The Fate of Cold Clouds in Galaxy Outflows

• Applicant: Professor Marcus Brüggen, Ph.D.
• Subject Area: Astrophysics and Astronomy
• Term: from 2017 to 2022
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 343993325

• Final Report Year: 2022

Final Report Abstract

This proposal funded the postdoctoral position of Dr. Wladimir Banda-Barragan at the University of Hamburg. With Dr. Banda-Barragan we could employ an outstanding postdoc who is an expert in hydrodynamical simulations of astrophysical flows. He worked successfully on simulations of multi-phase flows and has made a lasting impact on the entire field, all this in spite of the difficulties imposed by the COVID pandemic. As we detail in the report below, his work went far beyond the goals that we had initially designated for project. In particular we investigated the survival of non-uniform clouds, the interaction between shock waves and a large sets of clouds, and cloud-cloud collisions. At the end of the project, Dr. Banda-Barragan moved to a permanent faculty position in Ecuador. In this work our main collaborators were Prof. C. Federrath (Australian National University) and Prof. E. Scannapieco (Arizona State University).

Publications

• On the dynamics and survival of fractal clouds in galactic winds. Monthly Notices of the Royal Astronomical Society, 486(4), 4526-4544.
  Banda-Barragán, W. E.; Zertuche, F. J.; Federrath, C.; García, Del Valle J.; Brüggen, M. & Wagner, A. Y.
  
• A cloud-cloud collision in Sgr B2? 3D simulations meet SiO observations. Proceedings of the International Astronomical Union, 16(S362), 250-257.
  Banda-Barragán, Wladimir E.; Armijos-Abendaño, Jairo & Dénes, Helga
  
• Morphology of radio relics – I. What causes the substructure of synchrotron emission?. Monthly Notices of the Royal Astronomical Society, 500(1), 795-816.
  Domínguez-Fernández, P.; Brüggen, M.; Vazza, F.; Banda-Barragán, W. E.; Rajpurohit, K.; Mignone, A.; Mukherjee, D. & Vaidya, B.
  
• Shock–multicloud interactions in galactic outflows – I. Cloud layers with lognormal density distributions. Monthly Notices of the Royal Astronomical Society, 499(2), 2173-2195.
  Banda-Barragán, W. E.; Brüggen, M.; Federrath, C.; Wagner, A. Y.; Scannapieco, E. & Cottle, J.
  
• Structure and kinematics of shocked gas in Sgr B2: further evidence of a cloud–cloud collision from SiO emission maps. Monthly Notices of the Royal Astronomical Society, 499(4), 4918-4939.
  Armijos-Abendaño, J.; Banda-Barragán, W. E.; Martín-Pintado, J.; Dénes, H.; Federrath, C. & Requena-Torres, M. A.
  
• The Launching of Cold Clouds by Galaxy Outflows. III. The Influence of Magnetic Fields. The Astrophysical Journal, 892(1), 59.
  Cottle, J.’Neil; Scannapieco, Evan; Brüggen, Marcus; Banda-Barragán, Wladimir & Federrath, Christoph
  
• Morphology of radio relics – II. Properties of polarized emission. Monthly Notices of the Royal Astronomical Society, 507(2), 2714-2734.
  Domínguez-Fernández, P.; Brüggen, M.; Vazza, F.; Hoeft, M.; Banda-Barragán, W. E.; Rajpurohit, K.; Wittor, D.; Mignone, A.; Mukherjee, D. & Vaidya, B.
  
• Shock–multicloud interactions in galactic outflows – II. Radiative fractal clouds and cold gas thermodynamics. Monthly Notices of the Royal Astronomical Society, 506(4), 5658-5680.
  Banda-Barragán, W. E.; Brüggen, M.; Heesen, V.; Scannapieco, E.; Cottle, J.; Federrath, C. & Wagner, A. Y.