Results 31 to 40 of about 1,347 (178)
Starspot Activity without Pulsation in the Binary System KIC 5444392 Revisited
Universe, 2023 We revisited the short-period (∼1.5 days) binary system KIC 5444392, which shows quasi-period modulated light variations. Previous studies indicated that these variations might be caused by stellar pulsations.
Mengqi Jin +3 more
doaj +1 more source
Hunt for Starspots in HARPS Spectra of G and K Stars [PDF]
, 2020 We present a method for detecting starspots on cool stars using the cross-correlation function (CCF) of high-resolution molecular spectral templates applied to archival high-resolution spectra of G and K stars observed with the High Accuracy Radial ...
Hoeijmakers, H. Jens +3 more
core +4 more sources
Light curve analysis of W-UMa type binary systems RZ UMi, OQ UMa, LP UMa [PDF]
Serbian Astronomical JournalThis study presents new, high-quality, optical photometric observations of three W-UMa type contact binaries. The analysis of the corresponding light curves is made using Djurašević's inverse problem method.
Grozdanović M., Đurašević G.
doaj +1 more source
Proceedings of the International Astronomical Union, 2010 AbstractStarspots are being observed with many different techniques but not always with coherent results. In particular not if model-dependent data analysis must be employed, e.g. through two-dimensional spot modelling of one-dimensional photometric light curves. I review the zoo of currently available physical spot parameters, i.e.
openaire +1 more source
Investigating stellar surface rotation using observations of starspots [PDF]
, 2011 Rapid rotation enhances the dynamo operating in stars, and thus also introduces significantly stronger magnetic activity than is seen in slower rotators.
Korhonen, Heidi Helena
core +1 more source
Highlights of Astronomy, 1986 AbstractThe general methodology to detect and study solar-like surface inhomogeneities on stars is presented. The most significant observations and typical results are discussed with particular emphasis on the inferred physical characteristics of starspots and plages and differential rotation, as compared to solar values.
openaire +1 more source
Under-Developed and Under-Utilized Eclipsing Binary Model Capabilities [PDF]
Journal of Astronomy and Space Sciences, 2012 Existing but largely unused binary star model capabilities are examined. An easily implemented scheme is parameterization of starspot growth and decay that can stimulate work on outer convection zones and their dynamos.
R. E. Wilson
doaj +1 more source
The STELLA Robotic Observatory on Tenerife
Advances in Astronomy, Volume 2010, Issue 1, 2010., 2010 The Astrophysical Institute Potsdam (AIP) and the Instituto de Astrofísica de Canarias (IAC) inaugurated the robotic telescopes STELLA‐I and STELLA‐II (STELLar Activity) on Tenerife on May 18, 2006. The observatory is located on the Izaña ridge at an elevation of 2400 m near the German Vacuum Tower Telescope.
Klaus G. Strassmeier +12 more
wiley +1 more source
Doppler Imaging of Starspots [PDF]
International Astronomical Union Colloquium, 1983 ABSTRACTWe discuss a newly-developed technique for spatially resolving starspots on some of the more rapidly rotating RS CVn stars. Basically, the method uses high resolution, very high signal-to-noise spectral line profiles and exploits the Doppler velocity correspondence between position across the stellar disk and wavelength position across a ...
Steven S. Vogt, G. Donald Penrod
openaire +1 more source
Differential rotation of Kepler-71 via transit photometry mapping of faculae and starspots [PDF]
, 2019 Knowledge of dynamo evolution in solar-type stars is limited by the difficulty of using active region monitoring to measure stellar differential rotation, a key probe of stellar dynamo physics.
Zaleski, S. M. +3 more
core +1 more source