Interstellar Magnetic Fields And Gases Essay example

Interstellar Magnetic Fields And Gases Essay example

Length: 1687 words (4.8 double-spaced pages)

Rating: Better Essays

Open Document

Essay Preview

Interstellar Magnetic Fields and Gases

Interstellar magnetic fields play an important role in our galaxy by returning stellar material back out into interstellar space. The magnetic fields are frozen in place within the hot ionized gases of the interstellar medium acting as an additional energy reservoir; the magnetic fields wear several hats regarding the work that needs to be done in our galaxy. However, there is still little known about the all of the roles the ISMF plays. There is a division between large and small scale fields; the former found on the scales of the spiral arms of our galaxy, and the latter found within the interstellar space. The large scale field in the spiral arms is about 2 μG while the small scale random component is about 3 μG.1 This paper will focus on the small scale field, four of the most currently predominant methods used to measure and observe the field, other possible roles of the field, and a short review of the current theories for the origin of the field.

Without the magnetic fields, star formation would occur considerably differently because within the small scale field, charged material is moving about along the field lines via the Lorentz force:
(eq. 1)

Any charged matter with a perpendicular velocity component to B will have the electromagnetic force imposing a direction change on it. With the parallel component untouched, the magnetic

1. Sun, X. et al. "Radio observational constraints on Galactic 3D-emission models." Astronomy And Astrophysics (2008) 477, no. 2: 12-13.
field lines act as a guiding/steering mechanism. Charged interstellar material can then be herded into or away from masses or protestants. The same steering mechanism as well as particle acceleration effects are note...


... middle of paper ...


...ozen within its medium would also contort and twist into the rotation. The problem in this theory is that observations do not concur with the expected amount of twisting of the field lines. The dynamo theory, on the other hand, embraces the observed lack of twist as magnetic diffusion that is constantly countered by the activity on the small-scale. Regeneration occurs on the small scale through a process called the alpha-effect. Alpha-effect is the generation of magnetic field perpendicular to the prevailing field by small-scale turbulent, cyclonic motion; the interstellar magnetic field. The dynamo theory still relies on a magnetic field seed which may very well be the primordial magnetic field.9












9. Ferriere, Katia M. “Magnetic Fields in Galaxies: Their Origin and Their Impact on the Interstellar Medium.” Acta Astronomica Sinica vol. 44 (2003): 115-118.

Need Writing Help?

Get feedback on grammar, clarity, concision and logic instantly.

Check your paper »

The Magnetic Fields Of The Magnet Essay

- Introduction: Magnetism was not studied or utilized before 1821 as it is today. A few hundred years ago people understood how magnets worked, but didn’t have many applications of the magnet because they were limited by the technology of their time. The applications of magnets today have opened a new door as to how we can harness the power of a magnet. I had a basic working knowledge of how magnets worked, such as polarity, but with researching different aspects of the magnet I have learned that we need to advance the potential capabilities of the magnet and fully understand how we can harness the magnet....   [tags: Magnetic field, Electromagnetism, Magnetism]

Better Essays
1704 words (4.9 pages)

Magnetic Fields of Stationary Magnets Essay

- Missing figures/equations My goal in writing this paper is two fold. Goal one is to try and understand how a stationary magnet exerts force by means of a magnetic field (even across a complete vacuum). Frequently, electromagnetic fields are compared to the gravitational field. Goal two is to explore the similarities between the two types of fields to see if comparison throws any light on the mechanism of magnetic field generation. The term action-at-a-distance is often used to describe forces that travel through space and exert their effect without directly touching the objects acted upon....   [tags: physics science magnet magnetic field]

Free Essays
1224 words (3.5 pages)

Essay on The Effects Of Magnetic Permeability On The Magnetic Field

- Aeromagnetic Data Theory Scalar aeromagnetic data reflect both induced and remanent magnetic fields. Induced magnetism is caused by the earth’s magnetic field and is mainly the result of the magnetic susceptibility of the rock. Magnetic susceptibility is expressed as a unit-less proportionality constant denoted by an International System of Units (SI), which simply reflects the susceptibility of a rock to become magnetized in the presence of a magnetic field. This susceptibility is mainly a function of the rock’s magnetite content....   [tags: Magnetic field, Magnetism, Igneous rock]

Better Essays
1757 words (5 pages)

