scholarly journals Habitable Planet Formation in Binary Planetary Systems

2007 ◽  
Vol 666 (1) ◽  
pp. 436-446 ◽  
Author(s):  
Nader Haghighipour ◽  
Sean N. Raymond
Keyword(s):  
Planet Formation ◽  
Planetary Systems ◽  
Habitable Planet

scholarly journals Habitable planet formation in extreme planetary systems: systems with multiple stars and/or multiple planets

2007 ◽  
Vol 3 (S249) ◽  
pp. 319-324
Author(s):  
Nader Haghighipour
Keyword(s):  
Binary Stars ◽  
Binary Systems ◽  
Planet Formation ◽  
Planetary Systems ◽  
Dynamical Evolution ◽  
Giant Planets ◽  
Habitable Planets ◽  
Multiple Stars ◽  
Habitable Zones ◽  
Habitable Planet

AbstractUnderstanding the formation and dynamical evolution of habitable planets in extrasolar planetary systems is a challenging task. In this respect, systems with multiple giant planets and/or multiple stars present special complications. The formation of habitable planets in these environments is strongly affected by the dynamics of their giant planets and/or their stellar companions. These objects have profound effects on the structure of the disk of planetesimals and protoplanetary objects in which terrestrial-class planets are formed. To what extent the current theories of planet formation can be applied to such “extreme” planetary systems depends on the dynamical characteristics of their planets and/or their binary stars. In this paper, I present the results of a study of the possibility of the existence of Earth-like objects in systems with multiple giant planets (namely υ Andromedae, 47 UMa, GJ 876, and 55 Cnc) and discuss the dynamics of the newly discovered Neptune-sized object in 55 Cnc system. I will also review habitable planet formation in binary systems and present the results of a systematic search of the parameter-space for which Earth-like objects can form and maintain long-term stable orbits in the habitable zones of binary stars.

Habitable Planet Formation in Binary Star Systems

Icarus ◽  
1998 ◽  
Vol 132 (1) ◽  
pp. 196-203 ◽  
Author(s):  
Daniel P Whitmire ◽  
John J Matese ◽  
Lee Criswell ◽  
Seppo Mikkola
Keyword(s):  
Planet Formation ◽  
Binary Star ◽  
Habitable Planet

scholarly journals A Decreased Probability of Habitable Planet Formation around Low‐Mass Stars

2007 ◽  
Vol 669 (1) ◽  
pp. 606-614 ◽  
Author(s):  
Sean N. Raymond ◽  
John Scalo ◽  
Victoria S. Meadows
Keyword(s):  
Planet Formation ◽  
Low Mass Stars ◽  
Low Mass ◽  
Habitable Planet

scholarly journals N-body Simulations of Planet Formation

2003 ◽  
Vol 208 ◽  
pp. 25-35 ◽  
Author(s):  
Shigeru Ida ◽  
Eiichiro Kokubo ◽  
Junko Kominami
Keyword(s):  
Final Stage ◽  
Planet Formation ◽  
Planetary Systems ◽  
Terrestrial Planet ◽  
The Other ◽  
Other Hand ◽  
Giant Impacts ◽  
Gas Accretion

Accretion from many small planetesimals to planets is reviewed. Solid protoplanets accrete through runaway and oligarchic growth until they become isolated. The isolation mass of protoplanets in terrestrial planet region is about 0.1-0.2 Earth mass, which suggests giant impacts among the protoplanets in the final stage of terrestrial planet formation. On the other hand, the isolation mass in Jupiter's and Saturn's orbits is about a few to 5 Earth masses, which may be massive enough to trigger gas accretion onto the cores. The isolation mass in Uranus and Neptune's orbits is as large as their present cores. Extending the above arguments to extrasolar planetary systems that are formed from disks with various initial masses, we also discuss diversity of extrasolar planetary systems.

scholarly journals Six transiting planets and a chain of Laplace resonances in TOI-178

2021 ◽  
Author(s):  
Adrien Leleu
Keyword(s):  
Planet Formation ◽  
Planetary Systems ◽  
Single System ◽  
Transiting Planets ◽  
Orbital Configuration ◽  
Resonant Systems ◽  
Formation And Evolution ◽  
A Chain ◽  
Formation Phase

<p class="p1">Determining the architecture of multi-planetary systems is one of the cornerstones of understanding planet formation and evolution. Resonant systems are especially important as the fragility of their orbital configuration ensures that no significant scattering or collisional event has taken place since the earliest formation phase when the parent protoplanetary disc was still present. As unveiled by TESS, CHEOPS, ESPRESSO, NGTS and SPECULOOS, TOI-178 harbours at least six planets in the super-Earth to mini-Neptune regimes, all planets but the innermost one form a 2:4:6:9:12 chain of Laplace resonances, and the planetary densities show important variations from planet to planet. TOI-178 have hence several characteristics that were not previously observed in a single system, making it a key system for the study of processes of formation and evolution of planetary systems. We will review what we know of TOI-178, and what we expect from futur observations.</p>

scholarly journals Terrestrial planet formation in low-mass disks: dependence with initial conditions

