HAT-P-20b-HAT-P-23b: Four massive transiting extrasolar planets

A. G. Bakos; J. Hartman; G. Torres; D. W. Latham; Géza Kovcs; R. W. Noyes; D. A. Fischer; J. A. Johnson; G. W. Marcy; A. W. Howard; D. Kipping; G. A. Esquerdo; A. Shporer; B. Béky; L. A. Buchhave; G. Perumpilly; M. Everett; D. D. Sasselov; R. P. Stefanik; J. Lázár; I. Papp; P. Sári

doi:10.1088/0004-637X/742/2/116

HAT-P-20b-HAT-P-23b: Four massive transiting extrasolar planets

A. G. Bakos
, J. Hartman
, G. Torres
, D. W. Latham
, Géza Kovcs
, R. W. Noyes
, D. A. Fischer
, J. A. Johnson
, G. W. Marcy
, A. W. Howard
, D. Kipping
, G. A. Esquerdo
, A. Shporer
, B. Béky
, L. A. Buchhave
, G. Perumpilly
, M. Everett
, D. D. Sasselov
, R. P. Stefanik
, J. Lázár

I. Papp, P. Sári

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

63 Scopus citations

Abstract

We report the discovery of four relatively massive (2-7 M _J) transiting extrasolar planets. HAT-P-20b orbits the moderately bright V = 11.339 K3 dwarf star GSC 1910-00239 on a circular orbit, with a period P = 2.875317 ± 0.000004days, transit epoch T_c = 2455080.92661± 0.00021 (BJD_UTC), and transit duration 0.0770 0.0008days. The host star has a mass of 0.76 ±0.03 M _⊙, radius of 0.69± 0.02 R _⊙, effective temperature 4595 ±80K, and metallicity [Fe/H] = +0.35 0.08. The planetary companion has a mass of 7.246± 0.187M _J and a radius of 0.867 ±0.033R _J yielding a mean density of 13.78± 1.50g cm^-3. HAT-P-21b orbits the V = 11.685 G3 dwarf star GSC 3013-01229 on an eccentric (e = 0.228± 0.016) orbit, with a period P = 4.124481± 0.000007days, transit epoch T_c = 2454996.41312± 0.00069, and transit duration 0.1530± 0.0027days. The host star has a mass of 0.95 ±0.04 M _⊙, radius of 1.10 0.08 R _⊙, effective temperature 5588 80K, and metallicity [Fe/H] = +0.01 0.08. The planetary companion has a mass of 4.063± 0.161M _J and a radius of 1.024± 0.092R _J yielding a mean density of 4.68 ^+1.59 _{- 0.99}g cm^-3. HAT-P-21b is a borderline object between the pM and pL class planets, and the transits occur near apastron. HAT-P-22b orbits the bright V = 9.732 G5 dwarf star HD 233731 on a circular orbit, with a period P = 3.212220 ±0.000009days, transit epoch T_c = 2454930.22001 ±0.00025, and transit duration 0.1196 0.0014days. The host star has a mass of 0.92 0.03 M _⊙, radius of 1.04 0.04 R _⊙, effective temperature 5302 80K, and metallicity [Fe/H] = +0.24± 0.08. The planet has a mass of 2.147 0.061M _J and a compact radius of 1.080 0.058R _J yielding a mean density of 2.11^+0.40 _{- 0.29}g cm^-3. The host star also harbors an M-dwarf companion at a wide separation. Finally, HAT-P-23b orbits the V = 12.432 G0 dwarf star GSC 1632-01396 on a close to circular orbit, with a period P = 1.212884± 0.000002days, transit epoch T_c = 2454852.26464 ± 0.00018, and transit duration 0.0908 ±0.0007days. The host star has a mass of 1.13 ±0.04 M _⊙, radius of 1.20 ±0.07 R _⊙, effective temperature 5905± 80K, and metallicity [Fe/H] = +0.15± 0.04. The planetary companion has a mass of 2.090 0.111M _J and a radius of 1.368± 0.090R _J yielding a mean density of 1.01 ±0.18g cm^-3. HAT-P-23b is an inflated and massive hot Jupiter on a very short period orbit, and has one of the shortest characteristic infall times (7.5^+2.9 _{- 1.8}Myr) before it gets engulfed by the star.

