Sign in

Vivian U

@justtheletteru.bsky.social
1.7K followers 454 following 685 posts

Associate Scientist at Caltech/IPAC studying black holes and galaxy mergers with a nerdy sense of humor. Roman Proposal Lead. < 15 minutes of fame from PBS NOVA showcasing JWST science. TEDxMB 2024 speaker. Views are my own. 🌐 vivian-u.github.io

PostsRepliesMedia
Vivian U @justtheletteru.bsky.social · 03/08/2026
A long overdue update to my website features a new News tab to share some recent group milestones, including Raymond's PhD defense, Max's graduation, and Hajar's paper now published in ApJ. Also added updated overviews for our MAUNA and FIRESIDE projects: vivian-u.github.io
030
Vivian U @justtheletteru.bsky.social · 23/06/2026
From undergrad honors thesis to a published paper! 🎉 Massive congrats to my former UCI undergrad Hajar Aziz (current 1st year PhD student at UCR with Gaby) on her first first-author publication, recently accepted and out on arXiv now! arxiv.org/abs/2606.21007
side by side comparison of galaxy imagesmorphological analysis keck NIRES spectra spectral line profiles
161
Vivian U @justtheletteru.bsky.social · 15/04/2026
Roman Cycle 1 Proposal Submission stats!
020
Vivian U @justtheletteru.bsky.social · 27/03/2026
I think I'd like to download my brain.
020
Reposted by Vivian U
Dr. Jessie Christiansen @aussiastronomer.bsky.social · 17/03/2026
Hey #WomenInSTEM, please check out the qualifications and skills and DON'T WRITE YOURSELF OFF if you think you would be a good match. Throw your hat in the ring!
38454
Vivian U @justtheletteru.bsky.social · 16/03/2026
As the Roman Proposal Lead, I think I'm not allowed to ask folks to bet on the final number of submissions for #RomanCycle1 right? 🤔
251
Vivian U @justtheletteru.bsky.social · 16/03/2026
Back in my element - (remote) observing on Palomar tonight. First-time Palomar PI of a 3-night NGPS run; hoping for clear skies 🤞🔭
guider cam and seeingpalomar mountain webcam
071
Reposted by Vivian U
Benne W. Holwerda @benneholwerda.bsky.social · 13/03/2026
Huh a proposal was disqualified for using a different font. That’s a new one. #jwstc5
2123
Vivian U @justtheletteru.bsky.social · 26/02/2026
Our @science.org paper is officially out, and we're featured on the COVER! 🌟🔭🧪 My postdoc Justin Kader led this deep dive into VV 340a, revealing how a precessing jet from a supermassive black hole drives massive gas outflows. It’s been a journey; go Team! 🥹🥂 www.science.org/doi/10.1126/...
science.org
A precessing jet from an active galactic nucleus drives gas outflow from a disk galaxy
To reproduce observed galaxy properties, cosmological simulations require that massive galaxies experience feedback from active galactic nuclei, which regulates star formation within those galaxies. H...
0487
Reposted by Vivian U
Science Magazine @science.org · 14/01/2026
Active galactic nuclei can launch a jet that drives a gas outflow, shaping star formation in their host galaxy. Researchers in a new Science study have observed this phenomenon in the nearby active galaxy VV 340a. scim.ag/3NBetnq
1253
Reposted by Vivian U
W. M. Keck Observatory @keckobservatory.bsky.social · 13/01/2026
An amazing result out of #AAS247 - Astronomers discover the first galaxy-wide wobbling black hole jet in a disk galaxy keckobservatory.org/vv340a/ Congratulations to @justtheletteru.bsky.social, @justinkuder.bsky.social and the whole team for this incredible discovery
053
Reposted by Vivian U
Dr. Jennifer Wade @volcanojw.bsky.social · 13/01/2026
Do you care about the future of the US NSF and science in general? The agency is seeking feedback on the draft Strategic Plan. www.nsf.gov/od/updates/n...
nsf.gov
NSF seeks public input on its Fiscal Year (FY) 2026–2030 NSF Strategic Plan
36858
Reposted by Vivian U
Keith Smith @drkeithsmith.bsky.social · 08/01/2026
Kader, @justtheletteru.bsky.social et al. use multi-wavelength observations to show a precessing jet in an active galaxy is driving a gas outflow. This galactic feedback is removing enough material to affect the star formation rate. ☄️ #extragalactic #AAS247 www.science.org/doi/10.1126/...
