Exocomets in the 47 UMa System: Theoretical Simulations including Water Transport
arXiv:1811.09579 · doi:10.3847/1538-3881/aaeac7
Abstract
Motivated by ongoing discoveries of features (most likely) attributable to exocomets in various systems, this study examines the dynamics of possible comets around 47 UMa. Based on the assumption that most systems hosting planets should also harbor leftovers from planet formation processes, comets are thus also expected to exist in the system of 47 UMa. This system is known to host three Jupiter-type planets; however, based on stability analyses, additional terrestrial planets in stable orbits might also be able to exist, including planets in 47 UMa's habitable zone. Furthermore, we also consider a possible 'Hilda'-planet. The aim of our study is to explore the interaction of exocomets with the Jupiter-type planets in the system and examine the probability of cometary collisions with the planets, including possible Earth-mass planets located in the habitable zone. Moreover, we investigate the transport of water onto the Earth-mass planets, including quantitative estimates. It is found that the Earth-mass planets would be able to receive some water, but much less than currently present on Earth. We also checked if the comets form families, but no families were found. Finally, the capture of comets in close orbits and the possibility of small clouds formed when comets come too close to the star and disintegrate are also part of our work.
arXiv commentAccepted by The Astronomical Journal; 33 pages, 10 figures, 6 tables
References in corpus (23)
- Habitable Zones Around Main-Sequence Stars: New Estimates
- Origin of water in the inner Solar System: Planetesimals scattered inward during Jupiter and Saturn's rapid gas accretion
- A 40 Myr Old Gaseous Circumstellar Disk at 49 Ceti: Massive CO-Rich Comet Clouds at Young A-Type Stars
- Directly Determined Linear Radii and Effective Temperatures of Exoplanet Host Stars
- Origin of the Ocean on the Earth: Early Evolution of Water D/H in a Hydrogen-rich Atmosphere
- Target Selection for SETI: 1. A Catalog of Nearby Habitable Stellar Systems
- On the Ages of Exoplanet Host Stars
- Isotopic ratios of H, C, N, O, and S in comets C/2012 F6 (Lemmon) and C/2014 Q2 (Lovejoy)
- Likely Transiting Exocomets Detected by Kepler
- Injection of Oort Cloud Comets: The Fundamental Role of Stellar Perturbations
- High precision effective temperatures for 181 F--K dwarfs from line-depth ratios
- Stability of Terrestrial Planets in the Habitable Zone of Gl 777 A, HD 72659, Gl 614, 47 Uma and HD 4208
- A Bayesian Periodogram Finds Evidence for Three Planets in 47 Ursae Majoris
- The Librating Companions in HD 37124, HD 12661, HD 82943, 47 Uma and GJ 876: Alignment or Antialignment?
- A Dynamical Analysis of the 47 UMa Planetary System
- Could the 47 UMa Planetary System be a Second Solar System: predicting the Earth-like planets
- Realistic Detectability of Close Interstellar Comets
- Finding the imprints of stellar encounters in long period comets
- Asteroid flux towards circumprimary habitable zones in binary star systems: I. Statistical Overview
- Models of the formation of the planets in the 47 UMa system
- Bayesian evidence for the prevalence of waterworlds
- The influence of orbital resonances on the water transport to objects in the circumprimary habitable zone of binary star systems
- Case Studies of Exocomets in the System of HD 10180