HAT-P-17b,c: A transiting, eccentric, hot saturn and a long-period, cold Jupiter

A. W. Howard; G. Á Bakos; J. Hartman; G. Torres; A. Shporer; T. Mazeh; Géza Kovács; D. W. Latham; R. W. Noyes; D. A. Fischer; J. A. Johnson; G. W. Marcy; G. A. Esquerdo; B. Béky; R. P. Butler; D. D. Sasselov; R. P. Stefanik; G. Perumpilly; J. Lázár; I. Papp; P. Sári

doi:10.1088/0004-637X/749/2/134

HAT-P-17b,c: A transiting, eccentric, hot saturn and a long-period, cold Jupiter

A. W. Howard, G. Á Bakos, J. Hartman, G. Torres, A. Shporer, T. Mazeh, Géza Kovács, D. W. Latham, R. W. Noyes, D. A. Fischer, J. A. Johnson, G. W. Marcy, G. A. Esquerdo, B. Béky, R. P. Butler, D. D. Sasselov, R. P. Stefanik, G. Perumpilly, J. Lázár, I. PappP. Sári

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Abstract

We report the discovery of HAT-P-17b,c, a multi-planet system with an inner transiting planet in a short-period, eccentric orbit and an outer planet in a 4.4yr, nearly circular orbit. The inner planet, HAT-P-17b, transits the bright V = 10.54 early K dwarf star GSC 2717-00417, with an orbital period P = 10.338523 ± 0.000009days, orbital eccentricity e = 0.342 ± 0.006, transit epoch T_c = 2454801.16943 ± 0.00020 (BJD: barycentric Julian dates throughout the paper are calculated from Coordinated Universal Time (UTC)), and transit duration 0.1690 ± 0.0009days. HAT-P-17b has a mass of 0.534 ± 0.018M _J and radius of 1.010 ± 0.029R _J yielding a mean density of 0.64 ± 0.05g cm^-3. This planet has a relatively low equilibrium temperature in the range 780-927K, making it an attractive target for follow-up spectroscopic studies. The outer planet, HAT-P-17c, has a significantly longer orbital period P ₂ = 1610 ± 20days and a minimum mass m ₂sin i ₂ = 1.31^+0.18 _-0.15 M _J. The orbital inclination of HAT-P-17c is unknown as transits have not been observed and may not be present. The host star has a mass of 0.86 ± 0.04M, radius of 0.84 ± 0.02R, effective temperature 5246 ± 80K, and metallicity [Fe/H] = 0.00 ± 0.08. HAT-P-17 is the second multi-planet system detected from ground-based transit surveys.

Original language	English (US)
Article number	134
Journal	Astrophysical Journal
Volume	749
Issue number	2
DOIs	https://doi.org/10.1088/0004-637X/749/2/134
State	Published - Apr 20 2012
Externally published	Yes

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

planetary systems
stars: individual (HAT-P-17, GSC 2717-00417)
techniques: photometric
techniques: spectroscopic

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10.1088/0004-637X/749/2/134

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Howard, A. W., Bakos, G. Á., Hartman, J., Torres, G., Shporer, A., Mazeh, T., Kovács, G., Latham, D. W., Noyes, R. W., Fischer, D. A., Johnson, J. A., Marcy, G. W., Esquerdo, G. A., Béky, B., Butler, R. P., Sasselov, D. D., Stefanik, R. P., Perumpilly, G., Lázár, J., ... Sári, P. (2012). HAT-P-17b,c: A transiting, eccentric, hot saturn and a long-period, cold Jupiter. Astrophysical Journal, 749(2), Article 134. https://doi.org/10.1088/0004-637X/749/2/134

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title = "HAT-P-17b,c: A transiting, eccentric, hot saturn and a long-period, cold Jupiter",

abstract = "We report the discovery of HAT-P-17b,c, a multi-planet system with an inner transiting planet in a short-period, eccentric orbit and an outer planet in a 4.4yr, nearly circular orbit. The inner planet, HAT-P-17b, transits the bright V = 10.54 early K dwarf star GSC 2717-00417, with an orbital period P = 10.338523 ± 0.000009days, orbital eccentricity e = 0.342 ± 0.006, transit epoch Tc = 2454801.16943 ± 0.00020 (BJD: barycentric Julian dates throughout the paper are calculated from Coordinated Universal Time (UTC)), and transit duration 0.1690 ± 0.0009days. HAT-P-17b has a mass of 0.534 ± 0.018M J and radius of 1.010 ± 0.029R J yielding a mean density of 0.64 ± 0.05g cm-3. This planet has a relatively low equilibrium temperature in the range 780-927K, making it an attractive target for follow-up spectroscopic studies. The outer planet, HAT-P-17c, has a significantly longer orbital period P 2 = 1610 ± 20days and a minimum mass m 2sin i 2 = 1.31+0.18 -0.15 M J. The orbital inclination of HAT-P-17c is unknown as transits have not been observed and may not be present. The host star has a mass of 0.86 ± 0.04M, radius of 0.84 ± 0.02R, effective temperature 5246 ± 80K, and metallicity [Fe/H] = 0.00 ± 0.08. HAT-P-17 is the second multi-planet system detected from ground-based transit surveys.",

keywords = "planetary systems, stars: individual (HAT-P-17, GSC 2717-00417), techniques: photometric, techniques: spectroscopic",

