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MPA - Multiphase Gas

The Universe is filled with multiphase gas, that is, different gas with extremely different temperatures is often found co-spatially within and around galaxies. Understanding its dynamics and observables is at the heart of our understanding how material flows in and out of galaxies to eventually form stars, planets and everything we see around us. Famous examples of multiphase gas are the interstellar medium (ISM), circumgalactic medium (CGM), galactic winds and the intracluster medium (ICM).
In the "Multiphase Gas" research group, we use theoretical and computational methods to understand these systems and how we can observe them. In particularly, active research (in which we offer PhD projects) is being done in trying to answer:

  • how does turbulence affect the evolution of multiphase gas and vice-versa?
  • how do the different phases form, grow, or get destroyed?
  • in what way does radiation propagate through a multiphase medium?
  • how are the physical properties of multiphase gas imprinted on observable data?
  • in which ways do multiphase gas flows affect galaxy evolution?

In the group, we develop new theories and write our own codes / numerical tools which we typically run on supercomputers. For more information visit our

webpage or reach out to our group members.

 

Overview of some of the research being conducted in MPA's Multiphase Gas Group. From top left: (1) Lyman-alpha spectra emergent from a clumpy, multiphase medium (adapted from Gronke et al. 2016, 2017), (2) path of Lyman alpha photon through a "very clumpy" (fc >> fccrit) medium (from Gronke et al. 2016), (3) observed Lyman alpha halo (from Arrigoni Battaia et al. 2019) and HI of a simulated galaxy (van de Voort et al. 2019), (4) HI fraction carved through the propagation of ionizing photons (from Kakiichi & Gronke 2021), (5) high resolution simulation of a turbulent mixing layer with the colors indicating temperature (from Tan et al. 2021), (6) cold gas being entrained in a hot wind (from Gronke & Oh 2018), (7) a cloud "shattering" due to rapid cooling (from Gronke & Oh 2020), (background) evolution of the ionized regions during the Epoch of Reionization (Ocvirk et al. 2020).