HAT-P-4b: A metal-rich low-density transiting hot Jupiter

G. Kovács; G. Á Bakos; G. Torres; A. Sozzetti; D. W. Latham; R. W. Noyes; R. P. Butler; G. W. Marcy; D. A. Fischer; J. M. Fernández; G. Esquerdo; D. D. Sasselov; R. P. Stefanik; A. Pál; J. Lázár; I. Papp; P. Sári

doi:10.1086/524058

HAT-P-4b: A metal-rich low-density transiting hot Jupiter

G. Kovács, G. Á Bakos, G. Torres, A. Sozzetti, D. W. Latham, R. W. Noyes, R. P. Butler, G. W. Marcy, D. A. Fischer, J. M. Fernández, G. Esquerdo, D. D. Sasselov, R. P. Stefanik, A. Pál, J. Lázár, I. Papp, P. Sári

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55 Scopus citations

Abstract

We describe the discovery of HAT-P-4b, a low-density extrasolar planet transiting BD +36 2593, a V = 11.2 mag slightly evolved metal-rich late F star. The planet's orbital period is 3.056536 ± 0.000057 days with a midtransit epoch of 2,454,245.8154 ± 0.0003 (HJD). Based on high-precision photometric and spectroscopic data, and by using transit light curve modeling, spectrum analysis, and evolutionary models, we derive the following planet parameters: M_p = 0.68 ± 0.04 MR_J, R _p = 1.27 ± 0.05 R_J ρ_p = 0.41 ± 0.06 g cm^-3, and a = 0.0446 ± 0.0012 AU. Because of its relatively large radius, together with its assumed high metallicity (that of its parent star), this planet adds to the theoretical challenges of explaining inflated extrasolar planets.

Original language	English (US)
Pages (from-to)	L41-L44
Journal	Astrophysical Journal
Volume	670
Issue number	1 PART 2
DOIs	https://doi.org/10.1086/524058
State	Published - 2007
Externally published	Yes

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Planetary systems
Techniques: photometric
Techniques: spectroscopic

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10.1086/524058

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Kovács, G., Bakos, G. Á., Torres, G., Sozzetti, A., Latham, D. W., Noyes, R. W., Butler, R. P., Marcy, G. W., Fischer, D. A., Fernández, J. M., Esquerdo, G., Sasselov, D. D., Stefanik, R. P., Pál, A., Lázár, J., Papp, I., & Sári, P. (2007). HAT-P-4b: A metal-rich low-density transiting hot Jupiter. Astrophysical Journal, 670(1 PART 2), L41-L44. https://doi.org/10.1086/524058

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title = "HAT-P-4b: A metal-rich low-density transiting hot Jupiter",

abstract = "We describe the discovery of HAT-P-4b, a low-density extrasolar planet transiting BD +36 2593, a V = 11.2 mag slightly evolved metal-rich late F star. The planet's orbital period is 3.056536 ± 0.000057 days with a midtransit epoch of 2,454,245.8154 ± 0.0003 (HJD). Based on high-precision photometric and spectroscopic data, and by using transit light curve modeling, spectrum analysis, and evolutionary models, we derive the following planet parameters: Mp = 0.68 ± 0.04 MRJ, R p = 1.27 ± 0.05 RJ ρp = 0.41 ± 0.06 g cm-3, and a = 0.0446 ± 0.0012 AU. Because of its relatively large radius, together with its assumed high metallicity (that of its parent star), this planet adds to the theoretical challenges of explaining inflated extrasolar planets.",

keywords = "Planetary systems, Techniques: photometric, Techniques: spectroscopic",

author = "G. Kov{\'a}cs and Bakos, {G. {\'A}} and G. Torres and A. Sozzetti and Latham, {D. W.} and Noyes, {R. W.} and Butler, {R. P.} and Marcy, {G. W.} and Fischer, {D. A.} and Fern{\'a}ndez, {J. M.} and G. Esquerdo and Sasselov, {D. D.} and Stefanik, {R. P.} and A. P{\'a}l and J. L{\'a}z{\'a}r and I. Papp and P. S{\'a}ri",

year = "2007",

doi = "10.1086/524058",

language = "English (US)",

volume = "670",

pages = "L41--L44",

journal = "Astrophysical Journal",

issn = "0004-637X",

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TY - JOUR

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T2 - A metal-rich low-density transiting hot Jupiter

AU - Kovács, G.

AU - Bakos, G. Á

AU - Torres, G.

AU - Sozzetti, A.

AU - Latham, D. W.

AU - Noyes, R. W.

AU - Butler, R. P.

AU - Marcy, G. W.

AU - Fischer, D. A.

AU - Fernández, J. M.

AU - Esquerdo, G.

AU - Sasselov, D. D.

AU - Stefanik, R. P.

AU - Pál, A.

AU - Lázár, J.

AU - Papp, I.

AU - Sári, P.

PY - 2007

Y1 - 2007

N2 - We describe the discovery of HAT-P-4b, a low-density extrasolar planet transiting BD +36 2593, a V = 11.2 mag slightly evolved metal-rich late F star. The planet's orbital period is 3.056536 ± 0.000057 days with a midtransit epoch of 2,454,245.8154 ± 0.0003 (HJD). Based on high-precision photometric and spectroscopic data, and by using transit light curve modeling, spectrum analysis, and evolutionary models, we derive the following planet parameters: Mp = 0.68 ± 0.04 MRJ, R p = 1.27 ± 0.05 RJ ρp = 0.41 ± 0.06 g cm-3, and a = 0.0446 ± 0.0012 AU. Because of its relatively large radius, together with its assumed high metallicity (that of its parent star), this planet adds to the theoretical challenges of explaining inflated extrasolar planets.

AB - We describe the discovery of HAT-P-4b, a low-density extrasolar planet transiting BD +36 2593, a V = 11.2 mag slightly evolved metal-rich late F star. The planet's orbital period is 3.056536 ± 0.000057 days with a midtransit epoch of 2,454,245.8154 ± 0.0003 (HJD). Based on high-precision photometric and spectroscopic data, and by using transit light curve modeling, spectrum analysis, and evolutionary models, we derive the following planet parameters: Mp = 0.68 ± 0.04 MRJ, R p = 1.27 ± 0.05 RJ ρp = 0.41 ± 0.06 g cm-3, and a = 0.0446 ± 0.0012 AU. Because of its relatively large radius, together with its assumed high metallicity (that of its parent star), this planet adds to the theoretical challenges of explaining inflated extrasolar planets.

KW - Planetary systems

KW - Techniques: photometric

KW - Techniques: spectroscopic

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JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 PART 2

ER -

HAT-P-4b: A metal-rich low-density transiting hot Jupiter

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