Results 91 to 100 of about 4,300 (180)
Estimating stellar rotation from starspot detection during planetary transits
, 2008 A new method for determining the stellar rotation period is proposed here, based on the detection of starspots during transits of an extra-solar planet orbiting its host star. As the planet eclipses the star, it may pass in front of a starspot which will
Adriana Silva-Valio +8 more
core +1 more source
Current state of the modelling of photospheric activity
, 2012 I briefly review the current state of the modelling of photospheric activity based on the high-precision optical light curves obtained with MOST, CoRoT, and Kepler. These models can be used to search for active longitudes where activity is preferentially
Lanza, A. F.
core +1 more source
Possible Bright Starspots on TRAPPIST-1
The Astrophysical Journal, 2018 Abstract 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 that rotational signal is not readily detected in the Spitzer light curve ...
Brett M. Morris +3 more
openaire +2 more sources
Probing Starspot Dynamics on the Active M Dwarf TIC 272272592: A Multiyear TESS Study
The Astrophysical JournalWe present an analysis of temporal starspot evolution and its distribution on an active rapid rotator ( P _rot = 1.22 days), TIC 272272592, using high-precision time-series photometry from the Transiting Exoplanet Survey Satellite spanning over 3 yr. The
Rajib Kumbhakar +4 more
doaj +1 more source
Starspot Temperature of CoRoT-2 from Multiwavelength Observations with SPARC4
The Astrophysical JournalMeasuring starspot temperatures is crucial for understanding stellar magnetic activity as it affects stellar brightness variations, influences exoplanet transit measurements, and provides constraints on the physical conditions and energy transport in ...
Adriana Valio +7 more
doaj +1 more source
EPJ Web of Conferences, 2017 Starspots are cooler and darker than the stellar surface. Therefore, the emitted flux of a star changes when spots are visible on its surface. The presence of spots together with the stellar rotation leads to a periodic modulation on the light curve.
Santos Ângela R. G. +4 more
doaj +1 more source
Polka-dotted Stars. II. Starspots and Obliquities of Kepler-17 and Kepler-63
The Astrophysical JournalStarspots trace stellar magnetic activity and affect both stellar evolution and exoplanet characterization. While occultation-based spot studies have been applied to individual systems, comparative analyses remain limited.
Sabina Sagynbayeva, Will M. Farr
doaj +1 more source
The Astrophysical JournalAccurate age and mass determinations for young pre-main-sequence stars are made challenging by the presence of large-scale starspots. We present results from a near-infrared spectroscopic survey of 10 T-Tauri Stars in Taurus-Auriga that characterize spot-
Facundo Pérez Paolino +3 more
doaj +1 more source
Dynamics of Large-Scale Solar Flows. [PDF]
Space Sci Rev, 2023 Hotta H +4 more
europepmc +1 more source
An exomoon survey of 70 cool giant exoplanets and the new candidate Kepler-1708 b-i. [PDF]
Nat Astron, 2022 Kipping D +8 more
europepmc +1 more source