Journal
ASTROPHYSICAL JOURNAL LETTERS
Volume 762, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2041-8205/762/1/L11
Keywords
galaxies: evolution; galaxies: fundamental parameters; galaxies: kinematics and dynamics; galaxies: spiral
Categories
Funding
- Rhodes Trust
- Royal Society
- B.F.W.G.
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [909159] Funding Source: National Science Foundation
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In order to determine what processes govern the assembly history of galaxies with rotating disks, we examine the stellar mass Tully-Fisher (TF) relation over a wide range in redshift partitioned according to whether or not galaxies contain a prominent bulge. Using our earlier Keck spectroscopic sample, for which bulge/total parameters are available from analyses of Hubble Space Telescope images, we find that bulgeless disk galaxies with z > 0.8 present a significant offset from the local (TF) relation whereas, at all redshifts probed, those with significant bulges fall along the local relation. Our results support the suggestion that bulge growth may somehow expedite the maturing of disk galaxies onto the (TF) relation. We discuss a variety of physical hypotheses that may explain this result in the context of kinematic observations of star-forming galaxies at redshifts z = 0 and z > 2.
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