{ "id": "2211.00850", "version": "v1", "published": "2022-11-02T03:40:23.000Z", "updated": "2022-11-02T03:40:23.000Z", "title": "The dust properties of star-forming galaxies in the first billion years", "authors": [ "Elisabete da Cunha" ], "comment": "10 pages, 5 figures; invited review to appear in the Proceedings of IAU Symposium 373 - Resolving the rise and fall of star formation in galaxies", "categories": [ "astro-ph.GA" ], "abstract": "The Atacama Large Millimetre/Sub-millimetre Array (ALMA) is obtaining the deepest observations of early galaxies ever achieved at (sub-)millimetre wavelengths, and detecting the dust emission of young galaxies in the first billion years of cosmic history, well in the epoch of reionization. Here I review some of the latest results from these observations, with special focus on the REBELS large programme, which targets a sample of 40 star-forming galaxies at z~7. ALMA detects significant amounts of dust in very young galaxies, and this dust might have different properties to dust in lower-redshift galaxies. I describe the evidence for this, and discuss theoretical/modelling efforts to explain the dust properties of these young galaxies. Finally, I describe two additional surprising results to come out of the REBELS survey: (i) a new population of completely dust-obscured galaxies at z~7, and (ii) the prevalence of spatial offsets between the ultraviolet and infrared emission of UV-bright, high-redshift star-forming galaxies.", "revisions": [ { "version": "v1", "updated": "2022-11-02T03:40:23.000Z" } ], "analyses": { "keywords": [ "dust properties", "first billion", "young galaxies", "atacama large millimetre/sub-millimetre array", "alma detects significant amounts" ], "tags": [ "review article" ], "note": { "typesetting": "TeX", "pages": 10, "language": "en", "license": "arXiv", "status": "editable" } } }