Tootfinder

Measuring the Two-Dimensional Thermal Structures of Protoplanetary Disks
Anna J. Fehr, Sean M. Andrews
https://arxiv.org/abs/2509.15196 https://arxiv.org/p…

Measuring the Two-Dimensional Thermal Structures of Protoplanetary Disks
We present a flexible, annulus-by-annulus method to constrain the 2-D thermal structure of a protoplanetary disk from optically thick spectral line emission. Using synthetic disk models with a known temperature and density structure, we extracted the vertical emission surfaces and brightness temperatures in radial annuli for multiple CO isotopologue transitions and used them to infer the vertical temperature profiles. This approach reliably recovers the injected temperature structure despite no…

Hubble reveals complex multi-scale structure in the edge-on protoplanetary disk IRAS 23077 6707
Kristina Monsch, Joshua B. Lovell, Karl R. Stapelfeldt, Sean M. Andrews, Ammar Bayyari, Alice S. Booth, Adolfo S. Carvalho, John H. Debes, Jeremy J. Drake, Joshua W. J. Earley, Cecilia Garraffo, Garrett K. Keating, Michael L. Sitko, David J. Wilner
https://

Hubble reveals complex multi-scale structure in the edge-on protoplanetary disk IRAS 23077+6707
We present high-resolution (<0.1") Hubble Space Telescope (HST)/Wide Field Camera 3 (WFC3) imaging of the near edge-on (i~80 deg) protoplanetary disk IRAS 23077+6707 ("Dracula's Chivito") obtained across six broadband filters spanning 0.4-1.6 microns. These observations unveil the scattered light from this unusually large disk (~14", or ~4200 au at 300 pc) in remarkable detail, revealing a rich tapestry of substructure, including brightness asymmetries and signatures of dynamical activity. Exte…

The Early Career Workshop of GR-Amaldi 2025
S Al-Shammari, C P L Berry, C E A Chapman-Bird, F T Chowdhury, K Cunningham, M Emma, R Gray, C Hoy, I S Heng, M Korobko, E Maggio, A-K Malz, H Middleton, M Prathaban, I M Romero-Shaw, G Shaifullah, S Singh, J Steinlechner, K Toland, D Williams, M J Williams
https://arxiv.org/abs/2509.03360…

The Early Career Workshop of GR-Amaldi 2025
Gravitational physics and astronomy have developed rapidly over the last decade, driven by new observations and theoretical breakthroughs. As new as the science and technology of this field are, its greatest asset may be the body of early-career researchers actively engaged in driving it forward. With the aim of bringing together this community of enthusiastic scientists from a broad array of disciplines, the organisers of the GR-Amaldi meeting joined with the Gravitational-Wave Early Career Sc…

A Radially Resolved Magnetic Field Threading the Disk of TW Hya
Richard Teague, Boy Lankhaar, Sean M. Andrews, Chunhua Qi, Roger R. Fu, David J. Wilner, John B. Biersteker, Joan R. Najita
https://arxiv.org/abs/2509.09450

A Radially Resolved Magnetic Field Threading the Disk of TW Hya
We present a new approach to detecting and characterizing a magnetic field in protoplanetary disks through the differential broadening of unpolarized molecular emission from CN. To demonstrate this technique, we apply it to new ALMA observations of the full complement of hyperfine components from the $N=1-0$ transition, achieving a spatial and spectral resolution of ${\approx}\,0.5^{\prime\prime}$ and $80~{\rm m\,s^{-1}}$, respectively. By fitting a model that incorporates the velocity structur…