%0 Generic %1 Hirano2009 %A Hirano, Teruyuki %A Suto, Yasushi %A Taruya, Atsushi %A Narita, Norio %A Sato, Bun'ei %A Johnson, John Asher %A Winn, Joshua N. %D 2009 %K imported %T Analytic Description of the Rossiter-McLaughlin Effect for Transiting Exoplanets: Cross-Correlation Method and Comparison with Simulated Data %U http://arxiv.org/abs/0910.2365 %X We obtain analytical expressions for the velocity anomaly due to the Rossiter-McLaughlin effect, for the case when the anomalous radial velocity is obtained by cross-correlation with a stellar template spectrum. In the limit of vanishing width of the stellar absorption lines, our result reduces to the formula derived by Ohta et al. (2005), which is based on the first moment of distorted stellar lines. Our new formula contains a term dependent on the stellar linewidth, which becomes important when rotational line broadening is appreciable. We generate mock transit spectra for the exoplanetary systems HD17156 and TrES-4 following the procedure of Winn et al. (2005), and find that the new formula is in better agreement with the velocity anomaly extracted from the mock data. Thus, our result provides a more reliable analytical description of the velocity anomaly due to the Rossiter-McLaughlin effect, and explains the previously observed dependence of the velocity anomaly on the stellar rotation velocity.

@misc{Hirano2009, abstract = { We obtain analytical expressions for the velocity anomaly due to the Rossiter-McLaughlin effect, for the case when the anomalous radial velocity is obtained by cross-correlation with a stellar template spectrum. In the limit of vanishing width of the stellar absorption lines, our result reduces to the formula derived by Ohta et al. (2005), which is based on the first moment of distorted stellar lines. Our new formula contains a term dependent on the stellar linewidth, which becomes important when rotational line broadening is appreciable. We generate mock transit spectra for the exoplanetary systems HD17156 and TrES-4 following the procedure of Winn et al. (2005), and find that the new formula is in better agreement with the velocity anomaly extracted from the mock data. Thus, our result provides a more reliable analytical description of the velocity anomaly due to the Rossiter-McLaughlin effect, and explains the previously observed dependence of the velocity anomaly on the stellar rotation velocity. }, added-at = {2009-10-24T20:50:29.000+0200}, author = {Hirano, Teruyuki and Suto, Yasushi and Taruya, Atsushi and Narita, Norio and Sato, Bun'ei and Johnson, John Asher and Winn, Joshua N.}, biburl = {https://www.bibsonomy.org/bibtex/296e71c95ae12078e4168c8126878d646/weisep}, description = {Analytic Description of the Rossiter-McLaughlin Effect for Transiting Exoplanets: Cross-Correlation Method and Comparison with Simulated Data}, interhash = {0588cf7d466878c442a9d5e9b651b799}, intrahash = {96e71c95ae12078e4168c8126878d646}, keywords = {imported}, note = {cite arxiv:0910.2365 Comment: 30 pages, 7 figures, submitted to Astrophysical Journal}, timestamp = {2009-10-24T20:50:52.000+0200}, title = {Analytic Description of the Rossiter-McLaughlin Effect for Transiting Exoplanets: Cross-Correlation Method and Comparison with Simulated Data}, url = {http://arxiv.org/abs/0910.2365}, year = 2009 }