scholarly journals Terrestrial planet formation surrounding close binary stars

Icarus ◽  
2006 ◽  
Vol 185 (1) ◽  
pp. 1-20 ◽  
Author(s):  
E QUINTANA ◽  
J LISSAUER
Keyword(s):  
Binary Stars ◽  
Planet Formation ◽  
Terrestrial Planet ◽  
Close Binary ◽  
Close Binary Stars

scholarly journals Planetary Survival and Ejection in Transient Multiple Star Systems

2012 ◽  
Vol 8 (S293) ◽  
pp. 174-176
Author(s):  
Zeyang Meng ◽  
Ji-Wei Xie ◽  
Ji-Lin Zhou
Keyword(s):  
Binary Stars ◽  
Planet Formation ◽  
Current Theory ◽  
Close Binary ◽  
Multiple Star ◽  
Binary Separation ◽  
Close Binary Stars ◽  
Binary Formation ◽  
Scattering Phase ◽  
Triple Star

AbstractMany planets have been detected in close binary stars with separation only ~20 AU. These discoveries challenge the current theory of planet formation because binary stars with such an close separation are thought to have strong perturbations and thus inhibit planet formation around them. To address this issue, another scenario had been suggested: the binary separation was wider enough for binary formation in early stages, but it shrank to the present one after a transient triple star phase (stellar scattering phase). Here, we investigate how could planet survive or be ejected under this scenario. We find that (1) the odds of planetary survival are significantly reduced if scatterings between planets and/or planetesimals are included (2) circumbinary planets/planetesimals could be readily formed during such a transient phase.

scholarly journals Earth-size planet formation in the habitable zone of circumbinary stars

2020 ◽  
Vol 494 (1) ◽  
pp. 1045-1057 ◽  
Author(s):  
G O Barbosa ◽  
O C Winter ◽  
A Amarante ◽  
A Izidoro ◽  
R C Domingos ◽  
...  
Keyword(s):  
Numerical Simulations ◽  
Planet Formation ◽  
Terrestrial Planet ◽  
Close Binary ◽  
Habitable Zone ◽  
Density Profiles ◽  
Habitable Planets ◽  
Habitable Zones ◽  
Test Particles ◽  
The Stability

ABSTRACT This work investigates the possibility of close binary (CB) star systems having Earth-size planets within their habitable zones (HZs). First, we selected all known CB systems with confirmed planets (totaling 22 systems) to calculate the boundaries of their respective HZs. However, only eight systems had all the data necessary for the computation of HZ. Then, we numerically explored the stability within HZs for each one of the eight systems using test particles. From the results, we selected five systems that have stable regions inside HZs, namely Kepler-34,35,38,413, and 453. For these five cases of systems with stable regions in HZ, we perform a series of numerical simulations for planet formation considering discs composed of planetary embryos and planetesimals, with two distinct density profiles, in addition to the stars and host planets of each system. We found that in the case of the Kepler-34 and 453 systems, no Earth-size planet is formed within HZs. Although planets with Earth-like masses were formed in Kepler-453, they were outside HZ. In contrast, for the Kepler-35 and 38 systems, the results showed that potentially habitable planets are formed in all simulations. In the case of the Kepler-413system, in just one simulation, a terrestrial planet was formed within HZ.

Radial Velocity Studies of Close Binary Stars. II.

1999 ◽  
Vol 118 (5) ◽  
pp. 2451-2459 ◽  
Author(s):  
Slavek M. Rucinski ◽  
Wenxian Lu
Keyword(s):  
Radial Velocity ◽  
Binary Stars ◽  
Close Binary ◽  
Close Binary Stars

scholarly journals Radial Velocity Studies of Close Binary Stars. XII.

2007 ◽  
Vol 133 (5) ◽  
pp. 1977-1987 ◽  
Author(s):  
Theodor Pribulla ◽  
Slavek M. Rucinski ◽  
George Conidis ◽  
Heide DeBond ◽  
J. R. Thomson ◽  
...  
Keyword(s):  
Radial Velocity ◽  
Binary Stars ◽  
Close Binary ◽  
Close Binary Stars

scholarly journals Inclinations of Circumbinary Planets: Assembly of Protoplanetary Discs and Secular Binary-Disc Interaction

2012 ◽  
Vol 8 (S293) ◽  
pp. 146-151
Author(s):  
Dong Lai ◽  
Francois Foucart
Keyword(s):  
Binary Stars ◽  
Outer Region ◽  
Orbital Plane ◽  
Close Binary ◽  
Back Reaction ◽  
Star Forming ◽  
Transiting Planets ◽  
Close Binary Stars ◽  
Mutual Inclination ◽  
Protoplanetary Discs

AbstractThe Kepler satellite has discovered a number of transiting planets around close binary stars. These circumbinary systems have highly aligned planetary and binary orbits. In this paper, we explore how the mutual inclination between the planetary and binary orbits may reflect the physical conditions of the assembly of protoplanetary discs and the interaction between protostellar binaries and circumbinary discs. Given the turbulent nature of star-forming molecular clouds, it is possible that the infalling gas onto the outer region of a circumbinary disc rotates around a different axis compared to the central protostellar binary. Thus, the newly assembled circumbinary disc can be misaligned with respect to the binary. However, the gravitational torque from the binary produces warp and twist in the disc, and the back-reaction torque tends to align the disc and the binary orbital plane. We present a new, analytic calculation of this alignment torque, and show that the binary-disc inclination angle can be reduced appreciably after the binary accretes a few percent of its mass from the disc. Since mass accretion onto the proto-binary is very likely to occur, our calculation suggests that in the absence of other disturbances, circumbinary discs and planets around close (sub-AU) stellar binaries are highly aligned with the binary orbits, while discs and planets around wide binaries can be misaligned.

scholarly journals COMMISSION 42: CLOSE BINARY STARS

2011 ◽  
Vol 7 (T28A) ◽  
pp. 219-226
Author(s):  
Ignasi Ribas ◽  
Mercedes T. Richards ◽  
Slavek Rucinski ◽  
David H. Bradstreet ◽  
Petr Harmanec ◽  
...  
Keyword(s):  
Binary Stars ◽  
Close Binary ◽  
Close Binary Stars

Close Binary Stars (Étoiles Doubles Serrées)

1997 ◽  
pp. 363-394
Author(s):  
M. Rodonò ◽  
E. F. Guinan ◽  
Y. Kondo ◽  
J. V. Clausen ◽  
H. Drechsel ◽  
...  
Keyword(s):  
Binary Stars ◽  
Close Binary ◽  
Close Binary Stars
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