Author | Lightnews

Reposted by Bernardita Ried Guachalla

Walter Riquelme @wolteriquelme.bsky.social · Jun 2

From last week arXiv!
Check our new paper (with @rafalafelo.bsky.social) on how Cosmological Gravitational Waves could correlate with Large-Scale Structures, and its potential synergies with Primordial non-Gaussianity.

arxiv.org/abs/2505.15084

Imprints of Large-Scale Structures in the Anisotropies of the Cosmological Gravitational Wave Background

We compute the cross-correlation between the anisotropies of the cosmological gravitational wave background (CGWB) and the galaxy density contrast. We show that the cross-correlation is non-zero due t...

arxiv.org

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Bernardita Ried Guachalla @bernarditaried.bsky.social · May 30

My photographic work is now on display at Stanford University, in the Kavli Institute for Particle Astrophysics and Cosmology 😍

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Bernardita Ried Guachalla @bernarditaried.bsky.social · Apr 24

También se puede tener un evento en español y en Chile 😄! Solo revisar el link y cambiar a español :)

NSF–DOE Rubin Observatory @vrubinobs.bsky.social · Apr 24

The world's First Look at imagery from NSF–DOE Rubin Observatory is coming in mid-2025 — and we want the whole world to join in the celebration!🥳 🔭 🧪

Help us bring Rubin to the world and join the global excitement by signing up to host a #RubinWatchParty! ➡️ rubinobservatory.org/news/host-fi...

Promotional graphic for Rubin Observatory's First Look Watch Parties

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Bernardita Ried Guachalla @bernarditaried.bsky.social · Apr 18

En Chile, ahora la cámara del Observatorio Verá Rubin abrió sus ojos. Es un momento histórico

NSF–DOE Rubin Observatory @vrubinobs.bsky.social · Apr 17

Eye to the sky…on-sky engineering tests have begun at NSF–DOE Rubin Observatory using the world’s largest digital camera! 🔭🧪

After installing and testing the LSST Camera, we turned the telescope to the sky—a moment 20 years in the making!

With that, Rubin #CommissioningNotes are back ✍️

🧵

Around two dozen people sit and stand at a long desk with computer monitors out of view. Several people are smiling or have their mouths open in amazement. One person in the back has their arms raised in celebration.

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Reposted by Bernardita Ried Guachalla

Astrobites @astrobites.bsky.social · Apr 4

From Abbé Whitford: Today’s bite looks at the final data release from the Kilo-Degree Survey, reporting a measurement of the clumpiness of the Universe as measured by weak gravitational lensing. 🔭✨☄️
astrobites.org/2025/04/03/sigma8-tension-kids-legacy-galaxyshear/

Is the sigma-8 tension being sheared away? Cosmology with weak lensing from KiDS

Today's bite looks at the final data release from the Kilo-Degree Survey, reporting a measurement of the clumpiness of the Universe as measured by weak gravitational lensing.

astrobites.org

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Bernardita Ried Guachalla @bernarditaried.bsky.social · Apr 9

Come and check our most recent paper on measuring the kinematic Sunyaev-Zel'dovich effect using @desisurvey.bsky.social luminous red galaxies and the latest dataset from @act-pol.bsky.social 😍

arxiv.org/abs/2503.19870

Backlighting extended gas halos around luminous red galaxies: kinematic Sunyaev-Zel'dovich effect from DESI Y1 x ACT

The gas density profile around galaxies, shaped by feedback and affecting the galaxy lensing signal, is imprinted on the cosmic microwave background (CMB) by the kinematic Sunyaev-Zel'dovich effect (k...

arxiv.org

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Bernardita Ried Guachalla @bernarditaried.bsky.social · Apr 4

¡La carta está siendo informada por los medios de comunicación chilenos!

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Bernardita Ried Guachalla @bernarditaried.bsky.social · Apr 4

La carta: drive.google.com/file/d/1HzgJ...

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Bernardita Ried Guachalla @bernarditaried.bsky.social · Apr 4

Entre los firmantes, el premio nobel de física Michael Mayor, junto a más de 700 académicos, 1400 investigadores y 800 estudiantes

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Bernardita Ried Guachalla @bernarditaried.bsky.social · Apr 4

Carta de miles de astrónomos de todo el mundo solicitándole a las autoridades chilenas que se protejan los cielos de Chile y su legado astronómico.

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Bernardita Ried Guachalla @bernarditaried.bsky.social · Mar 19

¡Orgullo Chileno! 🇨🇱

Grande Enrique Paillas 💪

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Reposted by Bernardita Ried Guachalla

Atacama Cosmology Telescope y Simons Observatory en Español @act-simonsobs-es.bsky.social · Mar 13

¡La nueva página del Observatorio Simons ya está disponible! Por ahora solo en inglés, pronto viene la versión en castellano. ¿Qué les parece? ¡Déjennos sus comentarios!

simonsobservatory.org/institutions/

Institutions |

simonsobservatory.org

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Bernardita Ried Guachalla @bernarditaried.bsky.social · Mar 14

The current situation for international Fulbrighters right now. This is an amazing program that has enabled significant advancements in astronomy in both Chile and the US. I hope they don't end it 🙏

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Reposted by Bernardita Ried Guachalla

Astronomer Royal for Scotland | Catherine Heymans @astroroyalscot.bsky.social · Mar 9

Eclipse preppers assemble! It's time to buy some solar eclipse glasses and set notifications in your diary.

