Dragonfly44_SFH

This repository contains all the data used to analyze the star formation history (SFH) of Dragonfly 44 (DF44) as discussed in Webb+2022 (https://ui.adsabs.harvard.edu/abs/2022MNRAS.516.3318W/abstract) based on high-S/N and high-resolution rest-frame optical KCWI spectroscopy and NUV--NIR photometry.

Analysis presented in Webb+2022

The scripts used to generate the figures in Webb+2022 are provided in

analysis/Webb2022_figures/*

Note that some figures have slight errors, as noted in

analysis/Webb2022_figures/errata.txt

These errors have been corrected in the notebooks shared here.

Additional analysis for Dragonfly 44

as shown in various notebooks in

analysis/

Additional fits with different SFH models/priors:

• nonparametic model with constant SFR "continuity" prior
• nonparametic model with Dirichlet prior with other $\alpha_\mathrm{D}$ values
• delayed declining exponential SFR model

Requirements:

• numpy (v1.25.1)
• matplotlib (v3.7.2)
• scipy (v1.11.1)
• astropy (v5.3.1)
• pandas (v2.0.3)
• seaborn (v0.12.2)
• corner (v2.2.2)
• ipython, Jupyter notebook (v4.0.3)
• Prospector (v1.2.0):
  • and dependent packages for Prospector
  • h5py (v3.9.0)
  • dynesty (v2.1.2)

Setup details:

• In order to construct the filter objects used by Prospector, via sedpy, copy filter files for Dragonfly44 from

  data/Dragonfly44/sedpy_filters/

  to the appropriate sedpy folder

  sedpy/data/filters/

Acknowledgments