Spectroscopy of astrophysic al plasmas in the laboratory

Keenan, F. P.; Rose, S. J.

doi:10.1046/j.1468-4004.2003.45618.x

Cited by 5 publications

(5 citation statements)

References 12 publications

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“…On earth, tokamaks generate plasmas with very similar parameters to those of the solar corona [5]. Thus, soft x-ray emission measurements in heavy atoms including Bi and Pb have been performed in the TEXT tokamak [6].…”

Section: Introductionmentioning

confidence: 99%

The 5d → 6p EUV photoabsorption spectra of Pb II and Bi III: evidence of excited states

Varvarezos

Alli

et al. 2020

J. Phys. B: At. Mol. Opt. Phys.

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We have measured the photoabsorption spectra of Pb II and Bi III in the wavelength range between 37 and 70 nm. A number of features in the spectra have been identified with the aid of the Cowan suite of atomic codes. 5d → 6p transitions from the ground configuration (5d106s26p) and three excited configurations (5d106s26d, 5d106s27s, 5d106s6p2) give rise to the most prominent features in the measured spectra. Evidence of excited states including (5d106s6p2 (4P3/2, 4D3/2)) for Pb II and (5d106s6p2 (4P1/2, 4P3/2)) for Bi III was observed in our measurements.

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Section: Introductionmentioning

confidence: 99%

The 5d → 6p EUV photoabsorption spectra of Pb II and Bi III: evidence of excited states

Varvarezos

Alli

et al. 2020

J. Phys. B: At. Mol. Opt. Phys.

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“…Despite some recent progress in the understanding of the physical state of the ICM (Enßlin et al 2005;Enßlin & Vogt 2006;Lazarian 2006), many key parameters remain not well known. Since laboratory experiments on plasma with conditions close to those found in astronomical objects are still rare (Keenan & Rose 2004), all esti-mates of such physical properties of the ICM as the values of thermal diffusivity and viscosity are generally based on modifications of the values calculated in the classical work of Spitzer (1962). It is accepted that magnetic fields decrease the diffusivity, since they suppress movements of charged particles across the field lines.…”

Section: Introductionmentioning

confidence: 99%

Morphology of flows and buoyant bubbles in the Virgo cluster

Pavlovski¹,

Kaiser²,

Pope

et al. 2008

Monthly Notices RAS

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There is growing evidence that the active galactic nuclei (AGN) associated with the central elliptical galaxy in clusters of galaxies are playing an important role in the evolution of the intracluster medium (ICM) and clusters themselves. We use high resolution three-dimensional simulations to study the interaction of the cavities created by AGN outflows (bubbles) with the ambient ICM. The gravitational potential of the cluster is modelled using the observed temperature and density profiles of the Virgo cluster. We demonstrate the importance of the hydrodynamical Kutta-Zhukovsky forces associated with the vortex ring structure of the bubbles, and discuss possible effects of diffusive processes on their evolution.Comment: Accepted by MNRAS. High resolution pdf version http://www.astro.soton.ac.uk/~gbp/files/morphology.pd

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“…The essential problem for gamma quanta selection is a choice of background («OFF») points of measurements for increase the statistical significance of the observed signal. We use the reflected-region-background model [14] which was developed earlier for wobble observations. In TAIGA experiment the observations were carried out in wobble mode, using alternating offsets of the pointing positions of ±1.2° to the position of the Crab Nebula.…”

Section: Data Processing and Analysismentioning

confidence: 99%

Hybrid method for study multi TeV gamma rays in the TAIGA astrophysical complex: methodics and results.

Elshoukrofy,

Okuneva,

Sveshnikova

et al. 2023

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)

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The TAIGA astrophysical complex includes now 3 IACTs at the distance 300-500 m between each other and 1 km 2 area wide-angle timing array TAIGA-HiSCORE. At energies above 40 TeV, a hybrid approach to the detection of gamma-rays becomes possible -the detection of EAS by both IACTs and the TAIGA-HiSCORE installation. The main advantage of the joint operation of the IACTs and timing array HiSCORE is a good gamma/hadron separation by image parameters information, and core position, direction and energy reconstruction by the timing array data. In this paper the following topics of a hybrid method are discussed: data processing and analysis, a comparison experimental results with Monte-Carlo simulations, selection of the first events with the energy more than 100 TeV from Crab Nebula in 250 hours of observation. The data were taken during the period of installation deployment, with one IACT in operation and half of the area of TAIGA-HiSCORE installation.

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Spectroscopy of astrophysic al plasmas in the laboratory

Cited by 5 publications

References 12 publications

The 5d → 6p EUV photoabsorption spectra of Pb II and Bi III: evidence of excited states

The 5d → 6p EUV photoabsorption spectra of Pb II and Bi III: evidence of excited states

Morphology of flows and buoyant bubbles in the Virgo cluster

Hybrid method for study multi TeV gamma rays in the TAIGA astrophysical complex: methodics and results.

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