Results 71 to 80 of about 904 (176)

KIC 6362386: An Eclipsing Binary with γ Doradus–type Pulsations and Starspots

The Astronomical Journal
KIC 6362386 is an eclipsing binary system that exhibits both γ Doradus ( γ Dor)–type pulsations and starspots. In this study, we investigated this binary system using the Kepler photometry and the spectroscopic data from the Large Sky Area Multi-Object ...
Mengqi Jin, Jianning Fu, Xiaobin Zhang, Weikai Zong, Jiaxin Wang, Xiaoyu Ma, Keyu Xing, Haotian Wang   +7 more
doaj   +1 more source

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, Roberto Sanchis-Ojeda, Winn, Joshua Nathan, Joshua N. Winn   +3 more
core   +1 more source

Spectral Biases, Starspot Morphology, and Dynamo Transitions on the Pre-main Sequence: Insights from the X-Shooter WTTS Library

The Astrophysical Journal
Starspots are ubiquitous in young, low-mass stars, yet their impact on the spectral classification and fundamental parameter inference of pre-main-sequence stars (PMS) has been largely overlooked.
Facundo Pérez Paolino, Jeffrey S. Bary, Lynne A. Hillenbrand, Benjamin Horner, Adolfo Carvalho   +4 more
doaj   +1 more source

Characterisation of starspot structure and differential rotation of Kepler-411

Astronomy & Astrophysics
Context. Starspots and their movements on stellar surfaces enable the mechanisms of stellar magnetic activity to be investigated. Information on the spot distribution and differential rotation provide important constraints for the behaviour of stellar ...
Tuomi Mikko, Haris András, Hackman Thomas   +2 more
doaj   +1 more source

SS Cygni Revisited

Acta Polytechnica CTU Proceedings, 2015
New spectroscopic and photometric observations of SS Cygni, the brightest dwarf nova system, have been obtained, with the aim of mapping starspots on the surface of the secondary star.
R. C. Smith, J. Echevarrıa, J. V. Hernandez, P. Szkody   +3 more
doaj   +1 more source

The Starspots and Magnetic Fields of Young Late-F Stars [PDF]

Observations of the magnetic activity of young solar-type stars offer insights into the early history of our Sun, its dynamo activity and planetary impacts.
Hughes, James Edward
core   +1 more source

How do starspots influence the transit timing variations of exoplanets? Simulations of individual and consecutive transits

, 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, P. Ioannidis, K. F. Huber   +2 more
core   +1 more source

IAU Symposium [PDF]

, 2014
Doppler Imaging of starspots on young solar analogues is a way to investigate the early history of solar magnetic activity by proxy. Doppler images of young G-dwarfs have yielded the presence of large polar spots, extending to moderate latitudes, along ...
Waite, Ian, Carter, Brad, Waite I., Brown C., Carter B., Brown, Carolyn, Marsden, Stephen, Marsden S.   +7 more
core   +1 more source

Starspot Distribution and Flare Events in Two Young Low-mass Stars Using TESS Data

The Astrophysical Journal
Wide-field high-precision photometric observations such as the Transiting Exoplanet Survey Satellite (TESS) allowed the investigation of the stellar magnetic activity of cool stars. M dwarf starspots and stellar flares are the main indicators of magnetic
Rajib Kumbhakar, Soumen Mondal, Samrat Ghosh, Diya Ram   +3 more
doaj   +1 more source

The discovery of starspots in cataclysmic variables

, 2001
We have developed a new method to detect starspots on the surface of the secondary star in cataclysmic variables. We demonstrate that it is a good method, by deducing the host star spectral type, the temperature and percentage coverage of spots, of two U
Jeffries, RD, Webb, NA, Naylor, T
core