rail.interactive.creation.engines.fsps_sed_modeler module

rail.interactive.creation.engines.fsps_sed_modeler.fsps_sed_modeler(**kwargs)

Derived class of Modeler for creating a single galaxy rest-frame SED model using FSPS (Conroy08).

Only the most important parameters are provided via config_options. The remaining ones from FSPS can be provided when creating the rest-frame SED model.

Install FSPS with the following commands:

 pip uninstall fsps
git clone --recursive https://github.com/dfm/python-fsps.git
cd python-fsps
python -m pip install .
export SPS_HOME=$(pwd)/src/fsps/libfsps

—

This function creates rest-frame SED models from an input galaxy population catalog.

—

This function was generated from the function rail.creation.engines.fsps_sed_modeler.FSPSSedModeler.fit_model

Parameters:

• input_data (dict, required) – This is the input catalog in the form of an Hdf5Handle.

• chunk_size (int, optional) – Number of objects per chunk for parallel processing or to evalute per loop in single node processing Default: 10000

• hdf5_groupname (str, optional) – name of hdf5 group for data, if None, then set to ‘’ Default: photometry

• compute_vega_mags (bool, optional) – True uses Vega magnitudes versus AB magnitudes Default: False

• vactoair_flag (bool, optional) – If True, output wavelengths in air (rather than vac) Default: False

• zcontinuous (int, optional) – Flag for interpolation in metallicity of SSP before CSP Default: 1

• add_agb_dust_model (bool, optional) – Turn on/off adding AGB circumstellar dust contribution to SED Default: True

• add_dust_emission (bool, optional) – Turn on/off adding dust emission contribution to SED Default: True

• add_igm_absorption (bool, optional) – Turn on/off adding IGM absorption contribution to SED Default: False

• add_neb_emission (bool, optional) – Turn on/off nebular emission model based on Cloudy Default: False

• add_neb_continuum (bool, optional) – Turn on/off nebular continuum component Default: False

• add_stellar_remnants (bool, optional) – Turn on/off adding stellar remnants contribution to stellar mass Default: True

• compute_light_ages (bool, optional) – If True then the returned spectra are actually light-weighted ages (in Gyr) Default: False

• nebemlineinspec (bool, optional) – True to include emission line fluxes in spectrum Default: False

• smooth_velocity (bool, optional) – True/False for smoothing in velocity/wavelength space Default: True

• smooth_lsf (bool, optional) – True/False for smoothing SSPs by a wavelength dependent line spread function Default: False

• cloudy_dust (bool, optional) – Switch to include dust in the Cloudy tables Default: False

• agb_dust (float, optional) – Scales the circumstellar AGB dust emission Default: 1.0

• tpagb_norm_type (int, optional) – Flag for TP-AGB normalization scheme, default Villaume, Conroy, Johnson 2015 normalization Default: 2

• dell (float, optional) – Shift in log(L_bol) of the TP-AGB isochrones Default: 0.0

• delt (float, optional) – Shift in log(T_eff) of the TP-AGB isochrones Default: 0.0

• redgb (float, optional) – Modify weight given to RGB. Only available with BaSTI isochrone set Default: 1.0

• agb (float, optional) – Modify weight given to TP-AGB Default: 1.0

• fcstar (float, optional) – Fraction of stars that the Padova isochrones identify as Carbon stars Default: 1.0

• sbss (float, optional) – Specific frequency of blue straggler stars Default: 0.0

• fbhb (float, optional) – Fraction of horizontal branch stars that are blue Default: 0.0

• pagb (float, optional) – Weight given to the post–AGB phase Default: 1.0

• redshifts_key (str, optional) – galaxy redshift, dataset keyword name Default: redshifts

• Z_met_key (str, optional) – The metallicity is specified as an integer ranging between 1 and nz. If zcontinuous > 0 then this parameter is ignored, dataset keyword name Default: zmet

• stellar_metallicities_key (str, optional) – galaxy stellar metallicities (log10(Z / Zsun)) dataset keyword name, to be used with zcontinuous > 0,dataset keyword name Default: stellar_metallicity

• pmetals_key (str, optional) – The power for the metallicty distribution function,only used if zcontinous=2, dataset keyword name Default: pmetals

• imf_type (int, optional) – IMF type, see FSPS manual, default Chabrier IMF Default: 1

• imf_upper_limit (float, optional) – The upper limit of the IMF in solar masses Default: 120.0

• imf_lower_limit (float, optional) – The lower limit of the IMF in solar masses Default: 0.08

• imf1 (float, optional) – log slope of IMF in 0.08<M/Msun<0.5, if imf_type=2 Default: 1.3

• imf2 (float, optional) – log slope of IMF in 0.5<M/Msun<1, if imf_type=2 Default: 2.3

• imf3 (float, optional) – log slope of IMF in M/Msun>1, if imf_type=2 Default: 2.3

• vdmc (float, optional) – IMF parameter defined in van Dokkum (2008). Only used if imf_type=3 Default: 0.08

• mdave (float, optional) – IMF parameter defined in Dave (2008). Only used if imf_type=4. Default: 0.5

• evtype (int, optional) – Compute SSPs for only the given evolutionary type. All phases used when set to -1. Default: -1

• use_wr_spectra (int, optional) – Turn on/off the WR spectral library Default: 1

• logt_wmb_hot (float, optional) – Use the Eldridge (2017) WMBasic hot star library above this value of log(T_eff) or 25,000K,whichever is larger Default: 0.0

• masscut (float, optional) – Truncate the IMF above this value Default: 150.0

• velocity_dispersions_key (str, optional) – stellar velocity dispersions (km/s), dataset keyword name Default: stellar_velocity_dispersion

• min_wavelength (float, optional) – The minimum rest-frame wavelength. Default: 250

