Description
Organisers: Andrew Blain, David Clements, Stephen Eales, Matt Griffin, Pamela Klassen, Seb Oliver, Kate Pattle, Chris Pearson, Dimitra Rigopoulou, Carole Tucker
Dust is a significant constituent of the ISM, is strongly involved in many important processes on all scales, including star formation, planet formation, ISM enrichment, and AGN structure, and hides the physics and chemistry of these processes behind a veil of obscuration. Observations at mid-IR, far-IR and submm wavelengths provide direct observations of thermal emission from this dust and allow spectroscopy to penetrate the obscuration. With the legacy of Herschel, continuing operations at JCMT and ALMA, with JWST allowing high resolution mid-IR observations, we are at a key point in our ability to understand the dust and gas in obscured regions in nearby systems, and out to the most distant objects known. Forthcoming projects, including the Simons Observatory, PRIMA and AtLAST, will provide critical new insights. This session will explore our current understanding of the dust-obscured universe, examining synergies between local and distant universe studies, and assessing what next steps are needed - observationally, theoretically and in instrumentation - to better understand the role and importance of dust and obscured processes in the universe.
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Jane Greaves (Cardiff University)07/07/2025, 09:00The Dusty Universe - Near and FarTalk
I report on the Planet Earth Building Blocks Legacy e-MERLIN Survey. PEBBLeS is an SKA Cradle of Life forerunner project, and has just completed a census of very large dust grains in massive discs in northern star-forming regions. We uncover where dust is growing large enough to overcome loss processes and so can proceed to make planets. The e-MERLIN resolution is very high and can find the...
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Aswin Payyoor Vijayan (University of Sussex)07/07/2025, 09:08The Dusty Universe - Near and FarTalk
Recent years have seen significant improvements in computational codes and hardware, incorporating novel physics and strategies to statistically explore and understand galaxy formation and evolution. A recent addition to this landscape is the COLIBRE (COLd ISM gas and Better REsolution) suite of simulations, built on the open source SWIFT simulation code. The suite of simulations includes the...
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Kate Pattle (University College London)07/07/2025, 09:16The Dusty Universe - Near and FarTalk
Advances in submillimetre dust emission polarimetry are revolutionizing our understanding of the magnetic fields which thread the interstellar media of the Milky Way and other galaxies. In this talk I will discuss the insights which we are gaining into the energy balance, dynamics and evolution of the magnetized interstellar medium from recent observations made with the POL-2 polarimeter on...
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Alice Ferreira (University of Hertfordshire)07/07/2025, 09:24The Dusty Universe - Near and FarTalk
The evolution of dust is important for understanding galaxy evolution. More detailed models of dust formation are needed to reproduce observations of dust in galaxies at high redshift, which include high dust-to-stellar mass ratios in z~7 galaxies observed with ALMA. At the same time, the moderate amount of dust at z~14 seen with JWST requires processes such as dust destruction by the...
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Julie Wardlow (Lancaster University)07/07/2025, 09:32The Dusty Universe - Near and FarTalk
The bright [CII] 158 micron line can emit up to 1% of a galaxy's far-IR luminosity and has been suggested as an efficient tracer of star-formation in high-redshift galaxies, where it is shifted in to ALMA bands 4โ7. However, a deficit of [CII] relative to IR luminosity is observed in galaxies with L_IR>10^11 L_sun, and the origins of this deficit are not yet fully understood, limiting its...
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07/07/2025, 09:40The Dusty Universe - Near and FarTalk
We use the deep imaging from the JWST PRIMER survey to study the properties of (sub)mm sources detected by ALMA in the centre of the COSMOS field, with the aim of better constraining the history of dust-enshrouded star formation. The wealth of ALMA data in this field enabled us to isolate a robust sample of 128 (sub)mm sources, spanning two decades in (sub)mm flux density. The JWST imaging is...
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Pamela Klaassen (UK Astronomy Technology Centre)07/07/2025, 09:48The Dusty Universe - Near and FarInvited talk
Current single-dish sub-mm facilities have opened new views of some of the brightest celestial sources, and interferometers have provided the exquisite resolution necessary to analyse the details in small fields. Answering questions with current generation facilities is creating the next generation questions. To go further, what we need is a facility capable of rapidly mapping large portions...
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Seb Oliver (University of Sussex)07/07/2025, 10:02The Dusty Universe - Near and FarInvited talk
Recently the PRIMA mission was selected by NASA for Phase A study. If it is selected for implementation in April 2026 it will be the first far infrared astrophysics observatory for 22 years when launched in 2031.
The observatory provides unique spectral, imaging and polarimetry capabilities from 24-235 micron with sensitivity orders of magnitude better than predecessors. PRIMA is designed...
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The Dusty Universe - Near and FarPoster
Galaxy growth has traditionally been studied from two complementary perspectives: the build-up of stellar mass as inferred from galaxy-integrated SED modelling, and the growth in size as captured by high-resolution imaging.ย Deep multi-wavelength observations are increasingly yielding rich datasets on high-redshift galaxies from UV to mm wavelengths.ย A common characteristic of such datasets is...
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The Dusty Universe - Near and FarPoster
Background: Planetary nebulae (PNe) are common in both young and old stellar populations. The planetary nebula luminosity function (PNLF) is used as a cosmological distance indicator out to the Coma cluster. The PNLF is reproduced in models only by assuming substantial internal dust extinction for PNe, but observational studies of Galactic PNe have been unable to corroborate extinction beyond...
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The Dusty Universe - Near and FarPoster
High redshift radio galaxies (HzRGs) are powerful radio-loud AGN that are thought to lie in the cores of galaxy protoclusters at z>~1, an epoch with significant contributions from dust-obscured star formation. I will present initial results from the RAdio Galaxy Environment Reference Survey (RAGERS), a JCMT/SCUBA-2 Large Program to map the overdensities of 850-um selected dusty galaxies in the...
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The Dusty Universe - Near and FarPoster
We present the magnetic field in the dense material of the Central Molecular Zone (CMZ) of the Milky Way, traced in 850 ฮผm polarized dust emission as part of the James Clerk Maxwell Telescope B-fields in STar-forming Region Observations survey. We observe a highly ordered magnetic field across the CMZ between Sgr B2 and Sgr C that is strongly preferentially aligned with the orbital gas flows...
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The Dusty Universe - Near and FarPoster
Sub-millimetre galaxies, discovered 25 years ago, remain among the most enigmatic class of objects in the Universe. Historically they have been highly challenging to reproduce in cosmologically-situated models without radical assumptions. Our Simba simulations are arguably the most successful model hydrodynamic model at reproducing the number counts of SMGs (Lovell et al 2001). In this talk...
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