Around one week left to register for Galactic Frontiers II -- looking forward to discussing low-mass galaxies with a great group this June!

#astro #extragalactic

Saw this cool work on the arxiv today from Blake Keith & @ferahm.bsky.social!

A demonstration of how the 3D shapes of stars trace that of DM in cosmologically simulated dwarfs, including a comparison to observed stellar shapes from my previous work.

arxiv.org/abs/2501.16317

🔭 #extragalactic

Mass-size relation of LG/LV/LF dwarfs

Was psyched that Andrew Pace's Local Volume Database of dwarfs & star clusters was on ArXiV the other day! The push for community-facing collation is great to see in the #extragalactic space. (🔭)

📝 arxiv.org/abs/2411.07424
💻 github.com/apace7/local...

On ApJ now so technically an #extragalactic #astro #paperday!

We deconvolve survey selection from evolution of the low-mass SFS at z<0.2. This constrains models of dwarf assembly, and signals how care is needed to use low-z galaxies to contextualize the LV/LG.

ui.adsabs.harvard.edu/abs/2024ApJ....

For the dwarf galaxy enthusiasts in #astro & #extragalactic! Excited to share the conference we'll be hosting June 2025:

🔎 Galactic Frontiers II: Dwarfs in the LV & Beyond
🔎 6/23-6/25 at Dartmouth

Note that the conference is NOT region-specific!
Register at: sites.dartmouth.edu/galactic-fro...

I am an astronomer, focusing on extragalactic astrophysics and galaxy evolution (postdoc at Yale).

yes

@bot.astronomy.blue signup

And in the second Merian 🦋 paper out today:

Princeton student Abby Mintz develops methods to turn medium-band imaging into Hα maps, and shows that low-mass starbursts tend to be more compact than their more massive counterparts.

Read the paper here! arxiv.org/abs/2410.01886

So excited to share the first two science papers of the Merian medium-band survey! 🦋

We image Hα and [OIII] to measure weak lensing and resolved star formation in low-z dwarfs over ~750 deg^2.

Check out the survey paper led by Shany Danieli at: arxiv.org/abs/2410.01884 !

The SAGA Survey. V. Modeling Satellite Systems around Milky... Environment plays a critical role in shaping the assembly of low-mass galaxies. Here, we use the UniverseMachine (UM) galaxy-halo connection framework and the Data Release 3 of the Satellites...

It's DR3 Paper Day for the SAGA Survey!! 🎉
🌟Mao+ gives a satellite census of 101 MW-like hosts arxiv.org/abs/2404.14498
🌟Geha+ surveys the link btwn environment & star formation arxiv.org/abs/2404.14499
🌟 Wang+ models dwarf quenching with the UniverseMachine arxiv.org/abs/2404.14500

Excited to see this very nice research highlight of our recent quenched field dwarf paper by @aasnova.bsky.social !

Paper day! arxiv.org/abs/2401.16469
We use the background galaxies in the SAGA survey to infer the efficiency of winds driven by star formation in low-mass galaxies. We find a mass-loading factor of ~1: consistent with direct observations, but smaller than what some sims predict at these masses.

A late ArXiV post since I wasn’t active here — we present a field dwarf pair where one is starbursting and the other is *quenched*! VLA data reveal that the non-SF dwarf's HI is in large tidal tails, showing that field dwarfs can temporarily quench even as non-satellites. arxiv.org/abs/2311.09280