An extended halo around an ancient dwarf galaxy
Anirudh Chiti led a paper detecting the very outskirts of the dwarf galaxy Tucana II. This is the furthest out that stars have been detected around a tiny galaxy. The paper is published in Nature Astronomy. A collection of press from Carnegie, MIT, The Guardian.
A primitive stellar stream
The S5 survey has discovered the most metal-poor known globular cluster in the Milky Way. It is being actively tidally shredded by the Milky Way. A collection of news articles from Carnegie, VICE, Sydney Morning Herald, Sky and Telescope, Chicago Tribune (in Spanish), and CNET. The Galactic Times produced a podcast about the Phoenix stream.
A hyperfast runaway star
The S5 survey serendipitously found the first known star to be kicked out from our galaxy’s central black hole. Here are a collection of news articles from Carnegie, the New York Times, CBS News, and Space Australia.
The First Stars, Like, Ever
In 2020 I gave an online talk at Astronomy on Tap with Dr. Brittany Kamai. You can watch it on YouTube!
Glimpses of the Cosmic Dawn
In 2019 I gave a talk at the Huntington Libraries about “Glimpses of the Cosmic Dawn”, which you can watch here:
Searching for the First Stars
In 2017 I gave a talk titled “Searching for the First Stars” at the Carnegie Observatories Open House. You can watch it on YouTube!
The R-Process Galaxy Reticulum II
My favorite galaxy is Reticulum II.
The nine brightest stars in the r-process galaxy Reticulum II are circled.
Three of these stars are highlighted, showing their large barium content.