Evidence for Primordial Alignment II: Insights from Stellar Obliquity Measurements for Hot Jupiters in Compact Multiplanet Systems
arXiv:2503.03745 · doi:10.3847/1538-3881/ad9dd5
Abstract
A significant fraction of hot Jupiters have orbital axes misaligned with their host stars' spin axes. The large stellar obliquities of these giants have long been considered potential signatures of high-eccentricity migration, which is expected to clear out any nearby planetary companions. This scenario requires that only isolated hot Jupiters be spin-orbit misaligned while those with nearby companions, which must have more quiescent histories, maintain low-obliquity orbits, assuming they formed aligned within their primordial protoplanetary disks. Investigations of this stellar obliquity-companionship connection, however, have been severely limited by the lack of hot Jupiters found in compact multi-planet systems. Here we present the sky-projected stellar obliquity () of a hot Jupiter with a nearby inner companion recently discovered by NASA's Transiting Exoplanet Survey Satellite: TOI-5143 c. Specifically, we utilize the Doppler shadow caused by the planet's transit, enabled by the Rossiter-McLaughlin (RM) effect, to find that the planet is aligned with . Of the exoplanets with RM measurements, TOI-5143 c becomes just the third hot Jupiter with a nearby companion, and is part of the 19th compact multi-planet single-star system, with an RM measurement. The spin-orbit alignment of these 19 systems provides strong support for primordial alignment, and thus implies that large obliquities are gained primarily due to post-disk dynamical interactions such as those inherent to high-eccentricity migration. As such, the observed spin-orbit alignment of hot Jupiters with nearby companions affirms that some fraction of these giants instead have quiescent origins.
14 pages, 4 figures, published to the Astronomical Journal at https://iopscience.iop.org/article/10.3847/1538-3881/ad9dd5
References in corpus (89)
- SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
- Array Programming with NumPy
- Astropy: A Community Python Package for Astronomy
- The NumPy array: a structure for efficient numerical computation
- Gaia Data Release 2. Summary of the contents and survey properties
- Gaia Data Release 3: Summary of the content and survey properties
- The Transiting Exoplanet Survey Satellite
- Binary companions of evolved stars in APOGEE DR14: Search method and catalog of ~5,000 companions
- MESA Isochrones and Stellar Tracks (MIST). I: Solar-Scaled Models
- MESA Isochrones and Stellar Tracks (MIST) 0: Methods for the construction of stellar isochrones
- Shrinking binary and planetary orbits by Kozai cycles with tidal friction
- Kepler Presearch Data Conditioning II - A Bayesian Approach to Systematic Error Correction
- Fast and scalable Gaussian process modeling with applications to astronomical time series
- Dynamical Outcomes of Planet-Planet Scattering
- Efficient, uninformative sampling of limb darkening coefficients for two-parameter laws
- The Occurrence and Architecture of Exoplanetary Systems
- The Eccentric Kozai-Lidov Effect and Its Applications
- Kepler Presearch Data Conditioning I - Architecture and Algorithms for Error Correction in Kepler Light Curves
- Hot Stars with Hot Jupiters Have High Obliquities
- Planet Migration and Binary Companions: the case of HD 80606b
- Obliquities of Hot Jupiter host stars: Evidence for tidal interactions and primordial misalignments
- Origins of Hot Jupiters
- Homogeneous studies of transiting extrasolar planets. IV. Thirty systems with space-based light curves
- Secular Chaos and the Production of Hot Jupiters
- The TESS Objects of Interest Catalog from the TESS Prime Mission
- Stellar Spin-Orbit Misalignment in a Multiplanet System
- WASP-47: A Hot Jupiter System with Two Additional Planets Discovered by K2
- Evidence of Possible Spin-Orbit Misalignment Along the Line of Sight in Transiting Exoplanet Systems
- On Galactic density modeling in the presence of dust extinction
- Kepler constraints on planets near hot Jupiters
- Transit Least Squares: Optimized transit detection algorithm to search for periodic transits of small planets
- Revisited Mass-Radius relations for exoplanets below 120 Earth masses
- Wotan: Comprehensive time-series de-trending in Python
- Misaligned spin-orbit in the XO-3 planetary system?
