An accretion disc poloidal magnetic field refers to a type of magnetic field that is present in accretion discs, which are disks of gas and dust that surround objects such as black holes or young stars. This type of magnetic field is oriented in a circular fashion and is responsible for shaping and controlling the behavior of the accretion disc.
The right hand rule and left hand rule refer to different ways of determining the direction of the magnetic field. In the right hand rule, the direction of the magnetic field is determined by pointing the thumb of the right hand in the direction of the current and curling the fingers, which will indicate the direction of the magnetic field. In the left hand rule, the same process is followed but with the left hand. The choice of which rule to use depends on the convention used in the specific scientific field.
The poloidal magnetic field in an accretion disc is generated through the process of dynamo, which involves the conversion of kinetic energy and differential rotation of the accretion disc into magnetic energy. This process is similar to the one responsible for generating the Earth's magnetic field.
The poloidal magnetic field plays a crucial role in shaping and controlling the behavior of accretion discs. It is responsible for channeling the gas and dust into the central object, as well as for the formation of jets and outflows. Understanding the strength and behavior of this magnetic field is essential for studying the evolution and dynamics of accretion discs.
Yes, the direction of the poloidal magnetic field in an accretion disc can change over time due to various factors such as turbulence, magnetic reconnection, and interactions with other objects. This can have a significant impact on the behavior and evolution of the accretion disc and is an area of ongoing research in the scientific community.
