J/ApJ/691/1145 Spectrophotometry of TrES-3 and TrES-4 (Sozzetti+, 2009)
A new spectroscopic and photometric analysis of the transiting planet systems
TrES-3 and TrES-4.
Sozzetti A., Torres G., Charbonneau D., Winn J.N., Korzennik S.G.,
Holman M.J., Latham D.W., Laird J.B., Fernandez J., O'donovan F.T.,
Mandushev G., Dunham E., Everett M.E., Esquerdo G.A., Rabus M.,
Belmonte J.A., Deeg H.J., Brown T.N., Hidas M.G., Baliber N.
<Astrophys. J., 691, 1145-1158 (2009)>
=2009ApJ...691.1145S 2009ApJ...691.1145S
ADC_Keywords: Planets ; Photometry, UBV ; Photometry, ugriz ;
Stars, double and multiple
Keywords: stars: abundances - stars: fundamental parameters - stars: individual
(TrES-3, TrES-4) - planetary systems
Abstract:
We report new spectroscopic and photometric observations of the parent
stars of the recently discovered transiting planets TrES-3 and TrES-4.
A detailed abundance analysis based on high-resolution spectra yields
[Fe/H]=-0.19±0.08, Teff=5650±75K, and logg=4.4±0.1 for TrES-3,
and [Fe/H]=+0.14±0.09, Teff=6200±75K, and logg=4.0±0.1 for
TrES-4. The accuracy of the effective temperatures is supported by a
number of independent consistency checks. The spectroscopic orbital
solution for TrES-3 is improved with our new radial velocity
measurements of that system, as are the light-curve parameters for
both systems based on newly acquired photometry for TrES-3 and a
reanalysis of existing photometry for TrES-4. With these revised
stellar parameters, we obtain improved values for the planetary masses
and radii. We find Mp=1.910+0.075-0.080MJup,
Rp=1.336+0.031-0.036RJup for TrES-3, and
Mp=0.925±0.082MJup, Rp=1.783+0.093-0.086RJup for TrES-4.
We confirm TrES-4 as the planet with the largest radius among the
currently known transiting hot Jupiters.
Description:
The high-resolution, high signal-to-noise ratio (S/N) spectroscopic
observations of TrES-3 were obtained in 2007 July and September with
the HIRES spectrograph on the Keck I telescope. In addition to the
photometric measurements presented in the discovery paper (O'Donovan
et al. 2007ApJ...663L..37O 2007ApJ...663L..37O), we have collected six other high-cadence,
high-precision transit light curves of TrES-3. One was obtained in the
V band on UT 2007 April 23 using the CCD camera of the IAC80 telescope
at the Observatorio del Teide, Tenerife, Spain, and the other five
were gathered using KeplerCam at the FLWO 1.2m telescope: two in the
Sloan g and r bands on UT 2007 April 25 and 2008 March 27, and the
remaining three in the i band on UT 2008 March 9, April 12, and May 8.
For consistency, we also reprocessed in the same way the two discovery
light curves of TrES-3 presented in O'Donovan et al., as well as the
three photometric datasets utilized by Mandushev et al.
(2007ApJ...667L.195M 2007ApJ...667L.195M) in their discovery announcement of TrES-4.
Objects:
------------------------------------------------
RA (2000) DE Designation(s)
------------------------------------------------
17 52 07.0 +37 32 46 TrES-3 = NAME TrES-3b
17 53 13.1 +37 12 42 TrES-4 = NAME TrES-4b
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 45 1563 Differential photometry of TrES-3
table4.dat 45 1140 Differential photometry of TrES-4
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See also:
J/AJ/136/267 : Six occultations of the exoplanet TrES-3 (Winn+, 2008)
J/MNRAS/408/1494 : Planetary transits of TrES-2 and TrES-3 (Colon+, 2010)
Byte-by-byte Description of file: table[34].dat
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Bytes Format Units Label Explanations
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1 A1 --- Filt Filter used in observation (B, V, g, i, r, z)
3- 14 A12 --- Tel Telescope used in observation
16- 29 F14.6 d HJD Heliocentric Julian Date at mid-exposure
31- 37 F7.5 --- RFlux Relative flux in Filt (1)
39- 45 F7.5 --- e_RFlux Uncertainty in RFlux (1)
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Note (1): The data have been corrected for residual extinction effects,
and the uncertainties have been rescaled as described in Section 2.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 23-Feb-2011