Results 71 to 80 of about 4,942 (197)

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
core   +1 more source

Starspots as an Explanation for the Mysterious IYJ Continuum Excess Emission in Classical T Tauri Stars

The Astrophysical Journal
An 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, Jeffrey S. Bary, Lynne A. Hillenbrand, Madison Markham, William J. Fischer   +4 more
doaj   +1 more source

M-Dwarf Fast Rotators and the Detection of Relatively Young Multiple M-Star Systems [PDF]

, 2014
We have searched the Kepler light curves of ~3900 M-star targets for evidence of periodicities that indicate, by means of the effects of starspots, rapid stellar rotation.
Barclay, T., Handler, G., Huber, D., Joss, M., Levine, A., Muirhead, P. S., Oláh, K., Rappaport, S., Sanchis-Ojeda, R., Still, M., Swift, J., Vida, K.   +11 more
core   +3 more sources

Detecting the Companions and Ellipsoidal Variations of RS CVn Primaries: II. omicron Draconis, a Candidate for Recent Low-Mass Companion Ingestion [PDF]

, 2015
To measure the stellar and orbital properties of the metal-poor RS CVn binary o Draconis (o Dra), we directly detect the companion using interferometric observations obtained with the Michigan InfraRed Combiner at Georgia State University's Center for ...
Baron, Fabien, Brummelaar, Theo A. ten, Che, Xiao, Fekel, Francis C., Harmon, Robert O., Henry, Gregory W., Korhonen, Heidi, Latham, David W., Monnier, John D., Muterspaugh, Matthew W., Roettenbacher, Rachael M., Schaefer, Gail H., Scott, Nicholas J., Sturmann, Judit, Sturmann, Laszlo, Turner, Nils H., Williamson, Michael H.   +16 more
core   +3 more sources

Starspots on by DRA-Type Stars [PDF]

Highlights of Astronomy, 1977
The first detection of spots on dwarf M stars was by Kron on YY Geminorum in 1948. Since then phenomena attributable to starspots have been found by numerous authors beginning with Kraft and Krzeminski on the star now known as BY Draconis and on CC Eridani by Evans.
openaire   +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

Analysis of new high-precision transit light curves of WASP-10 b: starspot occultations, small planetary radius, and high metallicity

, 2011
The WASP-10 planetary system is intriguing because different values of radius have been reported for its transiting exoplanet. The host star exhibits activity in terms of photometric variability, which is caused by the rotational modulation of the spots.
Baraffe, Berta, Boisse, Budaj, C. Adam, Carter, Christian, Claret, Czesla, Dittmann, Dittmann, Ducati, Désert, Eastman, Fortney, Fortney, G. Maciejewski, G. Nowak, Girardi, Hartman, Hubbard, Huber, Hébrard, Ikoma, Johnson, Johnson, Krejcová, Kundurthy, Leconte, M. Seeliger, Maciejewski, Mandel, N. Nettelmann, Nettelmann, Poddaný, Pollacco, Pont, Popper, R. Neuhäuser, Sanchis-Ojeda, Saumon, Saumon, Silva, Silva-Valio, Silva-Valio, Skrutskie, Smith, Southworth, Southworth, Southworth, Southworth, Southworth, Southworth, St. Raetz, Van Hamme, Winn, Wolter, Zacharias   +57 more
core   +1 more source

Starspots, cycles, and magnetic fields [PDF]

Proceedings of the International Astronomical Union, 2010
AbstractI make a perhaps slightly foolhardy attempt to synthesize a semi-coherent scenario relating cycle characteristics, starspots, and the underlying magnetic fields with stellar properties such as mass and rotation. Key to this attempt is to first study single dwarfs; differential rotation plays a surprising role.
openaire   +1 more source

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

Spot evolution in the eclipsing binary CoRoT 105895502

, 2019
Stellar activity is ubiquitous in late-type stars. The special geometry of eclipsing binary systems is particularly advantageous to study the stellar surfaces and activity.
Czesla, S., Schmitt, J. H. M. M., Terzenbach, S., Wichmann, R.   +3 more
core   +1 more source