1. Modeling the Extragalactic Background Light and the Cosmic Star Formation History.
- Author
-
Finke, Justin D., Ajello, Marco, Domínguez Díaz, Alberto, Desai, Abhishek, Hartmann, Dieter H., Paliya, Valdehi S., Saldaña López, Alberto, Finke, Justin D., Ajello, Marco, Domínguez Díaz, Alberto, Desai, Abhishek, Hartmann, Dieter H., Paliya, Valdehi S., and Saldaña López, Alberto
- Abstract
We are grateful to the referee for a constructive report that has improved this paper. J.D.F. was supported by NASA through contract S-15633Y and through the Fermi GI program. A.D. is grateful for the support of the Ramón y Cajal program from the Spanish MINECO. A.S.L. acknowledges support from Swiss National Science Foundation. M.A. acknowledges support from Fermi GI Grant 80NSSC22K1579., We present an updated model for the extragalactic background light (EBL) from stars and dust, over wavelengths approximate to 0.1-1000 mu m. This model uses accurate theoretical stellar spectra, and tracks the evolution of star formation, stellar mass density, metallicity, and interstellar dust extinction and emission in the universe with redshift. Dust emission components are treated self-consistently, with stellar light absorbed by dust reradiated in the infrared as three blackbody components. We fit our model, with free parameters associated with star formation rate and dust extinction and emission, to a wide variety of data: luminosity density, stellar mass density, and dust extinction data from galaxy surveys; and gamma-ray absorption optical depth data from gamma-ray telescopes. Our results strongly constraint the star formation rate density and dust photon escape fraction of the universe out to redshift z = 10, about 90% of the history of the universe. We find our model result is, in some cases, below lower limits on the z = 0 EBL intensity, and below some low-z gamma-ray absorption measurements., NASA, Fermi GI program, Ministerio de Economía y Competitividad (MINECO), Swiss National Science Foundation, Fermi GI, Depto. de Estructura de la Materia, Física Térmica y Electrónica, Fac. de Ciencias Físicas, TRUE, pub
- Published
- 2022