Original language	English (US)
Article number	116
Journal	Astrophysical Journal
Volume	742
Issue number	2
DOIs	https://doi.org/10.1088/0004-637X/742/2/116
State	Published - Dec 1 2011
Externally published	Yes

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

stars: individual (HAT-P-20, HAT-P-21, HAT-P-22, HAT-P-23)
techniques: photometric
techniques: spectroscopic

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10.1088/0004-637X/742/2/116

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Bakos, A. G., Hartman, J., Torres, G., Latham, D. W., Kovcs, G., Noyes, R. W., Fischer, D. A., Johnson, J. A., Marcy, G. W., Howard, A. W., Kipping, D., Esquerdo, G. A., Shporer, A., Béky, B., Buchhave, L. A., Perumpilly, G., Everett, M., Sasselov, D. D., Stefanik, R. P., ... Sári, P. (2011). HAT-P-20b-HAT-P-23b: Four massive transiting extrasolar planets. Astrophysical Journal, 742(2), Article 116. https://doi.org/10.1088/0004-637X/742/2/116

@article{f2d85141e04c46e995bb2c0b2e297dca,

title = "HAT-P-20b-HAT-P-23b: Four massive transiting extrasolar planets",

abstract = "We report the discovery of four relatively massive (2-7 M J) transiting extrasolar planets. HAT-P-20b orbits the moderately bright V = 11.339 K3 dwarf star GSC 1910-00239 on a circular orbit, with a period P = 2.875317 ± 0.000004days, transit epoch Tc = 2455080.92661± 0.00021 (BJDUTC), and transit duration 0.0770 0.0008days. The host star has a mass of 0.76 ±0.03 M ⊙, radius of 0.69± 0.02 R ⊙, effective temperature 4595 ±80K, and metallicity [Fe/H] = +0.35 0.08. The planetary companion has a mass of 7.246± 0.187M J and a radius of 0.867 ±0.033R J yielding a mean density of 13.78± 1.50g cm-3. HAT-P-21b orbits the V = 11.685 G3 dwarf star GSC 3013-01229 on an eccentric (e = 0.228± 0.016) orbit, with a period P = 4.124481± 0.000007days, transit epoch Tc = 2454996.41312± 0.00069, and transit duration 0.1530± 0.0027days. The host star has a mass of 0.95 ±0.04 M ⊙, radius of 1.10 0.08 R ⊙, effective temperature 5588 80K, and metallicity [Fe/H] = +0.01 0.08. The planetary companion has a mass of 4.063± 0.161M J and a radius of 1.024± 0.092R J yielding a mean density of 4.68 +1.59 - 0.99g cm-3. HAT-P-21b is a borderline object between the pM and pL class planets, and the transits occur near apastron. HAT-P-22b orbits the bright V = 9.732 G5 dwarf star HD 233731 on a circular orbit, with a period P = 3.212220 ±0.000009days, transit epoch Tc = 2454930.22001 ±0.00025, and transit duration 0.1196 0.0014days. The host star has a mass of 0.92 0.03 M ⊙, radius of 1.04 0.04 R ⊙, effective temperature 5302 80K, and metallicity [Fe/H] = +0.24± 0.08. The planet has a mass of 2.147 0.061M J and a compact radius of 1.080 0.058R J yielding a mean density of 2.11+0.40 - 0.29g cm-3. The host star also harbors an M-dwarf companion at a wide separation. Finally, HAT-P-23b orbits the V = 12.432 G0 dwarf star GSC 1632-01396 on a close to circular orbit, with a period P = 1.212884± 0.000002days, transit epoch Tc = 2454852.26464 ± 0.00018, and transit duration 0.0908 ±0.0007days. The host star has a mass of 1.13 ±0.04 M ⊙, radius of 1.20 ±0.07 R ⊙, effective temperature 5905± 80K, and metallicity [Fe/H] = +0.15± 0.04. The planetary companion has a mass of 2.090 0.111M J and a radius of 1.368± 0.090R J yielding a mean density of 1.01 ±0.18g cm-3. HAT-P-23b is an inflated and massive hot Jupiter on a very short period orbit, and has one of the shortest characteristic infall times (7.5+2.9 - 1.8Myr) before it gets engulfed by the star.",

keywords = "stars: individual (HAT-P-20, HAT-P-21, HAT-P-22, HAT-P-23), techniques: photometric, techniques: spectroscopic",