1284
Vivian U @justtheletteru.bsky.social · 08/01/2026
📣 Today is our @science.org paper's press conference and online publication date! Print version will be out next month. The embargo on the paper will be lifted for our AAS press conference, scheduled at 10:15am MT. 🔭🧪 Here's the AAS live stream link if you're interested: aas.org/meetings/aas...
1111
Vivian U @justtheletteru.bsky.social · 08/01/2026
We had an observing run on @keckobservatory.bsky.social yesterday. Despite the pessimistic forecast, @marinabianchin.bsky.social pulled through and ended up getting abundant photons from nearby galaxies using #OSIRIS #laserguidestar. This is a gorgeous shot of our laser in action from the camera 🔭
night scene of telescopes atop a snowy mountaintop with orange laser shooting out from one of the telescope into the sky
1174
Vivian U @justtheletteru.bsky.social · 07/01/2026
I spot a cute Roman cardigan! 😝
020
Vivian U @justtheletteru.bsky.social · 05/01/2026
Putting my travel trouble behind me, I’m looking forward to the rest of the week here in Phoenix at #AAS247! One talk done, 4 more to go: [X] Sun pm: HWO SIG [ ] Mon pm: Roman Town Hall [ ] Tue am: Roman proposal splinter [ ] Wed am: oral session [ ] Thurs am: press conference
140
Vivian U @justtheletteru.bsky.social · 10/12/2025
📢 PSA: Roman Cycle 1 Call for Proposal is now open!! 🚨 I'm so excited for the Roman launch currently planned for September 2026!! 🔭🧪
1132
Vivian U @justtheletteru.bsky.social · 07/12/2025
Still getting used to the (very) round corners of Tahoe windows...
000
Vivian U @justtheletteru.bsky.social · 30/11/2025
I listened to the uber driver and switched seat to the right side window of the plane when I was leaving Mexico City. Then I got this incredible shot of not just the sunrise but the tip of what I think might be the Great Pyramid of Cholula - happy to be corrected though. Love this photo regardless.
Photo taken in air of the sun rise, city light, and a mountain top in the distance
0393
Vivian U @justtheletteru.bsky.social · 06/11/2025
There's been so much going on but I'd like to take a quick pause and share the happy news that postdoc Justin Kader's paper on an exemplary precessing jet-driven galactic-scale outflow has just been accepted in Science!! Can't wait to share the results soon 🥹 1/3
360
Reposted by Vivian U
Roman for Scientists @nancyromansci.bsky.social · 21/10/2025
BIG NEWS: The Ready, Set, Roman! Training Series is here! Get hands-on with tools, data, & workflows to prepare for the Roman mission. 📅 Kicks off Nov 04, 1 PM EDT 💡 Title: “Tools for Exploring Roman’s Core Community Surveys” 🔗 bit.ly/3KNDElA #ReadySetRoman
052
Reposted by Vivian U
Dr. Jessie Christiansen @aussiastronomer.bsky.social · 13/10/2025
Less than a year later, once again feeling anxious for my remaining fabulous JPL colleagues. 😬
6524
Vivian U @justtheletteru.bsky.social · 13/10/2025
I know there are currently much bigger problems in the world out there, but also: deadlines + sick kids = 😵‍💫🤯😭
070
Vivian U @justtheletteru.bsky.social · 08/10/2025
Momentarily confused by an email with the subject line "Do you have your CGM ready?" and was thinking that it's a message advertising an astro conference only to find that it came from a previous medical center...
