Results 21 to 30 of about 3,997 (213)

Solar System Science with the Orbiting Astronomical Satellite Investigating Stellar Systems (OASIS) Observatory [PDF]

, 2022
International audienceThe overarching theme of the Orbiting Astronomical Satellite for Investigating Stellar Systems (OASIS), an Astrophysics MIDEX-class mission concept, is Following water from galaxies, through protostellar systems, to Earth's oceans ...
Tielens, A.G.G.M., Walker, C., Anderson, Carrie, M, DiSanti, M.A., Bjoraker, G., Cavalié, T., DISANTI, Michael, Chin, Gordon, WALKER, Christopher, ANDERSON, Carrie, Anderson, C.M., Bjoraker, Gordon, L, Hartogh, Paul, Biver, N., Chin, G., Anderson, C., Tielens, Alexander, Cavalié, Thibault, Walker, C.K., Hartogh, P., Bjoraker, G.L., Disanti, Michael, A, Tielens, A., Walker, Christopher, K, BJORAKER, Gordon, Biver, Nicolas, DiSanti, M., Gordon L. Bjoraker, Thibault Cavalié, Alexander Tielens, Carrie M. Anderson, Michael A. DiSanti, Paul Hartogh, Christopher K. Walker, Nicolas Biver, Gordon Chin   +35 more
core   +1 more source

Understanding the Duration of Solar and Stellar Flares at Various Wavelengths

The Astrophysical Journal, 2023
Recent irradiance measurements from numerous heliophysics and astrophysics missions including Solar Dynamics Observatory (SDO), GOES, Kepler, TESS, Chandra, the X-ray Multi-Mirror Mission, and NICER have provided critical input into understanding the ...
Jeffrey W. Reep, Vladimir S. Airapetian
doaj   +1 more source

Selected topics in the evolution of low-mass stars

EPJ Web of Conferences, 2013
Low-mass stars play a key role in many different areas of astrophysics. In this article, I provide a brief overview of the evolution of low-mass stars, and discuss some of the uncertainties and problems currently affecting low-mass stellar models ...
Catelan M.
doaj   +1 more source

Granulation signatures as seen by Kepler short-cadence data

Astronomy & Astrophysics
Context. Granulation is the observable surface signature of convection in the envelopes of low-mass stars, forming the background in stellar power spectra. While well-studied in evolved giants, granulation on the main sequence has received less attention.
Larsen J. R., Lundkvist M. S., Nielsen M. B., Davies G. R., Zhou Y., Lund M. N.   +5 more
doaj   +1 more source

Solar, Stellar and Galactic Connections Between Particle Physics and Astrophysics [PDF]

, 2007
The very small and the very large are intimately connected in Nature. Particle physics and astrophysics meet in fundamental questions: the structure and evolution of stars; their end and how this is manifested; how we think galaxies are created from matter we have yet to discover and why we believe the most energetic particles cannot come from the ...
openaire   +1 more source

Current sheets in the solar corona : formation, fragmentation and heating [PDF]

, 2011
In this thesis we investigate current sheets in the solar corona. The well known 1D model for the tearing mode instability is presented, before progressing to 2D where we introduce a non-uniform resistivity.
Bowness, Ruth
core   +2 more sources

Asteroseismology and interferometry of the F7V spectroscopic binary χ Draconis A in the TESS CVZ

Astronomy & Astrophysics
Context. Asteroseismology provides precise stellar parameters, which are particularly useful for benchmark stars with accurate independent measurements. However, most benchmark solar-like oscillators are red giants. Aims.
Rudrasingam Jonatan, Lund Mikkel N., Grundahl Frank, Chowhan Arnab, Bedding Timothy R., Nissen Poul E., Serenelli Aldo, Joel Ong J. M., Thomsen Jeppe S., Li Yaguang, Panetier Eva, Basu Sarbani, Scutt Owen J., Metcalfe Travis S., Mathur Savita, Winther Mark Lykke, Hookway George T., Pope Benjamin J. S., Stokholm Amalie, Grossmann Desmond H., Larsen Jens R., Christensen-Dalsgaard Jørgen, Huber Daniel, Fredslund Mads S., White Timothy R., Beck Paul G., Pallé Pere L., García Rafael A., Kjeldsen Hans   +28 more
doaj   +1 more source

Asteroseismic modelling of the Binary HD 176465

EPJ Web of Conferences, 2017
The detection and analysis of oscillations in binary star systems is critical in understanding stellar structure and evolution. This is partly because such systems have the same initial chemical composition and age.
Nsamba B., Monteiro M. J. P. F. G., Campante T. L., Reese D. R., White T. R., García Hernández A., Jiang C.   +6 more
doaj   +1 more source

MHD turbulence and heating of the open field-line solar corona [PDF]

, 2003
This paper discusses the possibility that heating of the solar corona in open field-line regions emanating from coronal holes is due to a nonlinear cascade, driven by low-frequency or quasi-static magnetohydrodynamic fluctuations.
Dmitruk, Pablo, Milano, L., Matthaeus, William H., Dmitruk, P., Milano, L. J., Matthaeus, W. H., Mullan, D. J., Oughton, Sean, S. Oughton, P. Dmitruk, W. H. Matthaeus, L. Milano, Oughton, S., D. J. Mullan   +13 more
core   +2 more sources

History of Astronomy in Australia: Big-Impact Astronomy from World War II until the Lunar Landing (1945–1969)

Galaxies, 2021
Radio astronomy commenced in earnest after World War II, with Australia keenly engaged through the Council for Scientific and Industrial Research. At this juncture, Australia’s Commonwealth Solar Observatory expanded its portfolio from primarily studying
Alister W. Graham, Katherine H. Kenyon, Lochlan J. Bull, Visura C. Lokuge Don, Kazuki Kuhlmann   +4 more
doaj   +1 more source