Results 81 to 90 of about 12,606 (256)

High-energy environment of super-Earth 55 Cnc e I: Far-UV chromospheric variability as a possible tracer of planet-induced coronal rain

, 2018
The irradiation of close-in planets by their star influences their evolution and might be responsible for a population of ultra-short period planets eroded to their bare core.
Bourrier, V., Ehrenreich, D., Etangs, A. Lecavelier des, Lavie, B., Louden, T., Pepe, F., Udry, S., Vidal-Madjar, A., Wheatley, P. J., Wyttenbach, A.   +9 more
core   +2 more sources

Horseshoe‐Shaped Vortices Accompanied With Breaking of Upward Propagating Gravity Waves and Their Relation to Mean‐Flow Acceleration

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 24, 28 December 2025.
Abstract Breaking gravity waves (GWs) are a major source of turbulence and momentum deposition in the middle atmosphere. In spite of the importance of this phenomenon, the small‐scale vortex structures associated with wave breaking remain poorly documented under realistic conditions.
M. Kohma, K. Sato, D. C. Fritts, T. S. Lund   +3 more
wiley   +1 more source

Production of N2 Vegard-Kaplan and Lyman-Birge-Hopfield emissions on Pluto

, 2014
We have developed a model to calculate the emission intensities of various vibrational transitions of N$_2$ triplet band and Lyman-Birge-Hopfield (LBH) band emissions in the dayglow of Pluto for solar minimum, moderate, and maximum conditions.
Bhardwaj, Anil, Jain, Sonal Kumar
core   +1 more source

The Far-Ultraviolet Spectrum and Short Timescale Variability of AM Herculis from Observations with the Hopkins Ultraviolet Telescope [PDF]

, 1998
Using the Hopkins Ultraviolet Telescope (HUT), we have obtained 850-1850 angstrom spectra of the magnetic cataclysmic variable star AM Her in the high state.
Beardmore A. P., Bradford W. Greeley, Cropper M. S., Davey S. C., Frank J., Gansicke B. T., Heise J., John C. Raymond, King A. R., Knox S. Long, Kuijpers J., Mukai K., Ramsay G., Southwell K. A., van Teeseling A., Wickramasinghe D. T., William P. Blair   +16 more
core   +3 more sources

First Observation of Localized F Region Bottom‐Type Scattering Layer by All‐Sky Radar at Low Latitude

Geophysical Research Letters, Volume 52, Issue 23, 16 December 2025.
Abstract F‐region bottom‐type scattering layers (BSLs) occurring over equatorial and low latitudes may act as the precursor of plasma bubbles, usually observed by narrow‐beam very high frequency radars. However, their spatial features remain unknown due to the radar narrow field‐of‐view.
Wenjie Sun, Guozhu Li, Lianhuan Hu, Biqiang Zhao, Jianfei Liu, Haiyong Xie, Guofeng Dai, Xiukuan Zhao, Yi Li, Baiqi Ning   +9 more
wiley   +1 more source

Detection of wave activity in measurements of thermospheric vertical winds and temperatures at subauroral latitudes

Frontiers in Astronomy and Space Sciences
The need for high precision measurements of vertical winds with uncertainties on the scale of 3–5 m s−1 and a temporal cadence of 1–2 min to achieve detection of gravity wave (GW) structure has made it exceedingly difficult to study the response of the ...
Anneliese L. Schmidt, John W. Meriwether, Matthew B. Cooper, Andrew J. Gerrard, Lindsay V. Goodwin, Shun-Rong Zhang, Ying Ye   +6 more
doaj   +1 more source

Redefining SAR Arc Generation: The Competing Roles of Magnetospheric and Ionospheric Energy Injection

AGU Advances, Volume 6, Issue 6, December 2025.
Abstract Stable auroral red (SAR) arcs are luminous subauroral emissions produced by the collisional excitation of oxygen atoms during geomagnetically active times. While traditionally attributed to inner magnetospheric electron heating, recent observations and simulations challenge the exclusivity of this mechanism.
Jing Liu, Wenbin Wang, Jun Liang, Libo Liu, Carlos Martinis, Joei Wroten, Yongliang Zhang, Yao Chen, Tianyu Cao, Yifan Lu   +9 more
wiley   +1 more source

Simultaneous Observations of Quasi‐Orthogonal Nighttime MSTIDs at Conjugate African‐European Midlatitude Stations on 4 October 2018

Journal of Geophysical Research: Space Physics, Volume 130, Issue 12, December 2025.
Abstract Two quasi‐orthogonal nighttime medium‐scale traveling ionospheric disturbances (MSTIDs) were observed by conjugate midlatitude all‐sky imagers in Sutherland (32.4° ${}^{\circ}$S, 20.8° ${}^{\circ}$E; magnetic latitude: ∼ ${\sim} $−40.9° ${}^{\circ}$) and Asiago (45.87° ${}^{\circ}$N, 11.53° ${}^{\circ}$E; magnetic latitude: ∼40.3° ${\sim} 40.3{
Zama T. Katamzi‐Joseph, Carlos Martinis, Jonathan J. Makela, Yuichi Otsuka, John Bosco Habarulema, Alicreance Hiyadutuje, Shai Toledano, Mark B. Moldwin, Jeffrey Baumgardner   +8 more
wiley   +1 more source

Simultaneous Measurements of Variations in the Artificial Airglow and the Total Electron Content of the Ionosphere Caused by Powerful Radio Waves of "Sura'' Facility [PDF]

Учёные записки Казанского университета: Серия Физико-математические науки, 2016
The results of simultaneous observations of variations in the artificial airglow in the red line of the optical spectrum of atomic oxygen (630 nm) and the total electron content (TEC) of the ionosphere measured along the propagation paths of the ...
D.A. Kogogin, A.V. Shindin, I.A. Nasyrov, S.M. Grach   +3 more
doaj  

JHK Spectra of the z=2.39 Radio Galaxy 53W002 [PDF]

, 2001
We present low-resolution, near-IR JHK spectra of the weak z=2.39 radio galaxy 53W002, obtained with the OH-airglow Suppressor spectrograph (OHS) and Cooled Infrared Spectrograph and Camera for OHS (CISCO) on the Subaru Telescope.
Harashima, T., Hata, R., Iwamuro, F., Iye, M., Maihara, T., Motohara, K., Simpson, C., Taguchi, T., Yamada, T., Yoshida, M.   +9 more
core   +2 more sources