Encyclopedia of Astrobiology

2015 Edition
| Editors: Muriel Gargaud, William M. Irvine, Ricardo Amils, Henderson James (Jim) CleavesII, Daniele L. Pinti, José Cernicharo Quintanilla, Daniel Rouan, Tilman Spohn, Stéphane Tirard, Michel Viso

Rossiter-McLaughlin Effect

Reference work entry
DOI: https://doi.org/10.1007/978-3-662-44185-5_5308


The Rossiter-McLaughlin (RM) effect is a spectroscopic effect that occurs in a stellar system with a transiting planet. In such a system, in addition to the photometric effect of the transiting planet which manifests itself as a decrease in the flux received from the star, the obscuration of the disk of the star during the transit causes changes in the disk-integrated spectrum of the star known as the Rossiter-McLaughlin (RM) effect. As a star rotates, the portion of its disk that approaches the observer will have its spectrum  Doppler shiftedto shorter wavelengths (to the blue), whereas the portion that rotates away from the observer will be red shifted. When a planet transits the star, its passage in front of the star’s disk disturbs the abovementioned star’s rotational Doppler shift. When the planet blocks the blue-shifted part, the spectrum appears slightly red shifted. The situation is reversed when the planet covers a portion of the red-shifted segment of the stellar...
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References and Further Reading

  1. Alonso R, Auvergne M, Baglin A et al (2008) Transiting exoplanets from the CoRoT space mission. II. CoRoT-Exo-2b: a transiting planet around an active G star astron. Astrophysics 482:L21Google Scholar
  2. Bouchy F, Queloz D, Deleuil M et al (2008) Transiting exoplanets from the CoRoT space mission. III. The spectroscopic transit of CoRoT-Exo-2b with SOPHIE and HARPS. Astron Astrophysics 482:L25CrossRefADSGoogle Scholar
  3. Bundy KA, Marcy GW (2000) A search for transit effects in spectra of 51 pegasi and HD 209458. PASP 112:1421CrossRefADSGoogle Scholar
  4. Forbes G (1911) Rotation of star about their axes. MNRAS 71:578ADSGoogle Scholar
  5. Gaudi BS, Winn JN (2007) Prospects for the characterization and confirmation of transiting exoplanets via the Rossiter-McLaughlin effect. Astrophys J 655:550CrossRefADSGoogle Scholar
  6. McLaughlin DB (1924) Some results of a spectrographic study of the Algol system. Astrophys J 60:22CrossRefADSGoogle Scholar
  7. Queloz D, Eggenberger A, Mayor M, Perrier C, Beuzit JL, Naef D, Sivan JP, Udry S (2000) Detection of a spectroscopic transit by the planet orbiting the star HD209458. Astron Astrophys 359:L13ADSGoogle Scholar
  8. Rossiter RA (1924) On the detection of an effect of rotation during eclipse in the velocity of the brighter component of beta Lyrae, and on the constancy of velocity of this system. Astrophys J 60:15CrossRefADSGoogle Scholar
  9. Schlesinger F (1911) Rotation of stars about their axes. MNRAS 71:719CrossRefADSGoogle Scholar
  10. Winn JN et al (2006) Measurement of the spin-orbit alignment in the exoplanetary system HD 189733. Astrophys J 653:L69CrossRefADSGoogle Scholar
  11. Winn JN et al (2009a) On the spin-orbit misalignment of the XO-3 exoplanetary system. Astrophys J 700:302CrossRefADSGoogle Scholar
  12. Winn JN et al (2009b) HAT-P-7: a retrograde or polar orbit, and a third body. Astrophys J 703:L99CrossRefADSGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.Institute for AstronomyUniversity of Hawaii–ManoaHonolulu, HawaiiUSA