Results 51 to 60 of about 2,749 (159)
The Connection between Starspots and Flares on Main-sequence Kepler Stars [PDF]
Astrophysical Journal, 2018 Starspots and flares are indicators of stellar magnetic activity and can both be studied in greater detail by utilizing the long-term, space-based archive of the Kepler satellite.
R. Roettenbacher, K. Vida
semanticscholar +1 more source
Astronomy & AstrophysicsExtreme-precision radial velocity observations used to search for low-mass extrasolar planets are hampered by astrophysical noise originating from stellar photospheres. Starspots are a particular nuisance when observing young and active stars.
P. Dorval, I. Snellen
semanticscholar +1 more source
The Starspots of HAT-P-11: Evidence for a Solar-like Dynamo [PDF]
, 2017 We measure the starspot radii and latitude distribution on the K4 dwarf HAT-P-11 from Kepler short-cadence photometry. We take advantage of starspot occultations by HAT-P-11’s highly misaligned planet to compare the spot size and latitude distributions ...
B. Morris +4 more
semanticscholar +1 more source
Starspots in contact and semi-detached binary systems [PDF]
Nippon Tenmon Gakkai obun kenkyu hokoku, 2018 We investigated the statistical properties of both cool and hot starspots in eclipsing binary stars. The starspot and binary parameters for contact and semi-detached systems were collected from literature, which were determined on the basis of synthetic ...
S. Kouzuma
semanticscholar +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
Possible Bright Starspots on TRAPPIST-1 [PDF]
, 2018 The M8V star TRAPPIST-1 hosts seven roughly Earth-sized planets and is a promising target for exoplanet characterization. Kepler/K2 Campaign 12 observations of TRAPPIST-1 in the optical show an apparent rotational modulation with a 3.3-day period, though
B. Morris +3 more
semanticscholar +1 more source
Robust Transiting Exoplanet Radii in the Presence of Starspots from Ingress and Egress Durations [PDF]
Astronomical Journal, 2018 We typically measure the radii of transiting exoplanets from the transit depth, which are given by the ratio of cross-sectional areas of the planet and star.
B. Morris, E. Agol, L. Hebb, S. Hawley
semanticscholar +1 more source
Starspots and active regions on the emission red dwarf star
, 2002 The quasi-simultaneous electrophotometric, polarimetric and spectroscopic observations of the single active spotted star $LQ~Hya$ are presented. The photometric variability of the star can be described completely by a zonal starspots model.
I. Yu. Alekseev, O. V. Kozlova
core +1 more source
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
Distribution of Cool Starspots on the Surface of the Red Dwarf V647 Her
Astronomy reports (Print)An analysis of photometric observations of the star V647 Her (M3.5V) obtained at the 1.25-m telescope of the Crimean Astrophysical Observatory in 2022 is presented. The presence of a low-amplitude variability in brightness of the star with a period of 20.
N. I. Bondar’ +3 more
semanticscholar +1 more source