NEID radial velocities of TOI-5126 and TOI-5398 Virtual Observatory Resource

Authors
  1. Radzom B.T.
  2. Dong J.
  3. Rice M.
  4. Wang X.-Y.
  5. Yee S.W.
  6. Fairnington T.R.,Petrovich C.
  7. Wang S.
  8. Published by
    CDS
Abstract

Despite decades of effort, the mechanisms by which the spin axis of a star and the orbital axes of its planets become misaligned remain elusive. In particular, it is of great interest whether the large spin-orbit misalignments observed are driven primarily by high-eccentricity migration-expected to have occurred for short-period, isolated planets-or reflect a more universal process that operates across systems with a variety of present-day architectures. Compact multiplanet systems offer a unique opportunity to differentiate between these competing hypotheses, as their tightly packed configurations preclude violent dynamical histories, including high-eccentricity migration, allowing them to trace the primordial disk plane. In this context, we report measurements of the sky-projected stellar obliquity ({lambda}) via the Rossiter-McLaughlin effect for two sub-Saturns in multiple- transiting systems: TOI-5126 b ({lambda}=1+/-48{deg}) and TOI-5398 b ({lambda}=-8.1_-6.3_^+5.3^{deg}). Both are spin-orbit aligned, joining a fast-growing group of just three other compact sub-Saturn systems, all of which exhibit spin-orbit alignment. In aggregate with archival data, our results strongly suggest that sub-Saturn systems are primordially aligned and become misaligned largely in the postdisk phase, as appears to be the case increasingly for other exoplanet populations.

Keywords
  1. radial-velocity
  2. exoplanets
  3. visible-astronomy
  4. spectroscopy
Bibliographic source Bibcode
2024AJ....168..116R
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/168/116
IVOA Identifier IVOID
ivo://CDS.VizieR/J/AJ/168/116

Access

IVOA Table Access TAP
https://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).

History

2025-02-06T14:27:59Z
Resource record created
2025-02-06T14:27:59Z
Created
2025-03-03T06:11:11Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr