Perturbations of trans-Neptunian objects due to Gliese 710's passage
- Autor(en)
- Elke Pilat-Lohinger, Birgit Loibnegger, Maximilian Zimmermann, Daniel Hestroffer, Marc Fouchard, Melanie Saillenfest
- Abstrakt
Gaia observations (DR1-DR3) confirmed that the solar system will experience a close flyby of the K-type star Gliese 710 in about 1.3 Myrs. This 0.6 solar mass star will pass through the Oort cloud at a velocity of ~14.4 km/s, an inclination of ~150° with respect to the ecliptic and approach the Sun up to approximately 10,000 au (according to Gaia DR3 release). Earlier studies predicted flyby distances between 12000 and 4300 au (see e.g. Berski and Dybczynski 2016; Bailer-Jones et al. 2018; De la Fuente Marcos and De la Fuente Marcos 2018). The stellar passage will perturb the comets outside Neptune’s orbit, especially
objects entering the sphere of influence of Gliese 710.
Assuming that there are 10¹² Oort cloud objects between 100 to 100000 au from the Sun (resulting in a mean object density of 0.0002 comets/au³), it is obvious that numerical calculations of such a system are not within the realms of possibility even if a numerical code allows orbit calculation of tens of millions of (non-interacting) objects.- Organisation(en)
- Institut für Astrophysik
- Externe Organisation(en)
- Icm & Sorbonne University
- DOI
- https://doi.org/10.5194/epsc2024-1358
- Publikationsdatum
- 09-2024
- Peer-reviewed
- Ja
- ÖFOS 2012
- 103003 Astronomie, 103004 Astrophysik
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/ca206ed1-04c2-41cf-8d0d-f811504709d0