Results 61 to 70 of about 904 (176)
Multiple short-term cycles in Kepler star KIC 6876668
Astronomy & AstrophysicsContext. Solar and stellar magnetic activity may have similar properties, which can be used to understand the stellar magnetic evolution. Aims. This paper examines the multiple short-term cycles in the total irradiance of the Sun and in the light curve ...
Gurgenashvili E. +5 more
doaj +1 more source
3D radiative MHD simulations of starspots
We computed realistic 3D radiative magnetohydrodynamic (MHD) near-surface models of starspots with substantial penumbrae on cool main sequence stars using the MURaM simulation code.
Cameron, R. +7 more
core +1 more source
The magnetic fields in Be stars are stronger than previously suggested
Astronomy & AstrophysicsContext. Recent observational studies suggest that Be stars most likely are formed through the process of mass transfer in binary systems. In view of the wide consensus that the origin of the magnetic field in stars with radiative envelopes involves ...
Hubrig S. +3 more
doaj +1 more source
Study of stellar activity through transit mapping of starspots
, 2010 During the eclipse of a planet, spots and other features on the surface of the host star may be occulted. This will cause small variations in the light curve of the star.
Adriana Valio
core +1 more source
The Connection between Starspots and Flares on Main-sequence Kepler Stars [PDF]
, 2018 Starspots and flares are indicators of stellar magnetic activity and can both be studied in greater detail by utilizing the long-term, space- based archive of the Kepler satellite.
Vida, Krisztián +2 more
core +1 more source
14. Irregularities In Young Stellar Models: Are Starspots To Blame?
, 2018 Starspots are dark areas on a star’s surface formed by intense magnetic fields that actively suppress the flow of energy, causing the area to become cooler and darker than its surroundings.
Hamilton, Jessica
core
Starspots and active regions on the chromospherically active binary MS Ser
, 2003 The quasisimultaneous electrophotometric, polarimetric and spectroscopic observations of the chromospherically active binary MS Ser are presented. The photometric variability of the star can be described completely by a zonal spottedness model.
I. Yu. Alekseev, O. V. Kozlova
core +1 more source
The Astrophysical Journal, 1974 Sizes of starspots on flare stars can be derived from the author's convection-cell hypothesis. The sizes are in fair agreement with those observed on YY Gem, CC Eri, and BY Dra by Bopp and Evans (1973). The hypothesis predicts that periodic brightness variations due to starspots are restricted to stars brighter than a critical absolute visual ...
openaire +1 more source
Starspots and spin-orbit alignment for Kepler cool host stars [PDF]
, 2012 The angle between the spin axis of the host star and the orbit of its planets (i.e., the stellar obliquity) is precious information about the formation and evolution of exoplanetary systems.
Fabrycky, Daniel C. +2 more
core +1 more source
The effect of starspots on the ages of low-mass stars determined from the lithium depletion boundary [PDF]
, 2014 In a coeval group of low-mass stars, the luminosity of the sharp transition between stars that retain their initial lithium and those at slightly higher masses in which Li has been depleted by nuclear reactions, the lithium depletion boundary (LDB), has ...
Jackson, Richard J. +5 more
core +1 more source