HAT-P-1b: A large-radius, low-density exoplanet transiting one member of a stellar binary

G. Á Bakus; R. W. Noyes; G. Kovács; D. W. Latham; D. D. Sasselov; G. Torres; D. A. Fischer; R. P. Stefanik; B. Sato; J. A. Johnson; A. Pál; G. W. Marcy; R. P. Butler; G. A. Esquerdo; K. Z. Stanek; J. Láaár; I. Papp; P. Sári; B. Sipöcz

doi:10.1086/509874

HAT-P-1b: A large-radius, low-density exoplanet transiting one member of a stellar binary

G. Á Bakus, R. W. Noyes, G. Kovács, D. W. Latham, D. D. Sasselov, G. Torres, D. A. Fischer, R. P. Stefanik, B. Sato, J. A. Johnson, A. Pál, G. W. Marcy, R. P. Butler, G. A. Esquerdo, K. Z. Stanek, J. Láaár, I. Papp, P. Sári, B. Sipöcz

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Abstract

Using small automated telescopes in Arizona and Hawaii, the HATNet project has detected an object transiting one member of the double star system ADS 16402. This system is a pair of GO main-sequence stars with age about 3 Gyr at a distance of ∼ 139 pc and projected separation of ∼ 1550 AU. The transit signal has a period of 4.46529 days and depth of 0.015 mag. From follow-up photometry and spectroscopy, we find that the object is a "hot Jupiter" planet with mass about 0.53M_J and radius ∼1.36R_J traveling in an orbit with semimajor axis 0.055 AU and inclination about 85.9°, thus transiting the star at impact parameter 0.74 of the stellar radius. Based on a data set spanning 3 yr, ephemerides for the transit center are T_C = 2453984.397 + N_tr × 4.46529. The planet, designated HAT-P-1b, appears to be at least as large in radius, and smaller in mean density, than any previously known planet.

Original language	English (US)
Pages (from-to)	552-559
Number of pages	8
Journal	Astrophysical Journal
Volume	656
Issue number	1 I
DOIs	https://doi.org/10.1086/509874
State	Published - Feb 10 2007
Externally published	Yes

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Binaries: general
Planetary systems
Stars: individual (ADS 16402AB)

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10.1086/509874

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Bakus, G. Á., Noyes, R. W., Kovács, G., Latham, D. W., Sasselov, D. D., Torres, G., Fischer, D. A., Stefanik, R. P., Sato, B., Johnson, J. A., Pál, A., Marcy, G. W., Butler, R. P., Esquerdo, G. A., Stanek, K. Z., Láaár, J., Papp, I., Sári, P., & Sipöcz, B. (2007). HAT-P-1b: A large-radius, low-density exoplanet transiting one member of a stellar binary. Astrophysical Journal, 656(1 I), 552-559. https://doi.org/10.1086/509874

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title = "HAT-P-1b: A large-radius, low-density exoplanet transiting one member of a stellar binary",

abstract = "Using small automated telescopes in Arizona and Hawaii, the HATNet project has detected an object transiting one member of the double star system ADS 16402. This system is a pair of GO main-sequence stars with age about 3 Gyr at a distance of ∼ 139 pc and projected separation of ∼ 1550 AU. The transit signal has a period of 4.46529 days and depth of 0.015 mag. From follow-up photometry and spectroscopy, we find that the object is a {"}hot Jupiter{"} planet with mass about 0.53MJ and radius ∼1.36RJ traveling in an orbit with semimajor axis 0.055 AU and inclination about 85.9°, thus transiting the star at impact parameter 0.74 of the stellar radius. Based on a data set spanning 3 yr, ephemerides for the transit center are TC = 2453984.397 + Ntr × 4.46529. The planet, designated HAT-P-1b, appears to be at least as large in radius, and smaller in mean density, than any previously known planet.",

keywords = "Binaries: general, Planetary systems, Stars: individual (ADS 16402AB)",

