Articles liés à MAGNETIC FLUX TUBES IN LATE-TYPE STARS: PROPAGATION...

MAGNETIC FLUX TUBES IN LATE-TYPE STARS: PROPAGATION AND GENERATION OF TRANSVERSE WAVES IN MAGNETIC FLUX TUBES - Couverture souple

Ahmed, Towfiq

 
9783639108583: MAGNETIC FLUX TUBES IN LATE-TYPE STARS: PROPAGATION AND GENERATION OF TRANSVERSE WAVES IN MAGNETIC FLUX TUBES
Couverture souple
ISBN 10 : 3639108582 ISBN 13 : 9783639108583
Editeur : VDM Verlag Dr. Müller, 2009

Synopsis

One of the most important and still unsolved problems in stellar astrophysics is to identify the basic physical processes that are responsible for the extensive heating of the chromosphere and corona in late-type stellar atmospheres. Two widely accepted ways of heating are due to acoustic wave in non-magnetic region, and MHD (magneto- hydrodynamic) waves in the concentrated magnetic flux tube region. Out of three different MHD tube modes (transverse, longitudinal and torsional) this study only involves the propagation and generation of the transverse tube wave, which are the most efficient means of energy transfer in the stellar atmosphere. The current research has two components. First, starting from the general properties of magnetic flux tubes, propagation of stellar transverse tube waves and corresponding cutoff frequencies are determined analytically for the first time for non-isothermal stellar atmospheres. Second, the rate of transverse wave energy generation at the stellar surface at a given height has been calculated analytically for linear tube wave, and numerically for nonlinear tube wave in late-type stars for the first time.

Les informations fournies dans la section « Synopsis » peuvent faire référence à une autre édition de ce titre.

Présentation de l'éditeur

One of the most important and still unsolved problems in stellar astrophysics is to identify the basic physical processes that are responsible for the extensive heating of the chromosphere and corona in late-type stellar atmospheres. Two widely accepted ways of heating are due to acoustic wave in non-magnetic region, and MHD (magneto- hydrodynamic) waves in the concentrated magnetic flux tube region. Out of three different MHD tube modes (transverse, longitudinal and torsional) this study only involves the propagation and generation of the transverse tube wave, which are the most efficient means of energy transfer in the stellar atmosphere. The current research has two components. First, starting from the general properties of magnetic flux tubes, propagation of stellar transverse tube waves and corresponding cutoff frequencies are determined analytically for the first time for non-isothermal stellar atmospheres. Second, the rate of transverse wave energy generation at the stellar surface at a given height has been calculated analytically for linear tube wave, and numerically for nonlinear tube wave in late-type stars for the first time.

Biographie de l'auteur

Born: Dhaka, Bangladesh in Nov 10, 1978. Education: BSc in physics and mathematics from Univ of Texas at Arlington. MSc from the same university under supervision of Dr. Zdzislaw Musielak. Currently enrolled in PhD program at the Univ of Washington. Family: Youngest son of Amzad(Late) and Fahmida Hossain. Married to Mumu Mahruba Mahbub.

Les informations fournies dans la section « A propos du livre » peuvent faire référence à une autre édition de ce titre.

Éditeur
VDM Verlag Dr. Müller
Date d'édition
2009
Langue
anglais
ISBN 10 
3639108582
ISBN 13 
9783639108583
Reliure
Broché
Nombre de pages
112
Coordonnées du fabricant
non disponible
Personne responsable
non disponible