130
Vivian U @justtheletteru.bsky.social · 22/09/2025
🎉 A huge congrats to Tufts grad Edgar Vidal on the first (of hopefully several) paper from our FIRESIDE (Far-InfraRed Extragalactic Survey and Instrument Design Exploration) project! It has been submitted to ApJ and is out on arXiv today! 🔭🧪 #JWST #MIRI #obscuredAGN #FIR 1/ arxiv.org/abs/2509.15331
arxiv.org
Modeling the JWST MIRI Counts, Insights Into the Source Properties and Role of Dust-Obscured AGN
Understanding the co-evolution of galaxies and active galactic nuclei (AGN) requires accurate modeling of dust-obscured systems. Recent surveys using the Mid Infrared Instrument (MIRI) onboard the Jam...
171
Reposted by Vivian U
Larry R. Nittler 🚀🎹🌖☄️ @larrynittler.bsky.social · 10/09/2025
thoughts and prayers
041
Reposted by Vivian U
American Astronomical Society (AAS) @aas.org · 10/09/2025
AAS Social Media Task Force The AAS is seeking members for a social media task force to strategically increase the Society's social media presence, including communicating the value of astronomy & science funding to the broader public and promoting advocacy actions. docs.google.com/forms/d/e/1F... 🔭
docs.google.com
Apply to Join the AAS Social Media Task Force
The AAS is seeking members for a social media task force, to strategically increase the social media presence of the Society, including communicating the value of astronomy and science funding to the ...
0118
Vivian U @justtheletteru.bsky.social · 10/09/2025
TIL: dear fellow astronomers, if you're ever looking for AAS info online, be very specific. A generic search might just lead you to a different American society—one with a cover photo and icon that can send chills down your spine... unless you happen to like crawlers 🥶🕷️
071
Vivian U @justtheletteru.bsky.social · 05/09/2025
This was a great experience giving back to the community whose taxpayer dollars help funded my research - and learning that they deemed it worthy 🥹 @caltechipac.bsky.social
140
Vivian U @justtheletteru.bsky.social · 21/08/2025
Paper day 🎉🔭 Congrats to my student Raymond Remigio on acceptance of his 1st first-author paper! We mapped [O III] gas in nearby Sy 1s with @keckobservatory.bsky.social: gas kinematics align w/ stars at large scales, but many show twists/outflows near nuclei + large NLRs arxiv.org/abs/2508.14304
panel of galaxies and their kinematics mapspanel of galaxies and their kinematics maps4 panels of BH mass - sigma relationsNLR size vs [OIII] luminosity plot
1110
Vivian U @justtheletteru.bsky.social · 16/08/2025
Safe travels @marinabianchin.bsky.social, all the best with everything. Thanks for the past 3 years, you’ll be missed!
Two smiling people holding a mug at a dinner settingThree people sitting outside with coffee
010
Vivian U @justtheletteru.bsky.social · 13/08/2025
Relics gifted to me to help me on my job (back when #Spitzer was called #SIRTF) #iykyk 🔭
Three printed reports related to the Space InfraRed Telescope Facility
0140
Vivian U @justtheletteru.bsky.social · 08/08/2025
Missing JustinK & Yiqing, but this may be the last time our group gathers for lunch before Hajar leaves for PhD, @marinabianchin.bsky.social leaves for next postdoc, and JustinP leaves Cal-bridge summer program. With JustinK's departure in a month, this is one of those end-of-an-era moments for me 🥺
Smiling people around a dining table with empty cups and plates
070
Reposted by Vivian U
Dr. Tessa Fisher @tessafisher.bsky.social · 06/08/2025
Nice essay about a project near and dear to my heart!
bigthink.com
NASA's Habitable Worlds Observatory: the future (or end) of NASA science
At the end of July, hundreds of scientists convened to plan NASA's upcoming astrophysics flagship mission. Will the US allow it to happen?
