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Yao-Yuan Mao
@yymao.bsky.social
茅耀元. Astrophysicist at U of Utah studying dark matter & galaxies with astronomical surveys + simulations. Programmer. they/he. yymao.github.io 🏳️‍🌈 (views are mine)
81 followers41 following7 posts
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YMyymao.bsky.social

The SAGA saga: Putting the Milky Way’s ‘peculiarities’ into context
The SAGA saga: Putting the Milky Way’s ‘peculiarities’ into context

A trio of new studies suggests the Milky Way has a unique configuration of satellite galaxies surrounding it.

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YMyymao.bsky.social

How special is the Milky Way Galaxy?   | College of Science
How special is the Milky Way Galaxy?   | College of Science

How special is the Milky Way Galaxy? September 25, 2024 Above: A mosaic of the satellite galaxies across the Milky Way-like systems that the SAGA team has surveyed. The mages are sorted by their lumin...

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YMyymao.bsky.social

Lovely! Hope it goes well!

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YMyymao.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.
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YMyymao.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)
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YMyymao.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.
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YMyymao.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.
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Reposted by Yao-Yuan Mao
JFjwuphysics.bsky.social

This is a really rich analysis and data set, made possible by Elise Darragh-Ford, @yymao.bsky.social@jegpeek.bsky.social, and many others! You can now access some of the data from the the DESI Early Data Release. Stay tuned for even more!

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YM
Yao-Yuan Mao
@yymao.bsky.social
茅耀元. Astrophysicist at U of Utah studying dark matter & galaxies with astronomical surveys + simulations. Programmer. they/he. yymao.github.io 🏳️‍🌈 (views are mine)
81 followers41 following7 posts
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