The N2K consortium. III. Short-period planets orbiting HD 149143 and HD 109749

Debra A. Fischer, Gregory Laughlin, Geoffrey W. Marcy, R. Paul Butler, Steven S. Vogt, John A. Johnson, Gregory W. Henry, Chris McCarthy, Mark Ammons, Sarah Robinson, Jay Strader, Jeff A. Valenti, P. R. McCullough, David Charbonneau, Joshua Haislip, Heather A. Knutson, Daniel E. Reichart, Padric McGee, Berto Monard, Jason T. WrightShigeru Ida, Bun'Ei Sato, Dante Minniti

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

We report the detection of two short-period planets discovered at Keck Observatory. HD 149143 is a metal-rich G0 IV star with a planet of M sin i = 1.33MJ and an orbital radius of 0.053 AU. The best-fit Keplerian model has an orbital period, P = 4.072 days, semivelocity amplitude, K = 149.6 m s-1, and eccentricity, e = 0.016 ± 0.01. The host star is chromospherically inactive and metal-rich, with [Fe/H] = 0.26. Based on the Teff and stellar luminosity, we derive a stellar radius of 1.49 Rodot;. Photometric observations of HD 149143 were carried out using the automated photometric telescopes at Fairborn Observatory. HD 149143 is photometrically constant over the radial velocity period to 0.0003 ± 0.0002 mag, supporting the existence of the planetary companion. No transits were detected down to a photometric limit of approximately 0.02%, eliminating transiting planets with a variety of compositions and constraining the orbital inclination to less than 83°. A short-period planet was also detected around HD 109749, a G3 IV star. HD 109749 is chromospherically inactive, with [Fe/H] = 0.25 and a stellar radius of 1.24. The radial velocities for HD 109749 are modeled by a Keplerian with P = 5.24 days and K = 28.7 m s-1. The inferred planet mass is M sin i = 0.28MJ and the semimajor axis of this orbit is 0.0635 AU. Photometry of HD 109749 was obtained with the SMARTS consortium telescope, the PROMPT telescope, and by transitsearch.org observers in Adelaide and Pretoria. These observations did not detect a decrement in the brightness of the host star at the predicted ephemeris time, and they constrain the orbital inclination to less than 85° for gas giant planets with radii down to 0.7RJ.

Original languageEnglish
Pages (from-to)1094-1101
Number of pages8
JournalAstrophysical Journal
Volume637
Issue number2 I
DOIs
Publication statusPublished - 1 Feb 2006

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planets
planet
stars
orbitals
radii
telescopes
radial velocity
inclination
ephemeris time
observatories
gas giant planets
stellar luminosity
observatory
transit
eccentricity
metals
metal
photometry
brightness
luminosity

Keywords

  • Planetary systems
  • Stars: individual (HD 149143, HD 109749)

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Fischer, D. A., Laughlin, G., Marcy, G. W., Butler, R. P., Vogt, S. S., Johnson, J. A., ... Minniti, D. (2006). The N2K consortium. III. Short-period planets orbiting HD 149143 and HD 109749. Astrophysical Journal, 637(2 I), 1094-1101. https://doi.org/10.1086/498557
Fischer, Debra A. ; Laughlin, Gregory ; Marcy, Geoffrey W. ; Butler, R. Paul ; Vogt, Steven S. ; Johnson, John A. ; Henry, Gregory W. ; McCarthy, Chris ; Ammons, Mark ; Robinson, Sarah ; Strader, Jay ; Valenti, Jeff A. ; McCullough, P. R. ; Charbonneau, David ; Haislip, Joshua ; Knutson, Heather A. ; Reichart, Daniel E. ; McGee, Padric ; Monard, Berto ; Wright, Jason T. ; Ida, Shigeru ; Sato, Bun'Ei ; Minniti, Dante. / The N2K consortium. III. Short-period planets orbiting HD 149143 and HD 109749. In: Astrophysical Journal. 2006 ; Vol. 637, No. 2 I. pp. 1094-1101.
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abstract = "We report the detection of two short-period planets discovered at Keck Observatory. HD 149143 is a metal-rich G0 IV star with a planet of M sin i = 1.33MJ and an orbital radius of 0.053 AU. The best-fit Keplerian model has an orbital period, P = 4.072 days, semivelocity amplitude, K = 149.6 m s-1, and eccentricity, e = 0.016 ± 0.01. The host star is chromospherically inactive and metal-rich, with [Fe/H] = 0.26. Based on the Teff and stellar luminosity, we derive a stellar radius of 1.49 Rodot;. Photometric observations of HD 149143 were carried out using the automated photometric telescopes at Fairborn Observatory. HD 149143 is photometrically constant over the radial velocity period to 0.0003 ± 0.0002 mag, supporting the existence of the planetary companion. No transits were detected down to a photometric limit of approximately 0.02{\%}, eliminating transiting planets with a variety of compositions and constraining the orbital inclination to less than 83°. A short-period planet was also detected around HD 109749, a G3 IV star. HD 109749 is chromospherically inactive, with [Fe/H] = 0.25 and a stellar radius of 1.24. The radial velocities for HD 109749 are modeled by a Keplerian with P = 5.24 days and K = 28.7 m s-1. The inferred planet mass is M sin i = 0.28MJ and the semimajor axis of this orbit is 0.0635 AU. Photometry of HD 109749 was obtained with the SMARTS consortium telescope, the PROMPT telescope, and by transitsearch.org observers in Adelaide and Pretoria. These observations did not detect a decrement in the brightness of the host star at the predicted ephemeris time, and they constrain the orbital inclination to less than 85° for gas giant planets with radii down to 0.7RJ.",
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Fischer, DA, Laughlin, G, Marcy, GW, Butler, RP, Vogt, SS, Johnson, JA, Henry, GW, McCarthy, C, Ammons, M, Robinson, S, Strader, J, Valenti, JA, McCullough, PR, Charbonneau, D, Haislip, J, Knutson, HA, Reichart, DE, McGee, P, Monard, B, Wright, JT, Ida, S, Sato, BE & Minniti, D 2006, 'The N2K consortium. III. Short-period planets orbiting HD 149143 and HD 109749', Astrophysical Journal, vol. 637, no. 2 I, pp. 1094-1101. https://doi.org/10.1086/498557

