Andrew Wetzel

Professor of Physics & Astronomy at the University of California, Davis. Theoretical/computational astrophysics and cosmology.

[Isaiah Santistevan @IsaiahSantiste2]

Today is paper day! We compared the orbits of satellites of MW-mass galaxies in the FIRE simulations to a static potential model to better understand the uncertainties in the latter.

https://t.co/nmf9HGiu2P

[Andrew Wetzel @AndrewWetzel]

Also, happy that Mike Blanton's introduction at #biogalaxies features a figure from PhD student Fiona McCluskey's first paper, which is out today! https://t.co/q6CcN5E5D3

[Andrew Wetzel @AndrewWetzel]

6) Young stars in our FIRE simulations are kinematically hotter than the Milky Way but broadly agree with M31 and M33.

[Andrew Wetzel @AndrewWetzel]

Happy for the first paper from PhD student Fiona McCluskey: "Disk settling and dynamical heating: histories of Milky Way-mass stellar disks across cosmic time in the FIRE simulations", https://t.co/q6CcN5E5D3, https://t.co/qcFzdYMWFn, @sloebman, @jorgito__moreno. Key takeaways:

[Andrew Wetzel @AndrewWetzel]

5) Interestingly, the lookback time that a disk began to settle correlates with its dynamical state today: earlier-settling galaxies currently form colder disks.

[Andrew Wetzel @AndrewWetzel]

6) Megan also provides analytic fits to our key results, for anyone to use as inputs to (semi)analytic models for the counts/rates of low-mass subhalos

[Andrew Wetzel @AndrewWetzel]

Happy to share the first paper form PhD student Megan Bary: "The dark side of FIRE: predicting the population of dark matter subhaloes around Milky Way-mass galaxies", https://t.co/jRbCc1GZ5H (with @astro_jenna). Some key takeaways:

[Andrew Wetzel @AndrewWetzel]

5) One of the most interesting predictions is that the presence of the LMC satellite galaxy around the Milky Way today likely boosts the total subhalo population around the Milky Way by ~2x at distances <~ 50 kpc

[Jeremy Bailin @AstroBailin]

Paper day! @ua_phay Grad student Anna Parul's first-author paper on how bursty star formation in Milky Way-mass galaxies leaves an imprint on the alpha element abundances of stars. https://t.co/f37NG6ndQg @astrofyz #PaperDay 1/5

[Andrew Wetzel @AndrewWetzel]

Another insightful paper from @astro_jenna, this time on understanding the process of ram-pressure stripping that removes gas from satellite galaxies and quenches their star formation.

[Jenna Samuel @astro_jenna]

New paper on the arxiv today! We looked at ram pressure on simulated low-mass galaxies throughout the Local Group. https://t.co/tCvOhPIsB3