Spatially Resolved Kinematics of Distant Galaxies
| dc.creator | Bershady, Matthew A. | |
| dc.date | 1996-11-05 | |
| dc.date.accessioned | 2026-07-07T02:22:14Z | |
| dc.date.available | 2026-07-07T02:22:14Z | |
| dc.description | A Tully-Fisher (TF) relation from H-alpha rotation curves of 19 luminous, star-forming galaxies reveals there is little evidence for evolution in the mass-to-light ratio (M/L) of these galaxies to z~0.3. The near-infrared Tolman surface-brightness test for other luminous galaxies indicates their luminosity also is little changed to z~0.3. In this redshift regime, internal velocity -- luminosity relations like Tully-Fisher may provide a way to measure q0. Discrepant results from several intermediate redshift Tully-Fisher surveys, however, must be understood first. One possibility is that different surveys sample different galaxy types and TF relations. Alternatively, M/L of some spiral galaxies may evolve rapidly with look-back time. Larger surveys are needed to resolve this issue. A different approach is to determine disk and halo M/L separately. Such measurements, even at low redshift, would be sensitive to the star formation histories of disks. We outline plans for lambda/dlambda ~ 10000 integral-field spectroscopy of relatively face-on spirals using the 9m Hobby-Eberly Telescope. Rotation curves and disk stellar velocity dispersions can provide statistical information about the M/L of dark halos as well as luminous disks. | |
| dc.description | 8 pages LaTeX, 5 figures (style file paspconf.sty). To appear in ``Dark and Visible Matter in Galaxies and Cosmological Implications,'' eds. M. Persic and P. Salucci, A.S.P. Conference Series (1997) | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9611036 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9611036 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/10805 | |
| dc.subject | Astrophysics | |
| dc.title | Spatially Resolved Kinematics of Distant Galaxies | |
| dc.type | text |