Results 11 to 20 of about 21,073 (269)

Spectral line lists of a nitrogen gas discharge for wavelength calibration in the range 4500–11 000 cm^-1 [PDF]

Astronomy & Astrophysics, 2015
A discharge of nitrogen gas, as created in a microwave-induced plasma, exhibits a very dense molecular emission line spectrum. Emission spectra of this kind could serve as wavelength calibrators for high-resolution astrophysical spectrographs in the near-infrared, where only very few calibration sources are currently available.
A. Boesch, A. Reiners
openaire   +4 more sources

iSLAT: the Interactive Spectral-line Analysis Tool for JWST and Beyond

The Astronomical Journal
We present the Interactive Spectral-Line Analysis Tool (iSLAT), a python-based graphical tool that allows users to interactively explore, inspect, and fit line emission observed in molecular spectra. iSLAT adopts a simple slab model in LTE that simulates
Evan G. Jellison, Andrea Banzatti, Matthew B. Johnson, Simon Bruderer   +3 more
doaj   +3 more sources

An upper limit for water dimer absorption in the 750 nm spectral region and a revised water line list [PDF]

Atmospheric Chemistry and Physics, 2010
Abstract. Absorption of solar radiation by water dimer molecules in the Earth's atmosphere has the potential to act as a positive feedback effect for climate change. There seems little doubt from the results of previous laboratory and theoretical studies that significant concentrations of the water dimer should be present in the atmosphere, yet ...
Shillings, A.J.L., Ball, S.M., Barber, M.J., Tennyson, J., Jones, R.L.   +4 more
openaire   +4 more sources

The Optical Spectral Line List of RR Telescopii

The Astrophysical Journal Supplement Series, 1997
The symbiotic nova RR Telescopii has been observed with the 1.5 m telescope of the Cerro Tololo Inter-American Observatory (CTIO), using the 1.5 m bench-mounted echelle spectrograph in conjunction with a Tektronix CCD. It displays a rich emission-line spectrum, ranging in excitation from O I to [Ni VIII].
F. C. McKenna, F. P. Keenan, N. C. Hambly, C. Allende Prieto, W. R. J. Rolleston, L. H. Aller, W. A. Feibelman   +6 more
openaire   +1 more source

Retrieval of atmospheric CO₂ vertical profiles from ground-based near-infrared spectra [PDF]

Atmospheric Measurement Techniques, 2021
We evaluate vertical profile retrievals of CO2 from 0.02 cm−1 resolution ground-based near-infrared solar absorption spectra with the GFIT2 algorithm, using improved spectroscopic line lists and line shapes.
S. Roche, K. Strong, D. Wunch, J. Mendonca, C. Sweeney, B. Baier, B. Baier, S. C. Biraud, J. L. Laughner, G. C. Toon, B. J. Connor   +10 more
doaj   +1 more source

An Updated Line List for NUV Spectral Synthesis in Evolved Stars: Redetermination of the Beryllium Abundance in the Solar Photosphere [PDF]

The Astrophysical Journal, 2018
Abstract Motivated by the desire to measure beryllium abundances in red giant stars, we have constructed a new line list for synthesizing spectra in the near-ultraviolet. Using the Sun, Arcturus, and Pollux as benchmark stars, we explore potential sources of missing continuous opacity and line absorption.
Joleen K. Carlberg, Katia Cunha, Verne V. Smith, José-Dias do Nascimento   +3 more
openaire   +1 more source

An improved ultraviolet spectral line list for the symbiotic star RR Telescopii

The Astrophysical Journal Supplement Series, 1993
We have remeasured wavelengths and intensities of International Ultraviolet Explorer (IUE) spectra of the symbiotic star, RR Tel. The main work is centered on the long 820 minute exposure high-resolution spectrum obtained on 1983 June 18. The list is intended to serve as a source of improved intensities and wavelengths for the ultraviolet spectrum of ...
G. A. Doschek, W. A. Feibelman
openaire   +1 more source

Theoretical hot methane line lists up to T=2000 K for astrophysical applications

, 2020
The paper describes the construction of complete sets of hot methane lines based on accurate ab initio potential and dipole moment surfaces and extensive first-principle calculations.
Rey, Michaël, Nikitin, Andrei V., Tyuterev, Vladimir G.   +2 more
core   +2 more sources

ANALYSIS OF THE SPECTRAL ENERGY DISTRIBUTION OFTHE COOLEST RCrB TYPE CARBON STAR DY Per

Odessa Astronomical Publications, 2008
We analysed the spectral energy distribution of the evolved carbon star DY Per by spectral synthesis technique. The red giant shows the photometric features of R CrB type stars.
L. A. Yakovina, A. V. Shavrina, Ya. V. Pavlenko, A. F. Pugach   +3 more
doaj   +1 more source

A solar spectral line list between 10 and 200 A modified for application to high spectral resolution X-ray astronomy

The Astrophysical Journal Supplement Series, 1984
A spectral line list for the 10-200 A range is developed from existing solar spectra for application to high spectral resolution measurements of astrophysical plasmas. The solar spectral line lists are merged into a single comprehensive list. The effect of the solar emission measure distribution is removed from the line intensities, which results in a ...
G. A. Doschek, R. D. Cowan
openaire   +1 more source