Relationship between disk thickness and diameter in spiral galaxies

Subject: Relationship between disk thickness and diameter in spiral galaxies

Date: Sat Apr 2 20:48:57 2005
Posted by Barry Pyne
Grade level: undergrad School: No school entered.
City: No city entered. State/Province: No state entered. Country: No country entered.
Area of science: Astronomy
ID: 1112496537.As

Message:


I have noticed that the relationship between mass and diameter in spiral 
galaxies seems to follow a power law that better fits the SQUARE of the 
radius, rather than the CUBE of the radius that one would expect for a 
volumetric relationship. The only way I can explain this is if disk thickness 
does not vary in a one to one linear fashion as diameter changes. I want to 
know what the true mathematical relationship is, if indeed it is known.

Re: Relationship between disk thickness and diameter in spiral galaxies

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