HELIOS is a software suite that describes the passage of radiation through an exoplanetary atmosphere, including the calculation of synthetic spectra. It includes a solver of the radiative transfer equation (HELIOS), an ultra-fast tool to compute the opacity function of the atmosphere via k-distribution tables (HELIOS-K) and an atmospheric retrieval code (HELIOS-R).
The source code is available for you on GitHub to download and contribute to our project: HELIOS
A first version of HELIOS is released and available for download in the "Source Code" section, which provides a link to the GitHub repository. The corresponding publication describing the method and first applications of the code can be found on arXiv (see "Links" section).
A poster explaining the first version of HELIOS-R, our retrieval code for atmosphere charaterisation. We focus on emission spectra and coupled our forward model with a nested sampling algorithm. The poster will be on display at the Extreme Solar Systems III conference in Hawaii, 29 Nov. – 4 Dec. 2015.
A new poster for HELIOS is available. Therein we describe the radiative transfer model, the key features of the numerical code and preliminary results. We show a few numerical tests and a comparison to current data for the exoplanets HD189733b and Wasp-43b. The poster will be on display at the Extreme Solar Systems III conference in Hawaii, 29 Nov. – 4 Dec. 2015.
Real-time 1D radiative transfer computation with the code HELIOS. We start with an isothermal atmosphere and iterate for the temperature until radiative equilibrium in all the atmospheric layers is established. Here, we model the Super-Earth GJ1214b. The stellar irradiation is averaged over the day-hemisphere.
Our method paper on HELIOS-K (Grimm & Heng 2015) has been accepted by the Astrophysical Journal for publication.
HELIOS-K is available for download in the "Source Code" section, which provides a link to GitHub.com. The research paper, which has been submitted to the Astrophysical Journal, is available in the "Papers" section (Grimm & Heng 2015).
We have just released our initial version of HELIOS-K, which is an ultrafast opacity calculator that takes a line list as an input and computes the line shapes of an arbitrary number of spectral lines (~millions to billions). HELIOS-K is capable of computing 100,000 spectral lines in 1 second, orders of magnitude faster than most other codes on the market.