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| Status: in preparation Data link: not yet available Assessment: not yet available |
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| Title: | Rotation curves of disk galaxies at z less than 1 | |||
| Modes: | Imaging (for mask preparation) Multi-object spectroscopy |
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| Additional instrument verification: | Data reduction pipeline for imaging data and MOS data; mask preparation software; use of tilted slits. | |||
| Telescope verification: | Acquisition and guiding with GMOS for tested modes. Stability of guiding over long periods of time and large hour angles. | |||
| Proposed observing sequence: | Imaging: 4-6 dithered observations in order to cover the
gaps between the CCDs and clean the combined images for bad pixels and
cosmic-ray-events. MOS: Multiple 30-60 min exposures, no dithering. |
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| OT program file: | Not yet available | |||
| Science background: |
From HST images (e.g., HDF and flanking fields, Groth; Kron & Takamiya, ie., large range in RA) disk galaxies at redshifts of 0.1 to 1 have been identified and their structural parameters measured. The M/L ratio can be measured as a function of redshift to (1) test if optical rotation curves can be measured with emission lines ([OII] 3727 doublet) and (2) measure any systematic differences to test evolution of M/L with redshift. At early stages of SV, only 10-20 galaxies would be the goal. This program may be executed as a part of GMOS SV program 51. |
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| Target(s): | ||||
| Object | RA (J2000) | Dec (J2000) | ||
| FIELD-001728+154634 | 00:17:18.4 | 15:46:34 | ||
| FIELD-001712+154913 | 00:17:12.7 | 15:49:14 | ||
| FIELD-001719+154530 | 00:17:19.6 | 15:45:30 | ||
| FIELD-001706+154548 | 00:17:06.4 | 15:45:49 | ||
| FIELD-001719+154914 | 00:17:21.0 | 15:49:30 | ||
| Observing condition constraints: | image quality: 50%-ile (MOS), 80%-ile (imaging) sky transparency (clouds): 50%-ile, 70%-ile sky transparency (water vapour): Any sky background: 50%-ile (MOS), 80%-ile (Imaging) max air mass: 1.5 |
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| Instrument configuration: | Imaging: r', CCD binned 2x2 MOS: B600, 0.75" slitlets, CCD binned 2x2 |
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| Observing time requirements: | Imaging: 6x5 min MOS: 2-4 hours for per mask. |
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| SV team member(s) responsible for assessment: | Marianne Takamiya | |||
Last update October 12, 2001; Inger Jørgensen