J/A+A/551/A79 Radial velocity periodic variations in τ Ceti (Tuomi+, 2013)
Signals embedded in the radial velocity noise.
Periodic variations in the τ Ceti velocities.
Tuomi M., Jones H.R.A., Jenkins J.S., Tinney C.G., Butler R.P., Vogt S.S.,
Barnes J.R., Wittenmyer R.A., O'Toole S., Horner J., Bailey J., Carter B.D.,
Wright D.J., Salter G.S., Pinfield D.
<Astron. Astrophys. 551, A79 (2013)>
=2013A&A...551A..79T 2013A&A...551A..79T
ADC_Keywords: Stars, nearby ; Radial velocities
Keywords: methods: statistical - methods: numerical -
techniques: radial velocities - stars: individual: HD 10700
Abstract:
The abilities of radial velocity exoplanet surveys to detect the
lowest-mass extra-solar planets are currently limited by a combination
of instrument precision, lack of data, and "jitter". Jitter is a
general term for any unknown features in the noise, and reflects a
lack of detailed knowledge of stellar physics (asteroseismology,
starspots, magnetic cycles, granulation, and other stellar surface
phenomena), as well as the possible underestimation of instrument
noise.
We study an extensive set of radial velocities for the star HD 10700
(τ Ceti) to determine the properties of the jitter arising from
stellar surface inhomogeneities, activity, and telescope-instrument
systems, and perform a comprehensive search for planetary signals in
the radial velocities.
Description:
The radial velocities of HD 10700 as observed using the HARPS, HIRES,
and UCLES instruments.
Objects:
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RA (2000) DE Designation(s)
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01 44 04.08 -15 56 14.9 tau Cet = HD 10700
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
rv1.dat 26 978 UCLES velocities of HD 10700
rv2.dat 26 567 HIRES velocities of HD 10700
rv3.dat 29 4864 HARPS velocities of HD 10700
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Byte-by-byte Description of file: rv1.dat rv2.dat
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Bytes Format Units Label Explanations
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1- 11 F11.3 d JD Julian Date
13- 18 F6.2 m/s RV Radial velocity
23- 26 F4.2 m/s e_RV rms uncertainty on RV
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Byte-by-byte Description of file: rv3.dat
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Bytes Format Units Label Explanations
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1- 11 F11.3 d JD Julian Date
13- 21 F9.5 km/s RV Radial velocity
23- 29 F7.5 km/s e_RV rms uncertainty on RV
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Acknowledgements:
Mikko Tuomi, miptuom(at)utu.fi
(End) M. Tuomi [Herts. Univ.], Patricia Vannier [CDS] 24-Dec-2012