A $Li$ne $Me$asuring library for large and complex spectroscopic data sets: Implementation of a virtual observatory for JWST spectra

Abstract

The upcoming generation of telescopes, instruments, and surveys is poised to usher in an unprecedented "Big Data" era in the field of astronomy. Within this context, even seemingly modest tasks such as spectral line analyses could become increasingly challenging for astronomers. In this paper, we announce the release of $\mathrm{L}\mathrm{I}\mathrm{M}\mathrm{E}$. This package is tailored for multidisciplinary observations with long-slit and integral field spectroscopy (IFS) support. $\mathrm{L}\mathrm{I}\mathrm{M}\mathrm{E}$ functions encompass the reading of observational files, detecting lines, conditioned line fitting, and the plotting and storage of results. Most importantly, these measurements are structured to support the subsequent chemical and kinematic analyses. To reduce the coding effort required from users, we introduced a notation system for atomic transitions that is accessible to humans and machine-readable. Along with this system, we present an extensive database of line bands, spanning from the ultraviolet to the infrared wavelength range. Additionally, we propose a model designed to train machine learning algorithms in line detection. $\mathrm{L}\mathrm{I}\mathrm{M}\mathrm{E}$ features a comprehensive online documentation, which details the command attributes and includes several tutorials. These tutorials range from measuring a single line to analyzing an entire IFS data cube. This library functions and measurements are showcased in an online virtual observatory. The data in this interactive website come from the JWST NIRSpec observations of the CEERs survey. In this regard, $\mathrm{L}\mathrm{I}\mathrm{M}\mathrm{E}$ offers improvements related to the dissemination and accessibility of astronomical spectra.

Accepted for publication in A&A

References in corpus (17)

• Array Programming with NumPy
• The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
• Improving the full spectrum fitting method: accurate convolution with Gauss-Hermite functions
• The Near-Infrared Spectrograph (NIRSpec) on the James Webb Space Telescope I. Overview of the instrument and its capabilities
• PyNeb: a new tool for analyzing emission lines. I. Code description and validation of results
• CEERS Key Paper I: An Early Look into the First 500 Myr of Galaxy Formation with JWST
• A Long Time Ago in a Galaxy Far, Far Away: A Candidate z ~ 12 Galaxy in Early JWST CEERS Imaging
• Deriving model-based T${}_e$-consistent chemical abundances in ionised gaseous nebulae
• Confirmation and refutation of very luminous galaxies in the early universe
• Spectroscopic Confirmation of CEERS NIRCam-selected Galaxies at $\mathbf{z}\simeq 8-10$
• LZIFU: an emission-line fitting toolkit for integral field spectroscopy data
• A Bayesian direct method implementation to fit emission line spectra: Application to the primordial He abundance determination
• Ubiquitous broad-line emission and the relation between ionized gas outflows and Lyman continuum escape in Green Pea galaxies
• New insights on the nebular emission, ionizing radiation and low metallicity of Green Peas from advanced modelling
• Spatially-resolved chemodynamics of the starburst dwarf galaxy CGCG 007-025: Evidence for recent accretion of metal-poor gas
• The resolved chemical composition of the starburst dwarf galaxy CGCG007-025: Direct method versus photoionization model fitting
• GLEAM: Galaxy Line Emission & Absorption Modeling

Cited by in corpus (18)

• Physical properties of extreme emission-line galaxies at $z\sim 4-9$ from the JWST CEERS survey
• Early Results from GLASS-JWST. XXV. Electron Density in the Interstellar Medium at $0.7\lesssim z\lesssim 9.3$ with NIRSpec High-resolution Spectroscopy
• The GLASS-JWST Early Release Science Program. IV. Data release of 263 spectra from 245 unique sources
• Little impact of mergers and galaxy morphology on the production and escape of ionizing photons in the early Universe
• The ionizing photon production efficiency of star-forming galaxies at $z\sim 4-10$
• Physical properties of strong 1 < z < 3 Balmer and Paschen lines emitters observed with JWST
• CEERS: Forging the First Dust Grains in the Universe? A Population of Galaxies with spectroscopically-derived Extremely Low Dust Attenuation (GELDA) at 4.0<z<11.4
• New Methods of Identifying AGN in the Early Universe using Spectroscopy and Photometry in the JWST Era
• Eruptive mass loss less than a year before the explosion of superluminous supernovae: I. The cases of SN 2020xga and SN 2022xgc
• MAMMOTH-MOSFIRE: Environmental Effects on Galaxy Interstellar Medium at $z\sim 2$
• Testing Photometric Techniques for Measuring the Rest-Frame UV Spectral Slope Against JWST PRISM Spectroscopy
• Not just PAH${}_{3.3}$: why galaxies turn red in the Near-Infrared
• J-PAS: First Identification, Physical Properties and Ionization Efficiency of Extreme Emission Line Galaxies
• Discovery of new N-emitters over a wide redshift range
• Tracing ionized gas kinematics in Lyman-Break Analogs. Implications for star formation compactness and outflow properties
• Extreme equivalent width-selected low-mass starbursts at $z=4-9$: insights into their role in cosmic reionization
• Nitrogen abundances in star-forming galaxies 2.2 Gyr after the Big Bang are not elevated
• ELFO: A Python Package for Emission Line Fitting Optimization in Integral Field Spectroscopy Data