New stellar encounters discovered in the second Gaia data release

@article{BailerJones2018NewSE,
  title={New stellar encounters discovered in the second Gaia data release},
  author={Coryn A. L. Bailer-Jones and Jan Rybizki and Ren{\'e} Andrae and Morgan Fouesneau},
  journal={Astronomy \& Astrophysics},
  year={2018}
}
Passing stars may play an important role in the evolution of our solar system. We search for close stellar encounters to the Sun among all 7.2 million stars in Gaia DR2 that have six-dimensional phase space data. We characterize encounters by integrating their orbits through a Galactic potential and propagating the correlated uncertainties via a Monte Carlo resampling. After filtering to remove spurious data, we find 694 stars that have median (over uncertainties) closest encounter distances… 
Unbound Close Stellar Encounters in the Solar Neighborhood
  • B. Hansen
  • Physics, Geology
    The Astronomical Journal
  • 2022
We present a catalog of unbound stellar pairs, within 100 pc of the Sun, that are undergoing close, hyperbolic, encounters. The data are drawn from the GAIA EDR3 catalog, and the limiting factors are
Tracing Stellar Close Encounters with Our Sun from GAIA DR2, LAMOST DR4, and RAVE DR5 Catalogues
Our Sun is surrounded by the Oort Cloud (in radius 0.5 pc) which can be perturbed by various external factors. One of those is the stellar close encounter with our Sun. This kind of perturbation can
A surprise in the updated list of stellar perturbers of long-period comet motion
Context. The second Gaia data release (Gaia DR2) provided us with the precise five-parameter astrometry for 1.3 billion of sources. As stars passing close to the Solar System are thought to influence
Analysis of Close Stellar Encounters with the Solar System
We consider 36 candidates for close (within 1 pc) encounters with the Solar system. These stars have been selected in accordance with the results of an analysis of their motion obtained by various
Plausible Home Stars of the Interstellar Object ‘Oumuamua Found in Gaia DR2
The first detected interstellar object 'Oumuamua that passed within 0.25au of the Sun on 2017 September 9 was presumably ejected from a stellar system. We use its newly determined non-Keplerian
Search for Stellar Flybys in the Sco-Cen OB Association with the Gaia DR2
High-contrast imaging studies of debris disks have revealed a significant diversity in their morphologies, including large-scale asymmetries. Theories involving stellar flybys, an external source of
A search for the origin of the interstellar comet 2I/Borisov
The discovery of the second interstellar object 2I/Borisov on 2019 August 30 raises the question of whether it was ejected recently from a nearby stellar system. Here we compute the asymptotic
New ultracool dwarf neighbours within 20 pc from Gaia DR2
  • R. Scholz
  • Physics
    Astronomy & Astrophysics
  • 2020
Aims. The Gaia data release 2 (DR2) contains > 6000 objects with parallaxes (Plx + 3 × e_Plx) > 50 mas, placing them within 20 pc from the Sun. Because the expected numbers based on extrapolating the
The Implications of Local Fluctuations in the Galactic Midplane for Dynamical Analysis in theGaiaEra
Orbital properties of stars, computed from their six-dimensional phase space measurements and an assumed Galactic potential, are used to understand the structure and evolution of the Galaxy. Stellar
Origin and Evolution of Long-period Comets
We develop an evolutionary model of the long-period comet (LPC) population, starting from their birthplace in a massive trans-Neptunian disk that was dispersed by migrating giant planets. Most comets
...
1
2
3
...

References

SHOWING 1-10 OF 32 REFERENCES
The completeness-corrected rate of stellar encounters with the Sun from the first Gaia data release
I report on close encounters of stars to the Sun found in the first Gaia data release (GDR1). Combining Gaia astrometry with radial velocities of around 320 000 stars drawn from various catalogues, I
Close encounters of the stellar kind
Stars which pass close to the Sun can perturb the Oort cloud, injecting comets into the inner solar system where they may collide with the Earth. Using van Leeuwen's re-reduction of the Hipparcos
Stellar encounters with the solar system
We continue our search, based on Hipparcos data, for stars which have encountered or will encounter the solar system (Garcia-Sanchez et al. [CITE]). Hipparcos parallax and proper motion data are
Searching for stars closely encountering with the solar system
Based on a new version of the Hipparcos catalog and currently available radial velocity data, we have searched for stars that either have encountered or will encounter the solar neighborhood within
Stellar Encounters with the Oort Cloud Based on Hipparcos Data
We have combined Hipparcos proper-motion and parallax data for nearby stars with ground-based radial velocity measurements to —nd stars that may have passed (or will pass) close enough to the Sun to
Stars outside the Hipparcos list closely encountering the Solar system
Based on currently available kinematic data, we have searched for stars outside the Hipparcos list that either closely encountered in the past or will encounter in the future the Solar system within
Searching for stars closely encountering with the solar system based on data from the Gaia DR1 and RAVE5 catalogues
We have searched for the stars that either encountered in the past or will encounter in the future with the Solar system closer than 2 pc. For this purpose, we took more than 216 000 stars with the
The Closest Known Flyby of a Star to the Solar System
Passing stars can perturb the Oort Cloud, triggering comet showers and potentially extinction events on Earth. We combine velocity measurements for the recently discovered, nearby, low-mass binary
Search for close stellar encounters with the solar system from data on nearby dwarfs
Trigonometric parallaxesmeasuredwith ground-based telescopes of the RECONS consortium as part of the CTIOPI program are used to search for stars that have either had an encounter with the solar
Effect of different stellar galactic environments on planetary discs – I. The solar neighbourhood and the birth cloud of the Sun
We have computed trajectories, distances and times of closest approaches to the Sun by stars in the solar neighbourhood with known position, radial velocity and proper motions. For this purpose, we
...
1
2
3
4
...