On Solar Intermediate Drift Radio Bursts at Decimeter and Meter Wavelength     

G. Rausche  H. Aurass  G. Mann  M. Karlický  C. Vocks 《Solar physics》2007,245(2):327-343

Fiber – or intermediate drift – bursts are a continuum fine structure in some complex solar radio events. We present the analysis of such bursts in the X17 flare on 28 Oct. 2003. Based on the whistler wave model of fiber bursts we derive the 3D magnetic field structures that carry the radio sources in different stages of the event and obtain insight into the energy release evolution in the main flare phase, the related paths of nonthermal particle propagation in the corona, and the involved magnetic field structures. Additionally, we test the whistler wave model of fiber bursts for the meter and the decimeter wave range. Radio spectral data (Astrophysikalisches Institut Potsdam, Astronomical Observatory Ond?ejov) show a continuum with fibers for ≈?6 min during the main flare phase. Radio imaging data (Nançay Radio Heliograph) yield source centroid positions of the fibers at three frequencies in the spectrometer band. We compare the radio positions with the potential coronal magnetic field extrapolated from SOHO/MDI data. Given the detected source site configuration and evolution, and the change of the fiber burst frequency range with time, we can also extract those coronal flux tubes where the high-frequency fiber bursts are situated even without decimeter imaging data. To this aim we use a kinetic simulation of whistler wave growth in sample flux tubes modeled by selected potential field lines and a barometric density model. The whistler wave model of fiber bursts accurately explains the observations on 28 Oct. 2003. A laterally extended system of low coronal loops is found to guide the whistler waves. It connects several neighboring active regions including the flaring AR 10486. For varying source sites the fiber bursts are emitted at the fundamental mode of the plasma frequency over the whole range (1200?–?300 MHz). The present event can be understood without assuming two different generation mechanisms for meter and decimeter wave fiber bursts. It gives new insight into particle acceleration and propagation in the low flare and post-CME corona.  相似文献   

Editor's note     

C. John Mann 《Mathematical Geosciences》1989,21(8):959-960

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The out of ecliptic distribution of interplanetary dust and its relation to other bodies in the solar system     

Ingrid Mann 《Earth, Moon, and Planets》1995,68(1-3):419-426

We discuss the out-of-ecliptic component of the interplanetary dust cloud and its relation to the other small bodies in the solar system. The determination of the mass loss of comets, so far is quite uncertain and doesn't allow a finite study of the mass input to the dust cloud. However it is shown, that the dust particles in the inner solar system, i.e. within the earth orbit are most probable produced from a collisional evolution of larger, meteoroid, fragments of cometary origin. A further component of interstellar dust is especially important in the outer solar system and perhaps for the collisional evolution of the small bodies.  相似文献   

Editor's note     

C. John Mann 《Mathematical Geology》1985,17(8):853-872

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Mathematical formalization of stratigraphic terminology     

I. Dienes  C. John Mann 《Mathematical Geology》1977,9(6):587-603

Some concepts and terminology of stratigraphy are expressed in terms of mathematical set notation. This formalized statement of traditional geologic concepts will facilitate computer manipulation of stratigraphic data. Set notation may be easily adapted to definition of rock units, stratigraphic order, stratigraphic correlation, time relationships, and fossil zonation.  相似文献   

Estimate of plasma parameters in a coronal loop by means of a fiber burst     

H. Aurass  J. Kurths  G. Mann  G. P. Chernov  M. Karlický 《Solar physics》1987,108(1):131-137

Analyzing a fiber burst occurring in the event on 19 August, 1981, plasma parameters of the burst source volume are estimated by means of Kuijpers' (1975) fiber burst model. The derived height dependence of the density in a coronal loop agrees with an isothermal barometric loop atmosphere.  相似文献   

Book review     

D. F. Watson  A. G. Journel  C. John Mann 《Mathematical Geology》1986,18(1):147-152

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Book reviews     

John M. Cubitt  W. E. Sharp  Thomas A. Jones  C. John Mann 《Mathematical Geology》1986,18(7):701-710

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Toward a theoretical stratigraphy     

C. John Mann 《Mathematical Geology》1977,9(6):649-652

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Physical oceanography, food chains, and fish stocks: a review   总被引：10，自引：2，他引：10  

Mann  K. H. 《ICES Journal of Marine Science》1993,50(2):105-119

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