Constraints on the atmospheric circulation and variability of the eccentric hot Jupiter XO-3b

Ian Wong, Heather A. Knutson, Nicolas B. Cowan, Nikole K. Lewis, Eric Agol, Adam Burrows, Drake Deming, Jonathan J. Fortney, Benjamin J. Fulton, Jonathan Langton, Gregory Laughlin, Adam Showman

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

We report secondary eclipse photometry of the hot Jupiter XO-3b in the 4.5 μm band taken with the Infrared Array Camera on the Spitzer Space Telescope. We measure individual eclipse depths and center of eclipse times for a total of 12 secondary eclipses. We fit these data simultaneously with two transits observed in the same band in order to obtain a global best-fit secondary eclipse depth of 0.1580% ± 0.0036% and a center of eclipse phase of 0.67004 ± 0.00013. We assess the relative magnitude of variations in the dayside brightness of the planet by measuring the size of the residuals during ingress and egress from fitting the combined eclipse light curve with a uniform disk model and place an upper limit of 0.05%. The new secondary eclipse observations extend the total baseline from one and a half years to nearly three years, allowing us to place an upper limit on the periastron precession rate of 2.9 × 10-3 deg day-1 - the tightest constraint to date on the periastron precession rate of a hot Jupiter. We use the new transit observations to calculate improved estimates for the system properties, including an updated orbital ephemeris. We also use the large number of secondary eclipses to obtain the most stringent limits to date on the orbit-to-orbit variability of an eccentric hot Jupiter and demonstrate the consistency of multiple-epoch Spitzer observations.

Original languageEnglish (US)
Article number134
JournalAstrophysical Journal
Volume794
Issue number2
DOIs
StatePublished - Oct 20 2014

Fingerprint

atmospheric circulation
eccentrics
eclipses
Jupiter (planet)
Jupiter
precession
planet
transit
egress
orbits
Space Infrared Telescope Facility
light curve
photometry
rate
planets
brightness
cameras
time measurement
orbitals

Keywords

  • binaries: eclipsing
  • planetary systems
  • stars: individual (XO-3)
  • techniques: photometric

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Constraints on the atmospheric circulation and variability of the eccentric hot Jupiter XO-3b. / Wong, Ian; Knutson, Heather A.; Cowan, Nicolas B.; Lewis, Nikole K.; Agol, Eric; Burrows, Adam; Deming, Drake; Fortney, Jonathan J.; Fulton, Benjamin J.; Langton, Jonathan; Laughlin, Gregory; Showman, Adam.

In: Astrophysical Journal, Vol. 794, No. 2, 134, 20.10.2014.

Research output: Contribution to journalArticle

Wong, I, Knutson, HA, Cowan, NB, Lewis, NK, Agol, E, Burrows, A, Deming, D, Fortney, JJ, Fulton, BJ, Langton, J, Laughlin, G & Showman, A 2014, 'Constraints on the atmospheric circulation and variability of the eccentric hot Jupiter XO-3b', Astrophysical Journal, vol. 794, no. 2, 134. https://doi.org/10.1088/0004-637X/794/2/134
Wong, Ian ; Knutson, Heather A. ; Cowan, Nicolas B. ; Lewis, Nikole K. ; Agol, Eric ; Burrows, Adam ; Deming, Drake ; Fortney, Jonathan J. ; Fulton, Benjamin J. ; Langton, Jonathan ; Laughlin, Gregory ; Showman, Adam. / Constraints on the atmospheric circulation and variability of the eccentric hot Jupiter XO-3b. In: Astrophysical Journal. 2014 ; Vol. 794, No. 2.
@article{5a5e44b77142459e98b9fa04db95a29f,
title = "Constraints on the atmospheric circulation and variability of the eccentric hot Jupiter XO-3b",
abstract = "We report secondary eclipse photometry of the hot Jupiter XO-3b in the 4.5 μm band taken with the Infrared Array Camera on the Spitzer Space Telescope. We measure individual eclipse depths and center of eclipse times for a total of 12 secondary eclipses. We fit these data simultaneously with two transits observed in the same band in order to obtain a global best-fit secondary eclipse depth of 0.1580{\%} ± 0.0036{\%} and a center of eclipse phase of 0.67004 ± 0.00013. We assess the relative magnitude of variations in the dayside brightness of the planet by measuring the size of the residuals during ingress and egress from fitting the combined eclipse light curve with a uniform disk model and place an upper limit of 0.05{\%}. The new secondary eclipse observations extend the total baseline from one and a half years to nearly three years, allowing us to place an upper limit on the periastron precession rate of 2.9 × 10-3 deg day-1 - the tightest constraint to date on the periastron precession rate of a hot Jupiter. We use the new transit observations to calculate improved estimates for the system properties, including an updated orbital ephemeris. We also use the large number of secondary eclipses to obtain the most stringent limits to date on the orbit-to-orbit variability of an eccentric hot Jupiter and demonstrate the consistency of multiple-epoch Spitzer observations.",
keywords = "binaries: eclipsing, planetary systems, stars: individual (XO-3), techniques: photometric",
author = "Ian Wong and Knutson, {Heather A.} and Cowan, {Nicolas B.} and Lewis, {Nikole K.} and Eric Agol and Adam Burrows and Drake Deming and Fortney, {Jonathan J.} and Fulton, {Benjamin J.} and Jonathan Langton and Gregory Laughlin and Adam Showman",
year = "2014",
month = "10",
day = "20",
doi = "10.1088/0004-637X/794/2/134",
language = "English (US)",
volume = "794",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing Ltd.",
number = "2",

