J/A+A/584/A72 A transiting rocky planet at 6.5pc from the Sun (Motalebi+ 2015)
The HARPS-N Rocky Planet Search.I. A transiting rocky planet in a 4 planet
system at 6.5 pc from the Sun.
Motalebi F., Udry S., Gillon M., Lovis C., Segransan D., Buchhave L.A.,
Demory B.O., Malavolta L., Dressing C.D., Sasselov D., Rice K.,
Charbonneau D., Collier Cameron A., Latham D., Molinari E., Pepe F.,
Affer L., Bonomo A.S., Cosentino R., Dumusque X., Figueira P.,
Fiorenzano A.F.M., Gettel S., Harutyunyan A., Haywood R.D., Johnson J.,
Lopez E., Lopez-Morales M., Mayor M., Micela G., Mortier A., Nascimbeni V.,
Philips D., Piotto G., Pollacco D., Queloz D., Sozzetti A., Vanderburg A.,
Watson C.A.
<Astron. Astrophys. 584, A72 (2015)>
=2015A&A...584A..72M 2015A&A...584A..72M (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Planets ; Radial velocities
Keywords: techniques: radial velocities - techniques: photometric -
stars: individual: HD 219134 - binaries: eclipsing -
instrumentation: spectrographs
Abstract:
We know now from radial velocity surveys and transit space missions
that planets only a few times more massive than our Earth are frequent
around solar-type stars. Fundamental questions about their formation
history, physical properties, internal structure, and atmosphere
composition are, however, still to be solved. We present here the
detection of a system of four low-mass planets around the bright
(V=5.5) and close-by (6.5pc) star HD 219134. This is the first
result of the Rocky Planet Search programme with HARPS-N on the
Telescopio Nazionale Galileo in La Palma. The inner planet orbits the
star in 3.0935±0.0003-days, on a quasi-circular orbit with a
semi-major axis of 0.0382±0.0003AU. Spitzer observations allowed
us to detect the transit of the planet in front of the star making
HD 219134 b the nearest known transiting planet to date.
Description:
We obtained 98 spectra of HD219134 using the HARPS-N spectrograph.
Our RV data are provided online.
spitzer.dat contains the photometric time-series presented in the
paper for HD219134 and gathered by the IRAC instrument aboard the
Spitzer telescope in its channel 2 (4.5 microns) on 2015-04-14.
Objects:
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RA (2000) DE Designation(s)
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23 13 16.98 +57 10 06.1 HD 219134 = HR 8832
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table6.dat 45 97 List of undetected sources. The typical
detection limit (3σ level) is 3Jy
spitzer.dat 68 9396 Spitzer channel 2 (4.5 microns) photometry
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 12 F12.6 d BJD Barycentric Julian Date (BJD-2400000)
14- 22 F9.5 km/s RV Radial velocity
24- 30 F7.5 km/s e_RV Uncertainty in RV
32- 38 F7.4 [-] logR'HK The logR'HK chromospheric activity value
40- 45 F6.4 [-] e_logR'HK Uncertainty in logR'HK
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Byte-by-byte Description of file: spitzer.dat
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Bytes Format Units Label Explanations
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1- 14 F14.6 d BJD Barycentric Julian Data (UTC),
middle of the 64 subarray exposures.
16- 22 F7.5 --- Flux Normalized flux
24- 30 F7.5 --- e_Flux Normalized flux error
32- 38 F7.4 pix Xpos X position
40- 46 F7.4 pix Ypos Y position
48- 54 F7.4 pix FWHMX PSF Full-Width at Half-Maximum along X
56- 62 F7.4 pix FWHMY PSF Full-Width at Half-Maximum along Y
64- 68 F5.2 --- Bg Background (in ADU units)
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Acknowledgements:
Fatemeh Motalebi, Fatemeh.Motalebi(at)unige.ch
(End) Patricia Vannier [CDS] 15-Oct-2015