Héctor Gil Marín
@cosmonautico.bsky.social
Associate Professor at the Institute de Ciències del Cosmos at UniBarcelona studying the large scale structure of the Universe 🌌. BOSS, eBOSS and now in DESI 🏜🔭. Sometimes I ride my bike(s)🚵♂️.
📣 Paper Day 📣 arxiv.org/pdf/2605.24089 We study a phenomenological dark-radiation framework with free-streaming + fluid-like components, and test it against CMB, BAO, and calibrated SNe data. Main result: early extra radiation can reduce the sound horizon and alleviate the Hubble tension.
🔵 #News | The #DESI instrument has completed its planned 5‑year survey, mapping 47+ million galaxies and quasars to create the most detailed 3D map of the Universe so far #ICCUB researchers made key contributions to DESI, enabling record‑precision tests of dark energy and gravity 🔗 bit.ly/4sQcXge
Thrilled to be part of this amazing team!
Institute of Cosmos Sciences of the University of Barcelona @icc-ub.bsky.social · 9mo ago🔵The RedH0T project, destined to resolve the Hubble tension and determine the expansion rate of the universe, has received an #ERC Synergy Grant for over 12M€! 🤝Co-led by #ICCUB's scientific director Licia Verde and Fred Courbin (ICREA-ICCUB-@ieec.cat) 🏆Congratulations!👏 🔗 https://bit.ly/4qKap3u
Demà 21 de maig a les 19h al centre cívic Sarrià!
Héctor Gil Marín@cosmonautico.bsky.social · last yr.En dues setmanes participaré al event Pint of Science 2025 🍺🪐, será dimecres 21 al centre cívic Sarrià (Kasa Hanaka Sarrià) i parlaré sobre el costat fosc de l'univers (aka Dark Energy i Dark Matter) a partir de les 19h.
🎉🍻Torna el @pintofscience.es a Barcelona! Investigadors de l’ #ICCUB ens parlaran de neutrins, energia fosca i matèria fosca, els grans enigmes que encara desafien la ciència!⚛️💫 Gaudeix-ne en un ambient relaxat i divertit! 🔗 bit.ly/4dllQs8 @delbuitaltot.bsky.social @cosmonautico.bsky.social
Així farem 🫡 La meva xerrada i la del @cosmonautico.bsky.social encaixen genial, així que teniu doble pla per a la setmana! 👀
ICCUBDivulga@iccubdivulga.bsky.social · last yr.🎉🍻Torna el @pintofscience.es a Barcelona! Investigadors de l’ #ICCUB ens parlaran de neutrins, energia fosca i matèria fosca, els grans enigmes que encara desafien la ciència!⚛️💫 Gaudeix-ne en un ambient relaxat i divertit! 🔗 bit.ly/4dllQs8 @delbuitaltot.bsky.social @cosmonautico.bsky.social
En dues setmanes participaré al event Pint of Science 2025 🍺🪐, será dimecres 21 al centre cívic Sarrià (Kasa Hanaka Sarrià) i parlaré sobre el costat fosc de l'univers (aka Dark Energy i Dark Matter) a partir de les 19h.
☄️Today at the @icc-ub.bsky.social at Uni Barcelona we had one of the first presentations of the @desisurvey.bsky.social BAO DR2 results!🔭🧪 You can check it out on Youtube! youtu.be/tuDzhR1SVDg?...
Presentation of the DESI DR2 BAO Results at ICCUB - Héctor Gil Marín
YouTube video by Cosmology at home
youtu.be
🔊 New BAO analysis from the 3-year observations (DR2). Long story short, as follows. 1. DESI alone is consistent with LCDM. 👉 Boring 2. DESI and Planck have a 2.3 discrepancy in Ωm-H0rd plane. 👉Interesting.
📢In less than 24h, @desisurvey.bsky.social will present the 3D BAO analysis of its first 3yr of data (DR2), the BAO analysis of the largest sample of galaxies ever!!! And we will release all DR1 catalogues (1yr of data) as well. You will find all the details on arXiv and SM channels. Stay tuned. 🎶
DESI Survey@desisurvey.bsky.social · last yr.At the same time, we’re also releasing exciting new results, including BAO measurements from galaxies, quasars, and Lyman-alpha forests. 🔗 Info about these results will be available on the DESI website: desi.lbl.gov
🥁Paper Day! Here goes the first bispectrum analysis of the @desisurvey.bsky.social DR1 LRG and QSO data, led by my PhD student Sergi Novell at @icc-ub.bsky.social. In combination with the power spectrum multipoles we measure 150 triangle configurations corresponding to a total volume of 13.1 Gpc3
Dimecres 26 de Febrer a les 19h parlaré sobre la matèria i l'energia fosca i el paper dels cartografiats de galàxies en la cosmologia actual. 📍Agrupació Astronómica de sabadell. 🕖 19h. Entrada lliure fins a completar l'aforament. 🗣 Idioma castellà.
The US government has been turned over to a group of extraordinarily ignorant people, and they are working to destroy science in this country. Cutting over half the NSF budget would save < 0.1% of the federal budget, but do incalculable harm. Simply heartbreaking. arstechnica.com/science/2025...
White House budget proposal could shatter the National Science Foundation
“This kind of cut would kill American science and boost China.”…
arstechnica.com
Cosmology Talks: Recent DESI Power Spectrum Results Some weeks ago I posted an item about recent results that have emerged from the DESI (Dark Energy Spectroscopic Instrument) Collaboration. I have been a bit busy since then but I just saw that there is one of those Cosmology Talks about these…
Cosmology Talks: Recent DESI Power Spectrum Results
Some weeks ago I posted an item about recent results that have emerged from the DESI (Dark Energy Spectroscopic Instrument) Collaboration. I have been a bit busy since then but I just saw that there is one of those Cosmology Talks about these results which I thought I would pass on. The contributors are Arnaud de Mattia, Hector Gil-Marín and Pauline Zarrouk and they are talking about the analsysis they have done using the "full shape" of the galaxy power spectrum. It's quite a long video, but very illuminating.
telescoper.blog
🏅Congratulations to our researcher Licia Verde, who yesterday received the 2024 Medal of the #RSEF-FundacionBBVA! 🌌This prestigious award recognizes her groundbreaking contributions to cosmology, dark matter, and the universe's expansion 👉 icc.ub.edu/news/licia-v... @ub.edu @espai.media
We are excited to present the new power spectrum Full-Shape results on DESI DR1 data @desisurvey. Check all the new papers at data.desi.lbl.gov/doc/papers/. A thread🧵👇
Papers - DESI Data
data.desi.lbl.gov