The 3D non-LTE solar nitrogen abundance from atomic lines
Sign Up to like & getrecommendations! Published in 2020 at "Astronomy and Astrophysics"
DOI: 10.1051/0004-6361/202037890
Abstract: Nitrogen is an important element in various fields of stellar and Galactic astronomy, and the solar nitrogen abundance is crucial as a yardstick for comparing different objects in the cosmos. In order to obtain a… read more here.
Keywords: nitrogen; astronomy; non lte; nitrogen abundance ... See more keywords
Non-LTE inversions of a confined X2.2 flare
Sign Up to like & getrecommendations! Published in 2020 at "Astronomy and Astrophysics"
DOI: 10.1051/0004-6361/202038900
Abstract: Obtaining the magnetic field vector accurately in the solar atmosphere is essential for studying changes in field topology during flares and to reliably model space weather. We tackle this problem by applying various inversion methods… read more here.
Keywords: non lte; field; confined flare; lte inversions ... See more keywords
Quantitative spectroscopy of extreme helium stars Model atmospheres and a non-LTE abundance analysis of BD+10°2179
Sign Up to like & getrecommendations! Published in 2017 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stx1541
Abstract: Extreme helium stars (EHe stars) are hydrogen-deficient supergiants of spectral type A and B. They are believed to result from mergers in double degenerate systems. In this paper, we present a detailed quantitative non-LTE spectral… read more here.
Keywords: non lte; analysis 2179; spectroscopy; extreme helium ... See more keywords
On the methanol emission detection in the TW Hya disc: the role of grain surface chemistry and non-LTE excitation
Sign Up to like & getrecommendations! Published in 2017 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stx624
Abstract: The recent detection of gas-phase methanol (CH$_3$OH) lines in the disc of TW Hya by Walsh et al. provided the first observational constraints on the complex O-bearing organic content in protoplanetary discs. The emission has… read more here.
Keywords: detection; non lte; methanol; chemistry ... See more keywords
Non-LTE line formation of Fe in late-type stars – IV. Modelling of the solar centre-to-limb variation in 3D
Sign Up to like & getrecommendations! Published in 2017 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stx673
Abstract: Our ability to model the shapes and strengths of iron lines in the solar spectrum is a critical test of the accuracy of the solar iron abundance, which sets the absolute zero-point of all stellar… read more here.
Keywords: non lte; line formation; lte line; formation late ... See more keywords
The GALAH survey: verifying abundance trends in the open cluster M67 using non-LTE modelling
Sign Up to like & getrecommendations! Published in 2018 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/sty2414
Abstract: Open cluster members are coeval and share the same initial bulk chemical composition. Consequently, differences in surface abundances between members of a cluster that are at different evolutionary stages can be used to study the… read more here.
Keywords: non lte; abundance; open cluster; cluster m67 ... See more keywords
Inelastic Processes in Strontium-Hydrogen Collisions and Their Impact on Non-LTE Calculations
Sign Up to like & getrecommendations! Published in 2022 at "Atoms"
DOI: 10.3390/atoms10010033
Abstract: Inelastic processes rate coefficients for low-energy Sr + H, Sr+ + H−, Sr+ + H, and Sr2+ + H− collisions are calculated using the multichannel quantum model approach. A total of 31 scattering channels of… read more here.
Keywords: inelastic processes; processes strontium; non lte; lte calculations ... See more keywords
MIPAS Observations of Ozone in the Middle Atmosphere
Sign Up to like & getrecommendations! Published in 2018 at "Atmospheric Measurement Techniques"
DOI: 10.5194/amt-11-2187-2018
Abstract: Abstract. In this paper we describe the stratospheric and mesospheric ozone (version V5r_O3_m22) distributions retrieved from MIPAS observations in the three middle atmosphere modes (MA, NLC, and UA) taken with an unapodized spectral resolution of… read more here.
Keywords: mipas observations; middle atmosphere; observations ozone; non lte ... See more keywords