}

TY - JOUR

T1 - Constraints on the atmospheric circulation and variability of the eccentric hot Jupiter XO-3b

AU - Wong, Ian

AU - Knutson, Heather A.

AU - Cowan, Nicolas B.

AU - Lewis, Nikole K.

AU - Agol, Eric

AU - Burrows, Adam

AU - Deming, Drake

AU - Fortney, Jonathan J.

AU - Fulton, Benjamin J.

AU - Langton, Jonathan

AU - Laughlin, Gregory

AU - Showman, Adam

PY - 2014/10/20

Y1 - 2014/10/20

N2 - We report secondary eclipse photometry of the hot Jupiter XO-3b in the 4.5 μm band taken with the Infrared Array Camera on the Spitzer Space Telescope. We measure individual eclipse depths and center of eclipse times for a total of 12 secondary eclipses. We fit these data simultaneously with two transits observed in the same band in order to obtain a global best-fit secondary eclipse depth of 0.1580% ± 0.0036% and a center of eclipse phase of 0.67004 ± 0.00013. We assess the relative magnitude of variations in the dayside brightness of the planet by measuring the size of the residuals during ingress and egress from fitting the combined eclipse light curve with a uniform disk model and place an upper limit of 0.05%. The new secondary eclipse observations extend the total baseline from one and a half years to nearly three years, allowing us to place an upper limit on the periastron precession rate of 2.9 × 10-3 deg day-1 - the tightest constraint to date on the periastron precession rate of a hot Jupiter. We use the new transit observations to calculate improved estimates for the system properties, including an updated orbital ephemeris. We also use the large number of secondary eclipses to obtain the most stringent limits to date on the orbit-to-orbit variability of an eccentric hot Jupiter and demonstrate the consistency of multiple-epoch Spitzer observations.

AB - We report secondary eclipse photometry of the hot Jupiter XO-3b in the 4.5 μm band taken with the Infrared Array Camera on the Spitzer Space Telescope. We measure individual eclipse depths and center of eclipse times for a total of 12 secondary eclipses. We fit these data simultaneously with two transits observed in the same band in order to obtain a global best-fit secondary eclipse depth of 0.1580% ± 0.0036% and a center of eclipse phase of 0.67004 ± 0.00013. We assess the relative magnitude of variations in the dayside brightness of the planet by measuring the size of the residuals during ingress and egress from fitting the combined eclipse light curve with a uniform disk model and place an upper limit of 0.05%. The new secondary eclipse observations extend the total baseline from one and a half years to nearly three years, allowing us to place an upper limit on the periastron precession rate of 2.9 × 10-3 deg day-1 - the tightest constraint to date on the periastron precession rate of a hot Jupiter. We use the new transit observations to calculate improved estimates for the system properties, including an updated orbital ephemeris. We also use the large number of secondary eclipses to obtain the most stringent limits to date on the orbit-to-orbit variability of an eccentric hot Jupiter and demonstrate the consistency of multiple-epoch Spitzer observations.

KW - binaries: eclipsing

KW - planetary systems

KW - stars: individual (XO-3)

KW - techniques: photometric

UR - http://www.scopus.com/inward/record.url?scp=84907680957&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84907680957&partnerID=8YFLogxK

U2 - 10.1088/0004-637X/794/2/134

DO - 10.1088/0004-637X/794/2/134

M3 - Article

AN - SCOPUS:84907680957

VL - 794

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 2

M1 - 134

ER -