Results 31 to 40 of about 2,199 (282)

Star-planet interactions. IV. Possibility of detecting the orbit-shrinking of a planet around a red giant [PDF]

Astronomy & Astrophysics, 2017
The surface rotations of some red giants are so fast that they must have been spun up by tidal interaction with a close companion, either another star, a brown dwarf, or a planet. We focus here on the case of red giants that are spun up by tidal interaction with a planet.
G. Meynet, P. Eggenberger, Giovanni Privitera, C. Georgy, Sylvia Ekstroem, Y. Alibert, C. Lovis   +6 more
openalex   +4 more sources

Searching for star-planet interactions within the magnetosphere of HD 189733 [PDF]

, 2010
HD 189733 is a K2 dwarf, orbited by a giant planet at 8.8 stellar radii. In order to study magnetospheric interactions between the star and the planet, we explore the large-scale magnetic field and activity of the host star. We collected spectra using the ESPaDOnS and the NARVAL spectropolarimeters, installed at the 3.6-m Canada-France-Hawaii telescope
R. Farès, J.‐F. Donati, C. Moutou, M. Jardine, J.‐M. Grießmeier, P. Zarka, Evgenya L. Shkolnik, D. Bohlender, C. Catala, A. Collier Cameron   +9 more
openalex   +5 more sources

Star-Planet Interactions

AIP Conference Proceedings, 2009
Much effort has been invested in recent years, both observationally and theoretically, to understand the interacting processes taking place in planetary systems consisting of a hot Jupiter orbiting its star within 10 stellar radii. Several independent studies have converged on the same scenario: that a short-period planet can induce activity on the ...
Evgenya Shkolnik, Suzanne Aigrain, Steven Cranmer, Rim Fares, Malcolm Fridlund, Frederic Pont, Jürgen Schmitt, Alexis Smith, Takeru Suzuki, Eric Stempels   +9 more
openaire   +2 more sources

TOI-1859b: A 64 Day Warm Jupiter on an Eccentric and Misaligned Orbit

The Astrophysical Journal Letters, 2023
Warm Jupiters are close-in giant planets with relatively large planet–star separations (i.e., 10 < a / R _⋆ < 100). Given their weak tidal interactions with their host stars, measurements of stellar obliquity may be used to probe the initial obliquity ...
Jiayin Dong, Songhu Wang, Malena Rice, George Zhou, Chelsea X. Huang, Rebekah I. Dawson, Gudmundur K. Stefánsson, Samuel Halverson, Shubham Kanodia, Suvrath Mahadevan, Michael W. McElwain, Jaime A. Alvarado-Montes, Joe P. Ninan, Paul Robertson, Arpita Roy, Christian Schwab, Sarah E. Logsdon, Ryan C. Terrien, Karen A. Collins, Gregor Srdoc, Ramotholo Sefako, Didier Laloum, David W. Latham, Allyson Bieryla, Paul A. Dalba, Diana Dragomir, Steven Villanueva Jr., Steve B. Howell, George R. Ricker, S. Seager, Joshua N. Winn, Jon M. Jenkins, Avi Shporer, David Rapetti   +33 more
doaj   +1 more source

Planet-star interactions with precise transit timing

Astronomy & Astrophysics
Aims. Tidal interactions shape the evolution of close-in giant planets and internal gravity-wave breaking offers an efficient pathway for dynamical-tide dissipation, although its population-wide impact remains poorly constrained.
Golonka J., Maciejewski G.
doaj   +1 more source

From energy provision to protein synthesis: Tunnelling nanotubes as mediators of intercellular metabolic cooperation in cancer

FEBS Open Bio, EarlyView.
The cytoskeleton‐mediated transport of mitochondria via tunnelling nanotubes restores respiration, increases ATP production, rescues cells from apoptosis, activates the AKT/mTOR signalling pathway, promotes cell migration and invasiveness, contributes to cancer progression and treatment resistance.
Stanislava Martínková, Jan Trnka
wiley   +1 more source

Magnetic Effect on the Evolution of an Eccentric and Inclined Orbit

The Astrophysical Journal
We provide a method to calculate the evolution of an eccentric and inclined orbit under the magnetic effect. Taking the unipolar interaction as an example, we study both coplanar and inclined orbits. We calculate the Lorentz force and then the changes in
Xing Wei
doaj   +1 more source

Interaction of free-floating planets with a star–planet pair [PDF]

Celestial Mechanics and Dynamical Astronomy, 2012
The recent discovery of free-floating planets and their theoretical interpretation as celestial bodies, either condensed independently or ejected from parent stars in tight clusters, introduced an intriguing possibility. Namely, that some exoplanets are not condensed from the protoplanetary disk of their parent star.
Varvoglis, Harry, Sgardeli, Vasiliki, Tsiganis, Kleomenis   +2 more
openaire   +2 more sources

Addressing Economic Insecurities Can Improve Patient‐Reported Outcomes in Lupus

Arthritis Care &Research, EarlyView.
Objective Economic insecurities, such as food, housing, transportation, and financial challenges, are modifiable risk factors and influence patient‐reported outcomes (PROs) in systemic lupus erythematosus (SLE). We examined the following: (1) associations between economic insecurities and PROs, and (2) the impact of screening and addressing economic ...
Jay Patel, Tripti Singh, Meredith Ingersoll, Shelby Gomez, Amanda Weber, Sarah E. Panzer, Sancia Ferguson, Christie M. Bartels, Shivani Garg   +8 more
wiley   +1 more source

Wide Binary Orbits Are Preferentially Aligned with the Orbits of Small Planets, but Probably Not Hot Jupiters

The Astronomical Journal
Studying the relative orientations of the orbits of exoplanets and wide-orbiting binary companions (semimajor axis greater than 100 au) can shed light on how planets form and evolve in binary systems. Previous observations by multiple groups discovered a
Sam Christian, Andrew Vanderburg, Juliette Becker, Adam L. Kraus, Logan Pearce, Karen A. Collins, Malena Rice, Eric L. N. Jensen, David Baker, Valerio Bozza, Paul Benni, Allyson Bieryla, Avraham Binnenfeld, Kevin I. Collins, Dennis M. Conti, Ian J. M. Crossfield, Phil Evans, Marshall C. Johnson, Eric Girardin, Joao Gregorio, Pablo Lewin, Tsevi Mazeh, Felipe Murgas, Aviad Panahi, Francisco J. Pozuelos, Don J. Radford, Howard M. Relles, Fabian Rodriguez Frustaglia, Richard P. Schwarz, Gregor Srdoc, Chris Stockdale, Thiam-Guan Tan, William C. Waalkes, Gavin Wang, Justin Wittrock, Shay Zucker   +35 more
doaj   +1 more source