Texas Astronomy

@texasastronomy.bsky.social

The Department of Astronomy at The University of Texas at Austin astronomy.utexas.edu

A new paper that I'm excited to be a part of: Little Red Dots (LRDs) at high redshift have very specific chemical signatures of high-temperature hydrogen burning generally only seen in nearby globular clusters (GCs). This may indicate GCs and LRDs are connected and both hosted supermassive stars! 🧪

nucleosynthesis in core helium burning (~200 million K) and hot hydrogen core burning (~70-80 MK)

UT Austin grad student Junehyoung Jeon has a really nice paper out today on growth requirements for supermassive black holes and little red dots in the early Universe. He shows the only way to get so massive so early is by feeding the black holes as efficiently as possible. Intriguing! 🧪

Early Supermassive Black Holes and Little Red Dots Require Free-Fall Growth

Supermassive black holes/active galactic nuclei (SMBHs/AGN), forming only a few hundred million years after the Big Bang as observed with the James Webb Space Telescope (JWST), challenge theoretical u...

arxiv.org

Over the summer, we were delighted to host 8 visiting students as part of our 2026 NSF REU program! They will present results from their exciting research projects at the winter American Astronomical Society meeting in Salt Lake City. 🔭⭐

Photo of students and mentors outside the Physics, Math, and Astronomy building on the UT Austin campus

Today's eclipse isn't visible in Texas, but you can tune in to a variety of live steams and relive what we saw in Austin in 2024!

European Space Agency@esa.int · 2mo ago

🔴We're LIVE from the Observatorio Astrofísico de Javalambre in Spain - join us as we show the total solar eclipse as it happens! Watch here 👉 www.youtube.com/live/DRDx2xD... or watch.esa.int/Two/ 🚨⚠️ Only use certified eclipse glasses (ISO 12312-2) to look at the Sun! #EuropeanSolarEclipse

How long will natural darkness last? NYTimes article highlights major concerns for the dark skies of the Big Bend Region, as plans to build a border wall bring bright light to untouched land. Learn how this could affect science at UT Austin's McDonald Observatory www.nytimes.com/2026/07/14/s...

Dark Sky Defenders Raise Alarm Along the Border of West Texas (Gift Article)

Residents fear that the Trump administration’s plans to build a border wall will threaten the region’s spectacular starry skies.

nytimes.com

Check out the nice video that @texasastronomy.bsky.social postdoc Jenna Samuel made to explain her work on galaxy formation in the early cosmos! 🧪

NSF-Simons AI Institute for Cosmic Origins (CosmicAI)@nsfsimonscosmicai.bsky.social · 4mo ago

Using cutting-edge simulations, Dr. Jenna Samuel, Prof. @mbkplus.bsky.social, & Asst. Prof Julian Munoz investigated a major puzzle revealed by the JWST: why do the earliest galaxies appear brighter, more massive, & clumpier than expected? cosmicai.org/news/researc... www.youtube.com/watch?v=h5dI...