Zobrazeno 1 - 10
of 74
pro vyhledávání: '"Pereira, Tiago M D"'
Autor:
Moe, Thore E., Pereira, Tiago M. D., van der Voort, Luc Rouppe, Carlsson, Mats, Hansteen, Viggo, Calvo, Flavio, Leenaarts, Jorrit
We aim to compare and contrast the typical shapes of synthetic Ca II 854.2 nm spectra found in Bifrost simulations having different magnetic activity with the spectral shapes found in a quiet Sun observation from the Swedish 1-m Solar Telescope (SST)
Externí odkaz:
http://arxiv.org/abs/2310.16611
Publikováno v:
A&A 675, A130 (2023)
The shapes of Stokes profiles contain much information about the atmospheric conditions that produced them. However, a variety of different atmospheric structures can produce very similar profiles. Thus, it is important for proper interpretation of o
Externí odkaz:
http://arxiv.org/abs/2306.05748
Autor:
Udnæs, Elias R., Pereira, Tiago M. D.
Publikováno v:
A&A 675, A127 (2023)
Context. Three-dimensional non-local thermodynamical equilibrium (NLTE) radiative transfer calculations are a fundamental tool for a detailed spectral analysis in stellar atmospheres, but require vast amounts of computer power. This prevents their br
Externí odkaz:
http://arxiv.org/abs/2306.01041
Publikováno v:
A&A 662, A80 (2022)
Small scale processes are thought to be important for the dynamics of the solar atmosphere. While numerical resolution fundamentally limits their inclusion in MHD simulations, real observations at the same nominal resolution should still contain impr
Externí odkaz:
http://arxiv.org/abs/2204.08849
Publikováno v:
A&A 658, A182 (2022)
Context. Computing spectra from 3D simulations of stellar atmospheres when allowing for departures from local thermodynamic equilibrium (non-LTE) is computationally very intensive. Aims. We develop a machine learning based method to speed up 3D non-L
Externí odkaz:
http://arxiv.org/abs/2112.13852
Autor:
Bobra, Monica G., Mumford, Stuart J., Hewett, Russell J., Christe, Steven D., Reardon, Kevin, Savage, Sabrina, Ireland, Jack, Pereira, Tiago M. D., Chen, Bin, Pérez-Suárez, David
Publikováno v:
Solar Physics, 295, 57 (2020)
The SunPy Project developed a 13-question survey to understand the software and hardware usage of the solar physics community. 364 members of the solar physics community, across 35 countries, responded to our survey. We found that 99$\pm$0.5% of resp
Externí odkaz:
http://arxiv.org/abs/2003.14186
Publikováno v:
A&A 627, A46 (2019)
Context. The solar chromosphere and the lower transition region is believed to play a crucial role in the heating of the solar corona. Models that describe the chromosphere (and the lower transition region), accounting for its highly dynamic and stru
Externí odkaz:
http://arxiv.org/abs/1905.08264
Autor:
Pereira, Tiago M. D.
The interface between the bright solar surface and the million-degree corona continues to hold the key to many unsolved problems in solar physics. Advances in instrumentation now allow us to observe the dynamic structures of the solar chromosphere do
Externí odkaz:
http://arxiv.org/abs/1809.04077
Publikováno v:
A&A 611, L6 (2018)
Low-lying loops have been discovered at the solar limb in transition region temperatures by the Interface Region Imaging Spectrograph (IRIS). They do not appear to reach coronal temperatures, and it has been suggested that they are the long-predicted
Externí odkaz:
http://arxiv.org/abs/1803.04415
Autor:
Chintzoglou, Georgios, De Pontieu, Bart, Martínez-Sykora, Juan, Pereira, Tiago M. D., Vourlidas, Angelos, Beltran, Samuel Tun
We present results from an observing campaign in support of the VAULT2.0 sounding rocket launch on September 30, 2014. VAULT2.0 is a Ly$\alpha$ (1216 \AA) spectroheliograph capable of providing spectroheliograms at high cadence. Ly$\alpha$ observatio
Externí odkaz:
http://arxiv.org/abs/1803.03405