Uncovering Drivers of Disk Assembly: Bulgeless Galaxies and the Stellar Mass Tully-Fisher Relation
Abstract
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.
Additional Information
© 2013 American Astronomical Society. Received 2012 November 6; accepted 2012 November 27; published 2012 December 12. S.H.M. thanks the Rhodes Trust and B.F.W.G. for supporting this work. M.S. acknowledges support from the Royal Society. We thank K. Bundy for stellar mass estimates and spectral reduction, as well as A. Newman for spectral reduction, and helpful discussions with T. Treu. We thank the anonymous referee for helpful comments. Facilities: Keck:I (LRIS), Keck:II (DEIMOS), HSTAttached Files
Published - 2041-8205_762_1_L11.pdf
Files
| Name | Size | Download all |
|---|---|---|
|
md5:975f391500efcbd68422352ba5c2586d
|
656.3 kB | Preview Download |
Additional details
- Eprint ID
- 36462
- Resolver ID
- CaltechAUTHORS:20130118-082559895
- Rhodes Trust
- B.F.W.G.
- Royal Society
- Created
-
2013-01-18Created from EPrint's datestamp field
- Updated
-
2021-11-09Created from EPrint's last_modified field