HELIOS-K released (ultrafast opacity calculator)
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. (It is hard to do a comparison, because most of these codes are proprietary and the computational times taken are not published and are obtained via private communication.) The manuscript has been submitted to the Astrophysical Journal; the submitted version is available for download in the "Papers" section of the website (Grimm & Heng 2015). The CUDA source code will be publicly available as soon as we have cleaned up some loose ends.