BLUE
AJ
Alex Ji
@alexji.bsky.social
Near-field Cosmologist and Assistant Professor of Astronomy and Astrophysics at University of Chicago. he/him
358 followers215 following284 posts
AJalexji.bsky.social

This is seriously lifechanging I can now copy files in peace

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AJalexji.bsky.social

This is amazing!!

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AJalexji.bsky.social

This type of model pushes the limits of current data, needing large numbers of precise abundances that will be possible in coming years with PFS/4MOST/ELTs. It’s also extremely powerful, providing unprecedented time resolution in low-mass dwarf galaxies inaccessible with direct observations.

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AJalexji.bsky.social

YST and I realized that you can get really large metallicity gaps due to Type Ia SNe enrichment during long quiescent periods in a galaxy’s star formation history. The SNe keep going off even though you stop forming stars, which can show up in chemical evolution.

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AJalexji.bsky.social

I think there’s very convincing evidence that it’s actually part of a globular cluster stream! (Which was of course once part of a dwarf galaxy :) )

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AJalexji.bsky.social

#dwarfgalaxies2024 6/24 (25%) of the HI dwarfs are in pairs, compared to 5% in optical spectroscopic surveys, which may be biased against dwarfs due to fiber collisions. Preliminarily, ~10-13% of galaxies have a companion (2x higher rate than SDSS).

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AJalexji.bsky.social

#dwarfgalaxies2024 J0139+4328: a HI detection in FAST, 4e6 in stellar mass but 6e7 Msun in gas. What is the Mbary-Mhalo relation (instead of Mstar-Mhalo)?

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AJalexji.bsky.social

#dwarfgalaxies2024 public data release planned 2025!

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AJalexji.bsky.social

#dwarfgalaxies2024 Daniel Piacitelli: studies simulated CGM of dwarf galaxies Ryoungwook Kang: compares numerical/feedback choices in GADGET vs RAMSES for high-z simulations

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AJalexji.bsky.social

#dwarfgalaxies2024 Zhu also ran hydrodynamical simulations showing that the CGM of dwarf galaxies is removed very quickly and leaves CGM tails (that form HI but not stars).

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AJ
Alex Ji
@alexji.bsky.social
Near-field Cosmologist and Assistant Professor of Astronomy and Astrophysics at University of Chicago. he/him
358 followers215 following284 posts