Results 51 to 60 of about 5,529 (192)
Stellar Physics and General Relativity
Astronomische Nachrichten, Volume 346, Issue 3-4, March-May 2025.ABSTRACT The general theory of relativity is currently established as the most precise theory of gravity supported by observations, and its application is diverse ranging from astronomy to cosmology, while its application to astrophysics has been restricted only to compact stars due to the assumption that the Newtonian approximation is sufficient for ...
Shuichi Yokoyama
wiley +1 more source
, 2015 Time-distance helioseismology uses cross-covariances of wave motions on the solar surface to determine the travel times of wave packets moving from one surface location to another.
Birch, Aaron C. +2 more
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Reviews of Modern Physics, 2002 60 pages, 27 figures. Scheduled for publication in Rev. Mod. Phys., Oct. 2002. A larger gzipped postscript version, with higher-quality figures, is available at http://astro.ifa.au.dk/~jcd/papers/rmp01/text-13.ps ...
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Bulletin de la Société Royale des Sciences de Liège, 2020 Helioseismology is one of the most successful fields of astrophysics. The observation and character-ization of solar oscillation has allowed solar seismologists to study the internal structure and dynamics of the Sun with unprecedented thoroughness. Ground-based networks and dedicated space missions have delivered data of exquisite quality, enabling ...
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Recent Developments in Degenerate Higher Order Scalar Tensor Theories
Annalen der Physik, Volume 537, Issue 2, February 2025.Degenerate Higher Order Scalar Tensor theories are reviewed, together with their applications in cosmology and astrophysics. These theories have been applied to build models of the early universe, in the description of the late‐time cosmic acceleration, as well as in astrophysics, including black hole physics. They have the potential to provide answers
Andrei Lazanu
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Coronal and heliospheric magnetic flux circulation and its relation to open solar flux evolution
Journal of Geophysical Research: Space Physics, Volume 122, Issue 6, Page 5870-5894, June 2017., 2017 Abstract Solar cycle 24 is notable for three features that can be found in previous cycles but which have been unusually prominent: (1) sunspot activity was considerably greater in the northern/southern hemisphere during the rising/declining phase; (2) accumulation of open solar flux (OSF) during the rising phase was modest, but rapid in the early ...
Mike Lockwood +5 more
wiley +1 more source
Helioseismology in the Future [PDF]
International Astronomical Union Colloquium, 1983 AbstractWe review the observables of helioseismology that can contribute to our knowledge of the physical conditions in the solar interior. We discuss the limitations which presently prevent helioseismology from reaching its ultimate goal. We finally present a list of projects which either are already underway or that are planned for the near future ...
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Helioseismology, solar models and neutrino fluxes [PDF]
, 1997 We present our results concerning a systematical analysis of helioseismic implications on solar structure and neutrino production. We find Y$_{ph}=0.238-0.259$, $R_b/R_\odot=0.708-0.714$ and $\rho_b=(0.185-0.199)$ gr/cm$^3$.
Arpesella +59 more
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Extreme Space Weather Events of the Past 30 Years: Preparation for Data From Mission Vigil
Earth and Space Science, Volume 12, Issue 2, February 2025.Abstract Extreme Space Weather events can negatively affect ground‐based infrastructure and satellite communications. European Space Agency plans to launch a new operational mission, Vigil, to monitor space weather activity and provide timely warnings about immediate danger.
Adam Majirský +3 more
wiley +1 more source