J/other/Nat/481.475 Radial velocities of Kepler-34b & Kepler-35b (Welsh+, 2012)
Transiting circumbinary planets Kepler-34 b and Kepler-35 b.
Welsh W.F., Orosz J.A., Carter J.A., Fabrycky D.C., Ford E.B.,
Lissauer J.J., Prsa A., Quinn S., Ragozzine D., Short D.R., Torres G.,
Winn J.N., Doyle L.R., Barclay T., Batalha N., Bloemen S., Brugamyer E.,
Buchhave L.A., Caldwell C., Caldwell D.A., Christiansen J.L., Ciardi D.R.,
Cochran W.D., Endl M., Fortney J.J., Gautier III T.N., Gilliland R.L.,
Haas M.R., Hall J.R., Holman M.J., Howard A.W., Howell S.B., Isaacson H.,
Jenkins J.M., Klaus T.C., Latham D.W., Li J., Marcy G.W., Mazeh T.,
Quintana E.V., Robertson P., Shporer A., Steffen J.A., Windmiller G.,
Koch D.G., Borucki W.J.
<Nature, 481, 475-479 (2012)>
=2012Natur.481..475W 2012Natur.481..475W
ADC_Keywords: Stars, double and multiple ; Planets ; Radial velocities
Keywords: Astronomy
Abstract:
Most Sun-like stars in the Galaxy reside in gravitationally bound
pairs of stars (binaries). Although long anticipated the existence of
a 'circumbinary planet' orbiting such a pair of normal stars was not
definitively established until the discovery of the planet transiting
(that is, passing in front of) Kepler-16. Questions remained, however,
about the prevalence of circumbinary planets and their range of
orbital and physical properties. Here we report two additional
transiting circumbinary planets: Kepler-34(AB)b and Kepler-35(AB)b,
referred to here as Kepler-34b and Kepler-35b, respectively. Each is a
low-density gas-giant planet on an orbit closely aligned with that of
its parent stars. Kepler-34b orbits two Sun-like stars every
289 days, whereas Kepler-35b orbits a pair of smaller stars (89% and
81% of the Sun's mass) every 131 days. The planets experience large
multi-periodic variations in incident stellar radiation arising from
the orbital motion of the stars. The observed rate of circumbinary
planets in our sample implies that more than ∼1% of close binary stars
have giant planets in nearly coplanar orbits, yielding a Galactic
population of at least several million.
Description:
We observed Kepler-34 and Kepler-35 with the Hobby-Eberly Telescope
(HET) and the Harlan J. Smith 2.7 m Telescope (HJST) at McDonald
Observatory with the aim to help define the spectroscopic orbit of
these two binary systems. We used the High Resolution Spectrograph23
(HRS) at the HET to collect 7 spectra for Kepler-34 in 2011 September
and 4 spectra for Kepler-35 in 2011 October.
Objects:
------------------------------------------------------------------------
RA (2000) DE Designation(s) (Period)
------------------------------------------------------------------------
19 45 44.6 +44 38 29.6 Kepler 34 = KOI-2459 = KIC 8572936 (P=288.822)
19 37 59.3 +46 41 23.6 Kepler 35 = KOI-2937 = KIC 9837578 (P=131.458)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 74 22 The radial velocities for Kepler 34
table4.dat 74 13 The radial velocities for Kepler 35
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See also:
V/133 : Kepler Input Catalog (Kepler Mission Team, 2009)
J/ApJ/728/117 : Kepler planetary candidates. I. (Borucki+, 2011)
Byte-by-byte Description of file: table3.dat table4.dat
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Bytes Format Units Label Explanations
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1- 10 A10 "YYYY-MM-DD" Obs.date UT Date of observation
12- 19 A8 "h:m:s" Obs.time UT Time of observation
21- 35 F15.7 d HJD Heliocentric Julian date
37- 43 F7.3 km/s RVA Radial velocity of A component
45- 49 F5.3 km/s e_RVA rms uncertainty on RVA
51- 57 F7.3 km/s RVB Radial velocity of B component
59- 63 F5.3 km/s e_RVB rms uncertainty on RVB
65- 74 A10 --- Tel Telescope used
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 16-Feb-2012