Mapping dust in the giant molecular cloud Orion A

Monthly Notices of the Royal Astronomical Society Oxford University Press (2024) stae268

Authors:

Amery Gration, Stephen Magorrian

Abstract:

The Sun is located close to the Galactic mid-plane, meaning that we observe the Galaxy through significant quantities of dust. Moreover, the vast majority of the Galaxy’s stars also lie in the disc, meaning that dust has an enormous impact on the massive astrometric, photometric and spectroscopic surveys of the Galaxy that are currently underway. To exploit the data from these surveys we require good three-dimensional maps of the Galaxy’s dust. We present a new method for making such maps in which we form the best linear unbiased predictor of the extinction at an arbitrary point based on the extinctions for a set of observed stars. This method allows us to avoid the artificial inhomogeneities (so-called ‘fingers of God’) and resolution limits that are characteristic of many published dust maps. Moreover, it requires minimal assumptions about the statistical properties of the interstellar medium. In fact, we require only a model of the first and second moments of the dust density field. The method is suitable for use with directly measured extinctions, such as those provided by the Rayleigh–Jeans colour excess method, and inferred extinctions, such as those provided by hierarchical Bayesian models like StarHorse. We test our method by mapping dust in the region of the giant molecular cloud Orion A. Our results indicate a foreground dust cloud at a distance of 350 pc, which has been identified in work by another author.

Mapping dust in the giant molecular cloud Orion A

(2024)

Authors:

Amery Gration, John Magorrian

Proton imaging of high-energy-density laboratory plasmas

Reviews of Modern Physics American Physical Society 95:4 (2023) 045007

Authors:

Derek B Schaeffer, Archie FA Bott, Marco Borghesi, Kirk A Flippo, William Fox, Julian Fuchs, Chikang Li, Fredrick H Séguin, Hye-Sook Park, Petros Tzeferacos, Louise Willingale

Abstract:

Proton imaging has become a key diagnostic for measuring electromagnetic fields in high-energy-density (HED) laboratory plasmas. Compared to other techniques for diagnosing fields, proton imaging is a measurement that can simultaneously offer high spatial and temporal resolution and the ability to distinguish between electric and magnetic fields without the protons perturbing the plasma of interest. Consequently, proton imaging has been used in a wide range of HED experiments, from inertial-confinement fusion to laboratory astrophysics. An overview is provided on the state of the art of proton imaging, including a discussion of experimental considerations like proton sources and detectors, the theory of proton-imaging analysis, and a survey of experimental results demonstrating the breadth of applications. Topics at the frontiers of proton-imaging development are also described, along with an outlook on the future of the field.

Black hole binaries in AGN accretion discs – II. Gas effects on black hole satellite scatterings

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 527:4 (2023) 10448-10468

Authors:

Connar Rowan, Henry Whitehead, Tjarda Boekholt, Bence Kocsis, Zoltán Haiman

A Search for IceCube Sub-TeV Neutrinos Correlated with Gravitational-wave Events Detected By LIGO/Virgo

The Astrophysical Journal American Astronomical Society 959:2 (2023) 96

Authors:

