Results 51 to 60 of about 4,300 (180)
, 2017 Several studies have shown that stellar activity features, such as occulted and non-occulted starspots, can affect the measurement of transit parameters biasing studies of transit timing variations and transmission spectra. We present $\texttt{PyTranSpot}
Cubillos, P. E. +7 more
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Doppler imaging combined with high-cadence photometry
Astronomy & AstrophysicsContext. Latitude distribution of stellar magnetic activity is not well constrained by observations, despite its importance for a better understanding of stellar dynamos and their effects on planetary environments. Aims.
Lee S. +13 more
doaj +1 more source
Stellar Evolution Models of Young Stars: Progress and Limitations
, 2015 Stellar evolution models are a cornerstone of young star astrophysics, which necessitates that they yield accurate and reliable predictions of stellar properties.
Feiden, Gregory A.
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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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Core-envelope Decoupling Drives Radial Shear Dynamos in Cool Stars
The Astrophysical Journal Letters, 2023 Differential rotation is thought to be responsible for the dynamo process in stars like our Sun, driving magnetic activity and starspots. We report that starspot measurements in the Praesepe open cluster are strongly enhanced only for stars that depart ...
Lyra Cao +2 more
doaj +1 more source
Modeling the Rise of Fibril Magnetic Fields in Fully Convective Stars [PDF]
, 2016 Many fully convective stars exhibit a wide variety of surface magnetism, including starspots and chromospheric activity. The manner by which bundles of magnetic field traverse portions of the convection zone to emerge at the stellar surface is not ...
Browning, Matthew K., Weber, Maria A.
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Why do some spotted stars become bluer as they become fainter? [PDF]
, 2004 Chromospherically active, spotted stars generally become redder as well as fainter when large starspots rotate into view on the stellar disc. However, the RS CVn system UX Ari (a triple-lined system), becomes bluer as it gets fainter.
Aarum-Ulvås, V., Henry, G. W.
core +2 more sources
Time evolution and rotation of starspots on CoRoT-2 from the modelling of transit photometry
, 2011 CoRoT-2, the second planet-hosting star discovered by the CoRoT satellite, is a young and active star. A total of 77 transits were observed for this system over a period of 135 days.
Lanza, A. F., Silva-Valio, Adriana
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The GAPS Programme with HARPS-N at TNG VIII: Observations of the Rossiter-McLaughlin effect and characterisation of the transiting planetary systems HAT-P-36 and WASP-11/HAT-P-10 [PDF]
, 2015 We determine the true and the projected obliquity of HAT-P-36 and WASP-11/HAT-P-10 systems, respectively, which are both composed of a relatively cool star and a hot-Jupiter planet.
Affer, L. +38 more
core +4 more sources
Subduction, Stratosphere, Starspots, and Sushi
Eos, 2017 Highlights from AGU’s joint meeting with the Japan Geophysical Union.
Jenny Lunn +4 more
openaire +1 more source