RoadRunner: a fast and flexible exoplanet transit model

Parviainen, H.
Bibliographical reference

Monthly Notices of the Royal Astronomical Society

Advertised on:
9
2020
Number of authors
1
IAC number of authors
1
Citations
3
Refereed citations
3
Description
I present RoadRunner, a fast exoplanet transit model that can use any radially symmetric function to model stellar limb darkening (LD) while still being faster to evaluate than the analytical transit model for quadratic LD by Mandel & Agol. CPU and GPU implementations of the model are available in the PYTRANSIT transit modelling package, and come with platform-independent parallelization, supersampling, and support for modelling complex heterogeneous time series. The code is written in NUMBA-accelerated PYTHON (and the GPU model in OPENCL) without C or FORTRAN dependencies, which allows for the LD model to be given as any PYTHON-callable function. Finally, as an example of the flexibility of the approach, the latest version of PYTRANSIT comes with a numerical limb darkening model that uses LDTK-generated limb darkening profiles directly without approximating them by analytical models.
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Exoplanets and Astrobiology

The search for life in the universe has been driven by recent discoveries of planets around other stars (known as exoplanets), becoming one of the most active fields in modern astrophysics. The growing number of new exoplanets discovered in recent years and the recent advance on the study of their atmospheres are not only providing new valuable

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