New data and improved parameters for the extrasolar transiting planet OGLE-TR-56b

Guillermo Torres; Maciej Konacki; Dimitar D. Sasselov; Saurabh Jha

doi:10.1086/421286

New data and improved parameters for the extrasolar transiting planet OGLE-TR-56b

Guillermo Torres, Maciej Konacki, Dimitar D. Sasselov, Saurabh Jha

Research output: Contribution to journal › Article › peer-review

63 Scopus citations

Abstract

We report new spectroscopic observations with the Keck HIRES instrument of the recently discovered transiting planet OGLE-TR-56b. Our radial velocity measurements with errors of ∼100 m s^-1 show clear variations that are in excellent agreement with the phasing (period and epoch) derived from the OGLE transit photometry. Careful analysis of the spectral line bisectors, along with numerical simulations of blend scenarios, supports the argument for the planetary nature of the companion. The new data, combined with measurements from the previous season, allow an improved determination of the mass of the planet, M_p = (1.45 ± 0.23)M_Jup. All available OGLE photometry, including new measurements made during the 2003 season, have also been analyzed to derive an improved value for the planetary radius of R _p = (1.23 ± 0.16)R_Jup. We discuss the implications of these results for the theory of extrasolar planets.

Original language	English (US)
Pages (from-to)	1071-1075
Number of pages	5
Journal	Astrophysical Journal
Volume	609
Issue number	2 I
DOIs	https://doi.org/10.1086/421286
State	Published - Jul 10 2004
Externally published	Yes

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Binaries: elipsing
Planetary systems
Stars: low-mass, brown dwarfs
Techniques: radial velocities

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10.1086/421286

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@article{1e179af18fa9473b8702c91c04b31b73,

title = "New data and improved parameters for the extrasolar transiting planet OGLE-TR-56b",

abstract = "We report new spectroscopic observations with the Keck HIRES instrument of the recently discovered transiting planet OGLE-TR-56b. Our radial velocity measurements with errors of ∼100 m s-1 show clear variations that are in excellent agreement with the phasing (period and epoch) derived from the OGLE transit photometry. Careful analysis of the spectral line bisectors, along with numerical simulations of blend scenarios, supports the argument for the planetary nature of the companion. The new data, combined with measurements from the previous season, allow an improved determination of the mass of the planet, Mp = (1.45 ± 0.23)MJup. All available OGLE photometry, including new measurements made during the 2003 season, have also been analyzed to derive an improved value for the planetary radius of R p = (1.23 ± 0.16)RJup. We discuss the implications of these results for the theory of extrasolar planets.",

keywords = "Binaries: elipsing, Planetary systems, Stars: low-mass, brown dwarfs, Techniques: radial velocities",

author = "Guillermo Torres and Maciej Konacki and Sasselov, {Dimitar D.} and Saurabh Jha",

year = "2004",

month = jul,

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doi = "10.1086/421286",

language = "English (US)",

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journal = "Astrophysical Journal",

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TY - JOUR

T1 - New data and improved parameters for the extrasolar transiting planet OGLE-TR-56b

AU - Torres, Guillermo

AU - Konacki, Maciej

AU - Sasselov, Dimitar D.

AU - Jha, Saurabh

PY - 2004/7/10

Y1 - 2004/7/10

N2 - We report new spectroscopic observations with the Keck HIRES instrument of the recently discovered transiting planet OGLE-TR-56b. Our radial velocity measurements with errors of ∼100 m s-1 show clear variations that are in excellent agreement with the phasing (period and epoch) derived from the OGLE transit photometry. Careful analysis of the spectral line bisectors, along with numerical simulations of blend scenarios, supports the argument for the planetary nature of the companion. The new data, combined with measurements from the previous season, allow an improved determination of the mass of the planet, Mp = (1.45 ± 0.23)MJup. All available OGLE photometry, including new measurements made during the 2003 season, have also been analyzed to derive an improved value for the planetary radius of R p = (1.23 ± 0.16)RJup. We discuss the implications of these results for the theory of extrasolar planets.

AB - We report new spectroscopic observations with the Keck HIRES instrument of the recently discovered transiting planet OGLE-TR-56b. Our radial velocity measurements with errors of ∼100 m s-1 show clear variations that are in excellent agreement with the phasing (period and epoch) derived from the OGLE transit photometry. Careful analysis of the spectral line bisectors, along with numerical simulations of blend scenarios, supports the argument for the planetary nature of the companion. The new data, combined with measurements from the previous season, allow an improved determination of the mass of the planet, Mp = (1.45 ± 0.23)MJup. All available OGLE photometry, including new measurements made during the 2003 season, have also been analyzed to derive an improved value for the planetary radius of R p = (1.23 ± 0.16)RJup. We discuss the implications of these results for the theory of extrasolar planets.

KW - Binaries: elipsing

KW - Planetary systems

KW - Stars: low-mass, brown dwarfs

KW - Techniques: radial velocities

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UR - http://www.scopus.com/inward/citedby.url?scp=3242767687&partnerID=8YFLogxK

U2 - 10.1086/421286

DO - 10.1086/421286

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SN - 0004-637X

VL - 609

SP - 1071

EP - 1075

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2 I

ER -

New data and improved parameters for the extrasolar transiting planet OGLE-TR-56b

Abstract

All Science Journal Classification (ASJC) codes

Keywords

Access to Document

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