A Tendency Toward Alignment in Single-star Warm-Jupiter Systems
Article
Article Title | A Tendency Toward Alignment in Single-star Warm-Jupiter Systems |
---|---|
ERA Journal ID | 1048 |
Article Category | Article |
Authors | Rice, Malena, Wang, Songhu, Wang, Xian-Yu, Stefánsson, Guđmundur, Isaacson, Howard, Howard, Andrew W., Logsdon, Sarah E., Schweiker, Heidi, Dai, Fei, Brinkman, Casey, Giacalone, Steven and Holcomb, Rae |
Journal Title | The Astronomical Journal |
Journal Citation | 164 (3) |
Article Number | 104 |
Number of Pages | 15 |
Year | 2022 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-6256 |
1538-3881 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/1538-3881/ac8153 |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-3881/ac8153 |
Abstract | The distribution of spin–orbit angles for systems with wide-separation, tidally detached exoplanets offers a unique constraint on the prevalence of dynamically violent planetary evolution histories. Tidally detached planets provide a relatively unbiased view of the primordial stellar obliquity distribution, as they cannot tidally realign within the system lifetime. We present the third result from our Stellar Obliquities in Long-period Exoplanet Systems (SOLES) survey: a measurement of the Rossiter–McLaughlin effect across two transits of the tidally detached warm Jupiter TOI-1478 b with the WIYN/NEID and Keck/HIRES spectrographs, revealing a sky-projected spin–orbit angle $\lambda ={6.2}_{-5.5}^{+5.9^\circ} $. Combining this new measurement with the full set of archival obliquity measurements, including two previous constraints from the SOLES survey, we demonstrate that, in single-star systems, tidally detached warm Jupiters are preferentially more aligned than closer-orbiting hot Jupiters. This finding has two key implications: (1) planets in single-star systems tend to form within aligned protoplanetary disks, and (2) warm Jupiters form more quiescently than hot Jupiters, which, in single-star systems, are likely perturbed into a misaligned state through planet–planet interactions in the post-disk-dispersal phase. We also find that lower-mass Saturns span a wide range of spin–orbit angles, suggesting a prevalence of planet–planet scattering and/or secular mechanisms in these systems. |
Keywords | Jupiter; Single-star |
ANZSRC Field of Research 2020 | 5101. Astronomical sciences |
Byline Affiliations | Massachusetts Institute of Technology, United States |
Yale University, United States | |
Indiana University, United States | |
Chinese Academy of Sciences, China | |
University of Chinese Academy of Sciences, China | |
Princeton University, United States | |
University of California Berkeley, United States | |
Centre for Astrophysics | |
California Institute of Technology (Caltech), United States | |
NSF's National Optical Infrared Astronomy Research Laboratory (NOIRLab), United States | |
Division of Geological and Planetary Sciences, United States | |
University of Hawaii, United States | |
University of California, United States |
https://research.usq.edu.au/item/z029w/a-tendency-toward-alignment-in-single-star-warm-jupiter-systems
Download files
47
total views19
total downloads1
views this month1
downloads this month