Relative magnitudes and phases of bremsstrahlung and cyclotron cooling from off-axis accretion shocks onto magnetic white dwarfs

Other Title(s)

الأقدار و الأطوار النسبية لإشعاع الكبح و التبريد السيكلوتروني من صدمات التركام اللامحورية في الاقزام البيض المغناطيسية

Dissertant

al-Busul, Mutazz Husayn Muhammad

Thesis advisor

Umari, Husayn Yusuf Rashid
Sabat, Hanna Antoine

Comitee Members

Kandalyan, Rafiq A.
Rabi, Iqab Mahmud
Batayinah, Barakat

University

Al albayt University

Faculty

Institute of Astronomy and Space Sciences

University Country

Jordan

Degree

Master

Degree Date

2009

English Abstract

The thesis is a calculation of relative magnitudes and relative phases for Bremsstrahlung and cyclotron emissions from radiative accretion shocks onto binary Magnetic white dwarf star.

The calculation is being performed for a 3.0 solar mass star MS, having a magnetic field B* = 30MG and accretion rate of L acc = 3.2 x 10-3 LEdd.

Here LEdd is the Edenton accretion luminosity.

Eddington luminosity (sometimes also called the Eddington limit) which is defined as the point where the gravitational force inwards equals the continuum radiation force outwards, assuming hydrostatic equilibrium and spherical symmetry.

Using the mass-luminosity relation, it can be used to set limits on the maximum mass of a star.

If the luminosity of a star exceeds the Eddington luminosity of a layer on the stellar surface, , a star would initiate a very intense continuum driven stellar wind from its outer layers.

The phenomenon is named in honor of Sir Arthur Stanley Eddington. Individual off-axis accretion funnels are being investigated corresponding to radii at which field lines strike the equatorial plane (a o = r eq / R = 50, 33, 25, 20, 14 and 10).

Main Subjects

Astronomy

No. of Pages

76

Table of Contents

• APA
• MLA
• AMA

Language

English

Data Type

Arab Theses

Record ID

BIM-314957