115 lines
4.1 KiB
Text
115 lines
4.1 KiB
Text
######################
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# GENERAL PARAMETERS #
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######################
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# Plummer softening parameter (can be even 0)
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eps = 1E-4
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# End time of the calculation
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t_end = 0.25
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# Interval of snapshot files output (xxxxxx.dat)
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dt_disk = 1.0
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# Interval for the energy control output (contr.dat)
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dt_contr = 0.125
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# Interval for SMBH output (bh.dat, bh_neighbors.dat, and bh_inf.dat)
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dt_bh = 0.125
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# Parameter for timestep determination
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eta = 0.01
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# Name of the input file; use "data.con" in most cases
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inp_data = data.con
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##### NOT IMPLEMENTED #######################
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output_format = HDF5
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dt_min_warning = false
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#############################################
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####################
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# EXTERNAL GRAVITY #
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####################
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ext_units_physical = true
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norm_mass = 1e5
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norm_length = 10
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# TODO add the option to normalize using other units
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# Notice that if physical units are used, the "a" and "b" parameters are in kiloparsec, not parsec!
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ext_m_bulge = 1e5
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ext_b_bulge = 20
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ext_m_disk = 1e6
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ext_a_disk = 80
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ext_b_disk = 70
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ext_m_halo_plummer = 1e6
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ext_b_halo_plummer = 200.
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####################################
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## LIVE SUPERMASSIVE BLACK HOLE(S) #
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####################################
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#
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## There is special treatment for particles representing supermassive black holes (SMBHs): they are integrated at every time step, they can have custom softening in SMBH-SMBH interactions, and post Newtonian terms can be added to the gravity.
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#
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## The number of SMBH particles. Can be 0 (no SMBH), 1, or 2. [default: 0]
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#live_smbh_count = 0
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#
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## Custom softening length for SMBH-SMBH interactions (can also be zero). If non-negative, the custom softening is applied. [default: -1]
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#live_smbh_custom_eps = 0
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#
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## Output additional diagnostics about live SMBHs. [default: false]
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##TODO# dt_bh
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#live_smbh_output = true
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#
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## Output additional diagnostics about the SMBH's (or SMBHs') nearest neighbours (number could be set as shown below). [default: false]
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#live_smbh_neighbor_output = true
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#
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## Number of nearest neighbours to the SMBH (or SMBHs) to include in output. [default: 10]
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#live_smbh_neighbor_number = 10
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#
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###################################
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## BINARY SUPERMASSIVE BLACK HOLE #
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###################################
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#
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## The following parameters can be set when `live_smbh_count` is 2.
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#
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## Output additional diagnostics about the SMBH's sphere of influence (size could be set as shown below). [default: false]
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#binary_smbh_influence_sphere_output = true
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#
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## The influence sphere is centred at the binary SMBH's centre of mass, and its radius is the semi-major axis of the binary times the factor below. [default: 10.0]
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#binary_smbh_influence_radius_factor = 3.162277660168379497918067e+03
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#
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## Add post Newtonian terms to SMBH-SMBH gravity. [default: false]
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#binary_smbh_pn = true
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#
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## A mask array (zeros and ones) determining whether or not to use specific post-Newtonian terms.
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## The elements represent {0, 1, 2, 2.5, 3, 3.5, spin}
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#pn_usage = {1, 1, 1, 1, 0, 0, 0}
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#
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## The speed of light in N-body units [default: 500]
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#pn_c = 477.12
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#
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#####################################
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## Negative powers of two #
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#####################################
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## -1 1/2 0.5 #
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## -2 1/4 0.25 #
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## -3 1/8 0.125 #
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## -4 1/16 0.0625 #
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## -5 1/32 0.03125 #
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## -6 1/64 0.015625 #
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## -7 1/128 0.0078125 #
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## -8 1/256 0.00390625 #
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## -9 1/512 0.001953125 #
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## -10 1/1024 0.0009765625 #
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## -11 1/2048 0.00048828125 #
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## -12 1/4096 0.000244140625 #
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## -13 1/8192 0.0001220703125 #
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## -14 1/16384 0.00006103515625 #
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## -15 1/32768 0.000030517578125 #
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## -16 1/65536 0.0000152587890625 #
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#####################################
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