HST imaging for an immediate study of the ISM in z=4.5 galaxies
Abstract
The redshift range 44), and important insights into the star-formation properties of early galaxies. The synergy of HST and ALMA (probing different wavelengths at similar resolution) is powerful to carry out a detailed resolved multi-wavelength study of the ISM. We selected 6 galaxies at z=4.5 with extended FIR and [CII] emission of complex morphology from brand-new ALMA data. Furthermore, ACS/F814W data suggests clumpy UV emission or galaxy mergers. We propose for F105W+F160W imaging to provide the crucial deep UV coverage and resolution to complete the spatially resolved multi-wavelength analysis of these precious galaxies for which currently only low-resolution ground-based near-IR data is available. These observations allow us to (i) constrain the UV continnum on kpc scales to study, together with FIR continuum, the distribution of dust, (ii) quantify the amount of dust-obscured star-formation at z>4, and (iii) spatially correlate [CII] emission and star-formation. This program builds an immediate basis for follow-up with ALMA, JVLA, and JWST.
- Publication:
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HST Proposal
- Pub Date:
- March 2019
- Bibcode:
- 2019hst..prop15692F