J/ApJ/715/458 Differential photometry of HAT-P-14 (Torres+, 2010)
HAT-P-14b: a 2.2 MJ exoplanet transiting a bright F star.
Torres G., Bakos G.A., Hartman J., Kovacs G., Noyes R.W., Latham D.W.,
Fischer D.A., Johnson J.A., Marcy G.W., Howard A.W., Sasselov D.D.,
Kipping D., Sipocz B., Stefanik R.P., Esquerdo G.A., Everett M.E.,
Lazar J., Papp I., Sari P.
<Astrophys. J., 715, 458-467 (2010)>
=2010ApJ...715..458T 2010ApJ...715..458T
ADC_Keywords: Photometry ; Stars, F-type ; Planets ; Stars, double and multiple
Keywords: planetary systems - stars: individual (HAT-P-14, GSC 3086-00152) -
techniques: photometric - techniques: spectroscopic
Abstract:
We report the discovery of HAT-P-14b, a fairly massive transiting
extrasolar planet orbiting the moderately bright star GSC 3086-00152
(V=9.98), with a period of P=4.627669±0.000005 days. The transit is
close to grazing (impact parameter 0.891+0.007-0.008) and has a
duration of 0.0912±0.0017 days, with a reference epoch of
mid-transit of Tc=2454875.28938±0.00047 (BJD). The orbit is
slightly eccentric (e=0.107±0.013), and the orientation is such that
occultations are unlikely to occur. The host star is a slightly
evolved mid-F dwarf with a mass of 1.386±0.045M☉, a radius of
1.468±0.054R☉, effective temperature 6600±90K, and a
slightly metal-rich composition corresponding to [Fe/H]=+0.11±0.08.
The planet has a mass of 2.232±0.059MJ and a radius of
1.150±0.052RJ, implying a mean density of 1.82±0.24g/cm3. Its
radius is well reproduced by theoretical models for the 1.3Gyr age of
the system if the planet has a heavy-element fraction of about
50M{earth} (7% of its total mass). The brightness, near-grazing
orientation, and other properties of HAT-P-14 make it a favorable
transiting system to look for changes in the orbital elements or
transit timing variations induced by a possible second planet, and
also to place meaningful constraints on the presence of sub-Earth mass
or Earth-mass exomoons, by monitoring it for transit duration
variations.
Description:
The transits of HAT-P-14b were detected with the HAT-10 telescope
located in Arizona. Observations in a field containing the star GSC
3086-00152 were made on a nightly basis between 2005 May and July. In
order to permit a more accurate modeling of the light curve, we
conducted additional photometric observations with the KeplerCam CCD
camera on the FLWO 1.2m telescope. We observed five transit events of
HAT-P-14 on the nights of 2008 October 19, 2009 February 2, 2009 March
25, 2009 April 8, and 2009 May 15, in a Sloan i-band filter.
Objects:
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RA (2000) DE Designation(s) (Period)
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17 20 27.87 +38 14 31.9 HAT-P-14 = TYC 3086-152-1 (P=4.627669)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 38 1698 High-precision differential photometry of HAT-P-14
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 d BJD Barycentric Julian Date
15- 22 F8.5 mag imag Differential i band magnitude (1)
24- 30 F7.5 mag e_imag The 1σ error in imag
32- 38 F7.5 mag Ormag Original magnitude (2)
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Note (1): The out-of-transit level has been subtracted. These magnitudes have
been subjected to the EPD and TFA procedures, carried out
simultaneously with the transit fit.
Note (2): Raw magnitude values without application of the EPD and TFA
procedures.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 14-May-2012