Extreme_Galaxies - 26 - Extreme Galaxies: Star Bursts to...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 26 - Extreme Galaxies: Star Bursts to Quasars Arthur Eddington 2 Extreme Galaxies What makes a galaxy extreme? What types are extreme? Active Galactic Nuclei driven Star Burst driven Combination Their distribution? In space In time 3 Luminosity Functions Schechter Function- common for galaxies ( 29 * * * * exp L dL L L L L L d - = Log (Luminosity) Log( (L)) * L * Exponential Cut-off Power-Law slope 4 Luminosity function dissected by galaxy type 5 The Luminosity Function and what does it tell us? Most galaxies are faint, they have low luminosity (the M stars of the Universe) At high luminosity there are relatively few galaxies; they are rare. (the O stars) The high luminosity galaxies come in many flavors, types and names: QSO or Quasars AGN, Active Galactic Nuclei Seyfert galaxies, type 1 and 2 Star Burst galaxies ULIRGs Ultra Luminous IR Galaxies etc. 6 The Good News There are only two ways to generate enormous energy: Star formation and evolution Black Holes accreting matter The high luminosity galaxies generally use both mechanisms to varying extents SB ULIRGs AGN QUASARS Stars Black Holes Strong Force Gravity There are only two ways to generate enormous energy: Star formation and evolution Black Holes accreting matter The high luminosity galaxies generally use both mechanisms to varying extents SB ULIRGs AGN QUASARS Stars Black Holes Strong Force Gravity 7 Starburst galaxies Stars are forming at a rapid pace up to 1000M Sun /yr. The Milky Way is forming stars at the rate of about 1M Sun...
View Full Document

This note was uploaded on 04/05/2009 for the course ASTRO 3332 taught by Professor Houck,j during the Spring '09 term at Cornell University (Engineering School).

Page1 / 33

Extreme_Galaxies - 26 - Extreme Galaxies: Star Bursts to...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online