author = "Bakos, \{A. G.\} and J. Hartman and G. Torres and Latham, \{D. W.\} and G{\'e}za Kovcs and Noyes, \{R. W.\} and Fischer, \{D. A.\} and Johnson, \{J. A.\} and Marcy, \{G. W.\} and Howard, \{A. W.\} and D. Kipping and Esquerdo, \{G. A.\} and A. Shporer and B. B{\'e}ky and Buchhave, \{L. A.\} and G. Perumpilly and M. Everett and Sasselov, \{D. D.\} and Stefanik, \{R. P.\} and J. L{\'a}z{\'a}r and I. Papp and P. S{\'a}ri",

year = "2011",

month = dec,

day = "1",

doi = "10.1088/0004-637X/742/2/116",

language = "English (US)",

volume = "742",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "2",

}

Bakos, AG , Hartman, J, Torres, G, Latham, DW, Kovcs, G, Noyes, RW, Fischer, DA, Johnson, JA, Marcy, GW, Howard, AW, Kipping, D, Esquerdo, GA, Shporer, A, Béky, B, Buchhave, LA, Perumpilly, G, Everett, M, Sasselov, DD, Stefanik, RP, Lázár, J, Papp, I & Sári, P 2011, 'HAT-P-20b-HAT-P-23b: Four massive transiting extrasolar planets', Astrophysical Journal, vol. 742, no. 2, 116. https://doi.org/10.1088/0004-637X/742/2/116

TY - JOUR

T1 - HAT-P-20b-HAT-P-23b

T2 - Four massive transiting extrasolar planets

AU - Bakos, A. G.

AU - Hartman, J.

AU - Torres, G.

AU - Latham, D. W.

AU - Kovcs, Géza

AU - Noyes, R. W.

AU - Fischer, D. A.

AU - Johnson, J. A.

AU - Marcy, G. W.

AU - Howard, A. W.

AU - Kipping, D.

AU - Esquerdo, G. A.

AU - Shporer, A.

AU - Béky, B.

AU - Buchhave, L. A.

AU - Perumpilly, G.

AU - Everett, M.

AU - Sasselov, D. D.

AU - Stefanik, R. P.

AU - Lázár, J.

AU - Papp, I.

AU - Sári, P.

PY - 2011/12/1

Y1 - 2011/12/1

N2 - We report the discovery of four relatively massive (2-7 M J) transiting extrasolar planets. HAT-P-20b orbits the moderately bright V = 11.339 K3 dwarf star GSC 1910-00239 on a circular orbit, with a period P = 2.875317 ± 0.000004days, transit epoch Tc = 2455080.92661± 0.00021 (BJDUTC), and transit duration 0.0770 0.0008days. The host star has a mass of 0.76 ±0.03 M ⊙, radius of 0.69± 0.02 R ⊙, effective temperature 4595 ±80K, and metallicity [Fe/H] = +0.35 0.08. The planetary companion has a mass of 7.246± 0.187M J and a radius of 0.867 ±0.033R J yielding a mean density of 13.78± 1.50g cm-3. HAT-P-21b orbits the V = 11.685 G3 dwarf star GSC 3013-01229 on an eccentric (e = 0.228± 0.016) orbit, with a period P = 4.124481± 0.000007days, transit epoch Tc = 2454996.41312± 0.00069, and transit duration 0.1530± 0.0027days. The host star has a mass of 0.95 ±0.04 M ⊙, radius of 1.10 0.08 R ⊙, effective temperature 5588 80K, and metallicity [Fe/H] = +0.01 0.08. The planetary companion has a mass of 4.063± 0.161M J and a radius of 1.024± 0.092R J yielding a mean density of 4.68 +1.59 - 0.99g cm-3. HAT-P-21b is a borderline object between the pM and pL class planets, and the transits occur near apastron. HAT-P-22b orbits the bright V = 9.732 G5 dwarf star HD 233731 on a circular orbit, with a period P = 3.212220 ±0.000009days, transit epoch Tc = 2454930.22001 ±0.00025, and transit duration 0.1196 0.0014days. The host star has a mass of 0.92 0.03 M ⊙, radius of 1.04 0.04 R ⊙, effective temperature 5302 80K, and metallicity [Fe/H] = +0.24± 0.08. The planet has a mass of 2.147 0.061M J and a compact radius of 1.080 0.058R J yielding a mean density of 2.11+0.40 - 0.29g cm-3. The host star also harbors an M-dwarf companion at a wide separation. Finally, HAT-P-23b orbits the V = 12.432 G0 dwarf star GSC 1632-01396 on a close to circular orbit, with a period P = 1.212884± 0.000002days, transit epoch Tc = 2454852.26464 ± 0.00018, and transit duration 0.0908 ±0.0007days. The host star has a mass of 1.13 ±0.04 M ⊙, radius of 1.20 ±0.07 R ⊙, effective temperature 5905± 80K, and metallicity [Fe/H] = +0.15± 0.04. The planetary companion has a mass of 2.090 0.111M J and a radius of 1.368± 0.090R J yielding a mean density of 1.01 ±0.18g cm-3. HAT-P-23b is an inflated and massive hot Jupiter on a very short period orbit, and has one of the shortest characteristic infall times (7.5+2.9 - 1.8Myr) before it gets engulfed by the star.