0187
Reposted by Vivian U
janiceleeastro @janiceleeastro.bsky.social · 01/08/2025
what a week for our future✨ #HWO25 🧵coming soon🔭🧪☄️ @mmacgreg.bsky.social @hbhammel.bsky.social @bmacastro.bsky.social @dawngelino.bsky.social @aussiastronomer.bsky.social @stsci.edu @aura-astronomy.bsky.social @justtheletteru.bsky.social @vividreams.bsky.social @leefeinberg.bsky.social +500 others
44710
Vivian U @justtheletteru.bsky.social · 31/07/2025
There. I've now talked about IMBHs. (Photo courtesy of Chris Packam)
Presenter on theatre stage with large screen in the backgroundPresenter showing "you are here" Milky Way picture
151
Reposted by Vivian U
Dr. Jessie Christiansen @aussiastronomer.bsky.social · 28/07/2025
Like Vivian, I’m excited to represent the ExoPAG community on this new Science Interest Group! And very happy to work with this great team. ❤️‍🔥
0182
Reposted by Vivian U
L. C. Mayorga @mayorgalc.bsky.social · 28/07/2025
It was also announced that I am one of the co-chairs for the new HWO crossPAG SIG! #HWO25
182
Reposted by Vivian U
Dr. Jessie Christiansen @aussiastronomer.bsky.social · 29/07/2025
Folks should be following @drjovian.bsky.social for a play by play of the #HWO25 conference this week!
064
Reposted by Vivian U
Becka Phillipson @beckastrosaurus.bsky.social · 18/07/2025
I am hiring a postdoc to work with me on time domain astrophysics, primarily in prep for Rubin LSST. Job ad here: lnkd.in/esamU7gy Please share! :) Start date is flexible & can be as early as this Fall. There have been Q's about the application portal, so do not hesitate to email me for help!
lnkd.in
LinkedIn
This link will take you to a page that’s not on LinkedIn
111
Vivian U @justtheletteru.bsky.social · 30/07/2025
Not one but TWO papers from my group are published on ApJ within this past week! 🎉🎉 Tianmu Gao led the work on compiling nuclear SEDs of (U)LIRGs; Justin Kader studied cluster winds as engines of feedback in starburst galaxy 🔭 iopscience.iop.org/article/10.3... iopscience.iop.org/article/10.3...
four-panel plots showing spectral energy distributionsmulti-panel plots, see paper for detail
1110
Vivian U @justtheletteru.bsky.social · 28/07/2025
Happy to share that I've been selected to join the leadership team of the new Habitable Worlds Observatory Science Interest Group, representing the Cosmic Origins community in particular. I look forward to working with my awesome co-chairs on furthering this inspiring mission! #HWO25
Slide with QR code, pictures and names of people, info about joining a group
2233
Reposted by Vivian U
Jennifer Ouellette @jenlucpiquant.bsky.social · 22/07/2025
Nearly 3,000 people are leaving NASA, and this director is one of them arstechnica.com/space/2025/0...
arstechnica.com
Nearly 3,000 people are leaving NASA, and this director is one of them
Makenzie Lystrup’s departure from Goddard comes soon after the resignation of the director of JPL.
412363
Vivian U @justtheletteru.bsky.social · 18/07/2025
Maybe the silver lining is that I'll no longer be called an astrologer? #astronomer #Coldplay
030
Vivian U @justtheletteru.bsky.social · 18/07/2025
If you see this, post a video game that transports you to your childhood
media.tenor.com
a screenshot of a video game with bubbles and a score of 57
Alt: a screenshot of a video game with bubbles and a score of 2730
250
Reposted by Vivian U
Aspen Center for Physics @aspenphysics.bsky.social · 18/07/2025
We’re #Hiring! Aspen Center for Physics is looking for a Development Officer & Donor Liaison to support a major capital campaign + donor engagement at a world-renowned science nonprofit. Based in Aspen, CO. 💵 $70–95K 🔗 aspenphys.org/home/staff/ #Fundraising #Science #Aspen #DonorEngagement #Jobs
022
Reposted by Vivian U
Bruce Macintosh @bmacastro.bsky.social · 18/07/2025
Senate CJS bill is passed out of committee, with strong support for NASA and NSF (basically flat budgets) and strongly supportive language for many facilities. www.appropriations.senate.gov/imo/media/do...
appropriations.senate.gov
28821
Reposted by Vivian U
NPR @npr.org · 18/07/2025
Congress has decided to claw back previously approved funding for public media. This decision hurts people in communities across the country, but it has only strengthened our resolve to keep Americans informed and connected. (1/2)
32458181914