• max_wavelength (float, optional) – The maximum rest-frame wavelength Default: 12000

• gas_ionizations_key (str, optional) – gas ionization values dataset keyword name Default: gas_ionization

• gas_metallicities_key (str, optional) – gas metallicities (log10(Zgas / Zsun)) dataset keyword name Default: gas_metallicity

• igm_factor (float, optional) – Factor used to scale the IGM optical depth Default: 1.0

• sfh_type (int, optional) – star-formation history type, see FSPS manual, default SSP Default: 0

• tau_key (str, optional) – Defines e-folding time for the SFH, in Gyr. Only used if sfh=1 or sfh=4, dataset keyword name Default: tau

• const_key (str, optional) – Defines the constant component of the SFH, Only used if sfh=1 or sfh=4, dataset keyword name Default: const

• sf_start_key (str, optional) – Start time of the SFH, in Gyr. Only used if sfh=1 or sfh=4 or sfh=5, dataset keyword name Default: sf_start

• sf_trunc_key (str, optional) – Truncation time of the SFH, in Gyr. Only used if sfh=1 or sfh=4 or sfh=5, dataset keyword name Default: sf_trunc

• stellar_ages_key (str, optional) – galaxy stellar ages (Gyr),dataset keyword name Default: stellar_age

• fburst_key (str, optional) – Defines the fraction of mass formed in an instantaneous burst of star formation. Only used if sfh=1 or sfh=4,dataset keyword name Default: fburst

• tburst_key (str, optional) – Defines the age of the Universe when the burst occurs. If tburst > tage then there is no burst. Only used if sfh=1 or sfh=4, dataset keyword name Default: tburst

• sf_slope_key (str, optional) – For sfh=5, this is the slope of the SFR after time sf_trunc, dataset keyword name Default: sf_slope

• dust_type (int, optional) – attenuation curve for dust type, see FSPS manual, default Calzetti Default: 2

• dust_tesc (float, optional) – Stars younger than dust_tesc are attenuated by both dust1 and dust2, while stars older are attenuated by dust2 only. Units are log(yrs) Default: 7.0

• dust_birth_cloud_key (str, optional) – dust parameter describing young stellar light attenuation (dust1 in FSPS), dataset keyword name Default: dust1_birth_cloud

• dust_diffuse_key (str, optional) – dust parameters describing old stellar light attenuation (dust2 in FSPS) dataset keyword name Default: dust2_diffuse

• dust_clumps (int, optional) – Dust parameter describing the dispersion of a Gaussian PDF density distribution for the old dust. Setting this value to -99.0 sets the distribution to a uniform screen, values other than -99 are no longer supported Default: -99

• frac_nodust (float, optional) – Fraction of starlight that is not attenuated by the diffuse dust component Default: 0.0

• frac_obrun (float, optional) – Fraction of the young stars (age < dust_tesc) that are not attenuated by dust1 and that do not contribute to any nebular emission, representing runaway OB stars or escaping ionizing radiation. These stars are still attenuated by dust2. Default: 0.0

• dust_index_key (str, optional) – Power law index of the attenuation curve. Only used when dust_type=0, dataset keyword name Default: dust_index

• dust_powerlaw_modifier_key (str, optional) – power-law modifiers to the shape of the Calzetti et al. (2000) attenuation curve (dust1_index),dataset keyword name Default: dust_calzetti_modifier

• mwr_key (str, optional) – The ratio of total to selective absorption which characterizes the MW extinction curve: RV=AV/E(B-V), used when dust_type=1,dataset keyword name Default: mwr

• uvb_key (str, optional) – Parameter characterizing the strength of the 2175A extinction feature with respect to the standard Cardelli et al. determination for the MW. Only used when dust_type=1,dataset keyword name Default: uvb

• wgp1_key (str, optional) – Integer specifying the optical depth in the Witt & Gordon (2000) models. Values range from 1 − 18, used only whendust_type=3, dataset keyword name Default: wgp1

• wgp2 (int, optional) – Integer specifying the type of large-scale geometry and extinction curve. Values range from 1-6, used only when dust_type=3 Default: 1

• wgp3 (int, optional) – Integer specifying the local geometry for the Witt & Gordon (2000) dust models, used only when dust_type=3 Default: 1

• dust_emission_gamma_key (str, optional) – Relative contributions of dust heated at Umin, parameter of Draine and Li (2007) dust emission modeldataset keyword name Default: dust_gamma

• dust_emission_umin_key (str, optional) – Minimum radiation field strengths, parameter of Draine and Li (2007) dust emission model, dataset keyword name Default: dust_umin

• dust_emission_qpah_key (str, optional) – Grain size distributions in mass in PAHs, parameter of Draine and Li (2007) dust emission model,dataset keyword name Default: dust_qpah

• fraction_agn_bol_lum_key (str, optional) – Fractional contributions of AGN wrt stellar bolometric luminosity, dataset keyword name Default: f_agn

• agn_torus_opt_depth_key (str, optional) – Optical depths of the AGN dust torii dataset keyword name Default: tau_agn

• tabulated_sfh_key (str, optional) – tabulated SFH dataset keyword name Default: tabulated_sfh

• tabulated_lsf_key (str, optional) – tabulated LSF dataset keyword name Default: tabulated_lsf

• physical_units (bool, optional) – False (True) for rest-frame spectra in units ofLsun/Hz (erg/s/Hz) Default: False

• restframe_wave_key (str, optional) – Rest-frame wavelength keyword name of the output hdf5 dataset Default: restframe_wavelengths

• restframe_sed_key (str, optional) – Rest-frame SED keyword name of the output hdf5 dataset Default: restframe_seds

Returns:

ModelHandle storing the rest-frame SED models

Return type:

dict