Xo-2b: Transiting hot jupiter in a metal-rich common proper motion binary

Christopher J. Burke; P. R. McCullough; Jeff A. Valenti; Christopher M. Johns-Krull; Kenneth A. Janes; J. N. Heasley; F. J. Summers; J. E. Stys; R. Bissinger; Michael L. Fleenor; Cindy N. Foote; Enrique García-Melendo; Bruce L. Gary; P. J. Howell; F. Mallia; G. Masi; B. Taylor; T. Vanmunster

doi:10.1086/523087

Xo-2b: Transiting hot jupiter in a metal-rich common proper motion binary

Christopher J. Burke^*, P. R. McCullough, Jeff A. Valenti, Christopher M. Johns-Krull, Kenneth A. Janes, J. N. Heasley, F. J. Summers, J. E. Stys, R. Bissinger, Michael L. Fleenor, Cindy N. Foote, Enrique García-Melendo, Bruce L. Gary, P. J. Howell, F. Mallia, G. Masi, B. Taylor, T. Vanmunster

^*Corresponding author for this work

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

111 Citations (Scopus)

Abstract

We report on a V = 11.2 early K dwarf, XO-2 (GSC 03413-00005), that hosts aR_p = 0.98±^0.03 _0.01R_j,M _p = 0.57 ± 0.06 M_J transiting extrasolar planet, XO-2b, with an orbital period of 2.615857 ±0.000005 days. XO-2 has high metallicity, [Fe/H] = 0.45 ±0.02, high proper motion, μ_tot = 157 mas yr^-1, and a common proper motion stellar companion with 31″ separation. The two stars are nearly identical twins, with very similar spectra and apparent magnitudes. Due to the high metallicity, these early K dwarf stars have amass and radius close to solar, M* = 0.98 ± 0.02 _M⊙ and R* = 0.97±^C.02 _C.01 R_⊙The high proper motion of XO-2 results from an eccentric orbit (Galactic pericenter, R_per < 4 kpc) well confined to the Galactic disk (Z_max ∼ 100 pc). In addition, the phase-space position of XO-2 is near the Hercules dynamical stream, which points to an origin of XO-2 in the metal-rich, inner thin disk and subsequent dynamical scattering into the solar neighborhood. We describe an efficient Markov chain Monte Carlo algorithm for calculating the Bayesian posterior probability of the system parameters from a transit light curve.

Original language	English
Pages (from-to)	2115-2128
Number of pages	14
Journal	Astrophysical Journal
Volume	671
Issue number	2
DOIs	https://doi.org/10.1086/523087
Publication status	Published - 20 Dec 2007
Externally published	Yes

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Burke, C. J., McCullough, P. R., Valenti, J. A., Johns-Krull, C. M., Janes, K. A., Heasley, J. N., Summers, F. J., Stys, J. E., Bissinger, R., Fleenor, M. L., Foote, C. N., García-Melendo, E., Gary, B. L., Howell, P. J., Mallia, F., Masi, G., Taylor, B., & Vanmunster, T. (2007). Xo-2b: Transiting hot jupiter in a metal-rich common proper motion binary. Astrophysical Journal, 671(2), 2115-2128. https://doi.org/10.1086/523087

@article{dc1943c3ce8e4ec5abf37af879c7a5ec,

title = "Xo-2b: Transiting hot jupiter in a metal-rich common proper motion binary",

abstract = "We report on a V = 11.2 early K dwarf, XO-2 (GSC 03413-00005), that hosts aRp = 0.98±0.03 0.01Rj,M p = 0.57 ± 0.06 MJ transiting extrasolar planet, XO-2b, with an orbital period of 2.615857 ±0.000005 days. XO-2 has high metallicity, [Fe/H] = 0.45 ±0.02, high proper motion, μtot = 157 mas yr-1, and a common proper motion stellar companion with 31″ separation. The two stars are nearly identical twins, with very similar spectra and apparent magnitudes. Due to the high metallicity, these early K dwarf stars have amass and radius close to solar, M* = 0.98 ± 0.02 M⊙ and R* = 0.97±C.02 C.01 R⊙The high proper motion of XO-2 results from an eccentric orbit (Galactic pericenter, Rper < 4 kpc) well confined to the Galactic disk (Zmax ∼ 100 pc). In addition, the phase-space position of XO-2 is near the Hercules dynamical stream, which points to an origin of XO-2 in the metal-rich, inner thin disk and subsequent dynamical scattering into the solar neighborhood. We describe an efficient Markov chain Monte Carlo algorithm for calculating the Bayesian posterior probability of the system parameters from a transit light curve.",

keywords = "Binaries: eclipsing, Planetary systems, Stars: individual (GSC 34130-0005), Techniques: photometric, Techniques: radial velocities",

