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CaRM:探索彩色Rossiter-McLaughlin效果。HD 189733 b和WASP-127 b的病例

CaRM: Exploring the chromatic Rossiter-McLaughlin effect. The cases of HD 189733b and WASP-127b

E. Cristo, N. C. Santos, O. Demangeon, J. H. C. Martins, P. Figueira, N. Casasayas-Barris, M. R. Zapatero Osorio, F. Borsa, S. G. Sousa, M. Oshagh, G. Micela, H… 展开作者

E. Cristo, N. C. Santos, O. Demangeon, J. H. C. Martins, P. Figueira, N. Casasayas-Barris, M. R. Zapatero Osorio, F. Borsa, S. G. Sousa, M. Oshagh, G. Micela, H. M. Tabernero, J. V. Seidel, S. Cristiani, F. Pepe, R. Rebolo, V. Adibekyan, R. Allart, Y. Alibert, T. Azevedo Silva, V. Bourrier, A. Cabral, E. Esparza Borges, J. I. González Hernández, J. Lillo-Box, G. Lo Curto, C. Lovis, A. Manescau, P. Di Marcantonio, C. J. A. P. Martins, A. S. Mascareño, D. Mégevand, A. Mehner, N. J. Nunes, E. Palle, A. Sozzetti, S. Udry

摘要:

在本文中,我们介绍了CaRM,半自动代码的宽带透射光谱的凌日行星通过彩色罗斯特-麦克劳克林方法的检索。我们将其应用于两颗系外行星的HARPS和ESTERO观测,以检索透射谱,我们分析其拟合的传输模型。我们使用了强烈的半径依赖性的罗西特-麦克劳克林(RM)效应振幅,引起的行星同伴,测量表观半径变化引起的系外行星大气。为了检索的透射光谱,径向速度,这是计算的波长箱,包括几个光谱的顺序,被用来同时拟合开普勒运动和RM效果。由此,半径比被计算为波长的函数,这使得人们能够检索给定系外行星的低分辨率宽带透射光谱。CaRM提供了使用从ARoME和PyAstronomy中提取的两个Rossiter-McLaughlin模型的可能性,该模型与开普勒函数相关联,以在过境观测期间自动拟合径向速度。此外,它提供了使用一些方法的可能性,这些方法在理论上可以减轻过境期间径向速度扰动的影响。CaRM代码允许使用最少的用户交互来检索给定系外行星的透射光谱。我们证明,它允许一个计算低分辨率宽带传输光谱的系外行星观察到使用高分辨率光谱仪,如HARPS和ESTERO。

英文摘要:

In this paper we introduce CaRM, a semi-automatic code for the retrieval of broadband transmission spectra of transiting planets through the chromatic Rossiter-McLaughlin method. We applied it to HARPS and ESPRESSO observations of two exoplanets to retrieve the transmission spectrum and we analyze its fitting transmission models. We used the strong radius dependence of the Rossiter-McLaughlin (RM) effect amplitude, caused by planetary companions, to measure the apparent radius change caused by the exoplanet atmosphere. In order to retrieve the transmission spectrum, the radial velocities, which were computed over wavelength bins that encompass several spectral orders, were used to simultaneously fit the Keplerian motion and the RM effect. From this, the radius ratio was computed as a function of the wavelength, which allows one to retrieve the low-resolution broadband transmission spectrum of a given exoplanet. CaRM offers the possibility to use two Rossiter-McLaughlin models taken from ARoME and PyAstronomy, associated with a Keplerian function to fit radial velocities during transit observations automatically. Furthermore it offers the possibility to use some methods that could, in theory, mitigate the effect of perturbation in the radial velocities during transits. The CaRM code allows one to retrieve the transmission spectrum of a given exoplanet using minimal user interaction. We demonstrate that it allows one to compute the low-resolution broadband transmission spectra of exoplanets observed using high-resolution spectrographs such as HARPS and ESPRESSO.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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