Results 21 to 30 of about 2,541,538 (178)

25 Years of Self-Organized Criticality: Solar and Astrophysics [PDF]

Space Science Reviews, 2014
Shortly after the seminal paper “Self-Organized Criticality: An explanation of 1/fnoise” by Bak et al. (1987), the idea has been applied to solar physics, in “Avalanches and the Distribution of Solar Flares” by Lu and Hamilton (1991).
M. Aschwanden, N. Crosby, M. Dimitropoulou, M. Georgoulis, S. Hergarten, James MdAteer, A. Milovanov, S. Mineshige, L. Morales, N. Nishizuka, G. Pruessner, R. Sánchez, Surjalal Sharma, Antoine Strugarek, V. Uritsky   +14 more
semanticscholar   +2 more sources

MESA ISOCHRONES AND STELLAR TRACKS (MIST). I. SOLAR-SCALED MODELS [PDF]

, 2016
This is the first of a series of papers presenting the Modules for Experiments in Stellar Astrophysics (MESA) Isochrones and Stellar Tracks (MIST) project, a new comprehensive set of stellar evolutionary tracks and isochrones computed using MESA, a state-
Jieun Choi, A. Dotter, C. Conroy, M. Cantiello, B. Paxton, Benjamin D. Johnson   +5 more
semanticscholar   +1 more source

The Mastcam‐Z Radiometric Calibration Targets on NASA's Perseverance Rover: Derived Irradiance Time‐Series, Dust Deposition, and Performance Over the First 350 Sols on Mars

Earth and Space Science, Volume 9, Issue 12, December 2022., 2022
Abstract The Mastcam‐Z radiometric calibration targets mounted on the NASA's Perseverance rover proved to be effective in the calibration of Mastcam‐Z images to reflectance (I/F) over the first 350 sols on Mars. Mastcam‐Z imaged the calibration targets regularly to perform reflectance calibration on multispectral image sets of targets on the Martian ...
M. Merusi, K. B. Kinch, M. B. Madsen, J. F. Bell III, J. N. Maki, A. G. Hayes, J. Joseph, J. R. Johnson, M. Rice, E. A. Cloutis, D. Applin, M. T. Lemmon, A. F. Vaughan, J. I. Núñez, E. Jensen, J. Z. Kristensen, K. Paris, E. Cisneros, M. R. Kennedy, O. Gasnault   +19 more
wiley   +1 more source

A Proper Use of the Adjacent Land‐Based Observatory Magnetic Field Data to Account for the Geomagnetic Disturbances During Offshore Directional Drilling

Space Weather, Volume 20, Issue 12, December 2022., 2022
Abstract Directional drilling in the oil fields relies particularly on the “on‐fly” measurements of the natural magnetic field (measurements while drilling; MWD); the MWD are eventually used to construct the well path. These measurements are the superposition of the signals from the internal, core and crustal, and external, ionospheric and ...
Mikhail Kruglyakov, Alexey Kuvshinov, Manoj Nair   +2 more
wiley   +1 more source

Internal gravity waves in massive stars. II. Frequency analysis across stellar mass [PDF]

Astronomy & Astrophysics, 2023
Stars with masses above 1.6 solar masses generally possess convective cores and radiative envelopes, which allows the propagation of outward-travelling internal gravity waves. We have studied the generation and propagation of IGWs in such stars using two-
R. Ratnasingam, T. Rogers, S. Chowdhury, G. Handler, R. Vanon, A. Varghese, P. Edelmann   +6 more
semanticscholar   +1 more source

A Comparison between Physics-based and Polytropic MHD Models for Stellar Coronae and Stellar Winds of Solar Analogs [PDF]

, 2017
The development of the Zeeman–Doppler Imaging (ZDI) technique has provided synoptic observations of surface magnetic fields of low-mass stars. This led the stellar astrophysics community to adopt modeling techniques that have been used in solar physics ...
O. Cohen
semanticscholar   +1 more source

Stromlo Stellar Tracks: the importance of non-Solar scaled abundances for massive stars

, 2021
I present the Stromlo Stellar Tracks [1], a set of stellar evolutionary tracks for massive stars (>10 M ), computed by modifying the Modules for Experiments in Stellar Astrophysics (MESA) 1D stellar evolution package, to fit the Galactic Concordance ...
K. Grasha
semanticscholar   +1 more source

Astrophysical Rates for Explosive Nucleosynthesis: Stellar and Laboratory Rates for Exotic Nuclei [PDF]

Nucl.Phys.A834:635c-638c,2010, 2009
A selected overview of stellar effects and reaction mechanisms with relevance to the prediction of astrophysical reaction rates far off stability is provided.
arxiv   +1 more source

The HARPS search for southern extra-solar planets [PDF]

Astronomy & Astrophysics, 2015
Context. Planetary companions of a fixed mass induce larger amplitude reflex motions around lower-mass stars, which helps make M dwarfs excellent targets for extra-solar planet searches. State of the art velocimeters with $\sim$1m/s stability can detect very low-mass planets out to the habitable zone of these stars.
Astudillo-Defru, N., Bonfils, X., Delfosse, X., Segransan, D., Forveille, T., Bouchy, F., Gillon, M., Lovis, C., Mayor, M., Neves, V., Pepe, F., Perrier, C., Queloz, D., Rojo, P., Santos, N.C., Udry, S.   +15 more
openaire   +10 more sources

The Role of Mixing in Astrophysics [PDF]

Astrophys.J.Suppl. 127 (2000) 213-218, 1999
The role of hydrodynamic mixing in astrophysics is reviewed, emphasizing connections with laser physics experiments and inertial confinement fusion (ICF). Computer technology now allows two dimensional (2D) simulations, with complex microphysics, of stellar hydrodynamics and evolutionary sequences, and holds the promise for 3D.
arxiv   +1 more source