Results 11 to 20 of about 3,404 (216)
Asteroseismology of Solar-Type and Red-Giant Stars [PDF]
Annual Review of Astronomy and Astrophysics, 2013 We are entering a golden era for stellar physics driven by satellite and telescope observations of unprecedented quality and scope. New insights on stellar evolution and stellar interiors physics are being made possible by asteroseismology, the study of stars by the observation of natural, resonant oscillations.
William Chaplin, Andrea Miglio
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CONVECTION IN OBLATE SOLAR-TYPE STARS [PDF]
The Astrophysical Journal, 2016 ABSTRACT We present the first global 3D simulations of thermal convection in the oblate envelopes of rapidly rotating solar-type stars. This has been achieved by exploiting the capabilities of the new compressible high-order unstructured spectral difference (CHORUS) code.
Junfeng Wang +2 more
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Asteroseismology of solar-type stars [PDF]
Living Reviews in Solar Physics, 2019 AbstractUntil the last few decades, investigations of stellar interiors had been restricted to theoretical studies only constrained by observations of their global properties and external characteristics. However, in the last 30 years the field has been revolutionized by the ability to perform seismic investigations of stellar interiors.
Rafael A. García, Jérôme Ballot
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Duplicity Among Solar-Type Stars [PDF]
International Astronomical Union Colloquium, 1992 AbstractFrom a new study of 113 F8-G1 IV or V primaries in an apparent-magnitude limited sample, measured with a CCD for about 20 radial velocities of accuracy 0.2-0.5 km s−1 each, we collected data for 28 binary orbits and 39 visual systems. We again found a flat distribution (or slightly decreasing toward lower masses) of secondary masses, unlike the
Helmut A. Abt, Daryl W. Willmarth
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Tidal Dissipation in Rotating Solar‐Type Stars [PDF]
The Astrophysical Journal, 2007 We calculate the excitation and dissipation of low-frequency tidal oscillations in uniformly rotating solar-type stars. For tidal frequencies smaller than twice the spin frequency, inertial waves are excited in the convective envelope and are dissipated by turbulent viscosity. Enhanced dissipation occurs over the entire frequency range rather than in a
Ogilvie, G. I., Lin, D. N. C.
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Superflares on Ordinary Solar‐Type Stars
The Astrophysical Journal, 2000 16 pages, accepted for publication in ...
Schaefer, Bradley E +2 more
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Starspots on Young Solar-Type Stars [PDF]
Proceedings of the International Astronomical Union, 2013 AbstractDoppler Imaging of starspots on young solar analogues is a way to investigate the early history of solar magnetic activity by proxy. Doppler images of young G-dwarfs have yielded the presence of large polar spots, extending to moderate latitudes, along with measurements of the surface differential rotation. The differential rotation measurement
Brown, Carolyn +3 more
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Fast-rotating nearby solar-type stars [PDF]
Astronomy & Astrophysics, 2003 We present an analysis of our high-resolution spectroscopic and high-precision UBV(RI) c photometric observations of a sample of 110 nearby late-F and G-type stars selected for their large rotational velocity. The relationships between Li abundance, X-ray luminosity, and v sin i are investigated. We find that, as expected, the stars in our sample show
Cutispoto, G. +5 more
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Multiplicity among Solar-type Stars
The Astrophysical Journal, 2017 Abstract We present a multiplicity census for a volume-complete all-sky survey of 422 stars with distances less than 25 pc and primary main-sequence effective temperatures T eff ≥ 5300 K. Very similar to previous results that have been presented for various subsets of this survey, we confirm the positive correlation of ...
K. Fuhrmann +3 more
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Lithium Abundances in Solar-Type Stars [PDF]
Symposium - International Astronomical Union, 2000 We report Li abundances from the λ6707 line for 19 nearby dwarf and subgiant solar-type stars. The unevolved stars in this sample present high (> 2.00) Li abundances. We found a few cases of subgiant stars which present high Li content. The Sun seems to be part of a population of nearly unevolved stars which have depleted their Li to a high degree ...
L. da Silva, G. F. Porto de Mello
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