| Autor: |
Wang, Weichen, Kassin, Susan, Koo, David C., Barro, Guillermo, Cunningham, Emily, de la Vega, Alexander, Faber, Sandy M., Guhathakurta, Raja, Guo, Yicheng, Pacifici, Camilla, Simons, Raymond, Weiner, Ben, Yesuf, Hassen |
| Rok vydání: |
2019 |
| Předmět: |
|
| DOI: |
10.5281/zenodo.2595180 |
| Popis: |
At intermediate to high redshifts, measuring galaxy kinematics beyond 1 effective radius is time-consuming even for 10 m-class telescopes (>10 hours per galaxy). This poses a major challenge for future deep spectroscopic galaxy surveys. We introduce a novel strategy to make use of the multi- object spectrograph to improve observation efficiency in deep galaxy kinematic surveys, which is feasible for current major ground-based facilities like VLT and KECK and complementary to ongoing KMOS IFU observations. About one hundred star-forming galaxies at z~1 are observed with the KECK/DEIMOS instrument. Each object is observed with slits in multiple position angles to cover the full galaxy, and with a total of 10-30 hours on source. Rotation curves up to 1-3 effective radii can be constrained from optical emission lines, and the stellar-mass Tully-Fisher relation is presented. Finally, we discuss whether the turn-over of rotation curves is common for the star-forming galaxies in our sample. This may put constraint on the fraction of baryon-dominated systems at this epoch. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
