The 23.01 release of Cloudy

2023/11/16 by Chamani M. Gunasekera, P. A. M. van Hoof, Gunasekera, Chamani M. +5 · 12 citations
Engineering · Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Astrophysics of Galaxies (astro-ph.GA) #FOS: Physical sciences #Instrumentation and Methods for Astrophysics (astro-ph.IM) #Ionosphere and magnetosphere dynamics #Laser-induced spectroscopy and plasma

paper · pdf · doi:10.48550/arxiv.2311.10163

openalex publication_date 2023/11/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We announce the C23.01 update of Cloudy. This corrects a simple coding error, present since ∼ 1990, in one routine that required a conversion from the line-center to the mean normalization of the Lyα optical depth. This affects the destruction of H I Lyα by background opacities. Its largest effect is upon the Lyα intensity in high-ionization dusty clouds, where the predicted intensity is now up to three times stronger. Other properties that depend on Lyα destruction, such as grain infrared emission, change in response.

Cited by

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• MIRI spectrophotometry of GN-z11: Detection and nature of an optical red continuum component
• A comparison of time-dependent Cloudy astrophysical code simulations with experimental X-ray spectra from keV laser-generated argon plasmas
• PyEMILI: A New Generation Computer-aided Spectral Line Identifier -- II. Emission-line Identification and Plasma Diagnostics of a Sample of Gaseous Nebulae
• A Fleeting GLIMPSE of N/O Enrichment at Cosmic Dawn: Evidence for Wolf Rayet N Stars in a z = 6.1 Galaxy
• The Library of Exoplanet Atmospheric Composition Measurements: Population Level Trends in Exoplanet Composition with ExoComp
• Probing AGN-ISM Feedback through Extended X-ray Emission in ESO 137-G034
• Kinematic analysis of an Ultra-Strong MgII absorber at z~1.13 linking to Circumgalactic Gas Structures
• The AURORA Survey: Robust Helium Abundances at High Redshift Reveal A Subpopulation of Helium-Enhanced Galaxies in the Early Universe
• The 2025 Release of Cloudy
• Optical Strong Line Ratios Cannot Distinguish Between Stellar Populations and Accreting Black Holes at High Ionization Parameters and Low Metallicities

Related

• Current Development of the Photo-Ionization Code Cloudy
• The 2025 Release of Cloudy
• The 2023 release of Cloudy
• The 2013 Release of Cloudy
• Cloudy in the microcalorimeter era: improved energies for Kα transitions