R Abbasi, M Ackermann, J Adams, SK Agarwalla, JA Aguilar, M Ahlers, JM Alameddine, NM Amin, K Andeen, G Anton, C Argüelles, Y Ashida, S Athanasiadou, SN Axani, X Bai, A Balagopal V., M Baricevic, SW Barwick, V Basu, R Bay, JJ Beatty, K-H Becker, J Becker Tjus, J Beise, C Bellenghi, S BenZvi, D Berley, E Bernardini, DZ Besson, G Binder, D Bindig, E Blaufuss, S Blot, F Bontempo, JY Book, C Boscolo Meneguolo, S Böser, O Botner, J Böttcher, E Bourbeau, J Braun, B Brinson, J Brostean-Kaiser, RT Burley, RS Busse, D Butterfield, MA Campana, K Carloni, EG Carnie-Bronca, S Chattopadhyay, N Chau, C Chen, Z Chen, D Chirkin, S Choi, BA Clark, L Classen, A Coleman, GH Collin, A Connolly, JM Conrad, P Coppin, P Correa, S Countryman, DF Cowen, P Dave, C De Clercq, JJ DeLaunay, D Delgado López, H Dembinski, K Deoskar, A Desai, P Desiati, KD de Vries, G de Wasseige, T DeYoung, A Diaz, JC Díaz-Vélez, M Dittmer, A Domi, H Dujmovic, MA DuVernois, T Ehrhardt, P Eller, R Engel, H Erpenbeck, J Evans, PA Evenson, KL Fan, K Fang, AR Fazely, A Fedynitch, N Feigl, S Fiedlschuster, C Finley, L Fischer, D Fox, A Franckowiak, E Friedman, A Fritz, P Fürst, TK Gaisser, J Gallagher, E Ganster, A Garcia, L Gerhardt, A Ghadimi, C Glaser, T Glauch, T Glüsenkamp, N Goehlke, JG Gonzalez, S Goswami, D Grant, SJ Gray, S Griffin, S Griswold, C Günther, P Gutjahr, C Haack, A Hallgren, R Halliday, L Halve, F Halzen, H Hamdaoui, M Ha Minh, K Hanson, J Hardin, AA Harnisch, P Hatch, A Haungs, K Helbing, J Hellrung, F Henningsen, L Heuermann, N Heyer, S Hickford, A Hidvegi, C Hill, GC Hill, KD Hoffman, K Hoshina, W Hou, T Huber, K Hultqvist, M Hünnefeld, R Hussain, K Hymon, S In, A Ishihara, M Jacquart, M Jansson, GS Japaridze, K Jayakumar, M Jeong, M Jin, BJP Jones, D Kang, W Kang, X Kang, A Kappes, D Kappesser, L Kardum, T Karg, M Karl, A Karle, U Katz, M Kauer, JL Kelley, A Khatee Zathul, A Kheirandish, J Kiryluk, SR Klein, A Kochocki, R Koirala, H Kolanoski, T Kontrimas, L Köpke, C Kopper, DJ Koskinen, P Koundal, M Kovacevich, M Kowalski, T Kozynets, K Kruiswijk, E Krupczak, A Kumar, E Kun, N Kurahashi, N Lad, C Lagunas Gualda, M Lamoureux, MJ Larson, F Lauber, JP Lazar, JW Lee, K Leonard DeHolton, A Leszczyńska, M Lincetto, QR Liu, M Liubarska, E Lohfink, C Love, CJ Lozano Mariscal, L Lu, F Lucarelli, A Ludwig, W Luszczak, Y Lyu, J Madsen, KBM Mahn, Y Makino, S Mancina, W Marie Sainte, IC Mariş, S Marka, Z Marka, M Marsee, I Martinez-Soler, R Maruyama, F Mayhew, T McElroy, F McNally, JV Mead, K Meagher, S Mechbal, A Medina, M Meier, S Meighen-Berger, Y Merckx, L Merten, J Micallef, T Montaruli, RW Moore, Y Morii, R Morse, M Moulai, T Mukherjee, R Naab, R Nagai, M Nakos, U Naumann, J Necker, M Neumann, H Niederhausen, MU Nisa, A Noell, SC Nowicki, A Obertacke Pollmann, V O’Dell, M Oehler, B Oeyen, A Olivas, R Orsoe, J Osborn, E O’Sullivan, H Pandya, N Park, GK Parker, EN Paudel, L Paul, C Pérez de los Heros, J Peterson, S Philippen, S Pieper, A Pizzuto, M Plum, A Pontén, Y Popovych, M Prado Rodriguez, B Pries, R Procter-Murphy, GT Przybylski, J Rack-Helleis, K Rawlins, Z Rechav, A Rehman, P Reichherzer, G Renzi, E Resconi, S Reusch, W Rhode, M Richman, B Riedel, EJ Roberts, S Robertson, S Rodan, G Roellinghoff, M Rongen, C Rott, T Ruhe, L Ruohan, D Ryckbosch, S Athanasiadou, I Safa, J Saffer, D Salazar-Gallegos, P Sampathkumar, SE Sanchez Herrera, A Sandrock, M Santander, S Sarkar, S Sarkar, J Savelberg, P Savina, M Schaufel, H Schieler, S Schindler, B Schlüter, F Schlüter, T Schmidt, J Schneider, FG Schröder, L Schumacher, G Schwefer, S Sclafani, D Seckel, S Seunarine, A Sharma, S Shefali, N Shimizu, M Silva, B Skrzypek, B Smithers, R Snihur, J Soedingrekso, A Søgaard, D Soldin, G Sommani, C Spannfellner, GM Spiczak, C Spiering, M Stamatikos, T Stanev, T Stezelberger, T Stürwald, T Stuttard, GW Sullivan, I Taboada, S Ter-Antonyan, WG Thompson, J Thwaites, S Tilav, K Tollefson, C Tönnis, S Toscano, D Tosi, A Trettin, CF Tung, R Turcotte, JP Twagirayezu, B Ty, MA Unland Elorrieta, AK Upadhyay, K Upshaw, N Valtonen-Mattila, J Vandenbroucke, N van Eijndhoven, D Vannerom, J van Santen, J Vara, J Veitch-Michaelis, M Venugopal, S Verpoest, D Veske, C Walck, TB Watson, C Weaver, P Weigel, A Weindl, J Weldert, C Wendt, J Werthebach, M Weyrauch, N Whitehorn, CH Wiebusch, N Willey, DR Williams, M Wolf, G Wrede, XW Xu, JP Yanez, E Yildizci, S Yoshida, F Yu, S Yu, T Yuan, Z Zhang, P Zhelnin, The IceCube Collaboration