare Footpoints by Butler, Elizabeth C., Kowalski, Adam F.

“…Abstract Chromospheric condensations (CCs) are a prominent feature of flare footpoint heating in the solar flare standard model, yet their timescales and…”
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Modeling the Transport of Nonthermal Particles in Flares Using Fokker-Planck Kinetic Theory by Allred, Joel C., Alaoui, Meriem, Kowalski, Adam F., Kerr, Graham S.

“…We describe a new approach for modeling the transport of high-energy particles accelerated during flares from the acceleration region in the solar corona until…”
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Constraints on Stellar Flare Energy Ratios in the NUV and Optical from a Multiwavelength Study of GALEX and Kepler Flare Stars by Brasseur, C. E., Osten, Rachel A., Tristan, Isaiah I., Kowalski, Adam F.

“…Abstract We present a multiwavelength study of stellar flares on primarily G-type stars using overlapping time domain surveys in the near-ultraviolet (NUV) and…”
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Modeling Mg ii h, k and Triplet Lines at Solar Flare Ribbons by Zhu, Yingjie, Kowalski, Adam F., Tian, Hui, Uitenbroek, Han, Carlsson, Mats, Allred, Joel C.

“…Observations from the Interface Region Imaging Spectrograph often reveal significantly broadened and non-reversed profiles of the Mg ii h, k and triplet lines…”
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The Relationships among Solar Flare Impulsiveness, Energy Release, and Ribbon Development by Tamburri, Cole A., Kazachenko, Maria D., Kowalski, Adam F.

“…Abstract We develop the impulsiveness index, a new classification system for solar flares using the Solar Dynamics Observatory/Extreme Ultraviolet Experiment…”
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Time-dependent Stellar Flare Models of Deep Atmospheric Heating by Kowalski, Adam F., Allred, Joel C., Carlsson, Mats

“…Abstract Optical flares have been observed from magnetically active stars for many decades; unsurprisingly, the spectra and temporal evolution are complicated…”
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Deconstructing Photospheric Spectral Lines in Solar and Stellar Flares by Monson, Aaron J., Mathioudakis, Mihalis, Kowalski, Adam F.

“…Abstract During solar flares, spectral lines formed in the photosphere have been shown to exhibit changes to their profiles despite the challenges of energy…”
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A New View of the Solar Interface Region from the Interface Region Imaging Spectrograph (IRIS) by De Pontieu, Bart, Polito, Vanessa, Hansteen, Viggo, Testa, Paola, Reeves, Katharine K., Antolin, Patrick, Nóbrega-Siverio, Daniel Elias, Kowalski, Adam F., Martinez-Sykora, Juan, Carlsson, Mats, McIntosh, Scott W., Liu, Wei, Daw, Adrian, Kankelborg, Charles C.

“…The Interface Region Imaging Spectrograph (IRIS) has been obtaining near- and far-ultraviolet images and spectra of the solar atmosphere since July 2013. IRIS…”
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The Near-ultraviolet Continuum Radiation in the Impulsive Phase of HF/GF-type dMe Flares. I. Data by Kowalski, Adam F., Wisniewski, John P., Hawley, Suzanne L., Osten, Rachel A., Brown, Alexander, Fariña, Cecilia, Valenti, Jeff A., Brown, Stephen, Xilouris, Manolis, Schmidt, Sarah J., Johns-Krull, Christopher

“…We present near-UV (NUV) flare spectra from the Hubble Space Telescope (HST)/Cosmic Origins Spectrograph during two moderate-amplitude U-band flares on the…”
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Spectral Evidence for Heating at Large Column Mass in Umbral Solar Flare Kernels. I. IRIS Near-UV Spectra of the X1 Solar Flare of 2014 October 25 by Kowalski, Adam F., Butler, Elizabeth, Daw, Adrian N., Fletcher, Lyndsay, Allred, Joel C., Pontieu, Bart De, Kerr, Graham S., Cauzzi, Gianna

“…The GOES X1 flare SOL2014-10-25T17:08:00 was a three-ribbon solar flare observed with the Interface Region Imaging Spectrograph (IRIS) in the near-UV (NUV) and…”
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KEPLER FLARES. IV. A COMPREHENSIVE ANALYSIS OF THE ACTIVITY OF THE dM4e STAR GJ 1243 by Silverberg, Steven M., Kowalski, Adam F., Davenport, James R. A., Wisniewski, John P., Hawley, Suzanne L., Hilton, Eric J.

“…ABSTRACT We present a comprehensive study of the active dM4e star GJ 1243. We use previous observations and ground-based echelle spectroscopy to determine that…”
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Modeling of the Hydrogen Lyman Lines in Solar Flares by Brown, Stephen A., Fletcher, Lyndsay, Kerr, Graham S., Labrosse, Nicolas, Kowalski, Adam F., Rodríguez, Jaime De La Cruz

“…The hydrogen Lyman lines (91.2 nm < λ < 121.6 nm) are significant contributors to the radiative losses of the solar chromosphere, and they are enhanced during…”
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Can Proton Beam Heating Flare Models Explain Sunquakes? by Sadykov, Viacheslav M., Stefan, John T., Kosovichev, Alexander G., Stejko, Andrey M., Kowalski, Adam F., Allred, Joel C., Kerr, Graham S.

“…Abstract Solar Dynamics Observatory (SDO)/Helioseismic and Magnetic Imager (HMI) observations reveal a class of solar flares with substantial energy and…”
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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…”
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Apache Point Observatory (APO)/SMARTS Flare Star Campaign Observations. I. Blue Wing Asymmetries in Chromospheric Lines during Mid-M-Dwarf Flares from Simultaneous Spectroscopic and Photometric Observation Data by Notsu, Yuta, Kowalski, Adam F., Maehara, Hiroyuki, Namekata, Kosuke, Hamaguchi, Kenji, Enoto, Teruaki, Tristan, Isaiah I., Hawley, Suzanne L., Davenport, James R. A., Honda, Satoshi, Ikuta, Kai, Inoue, Shun, Namizaki, Keiichi, Nogami, Daisaku, Shibata, Kazunari

“…Abstract We conducted the time-resolved simultaneous optical spectroscopic and photometric observations of mid-M-dwarf flare stars YZ CMi, EV Lac, and AD Leo…”
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