J/ApJ/742/116 Photometry of four massive transiting exoplanets (Bakos+, 2011)
HAT-P-20b-HAT-P-23b: four massive transiting extrasolar planets.
Bakos G.A., Hartman J., Torres G., Latham D.W., Kovacs G., Noyes R.W.,
Fischer D.A., Johnson J.A., Marcy G.W., Howard A.W., Kipping D.,
Esquerdo G.A., Shporer A., Beky B., Buchhave L.A., Perumpilly G.,
Everett M., Sasselov D.D., Stefanik R.P., Lazar J., Papp I., Sari P.
<Astrophys. J., 742, 116 (2011)>
=2011ApJ...742..116B 2011ApJ...742..116B
ADC_Keywords: Stars, double and multiple ; Photometry, ugriz ; Planets
Keywords: stars: individual (HAT-P-20, HAT-P-21, HAT-P-22, HAT-P-23) -
techniques: photometric - techniques: spectroscopic
Abstract:
We report the discovery of four relatively massive (2-7MJ)
transiting extrasolar planets. HAT-P-20b orbits the moderately bright
V=11.339 K3 dwarf star GSC 1910-00239 on a circular orbit, with a
period P=2.875317±0.000004 days. The planetary companion has a mass
of 7.246±0.187MJ and a radius of 0.867±0.033RJ yielding a mean
density of 13.78±1.50g/cm3. HAT-P-21b orbits the V=11.685 G3 dwarf
star GSC 3013-01229 on an eccentric (e=0.228±0.016) orbit, with a
period P=4.124481±0.000007 days. The planetary companion has a mass
of 4.063±0.161MJ and a radius of 1.024±0.092RJ yielding a mean
density of 4.68+1.59-0.99g/cm3. HAT-P-21b is a borderline object
between the pM and pL class planets, and the transits occur near
apastron. HAT-P-22b orbits the bright V=9.732 G5 dwarf star HD 233731
on a circular orbit, with a period P=3.212220±0.000009 days. The
planet has a mass of 2.147±0.061MJ and a compact radius of
1.080±0.058RJ yielding a mean density of 2.11+0.40-0.29g/cm3.
The host star also harbors an M-dwarf companion at a wide separation.
Finally, HAT-P-23b orbits the V=12.432 G0 dwarf star GSC 1632-01396
on a close to circular orbit, with a period P=1.212884±0.000002 days.
The planetary companion has a mass of 2.090±0.111MJ and a radius of
1.368±0.090RJ yielding a mean density of 1.01±0.18g/cm3.
HAT-P-23b is an inflated and massive hot Jupiter on a very short
period orbit, and has one of the shortest characteristic infall times
(7.5+2.9-1.8Myr) before it gets engulfed by the star.
Description:
We conducted photometric follow-up observations with the KeplerCam CCD
camera on the FLWO 1.2m telescope for each star (2009 Mar 11 and 2009
Oct 21 for HAT-P-20; 2009 Apr 20 and 2010 Feb 15 for HAT-P-21; 2009
Feb 28 and 2009 Apr 30 for HAT-P-23 and 4 nights in 2008 Jun, Sep and
Nov and 2 nights in 2009 Apr and Jul for HAT-P-24), and with the
Faulkes North Telescope (FTN) of the Las Cumbres Observatory Global
Network (LCOGT) at Hawaii for HAT-P-21 only in 2010 Feb 19.
Objects:
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RA (2000) DE Designation(s) (Period)
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07 27 39.95 +24 20 11.4 HAT-P-20 = GSC 01910-00239 (P=2.875317)
11 25 05.99 +41 01 40.6 HAT-P-21 = GSC 03013-01229 (P=4.124481)
10 22 43.59 +50 07 42.0 HAT-P-22 = GSC 03441-00925 (P=3.212220)
20 24 29.72 +16 45 43.8 HAT-P-23 = GSC 01632-01396 (P=1.212884)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table8.dat 39 745 High-precision differential photometry of HAT-P-20
table9.dat 39 1156 High-precision differential photometry of HAT-P-21
table10.dat 39 880 High-precision differential photometry of HAT-P-22
table11.dat 39 940 High-precision differential photometry of HAT-P-23
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See also:
J/A+A/552/A119 : Planet-star and moon-planet interaction (Saur+, 2013)
J/MNRAS/422/2024 : X-ray-age relation & exoplanet evaporation (Jackson+, 2012)
J/PASP/123/412 : Exoplanet Orbit Database (Wright+, 2011)
J/MNRAS/411/L46 : Exoplanet magnetic fields (Vidotto+, 2011)
J/MNRAS/414/108 : Calibrator of exoplanet-host stars (Beust+, 2011)
J/ApJ/742/59 : HAT-P-32 and HAT-P-33 follow-up (Hartman+, 2011)
J/ApJ/728/138 : Follow-up photometry of HAT-P-26 (Hartman+, 2011)
J/ApJ/726/52 : HAT-P-18 and HAT-P-19 follow-up (Hartman+, 2011)
J/AJ/141/166 : HATNet variability survey of K & M dwarfs (Hartman+, 2011)
J/ApJ/715/458 : Differential photometry of HAT-P-14 (Torres+, 2010)
J/ApJ/710/1724 : Follow-up photometry for HAT-P-11 (Bakos+, 2010)
J/ApJ/707/446 : HAT-P-13 photometry follow-up (Bakos+, 2009)
J/ApJ/706/785 : HAT-P-12 light curve (Hartman+, 2009)
J/ApJ/696/1950 : Sloan iz light curves of HAT-P-10 (Bakos+, 2009)
Byte-by-byte Description of file: table10.dat table11.dat table8.dat table9.dat
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Bytes Format Units Label Explanations
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1- 11 F11.5 d BJD UTC Barycentric Julian date (BJD-2400000)
13- 20 F8.5 mag mag Observed magnitude in Filt (1)
22- 28 F7.5 mag e_mag Uncertainty in mag
30- 37 F8.5 mag Omag Raw magnitude in Filt (2)
39 A1 --- Filt [giz] Filter (i for HAT-P-20 and HAT-P-21,
gz for HAT-P-22 and gi for HAT-P-23)
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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): 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] 25-Apr-2013