bib BPASS-in-Browser

SSP Explorer

Follow the evolution of integrated stellar populations.

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Spectral energy distribution

Frames between grid ages are interpolated for display — photometry always uses true grid ages.
CSV JSON

Photometry

(absolute AB · DL = 10 pc)
plotFilterGroupλeff (Å)MABCorrection applied

Magnitudes are for the current (live) SSP only — pinned overlays are not photometered. They use that SSP’s full-resolution SED at the nearest grid age (—), not the interpolated display curve. Tick a filter to overlay its passband and the measured magnitude as a point on the SED. Correction applied lists what acts on each magnitude: Dust, IGM, or None. Amber pills — No dust (outside window), Dust (partial), IGM ignored — mean a requested correction could not be (fully) applied inside that passband; the magnitude is always the plotted SED integrated through the filter.

Star counts

Expected number of each type at this age, IMF-weighted, scaled to formed mass.

Ionizing photons

Rest-frame ionizing photon rate. The right axis is the Case B Hα luminosity BPASS tabulates as log L(Hα) = log Nion − 11.87. Independent of the redshift slider.

Supernova rates

Counts in each age bin divided by the bin width. Core-collapse = IIP + II-other + Ib + Ic.