PLATOSpec's first results: Planets WASP-35b and TOI-622b are on aligned orbits, and K2-237b is on a polar orbit

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F25%3A00641288" target="_blank" >RIV/67985815:_____/25:00641288 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14310/25:00142616 RIV/00216208:11320/25:10512551

Výsledek na webu

<a href="https://hdl.handle.net/11104/0371663" target="_blank" >https://hdl.handle.net/11104/0371663</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/202556115" target="_blank" >10.1051/0004-6361/202556115</a>

Jazyk výsledku

angličtina

Název v původním jazyce

PLATOSpec's first results: Planets WASP-35b and TOI-622b are on aligned orbits, and K2-237b is on a polar orbit

Popis výsledku v původním jazyce

The spin-orbit angle between a stellar spin axis and its planetary orbital axis is a key diagnostic of planetary migration pathways, yet the mechanisms shaping the observed spin-orbit distribution remain incompletely understood. Combining the spin-orbit angle with atmospheric measurements has emerged as a powerful method of studying exoplanets that showcases the synergy between ground-and space-based observations. We present the Rossiter-McLaughlin effect measurements of the projected spin-orbit angle (lambda) for three gaseous exoplanets using the newly commissioned PLATOSpec instrument on the E152 Telescope at La Silla Observatory. For WASP-35b, we determine lambda = 1(-18)(+19) deg, demonstrating PLATOSpec's capabilities through excellent agreement with HARPS-N literature data. We provide the first spin-orbit measurements for TOI-622b (lambda =4 +/- 12 deg, true spin-orbit angle psi = 16.1(-9.7)(+8.0) deg), revealing an aligned orbit consistent with quiescent disk migration. For K2-237b, we find lambda = 91 +/- 7 deg and psi = 90.5(-6.2)(+6.8) deg, indicating a nearly perfect polar orbit, which suggests a history consistent with disk-free migration, contrasting with previous studies inferring disk migration. TOI-622b populates a sparsely populated region of sub-Jovian planets with measured spin-orbit angles orbiting stars above the Kraft break, while K2-237b's polar configuration strengthens tentative evidence of preferential orbital orientations. All three systems are compelling targets for future atmospheric characterization, and these dynamical constraints will be vital for a comprehensive understanding of their formation and evolution.

Název v anglickém jazyce

PLATOSpec's first results: Planets WASP-35b and TOI-622b are on aligned orbits, and K2-237b is on a polar orbit

Popis výsledku anglicky

The spin-orbit angle between a stellar spin axis and its planetary orbital axis is a key diagnostic of planetary migration pathways, yet the mechanisms shaping the observed spin-orbit distribution remain incompletely understood. Combining the spin-orbit angle with atmospheric measurements has emerged as a powerful method of studying exoplanets that showcases the synergy between ground-and space-based observations. We present the Rossiter-McLaughlin effect measurements of the projected spin-orbit angle (lambda) for three gaseous exoplanets using the newly commissioned PLATOSpec instrument on the E152 Telescope at La Silla Observatory. For WASP-35b, we determine lambda = 1(-18)(+19) deg, demonstrating PLATOSpec's capabilities through excellent agreement with HARPS-N literature data. We provide the first spin-orbit measurements for TOI-622b (lambda =4 +/- 12 deg, true spin-orbit angle psi = 16.1(-9.7)(+8.0) deg), revealing an aligned orbit consistent with quiescent disk migration. For K2-237b, we find lambda = 91 +/- 7 deg and psi = 90.5(-6.2)(+6.8) deg, indicating a nearly perfect polar orbit, which suggests a history consistent with disk-free migration, contrasting with previous studies inferring disk migration. TOI-622b populates a sparsely populated region of sub-Jovian planets with measured spin-orbit angles orbiting stars above the Kraft break, while K2-237b's polar configuration strengthens tentative evidence of preferential orbital orientations. All three systems are compelling targets for future atmospheric characterization, and these dynamical constraints will be vital for a comprehensive understanding of their formation and evolution.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Astronomy & Astrophysics

ISSN

0004-6361

e-ISSN

1432-0746

Svazek periodika

702

Číslo periodika v rámci svazku

Oct.

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

11

Strana od-do

A266

Kód UT WoS článku

001604700600010

EID výsledku v databázi Scopus

2-s2.0-105024534823