Spectroscopic binaries with circular orbits.

Lucy, L. B.; Sweeney, Marvin A.

doi:10.1086/111159

Cited by 521 publications

(516 citation statements)

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“…The significance of these discrepancies is highlighted by the fact that our observations do not systematically deviate from the computed radial-velocity curves (Fig. 1) as do those of Margoni et al (1969).…”

Section: Observations and Orbital Solutionssupporting

confidence: 42%

“…As Table III shows, this mean orbital solution does not favorably compare with the one of Margoni et al (1969) in regard to the period, eccentricity, and barycentric velocity. The significance of these discrepancies is highlighted by the fact that our observations do not systematically deviate from the computed radial-velocity curves (Fig.…”

Section: Observations and Orbital Solutionsmentioning

confidence: 80%

See 1 more Smart Citation

Revised spectroscopic orbits for the metallic-line binaries ADS 8710 A and 41 Sextantis

Worek¹,

Zizka²,

Beardsley³

et al. 1986

PASP

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We present improved spectroscopic orbital elements for the metallic, double-line binary ADS 8710 A. We argue that it is not very likely that ADS 8710 A is an eclipsing binary as some researchers have suggested but we do in turn propose that it might possibly form a triple system with its closest optical companion, ADS 8710 B.We also verify the spectroscopic orbital solutions published by Worek, Beardsley, and King (1978) and Abt and Levy (1985) for the metallic, single-line binary 41 Sextantis.

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Section: Observations and Orbital Solutionssupporting

confidence: 42%

Section: Observations and Orbital Solutionsmentioning

confidence: 80%

Revised spectroscopic orbits for the metallic-line binaries ADS 8710 A and 41 Sextantis

Worek¹,

Zizka²,

Beardsley³

et al. 1986

PASP

View full text Add to dashboard Cite

show abstract

“…This bias is well known in the literature, and was first pointed out by Lucy & Sweeney (1971) in relation to short period binaries. The reason is that eccentricity is a positive definite value, and for large observational uncertainties and small eccentricities, any noise will inflate its value.…”

Section: Resultsmentioning

confidence: 68%

Revisiting the eccentricities of hot Jupiters

Husnoo¹,

Pont²,

Mazeh

et al. 2010

Proc. IAU

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Abstract. Most short period transiting exoplanets have circular orbits, as expected from an estimation of the circularisation timescale using classical tidal theory. Interestingly, a small number of short period transiting exoplanets seem to have orbits with a small eccentricity. Such systems are valuable as they may indicate that some key physics is missing from formation and evolution models. We have analysed the results of a campaign of radial velocity measurements of known transiting planets with the SOPHIE and HARPS spectrographs using Bayesian methods and obtained new constraints on the orbital elements of 12 known transiting exoplanets. We also reanalysed the radial velocity data for another 42 transiting systems and show that some of the eccentric orbits reported in the Literature are compatible with a circular orbit. As a result, we show that the systems with circular and eccentric orbits are clearly separated on a plot of the planetary mass versus orbital period. We also show that planets following the trend where heavier hot Jupiters have shorter orbital periods (the "mass-period relation" of hot Jupiters), also tend to have circular orbits, with no confirmed exception to this rule so far.

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“…Binary-star orbit modelling suffers from the same problem, as was discussed nearly forty years ago by Lucy & Sweeney (1971). They devised a simple F -test approach to determining the "false-alarm" probability that the fitted eccentricity would exceed a given value by chance if the true orbit is circular.…”

Section: Orbital Eccentricitiesmentioning

confidence: 99%

Statistical patterns in ground-based transit surveys

Cameron

2010

Proc. IAU

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Abstract. As the number of known transiting planets from ground-based surveys passes the 100 mark, it is becoming possible to perform meaningful statistical analyses on their physical properties. Caution is needed in their interpretation, because subtle differences in survey strategy can lead to surprising selection effects affecting the distributions of planetary orbital periods and radii, and of host-star metallicity. Despite these difficulties, the planetary mass-radius relation appears to conform more or less to theoretical expectations in the mass range from Saturns to super-Jupiters. The inflated radii of many hot Jupiters indicate that environmental factors can have a dramatic effect on planetary structure, and may even lead to catastrophic loss of the planetary envelope under extreme irradiation. High-precision radial velocities and secondaryeclipse timing are yielding eccentricity measurements of exquisite precision. They show some hot Jupiters to be in almost perfectly circular orbits, while others remain slightly but significantly eccentric.

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Spectroscopic binaries with circular orbits.

Cited by 521 publications

References 0 publications

Revised spectroscopic orbits for the metallic-line binaries ADS 8710 A and 41 Sextantis

Revised spectroscopic orbits for the metallic-line binaries ADS 8710 A and 41 Sextantis

Revisiting the eccentricities of hot Jupiters

Statistical patterns in ground-based transit surveys

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