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Zach Vanderbosch has the final talk of #DustDevils24 who is presenting a census of white dwarfs hosting transiting planetary debris, there are now 21 systems split into two categories: those near/within the Roche radius and those beyond the Roche radius

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Akshay Robert talks about the frequency of transiting planetary systems around polluted white dwarfs by searching for transits in the TESS lightcurves and found a planet fraction of 0.8%. Also finds short-period Kronian planets are unlikely to occur around WDs #DustDevils24

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I am up next talking about the white dwarf opportunity: which rocks and minerals make up a planet? #DustDevils24

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Jay Farihi talks about dust disc observations over the years from early observations of Spitzer to brand new JWST spectra #DustDevils24

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Ayaka Okuya talks about modelling white dwarf dust disks. There is excess NIR emission, if you add amorphous carbon the increase in the NIR radiation is negligible, but adding metallic Fe does increase the NIR radiation #DustDevils24

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Érika Le Bourdais talks about improving models of WD1145, a polluted white dwarf with a circumstellar disk. Érika has a disk model and a white dwarf model and discovers 18 elements in the planetary material that accreted onto WD1145 (8 new) and it resembles CI chondrites #DustDevils24

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Final talk of session 1 from Gergely Hajdu who presents work on RR Lyrae stars, when looking at 27,000 RRL lightcurves, found 87 candidate binaries, and in doing so additionally found that some change mean brightness with time #DustDevils24

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Brenda Matthews talks about a survey of 23 GPI imaged disks showing outliers with lots of asymmetries, and some show examples of planet-disk interactions. More results are presented in Brenda’s advisees papers: Crotts et al. 2022 and 2023 #DustDevils24

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They grind the sample to dust and use laboratory equipment to measure the absorption spectra. The shock going through the atmosphere doesn’t propagate to the interior so the material composition is preserved :)

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Jonathan Marshall talks about searching for variable near and mid infrared photometry and finds with NEOWISE photometry a handful of new variable candidates within 200pc volume (and confirms some already known variable systems) #DustDevils24

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Kate Su talks about extreme debris disks and new JWST data that shows some extreme debris disks have mid-infrared features dominated by silica dust and some by forsterite dust, all a work in progress and we look forward to the conclusions in the next meeting! :) #dustDevils24

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Andrew Swan kicks off the final day of #DustDevils24 with a review on Extreme Debris Disks (those systems with fractional luminosities > 1%) - including lots of fun information on white dwarf disks, a topic close to my heart

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William C. Danchi talking about the MATISSE instrument and its capabilities for detections of discs, and spoke about recent mid-infrared studies of HD 144432 that find iron-rich dust fits better to the mid infrared data than carbon rich dust #DustDevils24

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Vasuda Trehan talks about predictive models that can be used to work out if a planet is habitable or not. These trained machine learning models can be used to predict the conditions of the habitable zone and quantify/model the effects of exozodiacal dust #DustDevils24

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Philippe Priolet talks about VLTI observations of Beta Pic which detects circumstellar emission in the L band and modelling of the dust which provides spatial constraints on the data #DustDevils24

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Thomas Stuber talks about how large dust grains could have a significant impact on the observational appearance of host dust and therefore should be considered when modelling exozodiacal dust #DustDevils24

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Kevin Ollmann talks about how hot exozodiacal dust has an impact on close-in exoplanets for certain dust grain radii, larger dust mass, and certain phase angles, but there are different polarimetric signatures for hot exozodiacal dust and close-in planets

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Post coffee break, Germain Garreau talks about constraining the exozodiacal dust disk around θ Boo with the LBTI. Modelling of 3 observations show changes that may be due to outside dust moving to the habitable zone via PR drag #DustDevils24

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Mark Wyatt on where is the exozodi dust coming from? Wyatt 2005 paper says PR drag not important, but new and improved models say it seems to be. To test models looked at the dust distribution in Fomalhaut - it is consistent with PR drag #DustDevils24

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Yu-Chia Lin on how dust within the inner working angle can impact observations using high contrast imaging, and a correction factor is needed which depends on the design of the coronagraph and the observed wavelength #DustDevils24

