HfS, Hyperfine Structure Fitting Tool

Abstract

HfS is a tool to fit the hyperfine structure of spectral lines, with multiple velocity components. The HfS_nh3 procedures included in HfS fit simultaneously the hyperfine structure of the NH${}_3$ (J,K)= (1,1) and (2,2) transitions, and perform a standard analysis to derive $T_{\mathrm{ex}}$, NH${}_3$ column density, $T_{\mathrm{rot}}$, and $T_{\mathrm{k}}$. HfS uses a Monte Carlo approach for fitting the line parameters. Especial attention is paid to the derivation of the parameter uncertainties. HfS includes procedures that make use of parallel computing for fitting spectra from a data cube.

19 pages, accepted by PASP

Cited by in corpus (21)

• The Green Bank Ammonia Survey (GAS): First Results of NH3 mapping the Gould Belt
• A survey of C2H, HCN, and C18O in protoplanetary disks
• Magnetically regulated collapse in the B335 protostar? II. Observational constraints on gas ionization and magnetic field coupling
• The Physical Properties of the SVS 13 Protobinary System: Two Circumstellar Disks and a Spiraling Circumbinary Disk in the Making
• The chemical structure of young high-mass star-forming clumps: (II) parsec-scale CO depletion and deuterium fraction of $\mathrm{HC}{\mathrm{O}}^{+}$
• The evolution of temperature and density structures of OB cluster-forming molecular clumps
• An observational correlation between magnetic field, angular momentum and fragmentation in the envelopes of Class 0 protostars?
• The circumestellar disk of the B0 protostar powering the HH 80-81 radio jet
• Unveiling a cluster of protostellar disks around the massive protostar GGD27 MM1
• The chemical structure of young high-mass star-forming clumps: (I) Deuteration
• An ALMA Survey of Chemistry in Disks around M4-M5 Stars
• Fingerprinting the effects of hyperfine structure on CH and OH far infrared spectra using Wiener filter deconvolution
• Analysis and test of the central-blue-spot infall hallmark
• VLA ammonia observations of L1287: analysis of the "Guitar" core and two filaments
• NH${}_3$ (1,1) hyperfine intensity anomalies in the Orion A molecular cloud
• A detailed temperature map of the archetypal protostellar shocks in L1157
• Hyperfine Group Ratio: A Recipe for Deriving Kinetic Temperature from Ammonia Inversion Lines
• Sub-stellar companions of the young weak-line TTauri Star DoAr21
• Erosion of a dense molecular core by a strong outflow from a massive protostar
• FIRESTORM I: Stellar Feedback and Gas Kinematics in the Evolved W40 Hub-Filament System
• Structured velocity field in the inner envelope of B335: ALMA observations of rare CO isotopologues