| 1. |
- Bååth, Lars B.
(författare)
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Radio Wave Interferometer Measurements of Slag Depth
- 2003
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Ingår i: Iron & Steel society international technology conference and exposition 2003. - : Iron and Steel Society. ; , s. 875-882
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- During the past decade software to control metallurgical processes has improved to require new physical sensors for feedback. We present a non-invasive interferometric technique to simultaneously measure multiple levels in dynamic metallurgical processes, e.g. the foam-, slag-, emulsion-, and steel-layers in furnaces. The measurements are continuous and on-line during production.
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| 2. |
- Chu, H.S., et al.
(författare)
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Discovery of Helical Magnetic Fields in AGN and CME and Ejection of Large Scale Magnetic Fields from AGN
- 2003
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Ingår i: Symposium - International astronomical union. - : International Astronomical Union. - 0074-1809. ; 214, s. 303-310
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Tidskriftsartikel (refereegranskat)abstract
- Magnetic Fields are the crucial and most important ingredient involved in the processes of various violent activities in Active Galactic Nuclei and other celestial bodies. The generally accepted 2-sided symmetric-jets model of active galactic nuclei (AGN) does not include the magnetic fields. We present here the first direct detection of helical magnetic field in AGN, and the first direct detection of ejection of large scale magnetic fields from AGN. (CME) 2. The annular (helical) magnetic field is responsible for the collimation of the jet (through Pinch Effect) and may be of crucial importance for extraction of black hole rotational energy. 3. The CMEs are responsible for sporadic ejection of jet components in AGN, while the general accepted 2-sided jets pertain to the quiescent Jets. 4.Observations show that the CME with Asymmetric Jets can explain many phenomena and much of the morphological diversities in AGN.
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| 3. |
- Rantakyrö, F.T., et al.
(författare)
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Multifrequency interferometer and radio continuum monitoring observations of CTA 102
- 2003
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Ingår i: Astronomy and Astrophysics. - Berlin : Springer. - 0004-6361 .- 1432-0746. ; 42:5, s. 473-485
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Tidskriftsartikel (refereegranskat)abstract
- This paper represents the work of several years of observation of CTA 102 with both single dish telescopes andinterferometric arrays, covering wavelengths from 1.2 cm to 1.3 mm. The resolution of the maps covers an order of magnitudefrom 0.5 mas to 50 μas. The images presented demonstrate the rapid structural changes in this source. These rapid structuralchanges correlates with the outbursts seen in the total flux, turnover frequency and in the spectral index. We have calculated theBrightness Temperatures of the components (TB ) directly from the determined component sizes and also using the logarithmicvariability amplitudes and timescales to calculate the TB s. Both the methods yielded measurements of source frame T Bs nohigher than∼a few × 1012K. We find that the observed average proper motion is0.4 0.07 mas/yr, which corresponds to anapparent transverse velocity of 11± 2 c.
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