Back to Home

Blackholes Forum Message

Forums: Atm · Astrophotography · Blackholes · Blackholes2 · CCD · Celestron · Domes · Education
Eyepieces · Meade · Misc. · God and Science · SETI · Software · UFO · XEphem
RSS Button

Home | Discussion Forums | Blackholes I | Post

Be the first pioneers to continue the Astronomy Discussions at our new Astronomy meeting place...
The Space and Astronomy Agora
The Physical Meaning...

Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To
Posted by Bruce on March 6, 2002 22:52:53 UTC

of the r-coordinate for the Schwarzchild geometry

r = circumference of shell / 2p

for the Kerr geometry

R^2 = r^2 + a^2 + 2Ma^2/r

r horizon = M (+ or -) (M^2 - a^2)^1/2

a = J/M [J is angular momentum and M is mass expressed as a length (meters)]

for the extreme Kerr geometry

R^2 = r^2 + M^2 + 2M^3/r [since a maximum = M]

The physical meaning of the t-coordinate is where the time interval is being measured.

These are simplified for the equatorial plane.

Follow Ups:

    Login to Post
    Additional Information
    About Astronomy Net | Advertise on Astronomy Net | Contact & Comments | Privacy Policy
    Unless otherwise specified, web site content Copyright 1994-2021 John Huggins All Rights Reserved
    Forum posts are Copyright their authors as specified in the heading above the post.
    "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET"
    are trademarks of John Huggins