Asset Details

MbrlCatalogueTitleDetail

Do you wish to reserve the book?

The star HIP 41378 potentially misaligned with its cohort of long-period planets

by Akinsanmi, B , Dumusque, X , Barros, S C C , Grouffal, S , Llama, J , Rajpurohit, A S , Sousa, S G , Rice, M , Balsalobre-Ruza, O , Santos, N C , Kunovac, V , Palle, E , Seidel, J V , Wheatley, P J , Bourrier, V , Demangeon, O , Santerne, A , Isaacson, H , Dressing, C , Lillo-Box, J , Armstrong, C , Harada, C K , Mortier, A , Baliwal, S , Thomas, L , Bayliss, D , Turtelboom, E V , Crossfield, I J M , Kellermann, H , Udry, S , Giacalone, S , Sharma, R

in Extrasolar planets / Gas giant planets / Misalignment / Orbital resonances (celestial mechanics) / Planet formation / Planetary orbits / Planetary rotation / Planetary systems / Protoplanetary disks / Stellar rotation / Transit

2025

Yes Please

Hey, we have placed the reservation for you!

By the way, why not check out events that you can attend while you pick your title.

Oops! Something went wrong.

Looks like we were not able to place the reservation. Kindly try again later.

Are you sure you want to remove the book from the shelf?

The star HIP 41378 potentially misaligned with its cohort of long-period planets

2025

Confirm

Do you wish to request the book?

The star HIP 41378 potentially misaligned with its cohort of long-period planets

2025

Please be aware that the book you have requested cannot be checked out. If you would like to checkout this book, you can reserve another copy

How would you like to get it?

Submit

We have requested the book for you!

Your request is successful and it will be processed during the Library working hours. Please check the status of your request in My Requests.

Oops! Something went wrong.

Looks like we were not able to place your request. Kindly try again later.

Paper

The star HIP 41378 potentially misaligned with its cohort of long-period planets

Akinsanmi, B,

Dumusque, X,

Barros, S C C,

Grouffal, S,

Llama, J,

Rajpurohit, A S,

Sousa, S G,

Rice, M,

Balsalobre-Ruza, O,

Santos, N C,

Kunovac, V,

Palle, E,

Seidel, J V,

Wheatley, P J,

Bourrier, V,

Demangeon, O,

Santerne, A,

Isaacson, H,

Dressing, C,

Lillo-Box, J,

Armstrong, C,

Harada, C K,

Mortier, A,

Baliwal, S,

Thomas, L,

Bayliss, D,

Turtelboom, E V,

Crossfield, I J M,

Kellermann, H,

Udry, S,

Giacalone, S,

Sharma, R

2025

Overview

The obliquity between the stellar spin axis and the planetary orbit, detected via the Rossiter-McLaughlin (RM) effect, is a tracer of the formation history of planetary systems. While obliquity measurements have been extensively applied to hot Jupiters and short-period planets, they remain rare for cold and long-period planets due to observational challenges, particularly their long transit durations. We report the detection of the RM effect for the 19-hour-long transit of HIP 41378 f, a temperate giant planet on a 542-day orbit, observed through a worldwide spectroscopic campaign. We measure a slight projected obliquity of 21 \\(\\pm\\) 8 degrees and a significant 3D spin-orbit angle of 52 \\(\\pm\\) 6 degrees, based on the measurement of the stellar rotation period. HIP 41378 f is part of a 5-transiting planetary system with planets close to mean motion resonances. The observed misalignment likely reflects a primordial tilt of the stellar spin axis relative to the protoplanetary disk, rather than dynamical interactions. HIP 41378 f is the first non-eccentric long-period (P>100 days) planet observed with the RM effect, opening new constraints on planetary formation theories. This observation should motivate the exploration of planetary obliquities across a longer range of orbital distances through international collaboration.

Share this book

Add to My Shelf

Publisher

Cornell University Library, arXiv.org

Subject

Extrasolar planets

/ Gas giant planets

/ Misalignment

/ Orbital resonances (celestial mechanics)

/ Planet formation

/ Planetary orbits

/ Planetary rotation