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Cited by 121Stellar, planetary, and galactic studiesAstro and Planetary ScienceAstronomy and Astrophysical Research

HD 285507b: AN ECCENTRIC HOT JUPITER IN THE HYADES OPEN CLUSTER

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Quinn, Samuel N., White, Russel J., Latham, David W., Buchhave, Lars A., Torres, Guillermo, Stefanik, Robert P., Berlind, Perry, Bieryla, Allyson +5 more·2014·The Astrophysical Journal
DOI 10.1088/0004-637x/787/1/27
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Abstract

We report the discovery of the first hot Jupiter in the Hyades open cluster. HD 285507b orbits a V = 10.47 K4.5V dwarf ( M * = 0.734 M ☉ ; R * = 0.656 R ☉ ) in a slightly eccentric ( ) orbit with a period of days. The induced stellar radial velocity corresponds to a minimum companion mass of M P sin i = 0.917 ± 0.033 M Jup . Line bisector spans and stellar activity measures show no correlation with orbital phase, and the radial velocity amplitude is independent of wavelength, supporting the conclusion that the variations are caused by a planetary companion. Follow-up photometry indicates with high confidence that the planet does not transit. HD 285507b joins a small but growing list of planets in open clusters, and its existence lends support to a planet formation scenario in which a high stellar space density does not inhibit giant planet formation and migration. We calculate the circularization timescale for HD 285507b to be larger than the age of the Hyades, which may indicate that this planet's non-zero eccentricity is the result of migration via interactions with a third body. We also demonstrate a significant difference between the eccentricity distributions of hot Jupiters that have had time to tidally circularize and those that have not, which we interpret as evidence against Type II migration in the final stages of hot Jupiter formation. Finally, the dependence of the circularization timescale on the planetary tidal quality factor, Q P , allows us to constrain the average value for hot Jupiters to be .

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  • Quinn et al. (2014) compared stellar ages to hot Jupiters' tidal circularization timescales and found that those with ages longer than the circularization timescale had significantly larger eccentricities.

    “Quinn et al. (2014) compared stellar ages to hot Jupiters' tidal circularization timescales and found that those with ages longer than the circularization timescale had significantly larger eccentricities.”

    From Origins of Hot Jupiters (2018) · cites this paper as Quinn et al. (2014)

    The Summary and Conclusions states the opposite relationship: hot Jupiters whose ages exceed their circularization timescales have mostly circular orbits, while those whose timescales exceed their ages show a range of eccentricities. The Figure 5 caption reports a statistically significant difference between the two groups, but not in the direction claimed. (LLM, conf=0.93)

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  • Hot Jupiters have recently been discovered in young clusters, including two hot Jupiters with 2 and 4 day orbital periods in the 800 Myr Beehive cluster and HD 285507 b, a 6-day hot Jupiter with e = 0.09 ± 0.02 in the 600 Myr Hyades cluster.

    “Hot Jupiters have recently been discovered in young clusters, including two hot Jupiters with 2 and 4 day orbital periods in the metal-rich 800 Myr Beehive cluster (Quinn et al. 2012) and HD 285507 b, an 6-day hot Jupiter with e = 0 . 09 ± 0 . 02 in the 600 Myr metal-rich Hyades cluster (Quinn et al. 2014).”

    From Origins of Hot Jupiters (2018) · cites this paper as Quinn et al. 2014

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Authors
Quinn, S. N., White, R. J., Latham, D. W., Buchhave, L. A., Torres, G., Stefanik, R. P., Berlind, P., Bieryla, A., Calkins, M. C., Esquerdo, G. A., Fűrész, G., Geary, J. C., & Szentgyorgyi, A. H.
Affiliations
  • Georgia State University (US)
  • Center for Astrophysics Harvard & Smithsonian (US)
  • University of Copenhagen (DK)
ORCID
Venue
The Astrophysical Journal
Publisher
American Astronomical Society
Published
2014-04-30
Volume
787
Issue
1
Pages
27
ISSN
  • 0004-637X (ISSN-L)
  • 1538-4357
DOI
10.1088/0004-637x/787/1/27
OpenAlex
W2131323222
Cited by
121
References
4
Citations by year
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FWCI
7.37
Type
journal article
Language
en
Open access
Licence
Locations
  • The Astrophysical Journal (publishedVersion)
  • arXiv (Cornell University) (publishedVersion)
  • Research at the University of Copenhagen (University of Copenhagen) (publishedVersion, other-oa)
  • arXiv (Cornell University)
Funders
  • National Science Foundation (1007992, 1051030)
  • Smithsonian Institution
  • National Aeronautics and Space Administration (NNX11AC32G, NNX11AB99A)
  • Dartmouth College
  • Smithsonian Astrophysical Observatory
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astro and Planetary Science
  • Physical Sciences › Physics and Astronomy › Instrumentation › Astronomy and Astrophysical Research
Keywords
hot Jupiters, Hyades open cluster, radial velocity variations, stellar activity, non-transiting planets, tidal circularization, type II migration, tidal quality factor

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