Downloading model grids

Sonora

Currently we only support the 2018 Sonora Model grids. In a web browser, navigate to the Sonora 2018 Zenodo website. Click on the Download button next to spectra.tar     1.2 GB. That will download the spectra.tar file to your ~/Downloads/ directory or equivalent default location. Untar that directory. The pattern should look something like below, depending on what your operating system defaults are, so copy-ing and past-ing this code is not likely to work— try each step at a time.

tar -xzvf spectra.tar
mv spectra ~/libraries/raw/Sonora

The end result should look something like this:

$ ls ~/libraries/raw/Sonora/
            [...]
sp_t2100g3160nc_m0.0.gz  sp_t450g316nc_m0.0.gz    sp_t950g31nc_m0.0.gz
sp_t2100g316nc_m0.0.gz   sp_t450g31nc_m0.0.gz     sp_t950g562nc_m0.0.gz
sp_t2100g31nc_m0.0.gz    sp_t450g562nc_m0.0.gz    sp_t950g56nc_m0.0.gz
            [...]

PHOENIX

Note

Downloading all the PHOENIX models can take hours or days! Start the downloading early.

The PHOENIX models total over 100 GB, and generally download at a relatively slow bandwidth. The files are arranged into sub-directories for metallicity and alpha-element abundance.

You can get all of the PHOENIX models in one-fell-swoop from the command line if you have wget

cd ~/Downloads
wget -r -l 0 ftp://phoenix.astro.physik.uni-goettingen.de/HiResFITS/

If you don’t have wget on your computer, please help the gollum grow by filing a GitHub Issue with how you resolved the problem, or what problems you are encountering.

As noted, this process will take a while as each individual file is painstakingly downloaded from a single German computer. The commandline script, as written, will preserve the directory structure— that’s good! The gollum code demands that the directory structure is preserved. Once it’s all downloaded it should look like this

# From inside this directory: ~/Downloads/phoenix.astro.physik.uni-goettingen.de/
$ tree
.
└── HiResFITS
    ├── PHOENIX-ACES-AGSS-COND-2011
    │   └── Z-0.0
    │       ├── lte02300-0.00-0.0.PHOENIX-ACES-AGSS-COND-2011-HiRes.fits
    │       ├── lte02300-0.50-0.0.PHOENIX-ACES-AGSS-COND-2011-HiRes.fits
    │       ├── lte02300-1.00-0.0.PHOENIX-ACES-AGSS-COND-2011-HiRes.fits
    │       ├── lte02300-1.50-0.0.PHOENIX-ACES-AGSS-COND-2011-HiRes.fits
                                    [ ... ]
    │       ├── lte04000-2.50-0.0.PHOENIX-ACES-AGSS-COND-2011-HiRes.fits
    │       ├── lte04000-3.00-0.0.PHOENIX-ACES-AGSS-COND-2011-HiRes.fits
    │       └── lte04000-3.50-0.0.PHOENIX-ACES-AGSS-COND-2011-HiRes.fits
    │                                [ ... ]
    │    ├── Z-0.0
    │    ├── Z+0.5
    │    ├── Z-0.5
    │    ├── Z+1.0
    │    ├── Z-1.0
    │    ├── Z-1.5
    │    ├── Z-2.0
    │    ├── Z-3.0
    │    └── Z-4.0
    └── WAVE_PHOENIX-ACES-AGSS-COND-2011.fits

While you could leave these directories in say ~/Downloads/phoenix.astro.physik.uni-goettingen.de/, I recommend making a more permanent and recognizable home for these models. In particular gollum attempts to search a single default path for models: ~/libraries/raw/, where the tilde ~/ denotes your home directory

mv ~/Downloads/phoenix.astro.physik.uni-goettingen.de/HiResFITS/PHOENIX-ACES-AGSS-COND-2011 ~/libraries/raw/PHOENIX/
ls ~/libraries/raw/PHOENIX/
Z-0.0  Z+0.5  Z-0.5  Z+1.0  Z-1.0  Z-1.5  Z-2.0  Z-3.0  Z-4.0

Finally, you must copy the wavelength file into this directory as well. Notice that this placement breaks the native directory structure, so you must complete this step in order for gollum to work.

mv ~/Downloads/phoenix.astro.physik.uni-goettingen.de/HiResFITSWAVE_PHOENIX-ACES-AGSS-COND-2011.fits ~/libraries/raw/PHOENIX/
ls ~/libraries/raw/PHOENIX/
WAVE_PHOENIX-ACES-AGSS-COND-2011.fits  Z-0.0  Z+0.5  Z-0.5  Z+1.0  Z-1.0  Z-1.5  Z-2.0  Z-3.0  Z-4.0