The expansion rate of the universe is one of the biggest questions that the JWST set out to answer. In a preprint posted Monday evening, three different data sets from the Webb telescope fail to nail down the answer. For now, the Hubble tension lives on. www.quantamagazine.org/the-webb-tel...
Measuring extragalactic distances is really hard. I've spent the past five years testing the JAGB method for systematics and optimizing how to apply it. There's still more work to be done-- so we need more JWST data!
You can find details of our SNe Ia calibrations in Freedman et al (2024), which will appear on the arXiv next week.
This local measurement agrees to within 1-sigma with the CMB measurements of H0.
It's been a long time coming... I'm super excited to announce the CCHP's local measurement of the Hubble constant via the JAGB method, a standard candle I have been developing during graduate school. We find H0 = 67.96 +/- 1.85 km/s/Mpc. arxiv.org/abs/2408.03474
The J-region asymptotic giant branch (JAGB) method is a new standard candle based on the constant luminosities of carbon-rich asymptotic giant branch stars in the J band. The JAGB method is...
Two Small Magellanic Clouds Are Better than One @astrobites.bsky.social@abigaillee.bsky.socialaasnova.org/2024/01/30/t... 🔭
Astrobites reports on the recent exciting discovery that the Small Magellanic Cloud is actually composed of two distinct star-forming systems.
Say hello to Abby (@abigaillee.bsky.socialwww.instagram.com/p/C2SN2_iu8Z...
astrobites on January 19, 2024: "Say hello to Abby! Our newest feature for ✨ Meet the Authors ✨ Current Affiliation: UChicago..."
From Abby Lee: Today's bite explores how we can look at the stellar haloes of galaxies to reconstruct their past merger and accretion events. 🔭🧪 astrobites.org/2023/11/21/m...
Today’s bite explores how we can look at the stellar haloes of galaxies to reconstruct their past merger and accretion events.
apply to write for astrobites !! truly only positive words for my time with this collab !!
Apply to write for us! Are you enthusiastic about science communication? Interested in developing your writing skills? Excited about joining a collaboration of over 100 astronomy grad students from around the world? We look forward to working with you ☺️ 🔭 astrobites.org/2023/10/21/a...
Love astronomy, astrophysics, and science communication? Come join the Astrobites team! Applications due November 17th.