Results 1 to 10 of about 371,767 (221)
Laboratory Astrophysics and the State of Astronomy and Astrophysics [PDF]
arXiv, 2009 Laboratory astrophysics and complementary theoretical calculations are the foundations of astronomy and astrophysics and will remain so into the foreseeable future. The impact of laboratory astrophysics ranges from the scientific conception stage for ground-based, airborne, and space-based observatories, all the way through to the scientific return of ...
WGLA, AAS +12 more
arxiv +6 more sources
Universe, 2021 Wormholes are hypothetical topologically-non-trivial structures of spacetime. From the theoretical point of view, the possibility of their existence is challenging but cannot be ruled out. This article is a compact and non-exhaustive review of past and current efforts to search for astrophysical wormholes in the Universe.
Cosimo Bambi, Dejan Stojkovic
openaire +3 more sources
A Case for Electron-Astrophysics [PDF]
Experimental Astronomy, 2021 AbstractThe smallest characteristic scales, at which electron dynamics determines the plasma behaviour, are the next frontier in space and astrophysical plasma research. The analysis of astrophysical processes at these scales lies at the heart of the research theme of electron-astrophysics. Electron scales are the ultimate bottleneck for dissipation of
Joachim Saur +31 more
openaire +13 more sources
On the lithium abundance of the visual binary components ξ Boo A (G8V) and ξ Boo B (K5V)
Astronomische Nachrichten, Volume 343, Issue 9-10, November-December 2022., 2022 Abstract A spectroscopic investigation of the lithium resonance doublet in ξ Boo A and ξ Boo B in terms of both abundance and isotopic ratio is presented. We obtained new R = 130,000 spectra with a signal‐to‐noise ratio (S/N) per pixel of up to 3200 using the 11.8 m LBT and PEPSI.
Klaus G. Strassmeier, Matthias Steffen
wiley +1 more source
Astronomische Nachrichten, Volume 343, Issue 9-10, November-December 2022., 2022 Abstract The advent of ultra‐precise photometry space missions enables the possibility of investigating stellar interiors with mixed modes. The structural variations induced by the discontinuity of the chemical composition left behind during the first dredge–up is an important feature in the stellar mid‐layers located between the hydrogen‐burning shell
Chen Jiang
wiley +1 more source
Space Science Reviews, 2007 The fastest pulsar and the slowest nova; the oldest galaxies and the youngest stars; the weirdest life forms and the commonest dwarfs; the highest energy particles and the lowest energy photons. These were some of the extremes of Astrophysics 2006. We attempt also to bring you updates on things of which there is currently only one (habitable planets ...
Virginia Trimble +3 more
openaire +4 more sources
Reports on Progress in Physics, 1999 Nuclear astrophysics is that branch of astrophysics which helps understanding some of the many facets of the Universe through the knowledge of the microcosm of the atomic nucleus. In the last decades much advance has been made in nuclear astrophysics thanks to the sometimes spectacular progress in the modelling of the structure and evolution of the ...
Arnould, Marcel, Takahashi, KOHJI
openaire +2 more sources
ASTROPHYSICS OF WORMHOLES [PDF]
International Journal of Modern Physics D, 2007 We consider the hypothesis that some active galactic nuclei and other compact astrophysical objects may be current or former entrances to wormholes (WHs). A broad mass spectrum for astrophysical WHs is possible. We consider various new models of the static WHs including WHs maintained mainly by an electromagnetic field.
Igor D. Novikov +3 more
openaire +3 more sources
Deep Underground Science and Engineering, Volume 1, Issue 2, Page 131-137, December 2022., 2022 General plan of the in‐situ experiment (WNS) base. Abstract This paper introduces the establishment of deep underground infrastructure for science and engineering research. First, the representative deep underground research laboratories and facilities in the world and their functions were summarized and reviewed.
Lihua Hu +5 more
wiley +1 more source
Squeeze and multi‐context attention for polyp segmentation
International Journal of Imaging Systems and Technology, Volume 33, Issue 1, Page 123-142, January 2023., 2023 Abstract Artificial Intelligence‐based Computer Aided Diagnostics (AI‐CADx) have been proposed to help physicians in reducing misdetection of polyps in colonoscopy examination. The heterogeneity of a polyp's appearance makes detection challenging for physicians and AI‐CADx.
Debayan Bhattacharya +3 more
wiley +1 more source