Zobrazeno 1 - 10
of 512
pro vyhledávání: '"Enßlin, Torsten A."'
Reconstructing the electric field from the measured voltages in an antenna, unfolding the antenna response, comes with several problems. Due to the noisiness of the signal it is often necessary to disregard part of the bandwidth of the antenna. It is
Externí odkaz:
http://arxiv.org/abs/2409.14970
Autor:
Eberle, Vincent, Guardiani, Matteo, Westerkamp, Margret, Frank, Philipp, Rüstig, Julian, Stadler, Julia, Enßlin, Torsten A.
Many advances in astronomy and astrophysics originate from accurate images of the sky emission across multiple wavelengths. This often requires reconstructing spatially and spectrally correlated signals detected from multiple instruments. To facilita
Externí odkaz:
http://arxiv.org/abs/2409.10381
Autor:
Kim, Jong-Seo, Mueller, Hendrik, Nikonov, Aleksei S., Lu, Ru-Sen, Knollmueller, Jakob, Ensslin, Torsten A., Wielgus, Maciek, Lobanov, Andrei P.
The galaxy M87 is one of the prime targets for high resolution radio imaging pursuing the ringlike shadow of its supermassive black hole, the innermost regions of accretion flow, and the formation of the relativistic jet. However, it remains challeng
Externí odkaz:
http://arxiv.org/abs/2409.00540
Nested sampling (NS) is a stochastic method for computing the log-evidence of a Bayesian problem. It relies on stochastic estimates of prior volumes enclosed by likelihood contours, which limits the accuracy of the log-evidence calculation. We propos
Externí odkaz:
http://arxiv.org/abs/2408.09889
Faraday rotation contains information about the magnetic field structure along the line of sight and is an important instrument in the study of cosmic magnetism. Traditional Faraday spectrum deconvolution methods such as RMCLEAN face challenges in re
Externí odkaz:
http://arxiv.org/abs/2407.16762
Autor:
Kim, Jong-Seo, Nikonov, Aleksei S., Roth, Jakob, Ensslin, Torsten A., Janssen, Michael, Arras, Philipp, Mueller, Hendrik, Lobanov, Andrei P.
Publikováno v:
A&A 690, A129 (2024)
Self-calibration methods with the CLEAN algorithm have been widely employed in Very Long Baseline Interferometry (VLBI) data processing in order to correct antenna-based amplitude and phase corruptions present in the data. However, human interaction
Externí odkaz:
http://arxiv.org/abs/2407.14873
Autor:
Söding, Laurin, Edenhofer, Gordian, Enßlin, Torsten A., Frank, Philipp, Kissmann, Ralf, Phan, Vo Hong Minh, Ramírez, Andrés, Zhandinejad, Hanieh, Mertsch, Philipp
The spatial distribution of the gaseous components of the Milky Way is of great importance for a number of different fields, e.g. Galactic structure, star formation and cosmic rays. However, obtaining distance information to gaseous clouds in the int
Externí odkaz:
http://arxiv.org/abs/2407.02859
Autor:
Ramírez, Andrés, Edenhofer, Gordian, Enßlin, Torsten A., Frank, Philipp, Mertsch, Philipp, Phan, Vo Hong Minh, Söding, Laurin, Zhandinejad, Hanieh, Kissmann, Ralf
Cosmic rays (CRs) play a major role in the dynamics of the interstellar medium (ISM). Their interactions and transport ionize, heat, and push the ISM thereby coupling different regions of it. The spatial distribution of CRs depends on the distributio
Externí odkaz:
http://arxiv.org/abs/2407.02410
Autor:
Roth, Jakob, Frank, Philipp, Bester, Hertzog L., Smirnov, Oleg M., Westermann, Rüdiger, Enßlin, Torsten A.
Context: Interferometric imaging is algorithmically and computationally challenging as there is no unique inversion from the measurement data back to the sky maps, and the datasets can be very large. Many imaging methods already exist, but most of th
Externí odkaz:
http://arxiv.org/abs/2406.09144
Publikováno v:
A&A 687, L9 (2024)
Recent advancements in 3D dust mapping have transformed our understanding of the Milky Way's local interstellar medium, enabling us to explore its structure in three spatial dimensions for the first time. In this Letter, we use the most recent 3D dus
Externí odkaz:
http://arxiv.org/abs/2404.09592