author = "Burke, {Christopher J.} and McCullough, {P. R.} and Valenti, {Jeff A.} and Johns-Krull, {Christopher M.} and Janes, {Kenneth A.} and Heasley, {J. N.} and Summers, {F. J.} and Stys, {J. E.} and R. Bissinger and Fleenor, {Michael L.} and Foote, {Cindy N.} and Enrique Garc{\'i}a-Melendo and Gary, {Bruce L.} and Howell, {P. J.} and F. Mallia and G. Masi and B. Taylor and T. Vanmunster",

year = "2007",

month = dec,

day = "20",

doi = "10.1086/523087",

language = "English",

volume = "671",

pages = "2115--2128",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

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}

Burke, CJ, McCullough, PR, Valenti, JA, Johns-Krull, CM, Janes, KA, Heasley, JN, Summers, FJ, Stys, JE, Bissinger, R, Fleenor, ML, Foote, CN, García-Melendo, E, Gary, BL, Howell, PJ, Mallia, F, Masi, G, Taylor, B & Vanmunster, T 2007, 'Xo-2b: Transiting hot jupiter in a metal-rich common proper motion binary', Astrophysical Journal, vol. 671, no. 2, pp. 2115-2128. https://doi.org/10.1086/523087

TY - JOUR

T1 - Xo-2b

T2 - Transiting hot jupiter in a metal-rich common proper motion binary

AU - Burke, Christopher J.

AU - McCullough, P. R.

AU - Valenti, Jeff A.

AU - Johns-Krull, Christopher M.

AU - Janes, Kenneth A.

AU - Heasley, J. N.

AU - Summers, F. J.

AU - Stys, J. E.

AU - Bissinger, R.

AU - Fleenor, Michael L.

AU - Foote, Cindy N.

AU - García-Melendo, Enrique

AU - Gary, Bruce L.

AU - Howell, P. J.

AU - Mallia, F.

AU - Masi, G.

AU - Taylor, B.

AU - Vanmunster, T.

PY - 2007/12/20

Y1 - 2007/12/20

N2 - We report on a V = 11.2 early K dwarf, XO-2 (GSC 03413-00005), that hosts aRp = 0.98±0.03 0.01Rj,M p = 0.57 ± 0.06 MJ transiting extrasolar planet, XO-2b, with an orbital period of 2.615857 ±0.000005 days. XO-2 has high metallicity, [Fe/H] = 0.45 ±0.02, high proper motion, μtot = 157 mas yr-1, and a common proper motion stellar companion with 31″ separation. The two stars are nearly identical twins, with very similar spectra and apparent magnitudes. Due to the high metallicity, these early K dwarf stars have amass and radius close to solar, M* = 0.98 ± 0.02 M⊙ and R* = 0.97±C.02 C.01 R⊙The high proper motion of XO-2 results from an eccentric orbit (Galactic pericenter, Rper < 4 kpc) well confined to the Galactic disk (Zmax ∼ 100 pc). In addition, the phase-space position of XO-2 is near the Hercules dynamical stream, which points to an origin of XO-2 in the metal-rich, inner thin disk and subsequent dynamical scattering into the solar neighborhood. We describe an efficient Markov chain Monte Carlo algorithm for calculating the Bayesian posterior probability of the system parameters from a transit light curve.

AB - We report on a V = 11.2 early K dwarf, XO-2 (GSC 03413-00005), that hosts aRp = 0.98±0.03 0.01Rj,M p = 0.57 ± 0.06 MJ transiting extrasolar planet, XO-2b, with an orbital period of 2.615857 ±0.000005 days. XO-2 has high metallicity, [Fe/H] = 0.45 ±0.02, high proper motion, μtot = 157 mas yr-1, and a common proper motion stellar companion with 31″ separation. The two stars are nearly identical twins, with very similar spectra and apparent magnitudes. Due to the high metallicity, these early K dwarf stars have amass and radius close to solar, M* = 0.98 ± 0.02 M⊙ and R* = 0.97±C.02 C.01 R⊙The high proper motion of XO-2 results from an eccentric orbit (Galactic pericenter, Rper < 4 kpc) well confined to the Galactic disk (Zmax ∼ 100 pc). In addition, the phase-space position of XO-2 is near the Hercules dynamical stream, which points to an origin of XO-2 in the metal-rich, inner thin disk and subsequent dynamical scattering into the solar neighborhood. We describe an efficient Markov chain Monte Carlo algorithm for calculating the Bayesian posterior probability of the system parameters from a transit light curve.

KW - Binaries: eclipsing

KW - Planetary systems

KW - Stars: individual (GSC 34130-0005)

KW - Techniques: photometric

KW - Techniques: radial velocities

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U2 - 10.1086/523087

DO - 10.1086/523087

M3 - Article

AN - SCOPUS:40249103021

SN - 0004-637X

VL - 671

SP - 2115

EP - 2128

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

ER -

Xo-2b: Transiting hot jupiter in a metal-rich common proper motion binary

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