AtomNeb: IDL Library for Atomic Data of Ionized Nebulae
نویسندگان
چکیده
منابع مشابه
Emission in Ionized Nebulae
This paper presents an analysis of [Fe IV] emission based on new identifications and previous measurements of [Fe IV] lines in 30 Doradus, IC 4846, M42, SMC N88A, and SBS 0335−052. The Fe abundances obtained by adding the abundances of the relevant Fe ions (mainly Fe ++ and Fe 3+) are found to be lower, by factors in the range 2.6–5.9, than the Fe abundances implied by [Fe III] emission and an ...
متن کاملIdl Signal Processing Library 1.0
This document serves as an introduction to the small set of routines which extend IDL's signal processing capabilities that we are making available. The primary focus of these routines are David Thomson's multitaper methods which are described in detail in 1]. Here we will simply provide an introduction to the routines that come with this package with pointers on how to set them up on local les...
متن کاملAbsorption - Line Spectroscopy of Planetary Nebulae with FUSE : Probing the Molecular , Atomic , and Ionized Gas
The central stars of planetary nebulae (PNe) are natural targets for FUSE due to their UV brightness. The FUSE spectra of many PNe show absorption features due to circumstellar material in species ranging from H 2 and neutrals in the photodissociation region (PDR) to ions resident in the H II region. We report results from a program designed to search for nebular components in the H 2 Lyman and...
متن کاملThe Electron Temperature in Ionized Nebulae
We discuss the role of the electron temperature in abundance determinations in ionized nebulae (planetary nebulae and giant H II regions). We show that, even when observations provide a direct estimate of T e, abundance determinations may sometimes be significantly in error for reasons other than hypothetical temperature fluctuations or uncertainties in ionization correction factors, and we sho...
متن کاملA Reexamination of Electron Density Diagnostics for Ionized Gaseous Nebulae
We present a comparison of electron densities derived from optical forbidden line diagnostic ratios for a sample of over a hundred nebulae. We consider four density indicators, the [O ii] λ3729/λ3726, [S ii] λ6716/λ6731, [Cl iii] λ5517/λ5537 and [Ar iv] λ4711/λ4740 doublet ratios. Except for a few H ii regions for which data from the literature were used, diagnostic line ratios were derived fro...
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ژورنال
عنوان ژورنال: Journal of Open Source Software
سال: 2019
ISSN: 2475-9066
DOI: 10.21105/joss.00898