Jerry Xuan (Cambridge, now at Caltech), Mark Wyatt (Cambridge)

Link to \(\pi\) Men paper

2nd paper on planet-disk mutual inclinations

Planet | \(a\) | \(m \sin{I} \textrm{(b)}\ / m \textrm{(c)}\) | \(e\) |
---|---|---|---|

\(\pi\) Men b | \(3.31\) au | \(10.02\) \(M_{\rm{Jup}}\) | \(0.637\) |

\(\pi\) Men c | \(0.068\) au | \(4.8\) \(M_{\oplus}\) | \(<0.3\) |

**Fig 1.*** Illustration of the astrometric method, image from Kervella+2019.*

**Fig 2.*** \(I, \Omega, m\) for \(\pi\) Men b *

- \(49^\circ < \Delta I < 131^\circ\) at \(1\sigma\),
- \(28^\circ < \Delta I < 152^\circ\) at \(2\sigma\),
- \(9^\circ < \Delta I < 171^\circ\) at \(3\sigma\),

**Video 1.*** Nodal precession of the inner orbit around the outer orbit.*

- \(\pi\) Men c only transits 10-20% of the time from our N-body simulations.
- \(\pi\) Men c is likely misaligned with the stellar spin axis. This was confirmed by Kunovac HodÅ¾ic+2020.