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A catalogue of close encounter pairs

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A catalogue of close encounter pairs. / Feng, Fabo; Jones, Hugh R. A.; Tanvir, Tabassum S.

In: ArXiv, 17.07.2017.

Research output: Contribution to journalArticlepeer-review

Harvard

APA

Feng, F., Jones, H. R. A., & Tanvir, T. S. (2017). A catalogue of close encounter pairs. Manuscript submitted for publication.

Vancouver

Feng F, Jones HRA, Tanvir TS. A catalogue of close encounter pairs. ArXiv. 2017 Jul 17.

Author

Feng, Fabo ; Jones, Hugh R. A. ; Tanvir, Tabassum S. / A catalogue of close encounter pairs. In: ArXiv. 2017.

Bibtex

@article{abcde8e9ab9a47128e175f36c694c038,
title = "A catalogue of close encounter pairs",
abstract = "We provide a catalogue of pairs of stars whose periapses are less than 1pc within the past or future 100 Myr. We use astrometric data from TGAS, Hipparcos and radial velocity data from RAVE and XHIP to find the space motions and hence the initial conditions of 229, 441 stars in Galactic coordinates. We simulate the orbits of these stars and focus on the time, distance and velocity at periastron for 8149 pairs using the k-d tree algorithm to find nearest neighbors. We find an anisotropy in the directions of encounter pairs caused by the solar apex motion, indicating a role of peculiar motion imposing an anisotropic tidal force on planetary systems. We call this effect {"}kinematic tide{"}. Among the encounter pairs there are 4 encounters with the Solar System with periapses less than 1 pc and 96 pairs with periapses less than 0.1 pc. We also find 577 close encounters of stars which host planetary systems and/or debris disks. We discuss a range of uses for an encounter catalogue and present an example of how the time-varying network of stellar motions will be crucial for efficient interstellar travel between planetary systems. The catalogues are available at http://star.herts.ac.uk/pandora/cep1. ",
keywords = "astro-ph.SR, astro-ph.EP",
author = "Fabo Feng and Jones, {Hugh R. A.} and Tanvir, {Tabassum S.}",
year = "2017",
month = jul,
day = "17",
language = "English",
journal = "ArXiv",

}

RIS

TY - JOUR

T1 - A catalogue of close encounter pairs

AU - Feng, Fabo

AU - Jones, Hugh R. A.

AU - Tanvir, Tabassum S.

PY - 2017/7/17

Y1 - 2017/7/17

N2 - We provide a catalogue of pairs of stars whose periapses are less than 1pc within the past or future 100 Myr. We use astrometric data from TGAS, Hipparcos and radial velocity data from RAVE and XHIP to find the space motions and hence the initial conditions of 229, 441 stars in Galactic coordinates. We simulate the orbits of these stars and focus on the time, distance and velocity at periastron for 8149 pairs using the k-d tree algorithm to find nearest neighbors. We find an anisotropy in the directions of encounter pairs caused by the solar apex motion, indicating a role of peculiar motion imposing an anisotropic tidal force on planetary systems. We call this effect "kinematic tide". Among the encounter pairs there are 4 encounters with the Solar System with periapses less than 1 pc and 96 pairs with periapses less than 0.1 pc. We also find 577 close encounters of stars which host planetary systems and/or debris disks. We discuss a range of uses for an encounter catalogue and present an example of how the time-varying network of stellar motions will be crucial for efficient interstellar travel between planetary systems. The catalogues are available at http://star.herts.ac.uk/pandora/cep1.

AB - We provide a catalogue of pairs of stars whose periapses are less than 1pc within the past or future 100 Myr. We use astrometric data from TGAS, Hipparcos and radial velocity data from RAVE and XHIP to find the space motions and hence the initial conditions of 229, 441 stars in Galactic coordinates. We simulate the orbits of these stars and focus on the time, distance and velocity at periastron for 8149 pairs using the k-d tree algorithm to find nearest neighbors. We find an anisotropy in the directions of encounter pairs caused by the solar apex motion, indicating a role of peculiar motion imposing an anisotropic tidal force on planetary systems. We call this effect "kinematic tide". Among the encounter pairs there are 4 encounters with the Solar System with periapses less than 1 pc and 96 pairs with periapses less than 0.1 pc. We also find 577 close encounters of stars which host planetary systems and/or debris disks. We discuss a range of uses for an encounter catalogue and present an example of how the time-varying network of stellar motions will be crucial for efficient interstellar travel between planetary systems. The catalogues are available at http://star.herts.ac.uk/pandora/cep1.

KW - astro-ph.SR

KW - astro-ph.EP

M3 - Article

JO - ArXiv

JF - ArXiv

ER -