J/AJ/164/178 Archival radial velocities of HD 80606 (Pearson+, 2022)
Utilizing a Global Network of Telescopes to Update the Ephemeris for the Highly
Eccentric Planet HD 80606 b and to Ensure the Efficient Scheduling of JWST.
Pearson K.A., Beichman C., Fulton B.J., Esposito T.M., Zellem R.T.,
Ciardi D.R., Rolfness J., Engelke J., Fatahi T., Zimmerman-Brachman R.,
Avsar A., Bhalerao V., Boyce P., Bretton M., Burnett A.D., Burt J.,
Cynamon C.H., Fowler M., Gallego D., Gomez E., Guillet B., Hilburn J.,
Jongen Y., Kataria T., Kokori A., Kumar H., Kuossari P., Lekkas G.,
Marchini A., Meneghelli N., Ngeow C.-C., Primm M., Samantaray S.,
Shimizu M., Silvis G., Sienkiewicz F., Swain V., Tan J., Tock K., Wagner K.,
Wunsche A.
<Astron. J., 164, 178 (2022)>
=2022AJ....164..178P 2022AJ....164..178P
ADC_Keywords: Exoplanets; Stars, high-velocity; Spectra, optical;
Radial velocities
Keywords: Exoplanets ; Observational astronomy ; Orbit determination
Abstract:
The transiting planet HD80606b undergoes a 1000 fold increase in
insolation during its 111days orbit due to it being highly eccentric
(e=0.93). The planet's effective temperature increases from 400 to
over 1400K in a few hours as it makes a rapid passage to within 0.03au
of its host star during periapsis. Spectroscopic observations during
the eclipse (which is conveniently oriented a few hours before
periapsis) of HD80606b with the James Webb Space Telescope (JWST) are
poised to exploit this highly variable environment to study a wide
variety of atmospheric properties, including composition, chemical and
dynamical timescales, and large scale atmospheric motions. Critical to
planning and interpreting these observations is an accurate knowledge
of the planet's orbit. We report on observations of two full-transit
events: 2020 February 7 as observed by the TESS spacecraft and 2021
December 7-8 as observed with a worldwide network of small telescopes.
We also report new radial velocity observations which, when analyzed
with a coupled model to the transits, greatly improves the planet's
orbital ephemeris. Our new orbit solution reduces the uncertainty in
the transit and eclipse timing of the JWST era from tens of minutes to
a few minutes. When combined with the planned JWST observations, this
new precision may be adequate to look for non-Keplerian effects in the
orbit of HD80606b.
Description:
We used radial velocity measurements spanning 22yr for the data
analysis (Naef+, 2001, J/A+A/375/L27; Wittenmyer+ 2007AJ....134.1276W 2007AJ....134.1276W
and 2009, J/ApJS/182/97; Rosenthal+, 2021ApJS..255....8R 2021ApJS..255....8R).
Objects:
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RA (2000) DE Designation(s) (Period)
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09 22 37.57 +50 36 13.4 HD 80606 = AGKR 8437 (P=111.43670d)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table6.dat 33 264 Raw archival radial velocity observations
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See also:
J/A+A/375/L27 : HD 80606b, planet on an extremely elongated orbit (Naef+ 2001)
J/A+A/498/L5 : Photometry and spectroscopy of HD 80606b (Moutou+, 2009)
J/A+A/502/695 : Observations of HD 80606 planetary system (Pont+, 2009)
J/ApJS/182/97 : Radial velocities of multi-planet systems (Wittenmyer+, 2009)
J/A+A/516/A95 : Photometry and spectroscopy of HD 80606b (Hebrard+, 2010)
J/ApJ/722/880 : Observations of two transits of HD 80606b (Shporer+, 2010)
J/A+A/602/A107 : 231 transiting planets eccentricity and mass (Bonomo+, 2017)
J/AJ/153/136 : Planets & host stars with Gaia parallaxes (Stassun+, 2017)
J/AJ/158/243 : A search for multiplanet systems with TESS (Pearson, 2019)
J/AJ/157/21 : Ground-based spectroscopy of exoplanet XO-2b (Pearson+, 2019)
Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Inst Instrument identifier; APF, ELODIE, HIRES, HRS or
SOPHIE
9- 19 F11.3 d BJD [2451508/2459545] Barycentric Julian Date; TBD
21- 27 F7.2 m/s RVel [-341/4457] Relative radial velocity
29- 33 F5.2 m/s e_RVel [0.8/21] Uncertainty in RVel
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 25-Nov-2022