AB - We report the discovery of four relatively massive (2-7 M J) transiting extrasolar planets. HAT-P-20b orbits the moderately bright V = 11.339 K3 dwarf star GSC 1910-00239 on a circular orbit, with a period P = 2.875317 ± 0.000004days, transit epoch Tc = 2455080.92661± 0.00021 (BJDUTC), and transit duration 0.0770 0.0008days. The host star has a mass of 0.76 ±0.03 M ⊙, radius of 0.69± 0.02 R ⊙, effective temperature 4595 ±80K, and metallicity [Fe/H] = +0.35 0.08. The planetary companion has a mass of 7.246± 0.187M J and a radius of 0.867 ±0.033R J yielding a mean density of 13.78± 1.50g cm-3. HAT-P-21b orbits the V = 11.685 G3 dwarf star GSC 3013-01229 on an eccentric (e = 0.228± 0.016) orbit, with a period P = 4.124481± 0.000007days, transit epoch Tc = 2454996.41312± 0.00069, and transit duration 0.1530± 0.0027days. The host star has a mass of 0.95 ±0.04 M ⊙, radius of 1.10 0.08 R ⊙, effective temperature 5588 80K, and metallicity [Fe/H] = +0.01 0.08. The planetary companion has a mass of 4.063± 0.161M J and a radius of 1.024± 0.092R J yielding a mean density of 4.68 +1.59 - 0.99g cm-3. HAT-P-21b is a borderline object between the pM and pL class planets, and the transits occur near apastron. HAT-P-22b orbits the bright V = 9.732 G5 dwarf star HD 233731 on a circular orbit, with a period P = 3.212220 ±0.000009days, transit epoch Tc = 2454930.22001 ±0.00025, and transit duration 0.1196 0.0014days. The host star has a mass of 0.92 0.03 M ⊙, radius of 1.04 0.04 R ⊙, effective temperature 5302 80K, and metallicity [Fe/H] = +0.24± 0.08. The planet has a mass of 2.147 0.061M J and a compact radius of 1.080 0.058R J yielding a mean density of 2.11+0.40 - 0.29g cm-3. The host star also harbors an M-dwarf companion at a wide separation. Finally, HAT-P-23b orbits the V = 12.432 G0 dwarf star GSC 1632-01396 on a close to circular orbit, with a period P = 1.212884± 0.000002days, transit epoch Tc = 2454852.26464 ± 0.00018, and transit duration 0.0908 ±0.0007days. The host star has a mass of 1.13 ±0.04 M ⊙, radius of 1.20 ±0.07 R ⊙, effective temperature 5905± 80K, and metallicity [Fe/H] = +0.15± 0.04. The planetary companion has a mass of 2.090 0.111M J and a radius of 1.368± 0.090R J yielding a mean density of 1.01 ±0.18g cm-3. HAT-P-23b is an inflated and massive hot Jupiter on a very short period orbit, and has one of the shortest characteristic infall times (7.5+2.9 - 1.8Myr) before it gets engulfed by the star.

KW - stars: individual (HAT-P-20, HAT-P-21, HAT-P-22, HAT-P-23)

KW - techniques: photometric

KW - techniques: spectroscopic

UR - https://www.scopus.com/pages/publications/81255190624

UR - https://www.scopus.com/pages/publications/81255190624#tab=citedBy

U2 - 10.1088/0004-637X/742/2/116

DO - 10.1088/0004-637X/742/2/116

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SN - 0004-637X

VL - 742

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 116

ER -

HAT-P-20b-HAT-P-23b: Four massive transiting extrasolar planets

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