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Tidal ribbons

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journal contribution
posted on 26.06.2019, 11:29 by Walter Dehnen, Hasanuddin
Tidal debris from Galactic satellites generally forms one-dimensional elongated streams, since nearby Galactic orbits have almost identical frequency ratios. We show that the situation is different for orbits close to the Galactic disc, whose vertical frequency Ωz is strongly amplitude dependent. As a consequence, stars stripped from a satellite obtain a range of values for Ωz and hence of frequency ratios, and spread into two dimensions, forming a ribbon-like structure with vertical extent comparable to that of the progenitor orbit. In integrals-of-motion space, tidal ribbons are clumps, which offer the best chance of detection and allows the determination of the Galactic potential vertically across the disc.

Funding

Research in Theoretical Astrophysics at Leicester is supported by STFC grant ST/M503605/1.

History

Citation

Monthly Notices of the Royal Astronomical Society, 2018, 479(4), pp. 4720–4726

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Physics and Astronomy

Version

VoR (Version of Record)

Published in

Monthly Notices of the Royal Astronomical Society

Publisher

Oxford University Press (OUP), Royal Astronomical Society

issn

0035-8711

eissn

1365-2966

Acceptance date

27/06/2018

Copyright date

2018

Available date

26/06/2019

Publisher version

https://academic.oup.com/mnras/article/479/4/4720/5046726

Language

en