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Chemistry and the X CO conversion factor Munan Gong Max Planck - PowerPoint PPT Presentation

Jan 19, 2024 •424 likes •531 views

Chemistry and the X CO conversion factor Munan Gong Max Planck Institute for Extraterrestrial Physics (MPE) Athena++ workshop, UNLV, March 2019 With Eve Ostriker and Chang-Goo Kim (Princeton) Motivation chemistry CO (2-1) line luminosities,

  1. Chemistry and the X CO conversion factor Munan Gong Max Planck Institute for Extraterrestrial Physics (MPE) Athena++ workshop, UNLV, March 2019 With Eve Ostriker and Chang-Goo Kim (Princeton)

  2. Motivation chemistry CO (2-1) line luminosities, from Sun+ (2018), Column densities, from Kim+Ostriker (2017), PHANGS project TIGRESS simulations

  3. Chemical Network • What network? • PDR code: ~50 species, ~500 reactions the “right answer” • Our network: ~20 species, ~50 reactions • Nelson+Langer (1999) network Sternberg+Dalgarno 1995 Gong, Ostriker and Wolfire (2017), ApJ, 843:38 A Simple and Accurate Network for Hydrogen and Carbon Chemistry in the ISM

  4. Simulating the Solar Neighbourhood snapshots in simulation n H T P V z B chemistry + radiation transfer mock observation 1 kpc Kim+Ostriker (2017), movie by Chang-Goo Kim TIGRESS simulations: 3-phase ISM, self-consistent star formation with supernova feedback.

  5. Caution: the Resolution Effect Increasing resolution Gong, Ostriker and Kim (2018), ApJ, 858:16 The X CO Conversion Factor from Galactic Multiphase ISM Simulations

  6. The X CO Conversion Factor mock observation real observation of Orion Gong, Ostriker and Kim (2018), ApJ, 858:16 The X CO Conversion Factor from Galactic Multiphase ISM Simulations

  7. Cooling Function • We can also do chemistry… so that we don’t have to do chemistry?! Z=0.1 With Jeong-Gyu Kim, Eve Ostriker, Chang-Goo Kim, in prep

  8. Beyond Our Neighbourhood With Chang-Goo Kim, Eve Ostriker, Jeong-Gyu Kim, in prep

  9. I want chemistry too! I want chemistry too! Protoplanetary disks (Lile Wang) Development Branch: promised her thesis Athena++ committee that time- I have just heard that lots of dependent chemistry people have done chemistry would be ready 2 years with Athena++… ago (Munan Gong) Planetary atmosphere (Cheng Li) But none of them is in the public release!@#$%

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