J/ApJ/721/1829 High-precision transits of OGLE-TR-113b (Adams+, 2010)
Six high-precision transits of OGLE-TR-113b.
Adams E.R., Lopez-Morales M., Elliot J.L., Seager S., Osip D.J.
<Astrophys. J., 721, 1829-1834 (2010)>
=2010ApJ...721.1829A 2010ApJ...721.1829A
ADC_Keywords: Planets ; Photometry, SDSS ; Stars, double and multiple
Keywords: planetary systems - stars: individual (OGLE-TR-113)
Abstract:
We present six new transits of the hot Jupiter OGLE-TR-113b observed
with MagIC on the Magellan Telescopes between 2007 January and 2009
May. We update the system parameters and revise the planetary radius
to Rp=1.084±0.029RJ, where the error is dominated by stellar
radius uncertainties. The new transit midtimes reveal no transit
timing variations from a constant ephemeris of greater than 13±28s
over two years, placing an upper limit of 1-2M{earth} on the mass of
any perturber in a 1:2 or 2:1 mean-motion resonance with OGLE-TR-113b.
Combining the new transit epochs with five epochs published between
2002 and 2006, we find hints that the orbital period of the planet may
not be constant, with the best fit indicating a decrease of
dP/dt=-60±15ms/yr. If real, this change in period could result from
either a long-period (more than eight years) timing variation due to a
massive external perturber or more intriguingly from the orbital decay
of the planet. The detection of a changing period is still tentative
and requires additional observations, but if confirmed it would enable
direct tests of tidal stability and dynamical models of close-in
planets.
Description:
OGLE-TR-113b was reported by Udalski et al. (2002, Cat. II/278) as a
planet candidate transiting a K dwarf (I=14.4; RA(J2000)=10:52:24.40,
DE(J2000)=-61:26:48.5). We observed six transits of OGLE-TR-113b as
part of a larger campaign to detect transit timing variations of OGLE
planets (Adams 2010, PhD thesis, Massachusetts Institute of
Technology). All transits were observed in the Sloan i' band with the
dual-CCD instrument MagIC on the Magellan Telescopes, located at Las
Campanas Observatory in Chile. We used MagIC-SITe for two transits in
2007 January and 2008 February, henceforth denoted by their UT dates
as 20070130 and 20080225. MagIC-e2v was used for four additional
transits between 2008 April and 2009 May (20080424, 20080514,
20090315, and 20090510).
Our analysis also includes four literature light curves: 20050404 and
20050414 in R band (Gillon et al. 2006A&A...459..249G 2006A&A...459..249G), 20050411 in V
band (Pietrukowicz et al. 2010, Cat. J/A+A/509/A4; Diaz et al.
2007ApJ...660..850D 2007ApJ...660..850D), and 20060318 in K band (Snellen & Covino
2007MNRAS.375..307S 2007MNRAS.375..307S).
Objects:
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RA (2000) DE Designation(s) (Period)
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10 52 24.40 -61 26 48.5 OGLE-TR-113b = NAME OGLE-TR-113b (P=1.43248)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 48 2697 New transit flux values
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See also:
II/278 : Transits observed in OGLE 2001-2003 (Udalski+, 2002-2004)
J/MNRAS/422/2024 : Exoplanet evaporation (Jackson+, 2012)
J/MNRAS/414/108 : Calibrator of exoplanet-host stars (Beust+, 2011)
J/MNRAS/411/L46 : Exoplanet magnetic fields (Vidotto+, 2011)
J/A+A/509/A4 : Transits of 12 exoplanet candidates (Pietrukowicz+, 2010)
J/ApJ/692/L9 : Tidal evolution of transiting extrasolar planets (Levrard+,
2009)
J/ApJ/666/475 : Extrasolar planet taxonomy (Marchi+, 2007)
J/A+A/475/359 : Predicting radio fluxes of extrasolar planets (Griessmeier+,
2007)
J/ApJ/649/1010 : Habitability of known exoplanetary systems (Jones+, 2006)
J/A+A/458/997 : Abundances for transiting planet host stars (Santos+, 2006)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 14 F14.6 d UTC UTC mid-exposure date
16- 29 F14.6 d BJD BJDTDB mid-exposure date
31- 39 F9.7 --- Flux Magellan/MagIC relative flux in Sloan i'-band
41- 48 F8.6 --- e_Flux Error in Flux
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 10-Jul-2012