Results 11 to 20 of about 3,291 (142)
Follow‐up observations of the binary system γ Cep
Astronomische Nachrichten, Volume 343, Issue 5, June 2022., 2022 Abstract We present follow‐up imaging and spectroscopic observations of the exoplanet host star γ Cep A, and of its low‐mass stellar companion γ Cep B. We used the lucky‐imager AstraLux at the Calar Alto observatory to follow the orbital motion of the companion around its primary, whose radial velocity (RV) was determined with spectra of the star ...
Markus Mugrauer +4 more
wiley +1 more source
The Resilience of Habitable Climates Around Circumbinary Stars
Journal of Geophysical Research: Planets, Volume 125, Issue 9, September 2020., 2020 Abstract Here we use a 3‐D climate system model to study the habitability of Earth‐like planets orbiting in circumbinary systems. In the most extreme cases, Earth‐like planets in circumbinary systems could experience variations in the incident stellar flux of up to ~50% on ~100‐day timescales.
Eric T. Wolf +7 more
wiley +1 more source
Frame-Dragging in Extrasolar Circumbinary Planetary Systems
Universe, 2022 Extrasolar circumbinary planets are so called because they orbit two stars instead of just one; to date, an increasing number of such planets have been discovered with a variety of techniques.
Lorenzo Iorio
doaj +1 more source
Instabilities in Multi-Planet Circumbinary Systems [PDF]
, 2019 The majority of the discovered transiting circumbinary planets are located very near the innermost stable orbits permitted, raising questions about the origins of planets in such perturbed environments.
Kratter, Kaitlin M., Sutherland, Adam P.
core +2 more sources
The Astronomical Journal, 2023 A possible polar-ring debris disk, the dynamics of which can be described by the outer hierarchical restricted three-body problem, has been detected in 99 Herculis.
Ying Wang +4 more
doaj +1 more source
Orbital evolution of a circumbinary planet in a gaseous disk
Earth, Planets and Space, 2019 Sub-Jupiter classed circumbinary planets discovered in close-in binary systems have orbits just beyond the dynamically unstable region, which is determined by the eccentricity and mass ratio of the host binary stars.
Akihiro Yamanaka, Takanori Sasaki
doaj +1 more source
Geometrical and Physical Properties of Circumbinary Discs in Eccentric Stellar Binaries [PDF]
, 2008 In a previous work (Pichardo et al. 2005), we studied stable configurations for circumstellar discs in eccentric binary systems. We searched for "invariant loops": closed curves (analogous to stable periodic orbits in time-independent potentials) that ...
Akeson +71 more
core +1 more source
Modelling Circumbinary Planets: The case of Kepler-38 [PDF]
, 2014 Recently, a number of planets orbiting binary stars have been discovered by the Kepler space telescope. In a few systems the planets reside close to the dynamical stability limit.
Haghighipour, Nader, Kley, Wilhelm
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Near-infrared Accretion Signatures from the Circumbinary Planetary-mass Companion Delorme 1 (AB)b
The Astrophysical Journal Letters, 2022 Accretion signatures from bound brown dwarf and protoplanetary companions provide evidence for ongoing planet formation, and accreting substellar objects have enabled new avenues to study the astrophysical mechanisms controlling the formation and ...
S. K. Betti +10 more
doaj +1 more source
Advances in Astronomy, Volume 2015, Issue 1, 2015., 2015 The paper deals with a modification of the restricted three‐body problem in which the angular velocity variation is considered in the case where the primaries are sources of radiation. In particular, the existence and stability of its equilibrium points in the plane of motion of the primaries are studied. We find that this problem admits the well‐known
E. A. Perdios +4 more
wiley +1 more source