| |
 |
| Paper: |
Implications of a Universal Scaling Relation for Galaxies |
| Volume: |
396, Formation and Evolution of Galaxy Disks |
| Page: |
381 |
| Authors: |
Zaritsky, D.; Zabludoff, A.I.; Gonzalez, A.H. |
| Abstract: |
We present a scaling relation that is satisfied by all classes of galaxies, ranging from dwarf spheroidals to brightest cluster galaxies and from disks to spheroidals, log re−log V2+log Ie+logΥe+0.8 = 0, where re is the half light radius in kpc, V is a measure of the internal kinematics in km/sec, Ie is the surface brightness within re in L⊙ pc−2, and Υe is the I-band mass to light ratio within re. The low scatter with which galaxies lie about this relationship (0.09 dex) implies a regularity among galaxies that is encouraging to those attempting to uncover the basic physics of galaxy formation and places disk galaxies within the context of all galaxies. |
|
|
|
|
|