🗓️13/14 Mar: Lunar Eclipse
🗓️29 Mar: Partial Solar Eclipse

Time/spectacle depends on your location 🔭🧪

↙️Lunar: www.timeanddate.com/eclipse/luna...
↘️Solar: www.timeanddate.com/eclipse/sola...

A map of the globe with bands indicating where the lunar eclipse will be visible. It's a total eclipse across North And South America and some of Western Europe.

A map of the globe with bands marking where the solar eclipse will be visit. It's a partial eclipse everywhere, with the most of the Sun obscured in eastern Canada and Greenland. Scandinavia, the UK and Western Europe will see about a third of the Sun obscured.

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Bernardita Ried Guachalla @bernarditaried.bsky.social · Mar 6

Please let me know which ones I missed! :)

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Bernardita Ried Guachalla @bernarditaried.bsky.social · Mar 6

10. Universidad Diego Portales: At the Instituto de Estudios Astrofísicos, they focus on observational astronomy at different wavelengths and have a diverse, international community.

astronomia.udp.cl/en/

Astronomia UDP

astronomia.udp.cl

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Bernardita Ried Guachalla @bernarditaried.bsky.social · Mar 6

9. Catholic University of the North: The astronomy institute specializes in galactic astronomy and astronomical instrumentation, with research focusing on galactic archaeology, exoplanets, the interstellar medium, and stellar surface imaging.

www.iaucn.cl

Inicio

www.iaucn.cl

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Bernardita Ried Guachalla @bernarditaried.bsky.social · Mar 6

8. Catholic University of Valparaíso: The Astrophysics Group focuses on various areas of extragalactic astrophysics, utilizing multi-wavelength observations and international observatories in Chile and space-based instruments to enhance understanding of the universe.

fis.ucv.cl/astro/

Astrofísica – Instituto de Física PUCV

fis.ucv.cl

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Bernardita Ried Guachalla @bernarditaried.bsky.social · Mar 6

7. Andrés Bello University: It provides various programs in astronomy, supported by a team of academics and postdoctoral researchers focusing on stellar and extragalactic astronomy. It is located in many cities across the country.

astrounab.cl

astrounab

astrounab.cl

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Bernardita Ried Guachalla @bernarditaried.bsky.social · Mar 6

6. University of Santiago: is one of the leading public universities in Chile, with a strong reputation in various fields. It offers a solid program of astronomy, particularly through its Department of Physics.

fisica.usach.cl/en/astrophys...

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Bernardita Ried Guachalla @bernarditaried.bsky.social · Mar 6

5. University of Antofagasta: It offers a Master's program in Astronomy through its Center for Research, Technology, Education, and Astronomical Outreach (CITEVA), featuring observatories like Ckoirama.

www.uantof.cl/centros/cite...

» Centro de Investigación, Tecnología, Educación y Vinculación Astronómica CITEVAHerramientas de accesibilidadAumentar textoDisminuir textoEscala de grisesAlto contrasteContraste negativoFondo claroS...

www.uantof.cl

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Bernardita Ried Guachalla @bernarditaried.bsky.social · Mar 6

4. University of La Serena: This university is the closest to Las Campanas, CTIO and the Rubin Observatory. It is near the AURA facility and frequently exchanges with astronomers visiting to observe at the AURA facilities and the Carnegie Institution for Science

fciencias.userena.cl/tag/astronom...

astronomía – Facultad de Ciencias de la Universidad de La Serena

fciencias.userena.cl

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Bernardita Ried Guachalla @bernarditaried.bsky.social · Mar 6

3. University of Concepción: Located in the city of Concepción, it has a strong emphasis on scientific research, particularly in the fields of astronomy and astrophysics. The university is known for its collaboration with national and international institutions.

www.astro.udec.cl/e/index-es.h...

Departamento de Astronomia - Main

www.astro.udec.cl

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Bernardita Ried Guachalla @bernarditaried.bsky.social · Mar 6

2. Pontifical Catholic University of Chile: This university's Institute of Astrophysics offers advanced research opportunities and hosts several astronomical observatories, including the Manuel Foster Observatory.

astro.uc.cl

Inicio - Instituto de Astrofísica

El instituto de astrofísica UC es uno de los principales centros de investigación en astrofísica en Chile. Este cuenta con programas de Licenciatura, Magister y Doctorado.

astro.uc.cl

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Bernardita Ried Guachalla @bernarditaried.bsky.social · Mar 6

1. University of Chile: Established in 1842, it is the country's oldest and largest university. Its Department of Astronomy (DAS) provides comprehensive undergraduate and graduate programs and operates the National Astronomical Observatory.

das.uchile.cl

Inicio - DAS - Universidad de Chile

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das.uchile.cl

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