Disentangling planetary orbits from stellar activity in radial-velocity surveys

R.D. Haywood; A.C. Cameron; D. Queloz; S.C.C. Barros; M. Deleuil; R. Fares; M. Gillon; A. Hatzes; A.F. Lanza; C. Lovis; C. Moutou; F. Pepe; D. Pollacco; A. Santerne; D. Ségransan; Y. Unruh

doi:10.1017/S147355041300044X

Disentangling planetary orbits from stellar activity in radial-velocity surveys

R.D. Haywood, A.C. Cameron, D. Queloz, S.C.C. Barros, M. Deleuil, R. Fares, M. Gillon, A. Hatzes, A.F. Lanza, C. Lovis, C. Moutou, F. Pepe, D. Pollacco, A. Santerne, D. Ségransan, Y. Unruh

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

The majority of extra-solar planets have been discovered (or confirmed after follow-up) through radial-velocity (RV) surveys. Using ground-based spectrographs such as High Accuracy Radial Velocity Planetary Search (HARPS) and HARPS-North, it is now possible to detect planets that are only a few times the mass of the Earth. However, the presence of dark spots on the stellar surface produces RV signals that are very similar in amplitude to those caused by orbiting low-mass planets. Disentangling these signals has thus become the biggest challenge in the detection of Earth-mass planets using RV surveys. To do so, we use the star's lightcurve to model the RV variations produced by spots. Here we present this method and show the results of its application to CoRoT-7.

Original language	English
Pages (from-to)	155-157
Number of pages	3
Journal	International Journal of Astrobiology
Volume	13
Issue number	2
Early online date	14 Jan 2014
DOIs	https://doi.org/10.1017/S147355041300044X
Publication status	Published - 1 Apr 2014

Keywords

Astronomy
Detection of Earth-mass planets
Stellar activity
Study of individual planetary systems: CoRoT-7
Techniques: radial velocities

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10.1017/S147355041300044X

Cameron_2014_IJA_Disentangling
© Cambridge University Press 2014
Final published version, 261 KB

Astrophysics at St Andrews:2012 - 2014: Astrophysics at St Andrews: 2012 - 2014
Horne, K. D. (PI)
Science & Technology Facilities Council
1/10/11 → 31/03/12
Project: Standard
Wide Area Search for Planets: Project support for the Wide Area Search for Planets
Cameron, A. C. (PI)
Science & Technology Facilities Council
1/08/08 → 31/07/11
Project: Standard

Cite this

Haywood, R. D., Cameron, A. C., Queloz, D., Barros, S. C. C., Deleuil, M., Fares, R., Gillon, M., Hatzes, A., Lanza, A. F., Lovis, C., Moutou, C., Pepe, F., Pollacco, D., Santerne, A., Ségransan, D., & Unruh, Y. (2014). Disentangling planetary orbits from stellar activity in radial-velocity surveys. International Journal of Astrobiology, 13(2), 155-157. https://doi.org/10.1017/S147355041300044X

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title = "Disentangling planetary orbits from stellar activity in radial-velocity surveys",

abstract = "The majority of extra-solar planets have been discovered (or confirmed after follow-up) through radial-velocity (RV) surveys. Using ground-based spectrographs such as High Accuracy Radial Velocity Planetary Search (HARPS) and HARPS-North, it is now possible to detect planets that are only a few times the mass of the Earth. However, the presence of dark spots on the stellar surface produces RV signals that are very similar in amplitude to those caused by orbiting low-mass planets. Disentangling these signals has thus become the biggest challenge in the detection of Earth-mass planets using RV surveys. To do so, we use the star's lightcurve to model the RV variations produced by spots. Here we present this method and show the results of its application to CoRoT-7.",

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author = "R.D. Haywood and A.C. Cameron and D. Queloz and S.C.C. Barros and M. Deleuil and R. Fares and M. Gillon and A. Hatzes and A.F. Lanza and C. Lovis and C. Moutou and F. Pepe and D. Pollacco and A. Santerne and D. S{\'e}gransan and Y. Unruh",

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Haywood, RD, Cameron, AC, Queloz, D, Barros, SCC, Deleuil, M, Fares, R, Gillon, M, Hatzes, A, Lanza, AF, Lovis, C, Moutou, C, Pepe, F, Pollacco, D, Santerne, A, Ségransan, D & Unruh, Y 2014, 'Disentangling planetary orbits from stellar activity in radial-velocity surveys', International Journal of Astrobiology, vol. 13, no. 2, pp. 155-157. https://doi.org/10.1017/S147355041300044X

TY - JOUR

T1 - Disentangling planetary orbits from stellar activity in radial-velocity surveys

AU - Haywood, R.D.

AU - Cameron, A.C.

AU - Queloz, D.

AU - Barros, S.C.C.

AU - Deleuil, M.

AU - Fares, R.

AU - Gillon, M.

AU - Hatzes, A.

AU - Lanza, A.F.

AU - Lovis, C.

AU - Moutou, C.

AU - Pepe, F.

AU - Pollacco, D.

AU - Santerne, A.

AU - Ségransan, D.

AU - Unruh, Y.

PY - 2014/4/1

Y1 - 2014/4/1

N2 - The majority of extra-solar planets have been discovered (or confirmed after follow-up) through radial-velocity (RV) surveys. Using ground-based spectrographs such as High Accuracy Radial Velocity Planetary Search (HARPS) and HARPS-North, it is now possible to detect planets that are only a few times the mass of the Earth. However, the presence of dark spots on the stellar surface produces RV signals that are very similar in amplitude to those caused by orbiting low-mass planets. Disentangling these signals has thus become the biggest challenge in the detection of Earth-mass planets using RV surveys. To do so, we use the star's lightcurve to model the RV variations produced by spots. Here we present this method and show the results of its application to CoRoT-7.

AB - The majority of extra-solar planets have been discovered (or confirmed after follow-up) through radial-velocity (RV) surveys. Using ground-based spectrographs such as High Accuracy Radial Velocity Planetary Search (HARPS) and HARPS-North, it is now possible to detect planets that are only a few times the mass of the Earth. However, the presence of dark spots on the stellar surface produces RV signals that are very similar in amplitude to those caused by orbiting low-mass planets. Disentangling these signals has thus become the biggest challenge in the detection of Earth-mass planets using RV surveys. To do so, we use the star's lightcurve to model the RV variations produced by spots. Here we present this method and show the results of its application to CoRoT-7.

KW - Astronomy

KW - Detection of Earth-mass planets

KW - Stellar activity

KW - Study of individual planetary systems: CoRoT-7

KW - Techniques: radial velocities

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DO - 10.1017/S147355041300044X

M3 - Article

AN - SCOPUS:84898724333

SN - 1473-5504

VL - 13

SP - 155

EP - 157

JO - International Journal of Astrobiology

JF - International Journal of Astrobiology

IS - 2

ER -

Disentangling planetary orbits from stellar activity in radial-velocity surveys

Abstract

Keywords

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Projects

Astrophysics at St Andrews:2012 - 2014: Astrophysics at St Andrews: 2012 - 2014

Wide Area Search for Planets: Project support for the Wide Area Search for Planets

Cite this