Dust attenuation measurement for high-redshift dwarf galaxies
| Main Author: | Alavi, Anahita |
|---|---|
| Format: | info Proceeding Journal |
| Terbitan: |
, 2021
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/4428816 |
Daftar Isi:
- The important contribution of faint star-forming galaxies (i.e., dwarf galaxies) in the cosmic star formation density, makes them a primary target for the future surveys. However, observational limitations do not allow for strong constrains on the dust attenuation and thus the intrinsic star formation rate of dwarf galaxies. Also, the dust correction relations extensively used for brighter galaxies may not work for fainter galaxies as some recent hydro-dynamical simulations show that these objects follow a divergent path of star formation history. We exploit two large HST surveys WISP and HFF - targeting a broad range of high-redshift dwarf galaxies - to do a comprehensive measurement of dust attenuation for these low-mass sources. We conduct a spectroscopic survey of ultra-faint lensed dwarf galaxies from HFF at 1<z<3 using MOSFIRE on Keck. In addition, WISP suited for probing rarer, higher-mass dwarf galaxies (emission-line selected sources with faint continuum) will complement these magnified observations. However, this combined sample of low mass galaxies still suffer from small number statistics. In the near future, the Roman Space Telescope with grism slitless spectroscopy covering a very large area of >0.2 sq deg, will provide emission line measurements for thousands of high-redshift galaxies. This will enable us to measure the dust attenuation for a large sample of low-mass star-forming galaxies at high redshifts.