author = "Howard, {A. W.} and Bakos, {G. {\'A}} and J. Hartman and G. Torres and A. Shporer and T. Mazeh and G{\'e}za Kov{\'a}cs and Latham, {D. W.} and Noyes, {R. W.} and Fischer, {D. A.} and Johnson, {J. A.} and Marcy, {G. W.} and Esquerdo, {G. A.} and B. B{\'e}ky and Butler, {R. P.} and Sasselov, {D. D.} and Stefanik, {R. P.} and G. Perumpilly and J. L{\'a}z{\'a}r and I. Papp and P. S{\'a}ri",

year = "2012",

month = apr,

day = "20",

doi = "10.1088/0004-637X/749/2/134",

language = "English (US)",

volume = "749",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing Ltd.",

number = "2",

}

Howard, AW, Bakos, GÁ , Hartman, J, Torres, G, Shporer, A, Mazeh, T, Kovács, G, Latham, DW, Noyes, RW, Fischer, DA, Johnson, JA, Marcy, GW, Esquerdo, GA, Béky, B, Butler, RP, Sasselov, DD, Stefanik, RP, Perumpilly, G, Lázár, J, Papp, I & Sári, P 2012, 'HAT-P-17b,c: A transiting, eccentric, hot saturn and a long-period, cold Jupiter', Astrophysical Journal, vol. 749, no. 2, 134. https://doi.org/10.1088/0004-637X/749/2/134

TY - JOUR

T1 - HAT-P-17b,c

T2 - A transiting, eccentric, hot saturn and a long-period, cold Jupiter

AU - Howard, A. W.

AU - Bakos, G. Á

AU - Hartman, J.

AU - Torres, G.

AU - Shporer, A.

AU - Mazeh, T.

AU - Kovács, Géza

AU - Latham, D. W.

AU - Noyes, R. W.

AU - Fischer, D. A.

AU - Johnson, J. A.

AU - Marcy, G. W.

AU - Esquerdo, G. A.

AU - Béky, B.

AU - Butler, R. P.

AU - Sasselov, D. D.

AU - Stefanik, R. P.

AU - Perumpilly, G.

AU - Lázár, J.

AU - Papp, I.

AU - Sári, P.

PY - 2012/4/20

Y1 - 2012/4/20

N2 - We report the discovery of HAT-P-17b,c, a multi-planet system with an inner transiting planet in a short-period, eccentric orbit and an outer planet in a 4.4yr, nearly circular orbit. The inner planet, HAT-P-17b, transits the bright V = 10.54 early K dwarf star GSC 2717-00417, with an orbital period P = 10.338523 ± 0.000009days, orbital eccentricity e = 0.342 ± 0.006, transit epoch Tc = 2454801.16943 ± 0.00020 (BJD: barycentric Julian dates throughout the paper are calculated from Coordinated Universal Time (UTC)), and transit duration 0.1690 ± 0.0009days. HAT-P-17b has a mass of 0.534 ± 0.018M J and radius of 1.010 ± 0.029R J yielding a mean density of 0.64 ± 0.05g cm-3. This planet has a relatively low equilibrium temperature in the range 780-927K, making it an attractive target for follow-up spectroscopic studies. The outer planet, HAT-P-17c, has a significantly longer orbital period P 2 = 1610 ± 20days and a minimum mass m 2sin i 2 = 1.31+0.18 -0.15 M J. The orbital inclination of HAT-P-17c is unknown as transits have not been observed and may not be present. The host star has a mass of 0.86 ± 0.04M, radius of 0.84 ± 0.02R, effective temperature 5246 ± 80K, and metallicity [Fe/H] = 0.00 ± 0.08. HAT-P-17 is the second multi-planet system detected from ground-based transit surveys.

AB - We report the discovery of HAT-P-17b,c, a multi-planet system with an inner transiting planet in a short-period, eccentric orbit and an outer planet in a 4.4yr, nearly circular orbit. The inner planet, HAT-P-17b, transits the bright V = 10.54 early K dwarf star GSC 2717-00417, with an orbital period P = 10.338523 ± 0.000009days, orbital eccentricity e = 0.342 ± 0.006, transit epoch Tc = 2454801.16943 ± 0.00020 (BJD: barycentric Julian dates throughout the paper are calculated from Coordinated Universal Time (UTC)), and transit duration 0.1690 ± 0.0009days. HAT-P-17b has a mass of 0.534 ± 0.018M J and radius of 1.010 ± 0.029R J yielding a mean density of 0.64 ± 0.05g cm-3. This planet has a relatively low equilibrium temperature in the range 780-927K, making it an attractive target for follow-up spectroscopic studies. The outer planet, HAT-P-17c, has a significantly longer orbital period P 2 = 1610 ± 20days and a minimum mass m 2sin i 2 = 1.31+0.18 -0.15 M J. The orbital inclination of HAT-P-17c is unknown as transits have not been observed and may not be present. The host star has a mass of 0.86 ± 0.04M, radius of 0.84 ± 0.02R, effective temperature 5246 ± 80K, and metallicity [Fe/H] = 0.00 ± 0.08. HAT-P-17 is the second multi-planet system detected from ground-based transit surveys.

KW - planetary systems

KW - stars: individual (HAT-P-17, GSC 2717-00417)

KW - techniques: photometric

KW - techniques: spectroscopic

UR - http://www.scopus.com/inward/record.url?scp=84859299649&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84859299649&partnerID=8YFLogxK

U2 - 10.1088/0004-637X/749/2/134

DO - 10.1088/0004-637X/749/2/134

M3 - Article

AN - SCOPUS:84859299649

SN - 0004-637X

VL - 749

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 134

ER -

HAT-P-17b,c: A transiting, eccentric, hot saturn and a long-period, cold Jupiter

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