HAT-P-15b

A 10.9 day extrasolar planet transiting a solar-type star

G. Kovács, G. Á Bakos, J. D. Hartman, G. Torres, R. W. Noyes, D. W. Latham, A. W. Howard, D. A. Fischer, J. A. Johnson, G. W. Marcy, H. Isaacson, D. D. Sasselov, R. P. Stefanik, G. A. Esquerdo, J. M. Fernandez, B. Béky J Lázár, I. Papp, P. Sári

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

We report the discovery of HAT-P-15b, a transiting extrasolar planet in the "period valley," a relatively sparsely populated period regime of the known extrasolar planets. The host star, GSC 2883-01687, is a G5 dwarf with V = 12.16. It has amass of 1.01 ±0.04 Mȯ, radius of 1.08 ±0.04 Rȯ, effective temperature 5568 ± 90 K, and metallicity [Fe/H] = +0.22 ± 0.08. The planetary companion orbits the star with a period P = 10.863502 ± 0.000027 days, transit epoch T c = 2454638.56019 ± 0.00048 (BJD), and transit duration 0.2285 ± 0.0015 days. It has a mass of 1.946 ± 0.066 MJ and radius of 1.072 ± 0.043 RJ yielding a mean density of 1.96 ± 0.22 gcm-3. At an age of 6.8+2.5 -1.6 Gyr, the planet is H/He-dominated and theoretical models require about 2% (10 M ) worth of heavy elements to reproduce its measured radius. With an estimated equilibrium temperature of ∼820 K during transit, and ∼1000 K at occultation, HAT-P-15b is a potential candidate to study moderately cool planetary atmospheres by transmission and occultation spectroscopy.

Original languageEnglish
Pages (from-to)866-877
Number of pages12
JournalAstrophysical Journal
Volume724
Issue number2
DOIs
Publication statusPublished - Dec 1 2010

Fingerprint

extrasolar planets
transit
planet
occultation
stars
radii
planetary atmosphere
planetary atmospheres
heavy elements
metallicity
valleys
planets
temperature
spectroscopy
time measurement
orbits
valley

Keywords

  • Planetary systems
  • Stars: individual (HAT-P-15)
  • Techniques: photometric
  • Techniques: spectroscopic

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics
  • Nuclear and High Energy Physics

Cite this

Kovács, G., Bakos, G. Á., Hartman, J. D., Torres, G., Noyes, R. W., Latham, D. W., ... Sári, P. (2010). HAT-P-15b: A 10.9 day extrasolar planet transiting a solar-type star. Astrophysical Journal, 724(2), 866-877. https://doi.org/10.1088/0004-637X/724/2/866

HAT-P-15b : A 10.9 day extrasolar planet transiting a solar-type star. / Kovács, G.; Bakos, G. Á; Hartman, J. D.; Torres, G.; Noyes, R. W.; Latham, D. W.; Howard, A. W.; Fischer, D. A.; Johnson, J. A.; Marcy, G. W.; Isaacson, H.; Sasselov, D. D.; Stefanik, R. P.; Esquerdo, G. A.; Fernandez, J. M.; Lázár, B. Béky J; Papp, I.; Sári, P.

In: Astrophysical Journal, Vol. 724, No. 2, 01.12.2010, p. 866-877.

Research output: Contribution to journalArticle

Kovács, G, Bakos, GÁ, Hartman, JD, Torres, G, Noyes, RW, Latham, DW, Howard, AW, Fischer, DA, Johnson, JA, Marcy, GW, Isaacson, H, Sasselov, DD, Stefanik, RP, Esquerdo, GA, Fernandez, JM, Lázár, BBJ, Papp, I & Sári, P 2010, 'HAT-P-15b: A 10.9 day extrasolar planet transiting a solar-type star', Astrophysical Journal, vol. 724, no. 2, pp. 866-877. https://doi.org/10.1088/0004-637X/724/2/866
Kovács G, Bakos GÁ, Hartman JD, Torres G, Noyes RW, Latham DW et al. HAT-P-15b: A 10.9 day extrasolar planet transiting a solar-type star. Astrophysical Journal. 2010 Dec 1;724(2):866-877. https://doi.org/10.1088/0004-637X/724/2/866
Kovács, G. ; Bakos, G. Á ; Hartman, J. D. ; Torres, G. ; Noyes, R. W. ; Latham, D. W. ; Howard, A. W. ; Fischer, D. A. ; Johnson, J. A. ; Marcy, G. W. ; Isaacson, H. ; Sasselov, D. D. ; Stefanik, R. P. ; Esquerdo, G. A. ; Fernandez, J. M. ; Lázár, B. Béky J ; Papp, I. ; Sári, P. / HAT-P-15b : A 10.9 day extrasolar planet transiting a solar-type star. In: Astrophysical Journal. 2010 ; Vol. 724, No. 2. pp. 866-877.
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AB - We report the discovery of HAT-P-15b, a transiting extrasolar planet in the "period valley," a relatively sparsely populated period regime of the known extrasolar planets. The host star, GSC 2883-01687, is a G5 dwarf with V = 12.16. It has amass of 1.01 ±0.04 Mȯ, radius of 1.08 ±0.04 Rȯ, effective temperature 5568 ± 90 K, and metallicity [Fe/H] = +0.22 ± 0.08. The planetary companion orbits the star with a period P = 10.863502 ± 0.000027 days, transit epoch T c = 2454638.56019 ± 0.00048 (BJD), and transit duration 0.2285 ± 0.0015 days. It has a mass of 1.946 ± 0.066 MJ and radius of 1.072 ± 0.043 RJ yielding a mean density of 1.96 ± 0.22 gcm-3. At an age of 6.8+2.5 -1.6 Gyr, the planet is H/He-dominated and theoretical models require about 2% (10 M ⊕) worth of heavy elements to reproduce its measured radius. With an estimated equilibrium temperature of ∼820 K during transit, and ∼1000 K at occultation, HAT-P-15b is a potential candidate to study moderately cool planetary atmospheres by transmission and occultation spectroscopy.

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