Essay on The Effects Of Magnetic Permeability On The Magnetic Field

- Aeromagnetic Data Theory Scalar aeromagnetic data reflect both induced and remnant magnetic fields. Induced magnetism is caused by the earth’s magnetic field and is mainly the result of the magnetic susceptibility of the rock. Magnetic susceptibility is expressed as a unit-less proportionality constant denoted by an International System of Units (SI), which simply reflects the susceptibility of a rock to become magnetized in the presence of a magnetic field. This susceptibility is mainly a function of the rock’s magnetite content....   [tags: Magnetic field, Magnetism, Igneous rock, Basalt]

Better Essays
1544 words (4.4 pages)

Active vs. Passive Magnetic Bearings Essay

- Introduction A magnetic bearing is a type of bearing that holds up a load using magnetic levitation. Scientists first discovered the magnetic effects in magnetic minerals in 500B.C. In the late 20th century, scientists began developing ways where this magnetic effect could be implemented into a bearing, creating magnetic bearings. Today, magnetic bearings can be found in many applications where no physical contact is required or extreme environmental conditions exists, including very high and low temperatures....   [tags: magnetic levitation, minerals]

Better Essays
1669 words (4.8 pages)

Essay Electric Magnetic Fields

- Electric Magnetic Fields Homes are filled with electric magnetic fields (EMFs), EMFs are created every time anything electrical is used. Hair dryers, alarm clocks, micro waves and radios are just a few examples. All these appliances cause leukemia, a form of cancer. High EMF fields are not very unusual. EMFs can pass through walls, so one can also be exposed to them from power lines and transformers. Using a hair dryer for 3 minutes would give the same exposure that one would get living next to a high voltage power line....   [tags: Informative, Expository]

Free Essays
297 words (0.8 pages)

The Earth Magnetic Field Essay

- It’s the magnetic field that extends from the earth’s interior to where it meets the solaria stream of charged particles emanating from the sun. The magnetic field resembles the field of a large bar magnet near its center or that due to a uniformly magnetized sphere. Its origin is thought to be generated deep down in the earth’s core. At the surface of the earth, the pole of this equivalent bar magnet, nearest the north geographical pole is actually a south” magnetic pole. This paradoxical situation exists since by convention a north seeking end of a compass needle is defined as pointing north yet must point to a pole of opposite sense or South Pole of the earth’s magnetic field....   [tags: solaria stream, magnetic storms]

Better Essays
1754 words (5 pages)

The hard drive uses two important principles about the magnetic fields.

- The hard drive uses two important principles about the magnetic fields. When we write data onto the hard drive Cit uses the law of electromagnetic induction and some material is magnetic. The hard drive uses two important principles about the magnetic fields. When we write data onto the hard drive it uses the law of electromagnetic induction and some material is magnetic. When we read data from the hard drive, it uses the Lenz's law. How hard disk drive works: Firstly we should know the two important part of the hard disk drive, 1....   [tags: Computer Science]

Free Essays
842 words (2.4 pages)

Global Warming and Greenhouse Gases Essay

- Global Warming and Greenhouse Gases The earth’s climate is predicted to change because human activities are altering the chemical composition of the atmosphere through the buildup of greenhouse gases –– primarily carbon dioxide, methane, and nitrous oxide. The heat-trapping property of these gases is undisputed. Although uncertainty exists about exactly how earth’’s climate responds to these gases, global temperatures are rising. Go to the Emissions section for much more on greenhouse gases. Energy from the sun drives the earth’’s weather and climate, and heats the earth’’s surface; in turn, the earth radiates energy back into space....   [tags: Climate Change, Greenhouse Gases]

Better Essays
650 words (1.9 pages)

Essay about The Killing Fields of Cambodia - Are they Worth Remembering?

- The Killing Fields of Cambodia - Are they Worth Remembering. “I know of no parallel to the conditions which have been experienced in Cambodia over the past decade to any other experience I have had. In the case of post-war Europe, there is the vast tragedy of the concentration camps . . . but thank God, the world had an immediate reaction and to this moment, there has been a sensitivity to events which happened forty years ago. But, in the case of Cambodia, for some extraordinary reason, I am left with the strong impression that the world wants to forget the tragedy in Cambodia – they want to forget it!” SIR ROBERT JACKSON, deputy Secretary-General, United Nations January 1983 (qtd....   [tags: Killing Fields of Cambodia]

Better Essays
4825 words (13.8 pages)