102 hot Jupiters isochrone analyse & stellar modeling Virtual Observatory Resource

Authors
  1. Hamer J.H.
  2. Schlaufman K.C.
  3. Published by
    CDS
Abstract

It has been shown that hot Jupiters systems with massive, hot stellar primaries exhibit a wide range of stellar obliquities. On the other hand, hot Jupiter systems with low-mass, cool primaries often have stellar obliquities close to zero. Efficient tidal interactions between hot Jupiters and the convective envelopes present in lower-mass main-sequence stars have been a popular explanation for these observations. If this explanation is accurate, then aligned systems should be older than misaligned systems. Likewise, the convective envelope mass of a hot Jupiter's host star should be an effective predictor of its obliquity. We derive homogeneous stellar parameters-including convective envelope masses-for hot Jupiter host stars with high-quality sky-projected obliquity inferences. Using a thin-disk stellar population's Galactic velocity dispersion as a relative age proxy, we find that hot Jupiter host stars with larger-than-median obliquities are older than hot Jupiter host stars with smaller-than-median obliquities. The relative age difference between the two populations is larger for hot Jupiter host stars with smaller-than-median fractional convective envelope masses and is significant at the 3.6{sigma} level. We identify stellar mass, not convective envelope mass, as the best predictor of stellar obliquity in hot Jupiter systems. The best explanation for these observations is that many hot Jupiters in misaligned systems arrived in the close proximity of their host stars long after their parent protoplanetary disks dissipated. The dependence of observed age offset on convective envelope mass suggests that tidal realignment contributes to the population of aligned hot Jupiters orbiting stars with convective envelopes.

Keywords
  1. exoplanets
  2. spectroscopy
  3. infrared-photometry
  4. visible-astronomy
  5. Wide-band photometry
  6. stellar-ages
  7. stellar-masses
  8. effective-temperature
  9. extinction
Bibliographic source Bibcode
2022AJ....164...26H
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/164/26
IVOA Identifier IVOID
ivo://CDS.VizieR/J/AJ/164/26
Document Object Identifer DOI
doi:10.26093/cds/vizier.51640026

Access

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http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/164/26
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/164/26
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/164/26
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https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/164/26/table1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/164/26/table1?

History

2022-11-07T06:33:24Z
Resource record created
2022-11-07T06:33:24Z
Created
2022-11-15T08:23:57Z
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