The N2K consortium. III. Short-period planets orbiting HD 149143 and HD 109749. / Fischer, Debra A.; Laughlin, Gregory; Marcy, Geoffrey W.; Butler, R. Paul; Vogt, Steven S.; Johnson, John A.; Henry, Gregory W.; McCarthy, Chris; Ammons, Mark; Robinson, Sarah; Strader, Jay; Valenti, Jeff A.; McCullough, P. R.; Charbonneau, David; Haislip, Joshua; Knutson, Heather A.; Reichart, Daniel E.; McGee, Padric; Monard, Berto; Wright, Jason T.; Ida, Shigeru; Sato, Bun'Ei; Minniti, Dante.

In: Astrophysical Journal, Vol. 637, No. 2 I, 01.02.2006, p. 1094-1101.

Research output: Contribution to journalArticle

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T1 - The N2K consortium. III. Short-period planets orbiting HD 149143 and HD 109749

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AU - Laughlin, Gregory

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AU - Vogt, Steven S.

AU - Johnson, John A.

AU - Henry, Gregory W.

AU - McCarthy, Chris

AU - Ammons, Mark

AU - Robinson, Sarah

AU - Strader, Jay

AU - Valenti, Jeff A.

AU - McCullough, P. R.

AU - Charbonneau, David

AU - Haislip, Joshua

AU - Knutson, Heather A.

AU - Reichart, Daniel E.

AU - McGee, Padric

AU - Monard, Berto

AU - Wright, Jason T.

AU - Ida, Shigeru

AU - Sato, Bun'Ei

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N2 - We report the detection of two short-period planets discovered at Keck Observatory. HD 149143 is a metal-rich G0 IV star with a planet of M sin i = 1.33MJ and an orbital radius of 0.053 AU. The best-fit Keplerian model has an orbital period, P = 4.072 days, semivelocity amplitude, K = 149.6 m s-1, and eccentricity, e = 0.016 ± 0.01. The host star is chromospherically inactive and metal-rich, with [Fe/H] = 0.26. Based on the Teff and stellar luminosity, we derive a stellar radius of 1.49 Rodot;. Photometric observations of HD 149143 were carried out using the automated photometric telescopes at Fairborn Observatory. HD 149143 is photometrically constant over the radial velocity period to 0.0003 ± 0.0002 mag, supporting the existence of the planetary companion. No transits were detected down to a photometric limit of approximately 0.02%, eliminating transiting planets with a variety of compositions and constraining the orbital inclination to less than 83°. A short-period planet was also detected around HD 109749, a G3 IV star. HD 109749 is chromospherically inactive, with [Fe/H] = 0.25 and a stellar radius of 1.24. The radial velocities for HD 109749 are modeled by a Keplerian with P = 5.24 days and K = 28.7 m s-1. The inferred planet mass is M sin i = 0.28MJ and the semimajor axis of this orbit is 0.0635 AU. Photometry of HD 109749 was obtained with the SMARTS consortium telescope, the PROMPT telescope, and by transitsearch.org observers in Adelaide and Pretoria. These observations did not detect a decrement in the brightness of the host star at the predicted ephemeris time, and they constrain the orbital inclination to less than 85° for gas giant planets with radii down to 0.7RJ.

AB - We report the detection of two short-period planets discovered at Keck Observatory. HD 149143 is a metal-rich G0 IV star with a planet of M sin i = 1.33MJ and an orbital radius of 0.053 AU. The best-fit Keplerian model has an orbital period, P = 4.072 days, semivelocity amplitude, K = 149.6 m s-1, and eccentricity, e = 0.016 ± 0.01. The host star is chromospherically inactive and metal-rich, with [Fe/H] = 0.26. Based on the Teff and stellar luminosity, we derive a stellar radius of 1.49 Rodot;. Photometric observations of HD 149143 were carried out using the automated photometric telescopes at Fairborn Observatory. HD 149143 is photometrically constant over the radial velocity period to 0.0003 ± 0.0002 mag, supporting the existence of the planetary companion. No transits were detected down to a photometric limit of approximately 0.02%, eliminating transiting planets with a variety of compositions and constraining the orbital inclination to less than 83°. A short-period planet was also detected around HD 109749, a G3 IV star. HD 109749 is chromospherically inactive, with [Fe/H] = 0.25 and a stellar radius of 1.24. The radial velocities for HD 109749 are modeled by a Keplerian with P = 5.24 days and K = 28.7 m s-1. The inferred planet mass is M sin i = 0.28MJ and the semimajor axis of this orbit is 0.0635 AU. Photometry of HD 109749 was obtained with the SMARTS consortium telescope, the PROMPT telescope, and by transitsearch.org observers in Adelaide and Pretoria. These observations did not detect a decrement in the brightness of the host star at the predicted ephemeris time, and they constrain the orbital inclination to less than 85° for gas giant planets with radii down to 0.7RJ.

KW - Planetary systems

KW - Stars: individual (HD 149143, HD 109749)

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Fischer DA, Laughlin G, Marcy GW, Butler RP, Vogt SS, Johnson JA et al. The N2K consortium. III. Short-period planets orbiting HD 149143 and HD 109749. Astrophysical Journal. 2006 Feb 1;637(2 I):1094-1101. https://doi.org/10.1086/498557