English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Warm Jupiters lay out an excellent laboratory for testing models of planetformation and migration. Their separation from the host star makes tidalreprocessing of their orbits ineffective, which preserves the orbitalarchitectures that result from the planet-forming process. Among the measurableproperties, the orbital inclination with respect to the stellar rotationalaxis, stands out as a crucial diagnostic for understanding the migrationmechanisms behind the origin of close-in planets. Observational limitationshave made the procurement of spin-orbit measurements heavily biased toward hotJupiter systems. In recent years, however, high-precision spectroscopy hasbegun to provide obliquity measurements for planets well into the warm Jupiterregime. In this study, we present Rossiter-McLaughlin (RM) measurements of theprojected obliquity angle for the warm Jupiter TOI-677 b using ESPRESSO at theVLT. TOI-677 b exhibits an extreme degree of alignment ($\lambda = 0.3 \pm 1.3$deg), which is particularly puzzling given its significant eccentricity ($e\approx 0.45$). TOI-677 b thus joins a growing class of close-in giants thatexhibit large eccentricities and low spin-orbit angles, which is aconfiguration not predicted by existing models. We also present the detectionof a candidate outer brown dwarf companion on an eccentric, wide orbit ($e\approx 0.4$ and $P \approx 13$ yr). Using simple estimates, we show that thiscompanion is unlikely to be the cause of the unusual orbit of TOI-677 b.Therefore, it is essential that future efforts prioritize the acquisition of RMmeasurements for warm Jupiters.

Orbital alignment of the eccentric warm Jupiter TOI-677 b