- exoplanet: Gradient-based probabilistic inference for exoplanet data & other astronomical time series
- Warm Jupiters are less lonely than hot Jupiters: close neighbours
- A Guide to Realistic Uncertainties on Fundamental Properties of Solar-Type Exoplanet Host Stars
- Line-profile tomography of exoplanet transits I: The Doppler shadow of HD 189733b
- Seven transiting hot-Jupiters from WASP-South, Euler and TRAPPIST: WASP-47b, WASP-55b, WASP-61b, WASP-62b, WASP-63b, WASP-66b & WASP-67b
- Low stellar obliquities in compact multiplanet systems
- Star-Disc-Binary Interactions in Protoplanetary Disc Systems and Primordial Spin-Orbit Misalignments
- The destruction of inner planetary systems during high-eccentricity migration of gas giants
- Planet-Planet Eclipse and the Rossiter-McLaughlin Effect of a Multiple Transiting System: Joint Analysis of the Subaru Spectroscopy and the Kepler Photometry
- The Rossiter-McLaughlin effect in Exoplanet Research
- A Preponderance of Perpendicular Planets
- The spin axes orbital alignment of both stars within the eclipsing binary system V1143Cyg using the Rossiter-McLaughlin effect
- A UBV Photometric Survey of the Kepler Field
- A comprehensive radial velocity error budget for next generation Doppler spectrometers
- A Versatile Technique to Enable sub-milli-Kelvin Instrument Stability for Precise Radial Velocity Measurements: Tests with the Habitable-zone Planet Finder
- Origins of Hot Jupiters from the Stellar Obliquity Distribution
- Limits on the Spin-Orbit Angle and Atmospheric Escape for the 22 Myr-old Planet AU Mic b
- TESS spots a hot Jupiter with an inner transiting Neptune
- A backward-spinning star with two coplanar planets
- Evidence for Hidden Nearby Companions to Hot Jupiters
- A Tendency Toward Alignment in Single-Star Warm Jupiter Systems
- Secular chaos and its application to Mercury, hot Jupiters, and the organization of planetary systems
- Kepler-730: A hot Jupiter system with a close-in, transiting, Earth-sized planet
- Secular dynamics of multiplanet systems: implications for the formation of hot and warm Jupiters via high-eccentricity migration
- Stellar Spin-Orbit Alignment for Kepler-9, a Multi-transiting Planetary system with Two Outer Planets Near 2:1 Resonance
- Overview of the spectrometer optical fiber feed for the Habitable-zone Planet Finder
- A low stellar obliquity for WASP-47, a compact multiplanet system with a hot Jupiter and an ultra-short period planet
- Ponderings on the Possible Preponderance of Perpendicular Planets
- Obliquities of Exoplanet Host Stars: 19 New and Updated Measurements, and Trends in the Sample of 205 Measurements
- The warm Neptunes around HD 106315 have low stellar obliquities
- The Aligned Orbit of WASP-148b, the Only Known Hot Jupiter with a Nearby Warm Jupiter Companion, from NEID and HIRES
- The Aligned Orbit of the Eccentric Warm Jupiter K2-232b
- K2-290: a warm Jupiter and a mini-Neptune in a triple-star system
- An Aligned Orbit for the Young Planet V1298 Tau b
- The Discovery of a Planetary Companion Interior to Hot Jupiter WASP-132 b
- A pair of warm giant planets near the 2:1 mean motion resonance around the K-dwarf star TOI-2202
- Stellar Obliquities in Long-period Exoplanet Systems (SOLES) I: The Spin-Orbit Alignment of K2-140 b
- Discovery and characterization of the exoplanets WASP-148b and c. A transiting system with two interacting giant planets
- TESS spots a mini-neptune interior to a hot saturn in the TOI-2000 system
- Validation of TESS exoplanet candidates orbiting solar analogues in the all-sky PLATO input catalogue
- The well-aligned orbit of WASP-84b: evidence for disc migration
- Photometric Follow-up Observations of the Transiting Neptune-Mass Planet GJ 436b
- The obliquity of HIP 67522 b: a 17 Myr old transiting hot Jupiter-sized planet
- TESS Investigation -- Demographics of Young Exoplanets (TI-DYE) II: a second giant planet in the 17-Myr system HIP 67522
- TOI-942b: A Prograde Neptune in a ~60 Myr old Multi-transiting System
- NEID Rossiter-McLaughlin Measurement of TOI-1268b: A Young Warm Saturn Aligned with Its Cool Host Star
- The Orbital Architecture of Qatar-6: A Fully Aligned 3-Body System?
- A hot super-Earth planet in the WASP-84 planetary system
- TOI-1408: Discovery and Photodynamical Modeling of a Small Inner Companion to a Hot Jupiter Revealed by TTVs
- Evidence for Primordial Alignment: Insights from Stellar Obliquity Measurements for Compact Sub-Saturn Systems
- TOI-1859b: A 64-Day Warm Jupiter on an Eccentric and Misaligned Orbit
- The Spin-Orbit Misalignment of TOI-1842b: The First Measurement of the Rossiter-McLaughlin Effect for a Warm Sub-Saturn around a Massive Star
- The chaotic history of the retrograde multi-planet system in K2-290A driven by distant stars
- Stable fiber-illumination for extremely precise radial velocities with NEID
- The PFS view of TOI-677 b: A spin-orbit aligned warm Jupiter in a dynamically hot system