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@bd-j bd-j released this 03 Aug 14:25
· 4 commits to master since this release
v4.0
05b5e55

This is FSPS v4.0.

Changes from v3.3 (which had no formal release)

  • Updated the MIST isochrones to MIST v2.5 (Z_sun=0.0185 vs the old AGSS09 0.0134) and including alpha-enhanced versions. See Dotter et al. 2025 and Park et al. 2025 for details.
  • Added C3K spectra, using C3K v2.3 with microturbulence=1, and including alpha-enhanced versions for the low resolution spectra. Also uses the MIST2 definition of solar metallicity, Z_sun=0.0185 (Dotter et al 25, Dotter et al 08). The low resolution C3K models are now the default.
  • Different C3K libraries (e.g. for different resolution) are located in different subdirectories along with their metadata.
  • Earlier version of C3K solar scaled models (C3K/v1.3, R~3000) introduced since v3.2 was removed.
  • Significant updates to enable alpha-anhanced models when C3K_LR and MIST are combined via the AFE_FLAG pre-compiler directive, and to use a per-library logg-logt grid for the spectra.
  • Fixed a bug in the attenuation of AGN torus emission by diffuse dust. (d9a387a)
  • Switch to using the regular stellar grid for O-rich TPAGB stars by default.
  • Turn off use of the WMBasic hot star library by default.
  • Resolution arrays used to set nebular line widths.

Changes from v3.2 (since no formal v3.3 release)

  • A new C3K library (C3K v1.3) solar scaled library. These were located at SPECTRA/C3K/c3k_afe+0.0*, and subsequently removed in favor of C3K_LR and C3K_HR libraries in v4.0
  • Add spectral resolution arrays for the stellar libraries.
  • Added optional ULX population spectra, courtesy of Kristin Garofali.
  • Updated nebular line list to include some weaker lines. These new lines only have non-zero entries in the BPASS nebular tables, provided by Kristin Garofali
  • Note that some intermediate updates since v3.2 introduced a bug in the nebular grids; this was resolved in commit 5b87175, see #84
  • Added additional Roman, Rubin, and Euclid filters, courtesy of Chris Usher, and updated JWST curves.
  • Added the Reddy (2015) attenuation curve and Gordon (2003) SMC bar extinction curve.
  • Added a dust3 parameter for dust that only attenuates old stars.
  • Add a common SSP weights array, and store the young and old population spectra from COMPSP in common variables.
  • Fixed a bug in the stellar remnant calculation for low IMF upper limits.
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