Stellar spectral analysis package. FASMA delivers the atmospheric stellar parameters (effective temperature, surface gravity, metallicity, microturbulence, macroturbulence, rotational velocity) and chemical abundances of 12 elements.
The python code is wrapped around the spectral synthesis package in fortran: MOOG.
Contact here for bugs: tsantaki@arcetri.astro.it
Installing FASMA requires a few simple steps.
Run the makefile file with
make install
A list of basic packages will be installed automatically with pip (see requirements.txt). It requires sudo privilege otherwise correct the makefile with pip install --user instead of sudo pip install.
FASMA requires MOOG which creates the synthetic spectra and it is installed separately from FASMA but it is provided in
the FASMA/MOOG folder. To install MOOG, edit line 29 of the Moogsilent.f in the FASMA/MOOG folder.
Then depending on the system, compile:
make -f Makefile.xxx
where xxx = "rh64silent", "rhsilent", "maclapselent", "macdesksilent".
More instructions are here. FASMA runs with python 3.
FASMA is so easy. You can run FASMA from the terminal by configuring the options in the StarMe_synth.cfg file
and then run in the working directory:
fasma
A small tutorial is given here
FASMA includes a log file captain.log every time it is used which catches errors in order to inform the user.
A standard setting of the configuration file has this form with the correct paths (see manual for more information):
linelist teff logg [M/H] vt vmac vsini options
\home\star\rawLinelist\linelist.lst 5777 4.44 0.0 1.0 3.21 1.9 observations:\home\star\spectra\Sun_HARPS.fits,resolution:115000,inter_file:\home\star\rawLinelist\intervals.lst,minimize,refine
The line list and the initial stellar parameters (teff logg [M/H] vt vmac vsini) are space separated. The options are comma separated (e.g. minimize,damping:1,plot).
The default options of FASMA can be changed in the configuration file StarMe_synth.cfg.
spt: False
model: marcs
MOOGv: 2017
save: False
fix_teff: False
fix_logg: False
fix_feh: False
fix_vt: False
fix_vmac: False
fix_vsini: False
plot: False
plot_res: False
damping: 1
step_wave: 0.01
step_flux: 3.0
minimize: False
element: False
refine: False
observations: False
inter_file: intervals.lst
snr: None
resolution: None
limb: 0.6
FASMA includes the line list for the derivation of stellar parameters (giraffe_sun_arcturus_calib.lst), the list of the spectral regions for the spectral synthesis (intervals.lst) as tested in Tsantaki et al. (2018). For the chemical abundance determination, FASMA incorporates the line list of 12 elements (elements.lst) and the intervals (intervals_elements.lst) from Adibekyan et al. (2015) . The above lists are in the rawLinelist folder. The correct paths should be provided in the StarMe_synth.cfg file.
Assuming FASMA works well, the delivered stellar parameters are saved in the synthresults.dat and for the
chemical abundances in the synthresults_elements.dat. The model atmosphere produced by the interpolation from
the model grid is created in the out.atm file. The output synthetic spectrum of MOOG is in summary.out. The
linelist.moog contains the line list in the format of MOOG and result.out is the summary of the parameters used
for the synthetic spectrum. The MOOG configuration file is batch.par and its options are also set from the StarMe_synth.cfg file.