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Stellar_flare_hits_HD_189733_b_(artist's_impression)

This artist's impression shows the hot Jupiter HD 189733b, as it passes in front of its parent star, as the latter is flaring, driving material away from the planet. The escaping atmosphere is seen silhouetted against the starlight. The surface of the star, which is around 80% the mass of the Sun, is based on observations of the Sun from NASA's Solar Dynamics Observatory.

Credit: NASA, ESA, L. Calçada, Solar Dynamics Observatory

Prof Suzanne Aigrain

Professor of Astrophysics

Research theme

  • Astronomy and astrophysics
  • Exoplanets and planetary physics

Sub department

  • Astrophysics

Research groups

  • Exoplanets and Stellar Physics
Suzanne.Aigrain@physics.ox.ac.uk
Telephone: 01865 (2)73339
Denys Wilkinson Building, room 762
Stars & Planets @ Oxford research group website
  • About
  • Publications

Transiting exoplanets from the CoRoT space mission I - CoRoT-Exo-1b: a low-density short-period planet around a G0V star

(2008)

Authors:

P Barge, A Baglin, M Auvergne, H Rauer, A Leger, J Schneider, F Pont, S Aigrain, J-M Almenara, R Alonso, M Barbieri, P Borde, F Bouchy, H-J Deeg, R De la Reza, M Deleuil, R Dvorak, A Erikson, M Fridlund, M Gillon, P Gondoin, T Guillot, A Hatzes, G Hebrard, L Jorda, P Kabath, H Lammer, A Llebaria, B Loeillet, P Magain, T Mazeh, C Moutou, M Ollivier, M Patzold, D Queloz, D Rouan, A Shporer, G Wuchterl
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Transiting exoplanets from the CoRoT space mission II. CoRoT-Exo-2b: A transiting planet around an active G star

(2008)

Authors:

R Alonso, M Auvergne, A Baglin, M Ollivier, C Moutou, D Rouan, HJ Deeg, S Aigrain, JM Almenara, M Barbieri, P Barge, W Benz, P Bordé, F Bouchy, R De la Reza, M Deleuil, R Dvorak, A Erikson, M Fridlund, M Gillon, P Gondoin, T Guillot, A Hatzes, G Hébrard, P Kabath, L Jorda, H Lammer, A Léger, A Llebaria, B Loeillet, P Magain, M Mayor, T Mazeh, M Pätzold, F Pepe, F Pont, D Queloz, H Rauer, A Shporer, J Schneider, B Stecklum, S Udry, G Wuchterl
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Transiting exoplanets from the CoRoT space mission III. The spectroscopic transit of CoRoT-Exo-2b with SOPHIE and HARPS

(2008)

Authors:

F Bouchy, D Queloz, M Deleuil, B Loeillet, AP Hatzes, S Aigrain, R Alonso, M Auvergne, A Baglin, P Barge, W Benz, P Bordé, HJ Deeg, R De la Reza, R Dvorak, A Erikson, M Fridlund, P Gondoin, T Guillot, G Hébrard, L Jorda, H Lammer, A Léger, A Llebaria, P Magain, M Mayor, C Moutou, M Ollivier, M Pätzold, F Pepe, F Pont, H Rauer, D Rouan, J Schneider, AHMJ Triaud, S Udry, G Wuchterl
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Reconstruction of the transit signal in the presence of stellar variability

(2008)

Authors:

Aude Alapini, Suzanne Aigrain
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The Monitor project: Rotation of low-mass stars in NGC 2362 - Testing the disc regulation paradigm at 5 Myr

Monthly Notices of the Royal Astronomical Society 384:2 (2008) 675-686

Authors:

J Irwin, S Hodgkin, S Aigrain, J Bouvier, L Hebb, M Irwin, E Moraux

Abstract:

We report on the results of a time-series photometric survey of NGC 2362, carried out using the CTIO 4-m Blanco telescope and Mosaic-II detector as part of the Monitor project. Rotation periods were derived for 271 candidate cluster members over the mass range 0.1 ≲ M/M⊙ ≲ 1.2. The rotation period distributions show a clear mass-dependent morphology, qualitatively similar to that in NGC 2264, as would be expected from the age of this cluster. Using models of angular momentum evolution, we show that angular momentum losses over the ∼1-5 Myr age range appear to be needed in order to reproduce the evolution of the slowest rotators in the sample from the ONC to NGC 2362, as found by many previous studies. By incorporating Spitzer IRAC mid-infrared (mid-IR) measurements, we found that three to four objects showing mid-IR excesses indicative of the presence of circumstellar discs were all slow rotators, as would be expected in the disc regulation paradigm for early pre-main-sequence angular momentum evolution, but this result is not statistically significant at present, given the extremely limited sample size. © 2008 RAS.
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