author = "Bakus, {G. {\'A}} and Noyes, {R. W.} and G. Kov{\'a}cs and Latham, {D. W.} and Sasselov, {D. D.} and G. Torres and Fischer, {D. A.} and Stefanik, {R. P.} and B. Sato and Johnson, {J. A.} and A. P{\'a}l and Marcy, {G. W.} and Butler, {R. P.} and Esquerdo, {G. A.} and Stanek, {K. Z.} and J. L{\'a}a{\'a}r and I. Papp and P. S{\'a}ri and B. Sip{\"o}cz",

year = "2007",

month = feb,

day = "10",

doi = "10.1086/509874",

language = "English (US)",

volume = "656",

pages = "552--559",

journal = "Astrophysical Journal",

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Bakus, GÁ, Noyes, RW, Kovács, G, Latham, DW, Sasselov, DD, Torres, G, Fischer, DA, Stefanik, RP, Sato, B, Johnson, JA, Pál, A, Marcy, GW, Butler, RP, Esquerdo, GA, Stanek, KZ, Láaár, J, Papp, I, Sári, P & Sipöcz, B 2007, 'HAT-P-1b: A large-radius, low-density exoplanet transiting one member of a stellar binary', Astrophysical Journal, vol. 656, no. 1 I, pp. 552-559. https://doi.org/10.1086/509874

TY - JOUR

T1 - HAT-P-1b

T2 - A large-radius, low-density exoplanet transiting one member of a stellar binary

AU - Bakus, G. Á

AU - Noyes, R. W.

AU - Kovács, G.

AU - Latham, D. W.

AU - Sasselov, D. D.

AU - Torres, G.

AU - Fischer, D. A.

AU - Stefanik, R. P.

AU - Sato, B.

AU - Johnson, J. A.

AU - Pál, A.

AU - Marcy, G. W.

AU - Butler, R. P.

AU - Esquerdo, G. A.

AU - Stanek, K. Z.

AU - Láaár, J.

AU - Papp, I.

AU - Sári, P.

AU - Sipöcz, B.

PY - 2007/2/10

Y1 - 2007/2/10

N2 - Using small automated telescopes in Arizona and Hawaii, the HATNet project has detected an object transiting one member of the double star system ADS 16402. This system is a pair of GO main-sequence stars with age about 3 Gyr at a distance of ∼ 139 pc and projected separation of ∼ 1550 AU. The transit signal has a period of 4.46529 days and depth of 0.015 mag. From follow-up photometry and spectroscopy, we find that the object is a "hot Jupiter" planet with mass about 0.53MJ and radius ∼1.36RJ traveling in an orbit with semimajor axis 0.055 AU and inclination about 85.9°, thus transiting the star at impact parameter 0.74 of the stellar radius. Based on a data set spanning 3 yr, ephemerides for the transit center are TC = 2453984.397 + Ntr × 4.46529. The planet, designated HAT-P-1b, appears to be at least as large in radius, and smaller in mean density, than any previously known planet.

AB - Using small automated telescopes in Arizona and Hawaii, the HATNet project has detected an object transiting one member of the double star system ADS 16402. This system is a pair of GO main-sequence stars with age about 3 Gyr at a distance of ∼ 139 pc and projected separation of ∼ 1550 AU. The transit signal has a period of 4.46529 days and depth of 0.015 mag. From follow-up photometry and spectroscopy, we find that the object is a "hot Jupiter" planet with mass about 0.53MJ and radius ∼1.36RJ traveling in an orbit with semimajor axis 0.055 AU and inclination about 85.9°, thus transiting the star at impact parameter 0.74 of the stellar radius. Based on a data set spanning 3 yr, ephemerides for the transit center are TC = 2453984.397 + Ntr × 4.46529. The planet, designated HAT-P-1b, appears to be at least as large in radius, and smaller in mean density, than any previously known planet.

KW - Binaries: general

KW - Planetary systems

KW - Stars: individual (ADS 16402AB)

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UR - http://www.scopus.com/inward/citedby.url?scp=33847385891&partnerID=8YFLogxK

U2 - 10.1086/509874

DO - 10.1086/509874

M3 - Article

AN - SCOPUS:33847385891

SN - 0004-637X

VL - 656

SP - 552

EP - 559

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 I

ER -

HAT-P-1b: A large-radius, low-density exoplanet transiting one member of a stellar binary

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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