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John Debes on how we need to understand exozodis more as they have significant impacts on direct imaging surveys for habitable zone planets. Architectures will be picked soon for e.g. Habitable Worlds Observatory so it is important to focus on understanding exozodis - see the upcoming SAG 23 report

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Back after lunch with a session on Exozodiacal Dust, Virginie Faramaz started off with a great review talk on the topic #DustDevils24

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Sai Krishanth Pulikesi Mannan discussing how Non-Negative Matrix Factorisation (NMF) is better for debris discs as you get a better contrast, SNR, throughput, and it conserves morphology better. NMF is computationally difficult but if you use GPUs then it is easier/more feasible #DustDevils24

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Justin Hom now presenting own work on a simulation and characterisation pipeline for Debris Discs with Roman with the aim to demonstrate the power of Roman in detecting and resolving warm debris belts and exozodiacal dust - can retrieve parameters of the input disc #DustDevils24

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Justin Hom talks on behalf of Ramya Anche about simulating observations with the Roman Coronagraph Instrument. Ramya has conducted end-to-end polarisation observation simulations through the HLC and SPC modes - useful for optimised observation planning, estimating uncertainties, and errors

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Yiwei Chai talks about JWST MIRI IFU observations of the n-Tel system being used to learn about how dynamical interactions shape the system, the work is in prep so keep an eye on the literature for the exciting results #DustDevils24

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Raphaël Bendahan-West talks about JWST images of 3 debris discs with gaps that all have an inner planet that is causing a proper motion anomaly - JWST non-detections show that the planet causing the proper motion anomaly is not the one truncating the inner edge of the disc #DustDevils24

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Grace Batalla Falcon showed us infrared absorption spectra and opacities from 23 meteorites collected from the Atacama Desert (3 carbonaceous chondrites, 6 ordinary type H, and 14 ordinary type L/LL) #DustDevils24

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Simon Anghel talks about a network of telescopes that are tracking meteors as they come through the Earth’s atmosphere, with one meteor being observed before it hit the atmosphere which meant it was well tracked and 49 meteorites were found from this object in Northern France #DustDevils24

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Back for day 4 of #DustDevils24 and we are starting the day off closer to home with a great review talk from Bryce Bolin about the Solar System as a debris disk

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Final talk of the session by Arcelia Hermosillo Ruiz who has been running REBOUND N-body simulations with inclined eccentric planets to try and explain the periodic clouds on one side of the disc in AU Mic - simulations are able to produce some puffs in the left hand side of the disc #DustDevils24

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Pedro Poblete Rivera talks about simulations with the REBOUND N-body code to study the effect of the secular gravitational perturbation of an inclined planet on a self-gravitating and narrow disc. All simulations reach a quasi-coplanar alignment between the planet and the disc #DustDevils24

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Max Sommer talks about how zodi structures can be caused by small eccentric terrestrial planets. This leads to an apsidal alignment in nearby migrating particles which generates a distinct double crescent substructure which look so clear in the simulated figures! #DustDevils24

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Hiroshi Kobayashi investigates the effect of collisional damping in a collisional cascade in a debris disc by conducting collision and velocity evolution simulations and finds that collisional damping is inefficient in a mature collisional cascade #DustDevils24

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Nice review on Collisions in debris discs from a theoretical perspective from Torsten Löhne #DustDevils24 to kick off the next session of talks

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Final talk of this session by Carey Lisse on the Moth. The Moth has a stellar component and an extended halo when observed in X-rays with CHANDRA - this implies that there is stellar wind and local ISM interaction #DustDevils24

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Mark Booth talking about AtLAST (Atacama Large Aperture Submillimeter Telescope) - it gives the same resolution at shorter wavelengths as ALMA and sensitive to large scale structure, and possible to detect inner disc emission. Plus solar system and high-z applications! #DustDevils24

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Next up is Antoine Lacquement who talked about using observations and N-body simulations of beta pic to predict an additional planet on top of Beta pic b and c in the system #DustDevils24

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Antranik Sefilian kicks off day 3 of #DustDevils24 giving a comprehensive review on dynamics theory in debris disks

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