Yao-Yuan Mao
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yymao.bsky.social
Yao-Yuan Mao
@yymao.bsky.social
2K followers 94 following 11 posts
Astrophysicist at U of Utah studying small galaxies and dark matter using astronomical surveys and simulations || teacher || programmer || 茅耀元 || they/he || 🏳️‍🌈 || http://yymao.github.io || https://astro-outlist.github.io
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yymao.bsky.social
I was so lucky to be looped into SAGA Survey when I was still a second-year grad student. This amazing project is such an important part of my professional journey. It is so wonderful to work with this group of people. ❤️🧡💛💚💙💜

Now go check out these beautiful satellites in our papers and e-posters!!
Images of 378 SAGA satellites, sorted by r-band absolute magnitude within each of the 101 complete systems that have satellites. Four of the 101 systems have the same level of survey completeness but do not have any confirmed satellites. The images of host galaxies are not included. The colors of the frames are assigned by the number of satellites. Images are taken from DESI Imaging DR9 (Dey et al. 2019). The width and height of each image correspond to 40 arcsec.
April 24, 2024 at 9:16 PM
yymao.bsky.social
It is ONLY through the team effort that the SAGA Survey reaches this major milestone: the fearless Marla Geha and Risa Wechsler, and an amazing team: Nitya, Erik, Ben, Ethan, Richie, Yasmeen, Erin, Mia, and John!
Pictures of the SAGA team members: Marla Geha (Yale), Yao-Yuan Mao (U Utah), Risa Wechsler (Stanford), Nitya Kallivayalil (U Virginia), Erik Tollerud (STScI), Ben Weiner (U Arizona), Ethan Nadler (Carnegie/USC), Yunchong (Richie) Wang (Stanford), Yasmeen Asali (Yale), Erin Kado-Fong (Yale), Mia de los Reyes (Amherst College), John F. Wu (Stsci)
April 24, 2024 at 9:13 PM
yymao.bsky.social
Three SAGA Survey DR3 papers on arXiv:

3️⃣ 2404.14498 - survey overview & main results
4️⃣ 2404.14499 - satellites' star-forming properties
5️⃣ 2404.14500 - comparison with theoretical models

We also made "e-posters" that summarize the major points! Find the links on our website.
A screenshot of the SAGA Survey website that highlights the three SAGA DR3 papers: PAPER III: 101 SATELLITE SYSTEMS. SAGA DR3 includes 378 satellites identified across 101 MW-mass systems. The number of confirmed satellites per system ranges from 0 to 13, in the stellar mass range 10^6−10 solar masses. PAPER IV: STAR-FORMING PROPERTIES. SAGA satellites that have lower masses or are closer to the host galaxy are more likely to be quenched. This data enable use to study the environmental processes that suppress or quench star formation. PAPER V: COMPARING WITH MODELS. Using SAGA DR3 data to constrain an updated version of the Universe Machine model, we can directly test whether environmental quenching can be modeled by halo assembly histories.
April 24, 2024 at 9:07 PM
yymao.bsky.social
It's very fitting that my first post here is about this important milestone for the SAGA Survey and for myself personally!

The SAGA Survey characterizes satellite galaxy systems around Milky Way-mass galaxies, and we just posted our major results from our Data Release 3! Check arXiv & our website!
A screenshot of the homepage of SAGA Survey Data Release 3 website, with background filled with SAGA satellite images.
April 24, 2024 at 9:04 PM