HD 110067 c has an aligned orbit: Measuring the Rossiter-McLaughlin effect inside a resonant multi-planet system with ESPRESSO

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F24%3A00587838" target="_blank" >RIV/67985815:_____/24:00587838 - isvavai.cz</a>

Result on the web

<a href="https://hdl.handle.net/11104/0354935" target="_blank" >https://hdl.handle.net/11104/0354935</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/202450570" target="_blank" >10.1051/0004-6361/202450570</a>

Result language

angličtina

Original language name

HD 110067 c has an aligned orbit: Measuring the Rossiter-McLaughlin effect inside a resonant multi-planet system with ESPRESSO

Original language description

Planetary systems in mean motion resonances hold a special place among the planetary population. They allow us to study planet formation in great detail as dissipative processes are thought to have played an important role in their existence. Additionally, planetary masses in bright resonant systems can be independently measured via both radial velocities and transit timing variations. In principle, they also allow us to quickly determine the inclination of all planets in the system since, for the system to be stable, they are likely all in coplanar orbits. To describe the full dynamical state of the system, we also need the stellar obliquity, which provides the orbital alignment of a planet with respect to the spin of its host star and can be measured thanks to the Rossiter-McLaughlin effect. It was recently discovered that HD 110067 harbors a system of six sub-Neptunes in resonant chain orbits. We here analyze an ESPRESSO high-resolution spectroscopic time series of HD 110067 during the transit of planet c. We find the orbit of HD 110067 c to be well aligned, with a sky-projected obliquity of lambda =6(-26)(+24) deg. This result indicates that the current architecture of the system was reached through convergent migration without any major disruptive events. Finally, we report transit-timing variation in this system as we find a significant offset of 19 +/- 4 min in the center of the transit compared to the published ephemeris.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

<a href="/en/project/GF22-30516K" target="_blank" >GF22-30516K: Superflares: Their origins and connection with planets</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

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

Name of the periodical

Astronomy & Astrophysics

ISSN

0004-6361

e-ISSN

1432-0746

Volume of the periodical

687

Issue of the periodical within the volume

July

Country of publishing house

FR - FRANCE

Number of pages

9

Pages from-to

L2

UT code for WoS article

001262731800010

EID of the result in the Scopus database

2-s2.0-85196967185