Results 81 to 90 of about 5,343,913 (293)

Numerical simulations of surface convection in a late M-dwarf [PDF]

, 2002
Based on detailed 2D and 3D numerical radiation-hydrodynamics (RHD) simulations of time-dependent compressible convection, we have studied the dynamics and thermal structure of the convective surface layers of a prototypical late-type M-dwarf (Teff~2800K
Allard, Allard, Allard, Allard, Asplund, Asplund, Asplund, Baraffe, Brett, Böhm-Vitense, Chabrier, Edwards, F. Allard, Freytag, Gustafsson, H.-G. Ludwig, Hauschildt, Helling, Kurucz, Ludwig, Ludwig, Miesch, Nordlund, Nordlund, Nordlund, P. H. Hauschildt, Rossow, Steffen, Steffen, Stein, Title   +30 more
core   +2 more sources

Study of the Quasi‐5‐Day Wave in the MLT Region by a Meteor Radar Chain

Journal of Geophysical Research: Atmospheres, 2018
An extensive analysis of quasi 5‐day waves (5DWs) in the mesosphere and lower thermosphere and their responses to a major sudden stratospheric warming (SSW) event (January 2013) are presented.
Yun Gong, Chun Li, Zheng Ma, Shaodong Zhang, Qihou Zhou, Chunming Huang, K. Huang, Guozhu Li, B. Ning   +8 more
semanticscholar   +1 more source

The distribution of the ring current: Cluster observations [PDF]

Annales Geophysicae, 2011
Extending previous studies, a full-circle investigation of the ring current has been made using Cluster 4-spacecraft observations near perigee, at times when the Cluster array had relatively small separations and nearly regular tetrahedral ...
Q.-H. Zhang, M. W. Dunlop, M. Lockwood, R. Holme, Y. Kamide, W. Baumjohann, R.-Y. Liu, H.-G. Yang, E. E. Woodfield, H.-Q. Hu, B.-C. Zhang, S.-L. Liu   +11 more
doaj   +1 more source

Modeling Convective Core Overshoot and Diffusion in Procyon Constrained by Asteroseismic Data [PDF]

, 2014
We compare evolved stellar models, which match Procyons mass and position in the HR diagram, to current ground-based asteroseismic observations. Diffusion of helium and metals along with two conventional core overshoot descriptions and the Kuhfuss ...
Demarque, P., Gruberbauer, M, Guenther, D. B.   +2 more
core   +2 more sources

Disrupted Stratospheric QBO Signatures in the Diurnal Tides Over the Low‐Latitude MLT Region

Geophysical Research Letters, 2021
AbstractMeteor radar measurements of winds in the mesosphere and lower thermosphere (MLT) over Tirupati (13.63°N, 79.4°E; 2013–2020) and Microwave Limb Sounder (MLS) observations of ozone are used for investigating the effect of the disrupted stratospheric quasi‐biennial oscillation (SQBO) during the year 2016 on the diurnal tides.
M. Pramitha, K. Kishore Kumar, M. Venkat Ratnam, M. Praveen, S. Vijaya Bhaskara Rao   +4 more
openaire   +1 more source

On the anomaly of Balmer line profiles of A-type stars. Fundamental binary systems [PDF]

, 2002
In previous work, Gardiner et al. (1999) found evidence for a discrepancy between the Teff obtained from Balmer lines with that from photometry and fundamental values for A-type stars.
Alonso, Andersen, B. Smalley, Barlow, Berthet, Blackwell, Blackwell, Burnashev, Canuto, Canuto, Carnochan, Castelli, Castelli, Ciardi, Crawford, Crawford, Epchtein, F. Kupka, Flower, Gardiner, Glushneva, Hanbury Brown, Hayes, Heiter, Johnson, Jordi, Latham, M. S. Bessell, Mountain, Nordström, Petford, Popper, Popper, R. B. Gardiner, Ribas, Ribas, Smalley, Smalley, Smalley, Torres, van Belle, van't Veer-Menneret, Vidal   +42 more
core   +2 more sources

Long‐lasting remodeling of astrocytes in an Scna1+/− mouse model of Dravet syndrome

Epilepsia, EarlyView.
Abstract Objective Dravet syndrome (DS) is a prototypical developmental and epileptic encephalopathy caused by mutations in the SCN1A gene, leading to loss of function of the voltage‐gated sodium channel Naᵥ1.1. The latter causes early onset drug‐resistant seizures and enduring cognitive and behavioral deficits.
Athénaïs Genin, Alicia Janvier, Tristan Moujellil‐Legagneur, Marine Blaquière, Alexis Chaussy, Romane Privé, Fabrice Duprat, Massimo Mantegazza, Etienne Audinat, Nicola Marchi, Noémie Cresto   +10 more
wiley   +1 more source

Effects of electrojet turbulence on a magnetosphere-ionosphere simulation of a geomagnetic storm [PDF]

, 2017
Ionospheric conductance plays an important role in regulating the response of the magnetosphere‐ionosphere system to solar wind driving. Typically, models of magnetosphere‐ionosphere coupling include changes to ionospheric conductance driven by extreme ...
Dimant, Y., Liu, J., Lyon, J.G., Merkin, V., Oppenheim, M., Sitnov, M.I., Stephens, G.K., Toffoletto, F., Wang, W., Wiltberger, M., Zhang, B.   +10 more
core   +1 more source

Reconstructing the Holocene explosive eruptive history of the Erciyes volcano (Turkey) using proximal and distal tephra records

Journal of Quaternary Science, EarlyView.
ABSTRACT Mount Erciyes, the largest active volcano of Central Anatolia (Turkey), erupted explosively during the Holocene, producing the Karagüllü, Perikartin and Dikkartin tuff rings. Even though major cities like Kayseri and its ~1 million residents sit directly on these pyroclastic deposits, the timing and magnitude of the explosive eruptions have ...
Ivan Sunyé‐Puchol, Rengin Özsoy‐Ünal, Xavier Bolós, Victoria C. Smith, Efe Akkas, Lorenzo Tavazzani, Jan Aymerich, Manuela Nazzari, Pierre Lacan, Victoria Cullen, Olivier Bachmann, Piergiorgio Scarlato, Silvio Mollo   +12 more
wiley   +1 more source

First results from the CAWSES-India Tidal Campaign [PDF]

Annales Geophysicae, 2008
The first CAWSES-India Tidal Campaign was conducted by the Indian scientific community during March–April 2006. The objectives of this campaign were: (1) To determine the characteristics of tides in the troposphere and lower stratosphere (0–20 km) and
S. Gurubaran, D. Narayana Rao, G. Ramkumar, T. K. Ramkumar, G. Dutta, B. V. Krishna Murthy   +5 more
doaj   +1 more source