Exploring mutual information between IRIS spectral lines. I. Correlations between spectral lines during solar flares and within the quiet Sun [PDF]
, 2021 Spectral lines allow us to probe the thermodynamics of the solar atmosphere, but the shape of a single spectral line may be similar for different thermodynamic solutions. Multiline analyses are therefore crucial, but computationally cumbersome. We investigate correlations between several chromospheric and transition region lines to restrain the ...
arxiv +1 more source
A new model for the structure of the DACs and SACs regions in the Oe and Be stellar atmospheres [PDF]
, 2007 In this paper we present a new mathematical model for the density regions where a specific spectral line and its SACs/DACs are created in the Oe and Be stellar atmospheres.
Antoniou, A. +6 more
core +1 more source
Spectral Line Shapes of He I Line 3889 Å
Atoms, 2014 Spectral line shapes of neutral helium 3889 Å(23S–33P) transition line are calculated by using several theoretical methods. The electronic contribution to the line broadening is calculated from quantum statistical many-particle theory by using ...
Banaz Omar +8 more
doaj +1 more source
Spectral Line Shapes in Plasmas II
Atoms, 2019 The Spectral Line Shapes in Plasmas (SLSP) code comparison workshop series [...]
Evgeny Stambulchik +3 more
doaj +1 more source
the SDSS-III APOGEE Spectral Line List for H-Band Spectroscopy [PDF]
, 2015 We present the H-band spectral line lists adopted by the Apache Point Observatory Galactic Evolution Experiment (APOGEE). The APOGEE line lists comprise astrophysical, theoretical, and laboratory sources from the literature, as well as newly evaluated ...
Bizyaev, D. +17 more
core +2 more sources
Spectral Line Imaging Observations of 1E0102.2-7219 [PDF]
, 2001 E0102-72 is the second brightest X-ray source in the Small Magellanic Cloud and the brightest supernova remnant in the SMC. We observed this SNR for ~140 ksec with the High Energy Transmission Gratings (HETG) aboard the Chandra X-ray Observatory.
Allen, G. E. +7 more
core +3 more sources
Sensors, 2021 This paper presents a multi-spectral photometric stereo (MPS) method based on image in-painting, which can reconstruct the shape using a multi-spectral image with a laser line.
Liang Lu +4 more
doaj +1 more source
A representative sample of Be stars III: H band spectroscopy [PDF]
, 1999 We present H band (1.53 - 1.69 micron) spectra of 57 isolated Be stars of spectral types O9-B9 and luminosity classes III,IV & V. The HI Brackett (n-4) series is seen in emission from Br 11-18, and FeII emission is also apparent for a subset of those ...
Clark +19 more
core +5 more sources
A case study of HF radar spectra and 630.0 nm auroral emission in the pre-midnight sector [PDF]
Annales Geophysicae, 2001 A comparison of HF radar backscatter observed by the CUTLASS Finland radar, meridian scanning photometer data from Longyearbyen, magnetic field variations from IMAGE stations, and particle precipitation measured by the DMSP F12 spacecraft is presented.
M. Lester +4 more
doaj +1 more source
A Clumpy Stellar Wind and Luminosity-Dependent Cyclotron Line Revealed by The First Suzaku Observation of the High-Mass X-ray Binary 4U 1538-522 [PDF]
, 2014 We present results from the first Suzaku observation of the high-mass X-ray binary 4U 1538-522. The broad-band spectral coverage of Suzaku allows for a detailed spectral analysis, characterizing the cyclotron resonance scattering feature at $23.0 \pm 0.4$
Fuerst, Felix +5 more
core +3 more sources