Imperial College London
Dr Yvonne Unruh

DrYvonneUnruh

Faculty of Natural Sciences, Department of Physics

Reader in Astrophysics
 
 
 
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Contact

 

y.unruh Website

 
 
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Location

 

1114Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@inproceedings{Haywood:2013:10.1017/S1743921313008478,
author = {Haywood, RD and Cameron, AC and Queloz, D and Barros, SCC and Deleuil, M and Fares, R and Gillon, M and Hatzes, A and Lanza, AF and Lovis, C and Moutou, C and Pepe, F and Pollacco, D and Santerne, A and Ségransan, D and Unruh, Y},
doi = {10.1017/S1743921313008478},
pages = {237--240},
title = {Planets and stellar activity: Hide and seek in the CoRoT-7 system},
url = {http://dx.doi.org/10.1017/S1743921313008478},
year = {2013}
}
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RIS format (EndNote, RefMan)

TY  - CPAPER
AB  - Since the discovery of the transiting Super-Earth CoRoT-7b, several investigations have been made of the number and precise masses of planets present in the system, but they all yield different results, owing to the star's high level of activity. Radial velocity (RV) variations induced by stellar activity therefore need to be modelled and removed to allow a reliable detection of all planets in the system. We re-observed CoRoT-7 in January 2012 with both HARPS and the CoRoT satellite, so that we now have the benefit of simultaneous RV and photometric data. We fitted the off-transit variations in the CoRoT lightcurve using a harmonic decomposition similar to that implemented in Queloz et al. (2009). This fit was then used to model the stellar RV contribution, according to the methods described by Aigrain et al. (2011). This model was incorporated into a Monte Carlo Markov Chain in order to make a precise determination of the orbits of CoRoT-7b and CoRoT-7c. We also assess the evidence for the presence of one or two additional planetary companions. Copyright © 2013, International Astronomical Union.
AU  - Haywood,RD
AU  - Cameron,AC
AU  - Queloz,D
AU  - Barros,SCC
AU  - Deleuil,M
AU  - Fares,R
AU  - Gillon,M
AU  - Hatzes,A
AU  - Lanza,AF
AU  - Lovis,C
AU  - Moutou,C
AU  - Pepe,F
AU  - Pollacco,D
AU  - Santerne,A
AU  - Ségransan,D
AU  - Unruh,Y
DO  - 10.1017/S1743921313008478
EP  - 240
PY  - 2013///
SN  - 1743-9213
SP  - 237
TI  - Planets and stellar activity: Hide and seek in the CoRoT-7 system
UR  - http://dx.doi.org/10.1017/S1743921313008478
ER  -
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