Breakdown of planetary systems in embedded clusters

Rickman, H.; Wajer, P.; Przyłuski, Robert; Wiśniowski, T.; Nesvorný, David; Morbidelli, A.

doi:10.1093/mnras/stac3705

Cited by 9 publications

(2 citation statements)

References 57 publications

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“…The resulting NAMD modal value (2.2 × 10 −2 ) is 17 times higher than that of the Solar System, with the 3σ range extending from five times (6.4 × 10 −3 ) to 120 times (0.16) that of the Solar System. As discussed by Turrini et al (2020Turrini et al ( , 2022 and illustrated by the recent study by Rickman et al (2023), such a systematically high range of NAMD values is associated with phases of dynamical instability and planet-planet scattering events (either in the past or presently).…”

Section: Dynamical Excitation Of V1298 Tau B and Ementioning

confidence: 90%

The GAPS programme at TNG

Turrini,

Marzari,

Polychroni

et al. 2023

A&A

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Context. Observational data from space- and ground-based campaigns have revealed that the 10-30 Ma old V1298Tau star hosts a compact and massive system of four planets. Mass estimates are available for the two outer giant planets and point to unexpectedly high densities for their young ages. Aims. We investigate the formation of these two outermost giant planets, V1298 Tau b and e, and the present dynamical state of V1298 Tau’s global architecture in order to shed light on the history of this young and peculiar extrasolar system. Methods. We performed detailed N-body simulations to explore the link between the densities of V1298 Tau b and e and their migration and accretion of planetesimals within the native circumstellar disk. We combined N-body simulations and the normalized angular momentum deficit (NAMD) analysis of the architecture to characterize V1298 Tau’s dynamical state and connect it to the formation history of the system. We searched for outer planetary companions to constrain V1298 Tau’s planetary architecture and the extension of its primordial circumstellar disk. Results. The high densities of V1298 Tau b and e suggest they formed at quite a distance from their host star, likely beyond the CO2 snowline. The higher nominal density of V1298 Tau e suggests it formed farther out than V1298 Tau b. The current architecture of V1298 Tau is not characterized by resonant chains. Planet-planet scattering with an outer giant planet is the most likely cause for the lack of a resonant chain between V1298 Tau’s planets, but currently our search for outer companions using SPHERE and Gaia observations can exclude only the presence of planets more massive than 2 MJ. Conclusions. The most plausible scenario for V1298 Tau’s formation is that the system formed by convergent migration and resonant trapping of planets born in a compact and plausibly massive disk. In the wake of their migration, V1298 Tau b and e would have left a dynamically excited protoplanetary disk, naturally creating the conditions for the later breaking of the resonant chain by planet-planet scattering.

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Section: Dynamical Excitation Of V1298 Tau B and Ementioning

confidence: 90%

The GAPS programme at TNG

Turrini,

Marzari,

Polychroni

et al. 2023

A&A

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“…The estimated shape of the initial Oort Cloud differs according to the role assigned to each process in its formation. For instance, Rickman et al (2023) show that even the orbit of the giant planets could be destabilized by scattering from the birth stellar cluster of the Sun. This highlights the importance of the presence of a disk in the Oort Cloud with regard to the process at work during its formation.…”

Section: Discussionmentioning

confidence: 99%

What long-period comets tell us about the Oort Cloud

Fouchard¹,

Higuchi²,

Itô³

2023

A&A

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Context. The Oort Cloud is located in the farthest outskirts of the Solar System, extending to a heliocentric distance of several tens of thousands of au, and remains the last region of the Solar System where no object has been detected. Thus, all our knowledge of the Oort Cloud has been deduced from the observed long-period comets that are thought to originate from it. Aims. We aimed to retrieve valuable information that might be hidden in the orbital distributions of the observed long-period comets. Such information will allow us to impose constraints not only on the present shape of the Oort Cloud but also on its initial shape 4.5 Gyr ago. This has direct implications for the scenario proposed for its formation. Methods. We used two different databases of long-period comets. First, we calculated the distribution of orbital elements that might carry valuable information about the shape of the Oort Cloud. Then, we compared the distribution with that obtained from two synthetic samples of observable comets. These samples correspond to two considerably different initial configurations: one is a disk model, where we consider a swarm of comets with orbits aligned to the ecliptic plane and with a cometary perihelion close to the giant planets. The other is an isotropic model, where we consider a fully isotropic and thermalized initial distribution of comets. Results. The comparison revealed that the databases contained several features that were in better agreement with the disk model than with the isotropic model. The Oort Cloud contained an initial disk of objects with perihelia close to the planetary region of the Solar System and aphelia extending out to roughly 20 000 au. Some parts of this disk likely remain in the present Solar System. However, the fit to the disk model is poor. The discrepancy between the observational and synthetic results indicates that some dynamical processes in the current Oort Cloud were not included in either model. Conclusions. This initial shape of the Oort Cloud implies that planetary scattering was crucial during its formation. In addition, the fact that some dynamical features are still detec table 4.5 Gyr after the cloud formation imposes constraints on the role of exosolar effects, such as giant molecular clouds, Galactic tides, and the stellar cluster surrounding the Solar System at the time of its formation.

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Exoplanet Occurrence Rates from Microlensing Surveys

Mróz,

Poleski

2024

Handbook of Exoplanets

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Breakdown of planetary systems in embedded clusters

Cited by 9 publications

References 57 publications

The GAPS programme at TNG

The GAPS programme at TNG

What long-period comets tell us about the Oort Cloud

Exoplanet Occurrence Rates from Microlensing Surveys

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