Results 71 to 80 of about 1,347 (178)
Starspots that induce no temporal variability confound fundamental stellar properties.
, 2018 Longitudinally asymmetric starspots modulate observed stellar flux as stars rotate, an assumption underpinning the majority of stellar rotation studies and gyrochronology.
Gully-Santiago, Michael +1 more
core +1 more source
Astronomy & AstrophysicsAims. K 1-6 has long been classified as a planetary nebula (PN) hosting a binary central star; however, it has remained poorly studied due to its faintness. The central star exhibits pronounced photometric variability whose origin is still unclear.
Merc Jaroslav +24 more
doaj +1 more source
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
Transit timing and starspot-induced transit depth variations in the ∼17 Myr old HIP 67522 system★
Astronomy & AstrophysicsHIP 67522 is a one of the youngest multi-planetary systems discovered to date. The 17 Myr-old, Sun-like star is part of the Scorpius-Centarus OB association and is known to host two Saturn-sized planets in a near 2:1 mean motion resonance.
Chakraborty H. +29 more
doaj +1 more source
, 2015 Transit timing variations (TTVs) of exoplanets are normally interpreted as the consequence of gravitational interaction with additional bodies in the system.
J. H. M. M. Schmitt +2 more
core +1 more source
An approach to confirm the existence of a black hole
, 2021 Solar and lunar gravitational pulls prompt slower accelerations of large mass or faster accelerations of small mass on the Earth. Gravitation-triggered acceleration and deceleration is the cause of volcanoes, earthquakes, sunspots and starspots ...
Qiuyun Liu +2 more
core +1 more source
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
Stellar Flares, Superflares, and Coronal Mass Ejections—Entering the Big Data Era
UniverseFlares, sometimes accompanied by coronal mass ejections (CMEs), are the result of sudden changes in the magnetic field of stars with high energy release through magnetic reconnection, which can be observed across a wide range of the electromagnetic ...
Krisztián Vida +8 more
doaj +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, spin-orbit misalignment, and active latitudes in the HAT-P-11 exoplanetary system [PDF]
, 2011 We present the analysis of 4 months of Kepler photometry of the K4V star HAT-P-11, including 26 transits of its “super-Neptune” planet. The transit data exhibit numerous anomalies that we interpret as passages of the planet over dark starspots.
Sanchis Ojeda, Roberto +3 more
core +1 more source