scholarly journals The Dynamics of the HD 12661 Extrasolar Planetary System

2005 ◽  
Vol 628 (2) ◽  
pp. 1006-1013 ◽  
Author(s):  
Adrian Rodriguez ◽  
Tabare Gallardo
2020 ◽  
Vol 117 (18) ◽  
pp. 9712-9722 ◽  
Author(s):  
András Gáspár ◽  
George H. Rieke

The apparent detection of an exoplanet orbiting Fomalhaut was announced in 2008. However, subsequent observations of Fomalhaut b raised questions about its status: Unlike other exoplanets, it is bright in the optical and nondetected in the infrared, and its orbit appears to cross the debris ring around the star without the expected gravitational perturbations. We revisit previously published data and analyze additional Hubble Space Telescope (HST) data, finding that the source is likely on a radial trajectory and has faded and become extended. Dynamical and collisional modeling of a recently produced dust cloud yields results consistent with the observations. Fomalhaut b appears to be a directly imaged catastrophic collision between two large planetesimals in an extrasolar planetary system. Similar events should be very rare in quiescent planetary systems of the age of Fomalhaut, suggesting that we are possibly witnessing the effects of gravitational stirring due to the orbital evolution of hypothetical planet(s) around the star.


2013 ◽  
Vol 433 (4) ◽  
pp. 3190-3207 ◽  
Author(s):  
Giammarco Campanella ◽  
Richard P. Nelson ◽  
Craig B. Agnor

2012 ◽  
Vol 113 (1) ◽  
pp. 49-62 ◽  
Author(s):  
M. Tadeu dos Santos ◽  
G. G. Silva ◽  
S. Ferraz-Mello ◽  
T. A. Michtchenko

Nature ◽  
2006 ◽  
Vol 441 (7091) ◽  
pp. 305-309 ◽  
Author(s):  
Christophe Lovis ◽  
Michel Mayor ◽  
Francesco Pepe ◽  
Yann Alibert ◽  
Willy Benz ◽  
...  

2011 ◽  
pp. 25-32
Author(s):  
Kevin France ◽  
Jeffrey L. Linsky ◽  
Hao Yang ◽  
John T. Stocke ◽  
Cynthia S. Froning

2004 ◽  
Vol 202 ◽  
pp. 84-86 ◽  
Author(s):  
M. Mayor ◽  
D. Naef ◽  
F. Pepe ◽  
D. Queloz ◽  
N. C. Santos ◽  
...  

We report the discovery of an extrasolar planetary system with two Saturnian planets around the star HD 83443. The new planetary system is unusual by more than one aspect, as it contains two very low–mass gaseous giant planets, both on very tight orbits. Among the planets detected so far, the inner planet has the smallest semi–major axis (0.038 AU) and period (2.985 days) whereas the outer planet is the lightest one with m2 sin i = 0.53 MSat. A preliminary dynamical study confirms the stability of the system.


2004 ◽  
Vol 213 ◽  
pp. 101-106
Author(s):  
T. Joseph W. Lazio ◽  
J. Fischer ◽  
James M. Cordes

The first extrasolar planetary system was discovered around the pulsar PSR B1257+12, and the planets therein remain the lowest mass exoplanets known (with one whose mass is of order a lunar mass). Pulsar planetary systems will remain the only extrasolar planetary systems within which terrestrial-mass planets can be detected for the near future, and multiple pulsar planetary systems would provide strong circumstantial evidence that terrestrial-mass planets are ubiquitous, and possibly information about the formation of terrestrial-mass planets. We summarize two searches for planetary or proto-planetary systems around pulsars. The first is a series of infrared observations of millisecond pulsars in which the objective is to detect (proto-planetary) disks. The second uses a genetic algorithm—a function optimization method based on evolutionary processes in the natural world—to search for the signatures of planetary perturbations in pulse timing data.


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