Results 1 to 10 of about 5,361,465 (264)

The APOGEE Data Release 16 Spectral Line List [PDF]

open access: yesAstronomical Journal, 2021
Abstract The updated H-band spectral-line list (from λ15000–17000) adopted by the Apache Point Observatory Galactic Evolution Experiment (APOGEE) for the SDSS-IV Data Release 16 (DR16) is presented in this work. The APOGEE line list is a combination of atomic and molecular lines, with data drawn from laboratory, theoretical, and ...
Sten Hasselquist   +2 more
exaly   +4 more sources

A new list of thorium and argon spectral lines in the visible *,** [PDF]

open access: yesAstronomy and Astrophysics, 2007
7 pages, 6 figures, accepted for publication in A& ...
Francesco Pepe
exaly   +3 more sources

The Optical Spectral Line List of RR Telescopii

open access: yesAstrophysical 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   +6 more
exaly   +2 more sources

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

open access: yesAstrophysical 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
exaly   +2 more sources

An Improved Ultraviolet Spectral Line List for the Symbiotic Star RR Telescopii

open access: yesAstrophysical 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 ...
W A Feibelman
exaly   +2 more sources

Spectral line list of potential cosmochronological interest deduced from new calculations of radiative transition rates in singly ionized thorium (Th ii)

open access: yesMonthly Notices of the Royal Astronomical Society, 2020
ABSTRACTIn this work, we report a list of 91 strong Th ii spectral lines in the visible wavelength region that could be used as cosmochronometers in future investigations to determine stellar ages from thorium radioactive decay. This list was established on the basis of a pseudo-relativistic Hartree–Fock model including core-polarization corrections ...
Pascal Quinet, Patrick Palmeri
exaly   +3 more sources

XUV spectra of the 1973 June 15 solar flare observed from Skylab. III - A list of spectral lines from 1000 to 1940 A

open access: yesAstrophysical Journal, Supplement Series, 1978
A wavelength list of spectral lines between 1000 and 1940 A is presented for the solar flare that occurred on June 15, 1973. The spectra were recorded by the NRL spectrograph on Skylab. The spectral resolution is 0.06 A. Intensities, identifications, and estimates of line widths are given.
G A Doschek
exaly   +2 more sources

M-type Star Spectral Analysis: ScO Line List Including the B2Σ+–X2Σ+ Band System

open access: yesThe Astrophysical Journal
An analysis of the B ^2 Σ ^+  − X ^2 Σ ^+ band system of ^45 Sc ^16 O is presented. ScO was excited in a hollow cathode discharge, and its Doppler-limited resolution spectrum was measured with a Fourier transform spectrometer. The spectroscopic constants
Léo Lavy   +2 more
doaj   +2 more sources

S-type Stars: Line List for the A2Π–X2Σ+ Band System of LaO

open access: yesThe Astrophysical Journal, 2023
LaO bands are found in the spectra of cool S-type stars. The bands of the A ^2 Π–X ^2 Σ ^+ transition with $v^{\prime} \leqslant 3$ and v ″ ≤ 4 are rotationally analyzed, providing spectroscopic constants for the A ^2 Π state.
P. F. Bernath   +2 more
doaj   +1 more source

Wavelengths and Energy Levels of the Upper Levels of Singly Ionized Nickel (Ni ii) from 3d 8(3 F)5f to 3d 8(3 F)9s

open access: yesThe Astrophysical Journal Supplement Series, 2023
Using high-resolution spectra of Ni ii recorded using Fourier transform (FT) spectroscopy of continuous, nickel–helium hollow cathode discharge sources in the region 143–5555 nm (1800–70,000 cm ^−1 , the analysis of 1016 Ni ii lines confirmed and ...
Christian P. Clear   +4 more
doaj   +1 more source

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