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(Abridged) Giant planets are observed orbiting the primary stars of close binary systems. Such planets may have formed in compact circumprimary disks, under conditions much different than those around single stars. To quantify the effects…

Earth and Planetary Astrophysics · Physics 2025-08-26 Francesco Marzari , Gennaro D'Angelo

Many stars are in binaries or higher-order multiple stellar systems. Although in recent years a large number of binaries have been proven to host exoplanets, how planet formation proceeds in multiple stellar systems has not been studied…

Earth and Planetary Astrophysics · Physics 2021-04-21 Francesco Zagaria , Giovanni P. Rosotti , Giuseppe Lodato

The presence of planets in binary systems poses interesting problems for planet formation theories, both in cases where planets must have formed in very compact discs around the individual stars and where they are located near the edge of…

Earth and Planetary Astrophysics · Physics 2019-09-25 Yayaati Chachan , Richard A. Booth , Amaury H. M. J. Triaud , Cathie Clarke

In multiple stellar systems interactions among the companion stars and their discs affect planet formation. In the circumstellar case tidal truncation makes protoplanetary discs smaller, fainter and less long-lived than those evolving in…

Earth and Planetary Astrophysics · Physics 2022-12-16 Francesco Zagaria , Giovanni P. Rosotti , Richard D. Alexander , Cathie J. Clarke

Recent observations have revealed that protoplanetary discs often exhibit cavities and azimuthal asymmetries such as dust traps and clumps. The presence of a stellar binary system in the inner disc regions has been proposed to explain the…

Earth and Planetary Astrophysics · Physics 2019-08-21 Pedro P. Poblete , Nicolás Cuello , Jorge Cuadra

Binary systems exert a gravitational torque on misaligned discs orbiting them, causing differential precession which may produce disc warping and tearing. While this is well understood for gas-only discs, misaligned cirumbinary discs of gas…

Earth and Planetary Astrophysics · Physics 2020-01-10 Hossam Aly , Giuseppe Lodato

Planet formation in close binary systems such as $\gamma$-Cephei is strongly challenged by the truncation of the circumprimary disc induced by the stellar companion, which limits the available reservoir of gas and solids. Recent…

Earth and Planetary Astrophysics · Physics 2026-05-07 María Paula Ronco , Octavio M. Guilera , Julia Venturini , Federico Zoppetti , Marcelo M. Miller Bertolami

Gas and dust in inclined orbits around binaries experience precession induced by the binary gravitational torque. The difference in precession between gas and dust alters the radial drift of weakly coupled dust and leads to density…

Earth and Planetary Astrophysics · Physics 2021-10-13 Hossam Aly , Jean-François Gonzalez , Rebecca Nealon , Cristiano Longarini , Giuseppe Lodato , Daniel J. Price

The recently discovered exoplanets in binary or higher-order multiple stellar systems sparked a new interest in the study of proto-planetary discs in stellar aggregations. Here we focus on disc solids, as they make up the reservoir out of…

Earth and Planetary Astrophysics · Physics 2021-09-08 Francesco Zagaria , Giovanni P. Rosotti , Giuseppe Lodato

We investigate the formation of dust traffic jams in polar-aligning circumbinary discs. We use 3D smoothed particle hydrodynamical simulations of both gas and dust to model an initially highly misaligned circumbinary disc around an…

Earth and Planetary Astrophysics · Physics 2024-06-12 Jeremy L. Smallwood , Min-Kai Lin , Hossam Aly , Rebecca Nealon , Cristiano Longarini

Context.Transition disks are believed to be the final stages of protoplanetary disks, during which a forming planetary system or photoevaporation processes open a gap in the inner disk, drastically changing the disk structure. From…

Earth and Planetary Astrophysics · Physics 2012-09-17 P. Pinilla , M. Benisty , T. Birnstiel

Debris disc analysis and modelling provide crucial information about the structure and the processes at play in extrasolar planetary systems. In binary systems, this issue is more complex because the disc should in addition respond to the…

Earth and Planetary Astrophysics · Physics 2015-05-19 Philippe Thebault , Francesco Marzari , Jean-Charles Augereau

We investigate via numerical modeling the effects of two planets locked in resonance, and migrating outward, on the dust distribution of the natal circumstellar disk. We aim to test whether the dust distribution exhibits peculiar features…

Earth and Planetary Astrophysics · Physics 2019-01-16 Francesco Marzari , Gennaro D'Angelo , Giovanni Picogna

In our current interpretation of the hierarchical structure of the universe it is well established that galaxies collide and merge with each other during their lifetime. If massive black holes (MBHs) reside in galactic centres, we expect…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-12 Pau Amaro-Seoane , Patrick Brem , Jorge Cuadra

Circumbinary discs are generally thought to take up angular momentum and energy from the binary orbit over time through gravitational torques mediated by orbital resonances. This process leads to the shrinkage of the binary orbit over time,…

High Energy Astrophysical Phenomena · Physics 2020-07-24 Ryan Heath , Chris Nixon

We investigate the formation of dust traffic jams in polar-aligning circumbinary discs. In our first paper, we found as the circumbinary disc evolves towards a polar configuration perpendicular to the binary orbital plane, the differential…

Earth and Planetary Astrophysics · Physics 2024-10-08 Jeremy L. Smallwood , Min-Kai Lin , Rebecca Nealon , Hossam Aly , Cristiano Longarini

Circumbinary disks are found in a variety of astrophysical scenarios, spanning binary star formation to accreting supermassive black hole binaries. The interaction with a circumbinary disk can yield opposite effects on the binary orbit…

We investigate the flow of material from highly misaligned and polar circumbinary discs that feed the formation of circumstellar discs around each binary component. With three-dimensional hydrodynamic simulations we consider equal mass…

Earth and Planetary Astrophysics · Physics 2023-02-08 Jeremy L. Smallwood , Rebecca G. Martin , Stephen H. Lubow

The star formation process in molecular clouds usually leads to the formation of multiple stellar systems, mostly binaries. Remaining disks around those stars may be located around individual stars (circumstellar disks) or around the entire…

Astrophysics · Physics 2007-05-23 Wilhelm Kley , Andreas Burkert

We present the results of two-fluid hydrodynamical simulations of circumbinary discs consisting of gas and dust, with and without embedded planets, to examine the influence of the dust on the structure of the tidally truncated inner cavity…

Earth and Planetary Astrophysics · Physics 2022-04-20 Gavin A. L. Coleman , Richard P. Nelson , Amaury H. M. J. Triaud
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