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128 papers · 1 filter
Global-scale Magnetism (and Cycles) in Dynamo Simulations of Stellar Convection Zones
Benjamin P Brown, Matthew K Browning, Allan Sacha Brun +2
Young solar-type stars rotate rapidly and are very magnetically active. The magnetic fields at their surfaces likely originate in their convective envelopes where convection and ro…
Excitation of H in photodissociation regions as seen by Spitzer
Emilie Habart, Alain Abergel, Francois Boulanger +5
We present spectroscopic observations obtained with the infrared Spitzer Space Telescope, which provide insight into the H physics and gas energetics in photodissociation Regio…
Secular Chaos and the Production of Hot Jupiters
Yanqin Wu, Yoram Lithwick
In a planetary system with two or more well-spaced, eccentric, inclined planets, secular interactions may lead to chaos. The innermost planet may gradually become very eccentric an…
The Radiative Efficiency of Accretion Flows in Individual AGN
Shane W. Davis, Ari Laor
The radiative efficiency of AGN is commonly estimated based on the total mass accreted and the total AGN light emitted per unit volume in the universe integrated over time (the Sol…
Are There Echoes From The Pre-Big Bang Universe? A Search for Low Variance Circles in the CMB Sky
Amir Hajian
The existence of concentric low variance circles in the CMB sky, generated by black-hole encounters in an aeon preceding our big bang, is a prediction of the Conformal Cyclic Cosmo…
Reducing orbital eccentricity of precessing black-hole binaries
Alessandra Buonanno, Lawrence E. Kidder, Abdul H. Mroué +2
Building initial conditions for generic binary black-hole evolutions without initial spurious eccentricity remains a challenge for numerical-relativity simulations. This problem ca…