Results 31 to 40 of about 250 (146)
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
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Astronomy & AstrophysicsContext. Transmission spectroscopy has enabled the analysis of exoplanet atmospheres. However, a major challenge in this field is the “noise” from host stars, caused by stellar activity such as dark spots and bright plages.
Lucero Jennifer P. +4 more
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Measuring the Temperature of Starspots from Multi-filter Photometry
The Astronomical Journal, 2023 Using simultaneous multi-filter observations during the transit of an exoplanet around a K dwarf star, we determine the temperature of a starspot through modeling the radius and position with wavelength-dependent spot contrasts.
Maria C. Schutte +7 more
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The circumstellar environment of the young, low-mass dipper star JH 223
Astronomy & AstrophysicsContext. Studies of magnetospheric accretion and magnetic field topology in T Tauri stars have advanced over the years, but their applications to fully convective, very-low-mass T Tauri stars remain relatively unexplored. Aims.
Freitas T. P. +13 more
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The Astrophysical JournalAn accurate estimation of the continuum excess emission from accretion spots and inner circumstellar disk regions is crucial for a proper derivation of fundamental stellar parameters in accreting systems.
Facundo Pérez Paolino +4 more
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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
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Surface image and activity-corrected orbit of the RSCVn binary HR7275
Astronomy & AstrophysicsContext. Quantifying stellar parameters and magnetic activity for cool stars in double-lined spectroscopic binaries (SB2s) is not straightforward, as both stars contribute to the observed composite spectra and are likely variable.
Adebali Ö. +5 more
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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.
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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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Starspot Imaging Using VRI Photometry [PDF]
Symposium - International Astronomical Union, 1986 Recent progress on maximum-entropy imaging of stellar surface brightness distributions using VRI photometry and Doppler-broadened absorption line profiles is reported. VRI photometry generally provides tighter constraints on starspot configurations than does Doppler imaging (which requires the use of large telescopes).
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