Results 41 to 50 of about 4,300 (180)
, 2014 We present seventeen high-precision light curves of five transits of the planet Qatar-2b, obtained from four defocussed 2m-class telescopes. Three of the transits were observed simultaneously in the SDSS griz passbands using the seven-beam GROND imager ...
Bruni, I. +8 more
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Roche tomography of the secondary stars in CVs [PDF]
, 2003 The secondary stars in cataclysmic variables (CVs) are key to our understanding of the origin, evolution and behaviour of this class of interacting binary.
Dhillon, V. S., Watson, C. A.
core +2 more sources
Mapping Stellar Surfaces. II. An Interpretable Gaussian Process Model for Light Curves
The Astronomical Journal, 2021 The use of Gaussian processes (GPs) as models for astronomical time series data sets has recently become almost ubiquitous, given their ease of use and flexibility.
Rodrigo Luger +2 more
doaj +1 more source
A Young Planet Search in Visible and IR Light: DN Tau, V836 Tau, and V827 Tau
, 2008 In searches for low-mass companions to late-type stars, correlation between radial velocity variations and line bisector slope changes indicates contamination by large starspots.
Bevington +25 more
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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
Starspot detection and properties [PDF]
Proceedings of the International Astronomical Union, 2012 AbstractI review the currently available techniques for the starspots detection including the one-dimensional spot modelling of photometric light curves. Special attention will be paid to the modelling of photospheric activity based on the high-precision light curves obtained with space missions MOST, CoRoT, and Kepler.
openaire +1 more source
Starspot activity of HD 199178 [PDF]
Astronomy & Astrophysics, 2019 Context. Studying the spots of late-type stars is crucial for distinguishing between the various proposed dynamo mechanisms believed to be the main cause of starspot activity. For this research it is important to collect observation time series that are long enough to unravel both long- and short-term spot evolution. Doppler imaging is a very efficient
T. Hackman +6 more
openaire +6 more sources
Starspots and Undetected Binary Stars Have Distinct Signatures in Young Stellar Associations
The Astrophysical JournalYoung stars form in associations, meaning that young stellar associations provide an ideal environment to measure the age of a nominally coeval population.
Kendall Sullivan, Adam L. Kraus
doaj +1 more source
Magnetic activity on the young Sun: A case study of EK Draconis
Astronomy & AstrophysicsContext. Young solar analog stars provide key insights into the early stages of stellar evolution, particularly in terms of magnetic activity and rotation.
Görgei A. +10 more
doaj +1 more source
The Astrophysical Journal, 2023 Measuring the coverage of dark spots on cool stars is important to understanding how stellar magnetic activity scales with the rotation rate and convection zone depth. In this respect, it is crucial to infer surface magnetic patterns on G and K stars, to
Engin Bahar +6 more
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