Astronomy15 papers
The Yarkovsky effect
IŽ
Ivana Milić Žitnik
All Reviews
AstronomyWorth Reading
intermediate
The specific property of motion of resonant asteroids with very slow Yarkovsky drift speeds
Ivana Milić Žitnik (2019)
- Published
- Apr 20, 2019
- Journal
- Monthly Notices of the Royal Astronomical Society · Vol. 486 · No. 2
- DOI
- 10.1093/mnras/stz874
At a GlanceAI
Numerical integrations reveal a drift-rate threshold below which asteroids “jump” quickly across Jupiter mean-motion resonances.
SummaryAI
This paper shows that asteroids with extremely small Yarkovsky semimajor-axis drift rates can traverse Jupiter’s mean-motion resonances faster than expected, particularly for strong resonances. Using large ensembles of long-term numerical integrations, it identifies a behavioral “breakpoint” near |da/dt| ≈ 7×10⁻⁵ au/Myr: below this value, average resonance-induced delays become negative, indicating accelerated crossing. The result matters for modeling how main-belt asteroids migrate through resonances and may affect interpretations of asteroid-family spreading (e.g., V-shape curvature) when resonances are involved.
Method SnapshotAI
Long-duration N-body numerical integrations with an imposed constant Yarkovsky semimajor-axis drift, measuring resonance crossing lead/lag statistics across multiple Jupiter MMRs.
BackgroundAI
Basic celestial mechanics of mean-motion resonances and the Yarkovsky effect in asteroid orbital evolution.
This paper has presented a new description on the orbital behavior of resonant asteroids with very small Yarkovsky drift speeds. The conclusion is the boundary value of da/dt in the motion of resonant main belt asteroids under the influence of the Yarkovsky effect is at |−7| ×10^(−5) au/Myr. Below this value, asteroids typically quickly jump across the mean motion resonances, and this is especially the case in strong resonances, such as 9:4, 8:3 and 13:6 with Jupiter.
— IŽ