Results 41 to 50 of about 1,795 (299)

Planet-induced Stellar Pulsations in HAT-P-2's Eccentric System [PDF]

, 2017
Extrasolar planets on eccentric short-period orbits provide a laboratory in which to study radiative and tidal interactions between a planet and its host star under extreme forcing conditions.
Jonathan J. Fortney, Jim Fuller, Eric Agol, Benjamin J. Fulton, Antoci, Victoria, Lewis, N. K., Langton, Jonathan, Fuller, Jim, Konstantin Batygin, Adam S. Burrows, Agol, Eric, Fulton, B. J., Batygin, Konstantin, Cowan, Nicolas B., Shporer, Avi, Showman, Adam P., Burrows, Adam, Nikole K. Lewis, Fortney, Jonathan J., de Wit, Julien, Wit, Julien de, Avi Shporer, Showman, Adam P, Adam P. Showman, Julien de Wit, Cowan, Nicolas B, Deming, Drake, Fulton, Benjamin J, Knutson, Heather A., Laughlin, Gregory, Fulton, Benjamin J., Laughlin, Gregory P., Lewis, Nikole K., Drake Deming, Nicolas B. Cowan, Jonathan Langton, Heather A. Knutson, Gregory Laughlin, Burrows, Adam S., Lewis, Nikole K, Victoria Antoci   +40 more
core   +1 more source

Self-consistent Nonlinear Classical Cepheid Pulsations during Stellar Evolution with MESA

The Astrophysical Journal
We extend the time-dependent convection (TDC) treatment in MESA by introducing eddy-viscous dissipation. This software change brings MESA-TDC into closer alignment with the radial stellar pulsation (RSP) framework of the MESA-RSP module.
Ebraheem Farag, Earl P. Bellinger, Philip Mocz, Selim Kalici, Radoslaw Smolec, Shashi Kanbur, Kyra Bettwy, Christopher Lindsay   +7 more
doaj   +1 more source

EDNRB‐dependent endothelin signaling reduces proliferation and promotes proneural‐to‐mesenchymal transition in gliomas

Molecular Oncology, EarlyView.
Glioma cells mainly express the endothelin receptor EDNRB, while EDNRA is restricted to a perivascular tumor subpopulation. Endothelin signaling reduces glioma cell proliferation while promoting migration and a proneural‐to‐mesenchymal transition associated with poor prognosis. This pathway activates Ca2+, K+, ERK, and STAT3 signalings and is regulated
Donovan Pineau, Leonor Garcia, Hugo Arnold, Antonija Hanžek, Maialen Arrieta, Laurent R Gauthier, Christine Granotier‐Beckers, François D Boussin, Amaury Herbet, Marie Hautière, Valentin Asei‐Ceschino, Clémentin Jacques, Laura Brard, Thomas Harnois, Valérie Coronas, Bruno Constantin, Aurélien Chatelier, Jean Chemin, Serge Urbach, Martial Seveno, Szimonetta Hideg, Chantal Ripoll, Kasandra Aguilar‐Cázarez, Min Zheng, Guo‐Hao Huang, Sheng‐Qing Lv, Lei Zhang, Philippe Rondard, Laurent Prezeau, Jean‐Philippe Pin, Hugues Duffau, Luc Bauchet, Valérie Rigau, Franck Denat, Charles Truillet, Didier Boquet, Jean‐Philippe Hugnot   +36 more
wiley   +1 more source

White Dwarf And Pre-White Dwarf Pulsations

, 2009
In this review I describe the basic properties of white dwarfs and their pulsations. I then discuss some of the areas in which the pulsations can provide meaningful results, such as internal chemical profiles, possible emission of >exotic> ...
Montgomery, M. H.
core   +1 more source

The abundance of helium and stellar pulsation

Astronomical & Astrophysical Transactions, 1998
Radial gradient of relative amplitude of the light variation FV for galactic classical Cepheids is found. The gradient has different signs for two cases: P > 8d and P < 8d. For P > 8d the gradient is negative. This gradient is caused by gradient of helium content in the primordial clouds, where Cepheids were born.
openaire   +3 more sources

On the question of multimode stellar pulsations [PDF]

Monthly Notices of the Royal Astronomical Society, 1986
Des observations recentes de cepheides, et naines blanches peuvent etre interpretees par la presence de jusqu'a cinq frequences reliees irrationnellement dans le spectre de puissance de leurs courbes de lumiere. A l'aide de modeles qualitatifs, on montre qu'un tel mouvement quasi periodique peut en fait se produire dans des regimes dissipatifs et non ...
R. K. Tavakol, M. K. Das
openaire   +1 more source

Cell‐cycle‐specific lesion evolution rather than inhibition of double‐strand‐break repair underpins cisplatin radiosensitization

Molecular Oncology, EarlyView.
We analyze cisplatin–DNA adducts (CDAs) and double‐strand breaks (DSBs) in a cell‐cycle‐dependent manner. We find that CDAs form similarly across all cell cycle phases. DSBs arise only in S‐phase. CDAs might not directly impair DSB repair, but S‐phase DSB lesions evolve in the presence of CDAs and disrupt repair in G2, also causing radiosensitization ...
Ye Qiu, Xixi Lin, Emil Mladenov, Veronika Mladenova, Jürgen Thomale, Ali Sak, Yao Wang, Yunxuan Deng, Eleni Gkika, Martin Stuschke, George Iliakis   +10 more
wiley   +1 more source

A nonlinear convective model for radial stellar pulsations

, 1999
The physical and numerical ingredients of the Vienna nonlinear model for radially pulsating stars are presented. Stellar pulsations are investigated by solving the full system of radiation hydrodynamics including a time-dependent formulation of turbulent
M. U. Feuchtinger
core   +1 more source

New Theoretical Instability Regions, Period–Luminosity Relations, and Masses for Blue Large-amplitude Pulsators

The Astrophysical Journal
Blue large-amplitude pulsators (BLAPs) are a recently discovered group of hot pulsating stars whose evolutionary status remains uncertain. Their proposed progenitors are either ≃0.3 M _⊙ shell H-burning stars or ≃1.0 M _⊙ core He-burning stars, both ...
Susmita Das, Daniel Jadlovský, László Molnár   +2 more
doaj   +1 more source

The critical frequency in the Stellar pulsation theory [PDF]

Space Science Reviews, 1980
AbstractThe standing oscillation in an isothermal semi-infinite plane-parallel atmosphere has a critical frequency. The significance of critical frequency in the stellar pulsation is discussed briefly. The critical period is calculated for the cepheid instability strip.
openaire   +1 more source