J/ApJ/735/24 HAT-P-30 follow-up photometry (Johnson+, 2011)
HAT-P-30b: a transiting hot Jupiter on a highly oblique orbit.
Johnson J.A., Winn J.N., Bakos G.A., Hartman J.D., Morton T.D., Torres G.,
Kovacs G., Latham D.W., Noyes R.W., Sato B., Esquerdo G.A., Fischer D.A.,
Marcy G.W., Howard A.W., Buchhave L.A., Furesz G., Quinn S.N., Beky B.,
Sasselov D.D., Stefanik R.P., Lazar J., Papp I., Sari P.
<Astrophys. J., 735, 24 (2011)>
=2011ApJ...735...24J 2011ApJ...735...24J
ADC_Keywords: Stars, double and multiple ; Radial velocities ;
Photometry, SDSS ; Planets
Keywords: planetary systems - stars: individual (HAT-P-30, GSC 0208-00722)
Abstract:
We report the discovery of HAT-P-30b, a transiting exoplanet orbiting
the V=10.419 dwarf star GSC 0208-00722. The planet has a period
P=2.810595±0.000005 days, transit epoch Tc=2455456.46561±0.00037
(BJD), and transit duration 0.0887±0.0015 days. The host star has a
mass of 1.24±0.04M☉, radius of 1.21±0.05R☉, effective
temperature of 6304±88K, and metallicity [Fe/H]=+0.13±0.08. The
planetary companion has a mass of 0.711±0.028MJ and radius of
1.340±0.065RJ yielding a mean density of 0.37±0.05g/cm3. We
also present radial velocity measurements that were obtained
throughout a transit that exhibit the Rossiter-McLaughlin effect. By
modeling this effect, we measure an angle of λ=73.5±9.0°
between the sky projections of the planet's orbit normal and the
star's spin axis. HAT-P-30b represents another example of a close-in
planet on a highly tilted orbit, and conforms to the previously noted
pattern that tilted orbits are more common around stars with
Teff*≳6250K.
Description:
We used the High-Resolution Echelle Spectrometer on the Keck I
telescope (HIRES), and the High-Dispersion Spectrograph (HDS) on the
Subaru telescope, both atop Mauna Kea in Hawaii, to obtain
high-resolution, high-S/N spectra.
We acquired additional light curves using the KeplerCam imager on the
1.2m telescope at the Fred Lawrence Whipple Observatory (FLWO). We
observed a partial transit on UT 2010 April 3 through a Sloan i-band
filter, and a full transit on UT 2010 November 22 using a z-band
filter.
Objects:
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RA (2000) DE Designation(s)
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08 15 47.98 +05 50 12.4 HAT-P-30 = GSC 00208-00722
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 54 78 Relative radial velocities, bisector spans, and
activity index measurements of HAT-P-30
table2.dat 38 769 KeplerCam differential photometry of HAT-P-30
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See also:
J/MNRAS/422/2024 : X-ray-age relation & exoplanet evaporation (Jackson+, 2012)
J/ApJ/725/875 : Chromospheric activity for CPS stars (Isaacson+, 2010)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 F10.5 d BJD [1313.78/1614.02] Barycentric Julian date;
(BJD-2454000) (1)
12- 17 F6.2 m/s RVel [-95.85/84.53]? Radial velocity (2)
19- 23 F5.2 m/s e_RVel ? The 1σ uncertainty in RVel (3)
25- 29 F5.2 m/s BS ? Bisector span
31- 34 F4.2 m/s e_BS ? The 1σ uncertainty in BS
36- 41 F6.4 --- S ? Chromosperic activity index (4)
43- 47 F5.3 --- Phase Phase
49- 54 A6 --- Inst Instrument (Keck or Subaru)
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Note (1): Calculated from Coordinated Universal Time (UTC).
Note (2): For the iodine-free template exposures there is no RV measurement,
but the BS and S index can still be determined. The zero-point of
these velocities is arbitrary. An overall offset fitted to these
velocities in Section 3.2 has not been subtracted.
Note (3): Internal errors excluding the component of astrophysical/instrumental
jitter considered in Section 3.2.
Note (4): Calibrated to the scale of Isaacson & Fischer (2010,
Cat. J/ApJ/725/875).
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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- 11 F11.5 d BJD [55290/55524.1] Barycentric Julian date;
(BJD-2454000) (1)
13- 20 F8.5 mag mag [-0.0038/0.0171] Corrected differential magnitude
in Filt (2)
22- 28 F7.5 mag e_mag The 1σ uncertainty in mag
30- 36 F7.5 mag Omag [9.26/9.99] Original, raw magnitude in Filt (3)
38 A1 --- Filt [iz] Filter used in the observation (Sloan i or z)
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Note (1): Calculated from Coordinated Universal Time (UTC).
Note (2): The out-of-transit level has been subtracted. These magnitudes have
been obtained by the EPD and TFA procedures.
Note (3): 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] 29-Nov-2012