Research notes

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This is a temporary page created to note my miscellaneous research notes for future reference. - Abhay

UV Scattering program details: Main program: - voyager-main.c Run command : - cc -o voyager.e voyager.c ran2.c nr.c nrutil.c parsepar.c -lcfitsio -lm -lnsl new one:-

gcc -o voyager.e voyager.c ran2.c nrutil.c parse_par.c -lcfitsio -lm -lnsl

Associated files:- ran2.c :- random number generator nr.c :- not used

nrutil.c :-

parse_par.c :- file used to take inputs from the parameter file into the main program.

par_file.txt:- names of the stars list file, wavelengths file and dust file.

2dsheet28_130:- the dust file. it begins with RA DEC, Initial cell numbers in x,y,z, total cell numbers. followed by the rotation matrix and the dust density.

run_prog : - perl file to :- remove previous .fit file, take a star distribution file, run voyager.e with parameters of number of photons, wavelength, albedo and phase function asymmetry factor. It then copies the program output .fit file to the selected name of .fit file.

dust_model.pro : - This program contains the coalsack CO column density and the remaining medium has the correct density assuming the results of Corradi et. al. for 28 degrees.  :- program used to create the dust distribution file named as '2dsheet28_130'. The writing of the dust cells is exactly matching to the readout in voyager.c

Project:- effect of single and multiple scattering on the simulation outcome for different optical depths. Using two geometries, one with star in front of dust volume and other with star embedded in the dust.

Procedure:- creating the geometry using the dust_model.pro, running the program for various optical depths by changing the dust density, tabulating the UV flux for various optical depths in both single and multiple scattering cases.