A case study of hurdle and generalized additive models in astronomy: the escape of ionizing radiation

• DOI: 10.1093/mnras/sty3314
• Publication Date: 2018-12-04T15:12:00Z
• Authors: M W Hattab; R S de Souza; B Ciardi; J-P Paardekooper; S Khochfar; C Dalla Vecchia
• Keywords: FOS: Computer and information sciences; Cosmology and Nongalactic Astrophysics (astro-ph.CO); FOS: Physical sciences; Statistics - Applications; 01 natural sciences; 0103 physical sciences; astro-ph.CO; Applications (stat.AP); Astrophysics - Instrumentation and Methods for Astrophysics; stat.AP; Instrumentation and Methods for Astrophysics (astro-ph.IM); astro-ph.IM; Astrophysics - Cosmology and Nongalactic Astrophysics

The dark ages of the Universe end with formation first generation stars residing in primeval galaxies. These objects were to produce ultraviolet ionizing photons a period when cosmic gas changed from neutral state an ionized one, known as Epoch Reionization (EoR). A pivotal aspect comprehend EoR is probe intertwined relationship between fraction capable escape haloes, also ($f_{esc}$), and physical properties galaxy. This work develops sound statistical model suitable account for such non-linear relationships non-Gaussian nature $f_{esc}$. simultaneously estimates probability that given primordial galaxy starts photon production mean level $f_{esc}$ once it triggered. was employed First Billion Years simulation suite, which we show baryonic rate appear have larger impact on than previously thought. naive univariate analysis same problem would suggest smaller effects these much specific star rate, lessened after accounting other non-linearities model.