2014 ◽  
Vol 9 (S310) ◽  
pp. 218-219
Author(s):  
M. P. Ronco ◽  
G. C. de Elía ◽  
O. M. Guilera
Keyword(s):  
Gas Phase ◽  
Analytical Model ◽  
Ad Hoc ◽  
Planet Formation ◽  
Initial Conditions ◽  
Planetary Systems ◽  
Terrestrial Planet ◽  
Initial Distribution ◽  
Protoplanetary Disk ◽  
Low Mass

AbstractIn general, most of the studies of terrestrial-type planet formation typically use ad hoc initial conditions. In this work we improved the initial conditions described in Ronco & de Elía (2014) starting with a semi-analytical model wich simulates the evolution of the protoplanetary disk during the gas phase. The results of the semi-analytical model are then used as initial conditions for the N-body simulations. We show that the planetary systems considered are not sensitive to the particular initial distribution of embryos and planetesimals and thus, the results are globally similar to those found in the previous work.

scholarly journals The Diversity of Extrasolar Terrestrial Planets

2009 ◽  
Vol 5 (S265) ◽  
pp. 399-402
Author(s):  
Jade C. Bond ◽  
Dante S. Lauretta ◽  
David P. O'Brien
Keyword(s):  
Chemical Equilibrium ◽  
Planet Formation ◽  
Planetary Systems ◽  
Solid Material ◽  
Terrestrial Planet ◽  
Building Blocks ◽  
Terrestrial Planets ◽  
Dynamical Models ◽  
Diverse Range ◽  
Host Stars

AbstractExtrasolar planetary host stars are enriched in key planet-building elements. These enrichments have the potential to drastically alter the building blocks available for terrestrial planet formation. Here we report on the combination of dynamical models of late-stage terrestrial planet formation within known extrasolar planetary systems with chemical equilibrium models of the composition of solid material within the disk. This allows us to constrain the bulk elemental composition of extrasolar terrestrial planets. A wide variety of resulting planetary compositions exist, ranging from those that are essentially “Earth-like”, containing metallic Fe and Mg-silicates, to those that are dominated by graphite and SiC. This implies that a diverse range of terrestrial planets are likely to exist within extrasolar planetary systems.

scholarly journals Testing planet formation models with Gaia μas astrometry

2007 ◽  
Vol 3 (S248) ◽  
pp. 256-259 ◽  
Author(s):  
A. Sozzetti ◽  
S. Casertano ◽  
M. G. Lattanzi ◽  
A. Spagna ◽  
R. Morbidelli ◽  
...  
Keyword(s):  
Large Scale ◽  
Extrasolar Planets ◽  
Planet Formation ◽  
Planetary Systems ◽  
Unique Contribution ◽  
Double Blind

AbstractIn this paper, we first summarize the results of a large-scale double-blind tests campaign carried out for the realistic estimation of the Gaia potential in detecting and measuring planetary systems. Then, we put the identified capabilities in context by highlighting the unique contribution that the Gaia exoplanet discoveries will be able to bring to the science of extrasolar planets during the next decade.

scholarly journals Planetary Systems Dynamics Eccentric patterns in debris disks & Planetary migration in binary systems

2013 ◽  
Vol 8 (S299) ◽  
pp. 212-213
Author(s):  
V. Faramaz ◽  
H. Beust ◽  
J.-C. Augereau ◽  
A. Bonsor ◽  
P. Thébault ◽  
...  
Keyword(s):  
Binary Systems ◽  
Planet Formation ◽  
Planetary Systems ◽  
Systems Dynamics ◽  
Debris Disks ◽  
Space Observatory ◽  
Herschel Space Observatory ◽  
Migration Mechanism ◽  
Planetary Migration

AbstractWe present some highlights of two ongoing investigations that deal with the dynamics of planetary systems. Firstly, until recently, observed eccentric patterns in debris disks were found in young systems. However recent observations of Gyr-old eccentric debris disks leads to question the survival timescale of this type of asymmetry. One such disk was recently observed in the far-IR by the Herschel Space Observatory around ζ2 Reticuli. Secondly, as a binary companion orbits a circumprimary disk, it creates regions where planet formation is strongly handicapped. However, some planets were detected in this zone in tight binary systems (γ Cep, HD 196885). We aim to determine whether a binary companion can affect migration such that planets are brought in these regions and focus in particular on the planetesimal-driven migration mechanism.

Sign in / Sign up

Export Citation Format

Share Document