Misael Valladares

Student interested in Theoretical Cosmology.

[Misael Valladares @Misael_V66]

A year ago, v. 2 of the paper "Inflation: Theory & Observations" was released, further intensifying my fascination for Inflationary Cosmology. My gratitude goes to @GuiLeiPimentel , Wallisch & Wu; I had the honor of being listed in the Endorsers section.

https://t.co/k5UwYVXZVe

[J R D M B @jrdmb]

Daniel Baumann (@DD_Baumann) lecture notes on Cosmological Correlations from the BUSSTEP Sept 2026 summer school. Includes 2 problem sets and several reference materials. Notes written together with Austin Joyce.

https://t.co/CP1TDPQUXh

school webpage: https://t.co/MJtUDzFL60

[Shaun Hotchkiss @just_shaun]

"I don't see why they can't just combine Pantheon+ and DES-Dovekie and get even tighter dark energy constraints"

Your wish is granted!

Featuring @tamarastro @astrojason20 & Ryan Camilleri

https://t.co/WSNUDj4N1d

[Ethan Siegel @StartsWithABang]

The “perfect cosmological principle” isn’t true for our Universe

On the largest scales, the Universe is the same everywhere in space.

Could it also be the same everywhere in time?

That's the Perfect Cosmological Principle: fascinating, but untrue.

https://t.co/9m9xYmooBV

[Shaun Hotchkiss @just_shaun]

Featuring Carlos García-García & William Wolf

Paper: https://t.co/Z3mwId8sXe

[Thomas Colas @CosmoColas]

1/ 📄 New paper’s out: we study phase coherence in primordial #cosmology.
The sharp acoustic peaks of the CMB and their late-time imprint in BAO require primordial perturbations to oscillate with extremely coherent phases.
What fixes this coherence? 🧵
https://t.co/fEbeMnbLyT

[Astrophysics Papers @AstroPHYPapers]

Tensor-Induced Backreaction in Ultra-Slow-Roll Inflation

Alessandro Ciaiolo, Giovanni Marozzi
https://t.co/Zy3ybvPqRK [𝚊𝚜𝚝𝚛𝚘-𝚙𝚑.𝙲𝙾 𝚐𝚛-𝚚𝚌 𝚑𝚎𝚙-𝚝𝚑]

[Kavli IPMU @KavliIPMU]

LiteBIRD, the JAXA-led next-generation cosmic microwave background polarization satellite involving Kavli IPMU's Tomotake Matsumura, has successfully passed Mission Definition Review #2.
https://t.co/rdlA1DFmMA

[Ethan Siegel @StartsWithABang]

Is the Universe truly infinite in size?

The observable Universe is "only" 13.8 billion years old, extending for 46 billion light-years in all directions.

But what about the unobservable Universe?

It could still be infinite!
https://t.co/ZJooej5O7H

[Shaun Hotchkiss @just_shaun]

Fascinated by recent evidence for evolving dark energy?

But wondering what it all means for fundamental physics models?

Cosmology Talks has you covered!

Everything you need to know about single scalar field dark energy in 2026

https://t.co/egx8mxRXJJ

[Astrophysics Papers @AstroPHYPapers]

Growth, geometry, and early-universe split of the matter density parameter Ωₘ

Felicitas Keil, Isaac Tutusaus, Alain Blanchard
https://t.co/pn6e4oxrpF [𝚊𝚜𝚝𝚛𝚘-𝚙𝚑.𝙲𝙾]

[Astrophysics Papers @AstroPHYPapers]

Signals from the early Universe: a comprehensive search for primordial features in Planck CMB datasets

Antonio Raffaelli, Mario Ballardini, Nicola Barbieri
https://t.co/rqs9oLwmoJ [𝚊𝚜𝚝𝚛𝚘-𝚙𝚑.𝙲𝙾]

[Wen Yin @yinwen1117]

「なぜ、宇宙は4Dか？」

重力以外の「力」は、3D以下では極めて強く、5D以上では弱い。4Dはその境界。

ならば、4D時空そのものが「力の性質」によって選ばれた？

多次元時空が制御可能な超重力理論を構築し、力の特性から自発的に4Dが現れることを示しました！

https://t.co/WE6kQ7cVYw #TMUPT

[Astrophysics Papers @AstroPHYPapers]

Anisotropic separate universe: Long-wavelength perturbations and conserved quantities

Daiki Saito, Atsushi Naruko
https://t.co/QzFXEcuRAM [𝚊𝚜𝚝𝚛𝚘-𝚙𝚑.𝙲𝙾 𝚐𝚛-𝚚𝚌]

[Thomas Van Riet @ThomasVanRiet2]

Surprise : if you allow enough parameters you can match data

https://t.co/qFIoZazHW6

[Astrophysics Papers @AstroPHYPapers]

Cosmology from HI galaxy surveys with the SKA

Ainulnabilah Nasirudin, Philip Bull, Ziad Sakr, Joël Mayor, Benedict Bahr-Kalus, Hengxing Pan, Stefano Camera, José Fonseca, Liantsoa F. Randrianjanahary, Gabriella De Lucia, …
https://t.co/MW76vSVGiY [𝚊𝚜𝚝𝚛𝚘-𝚙𝚑.𝙲𝙾]

[Shaun Hotchkiss @just_shaun]

Latest DESI (+CMB +SN) data got you spooked? Seeing ghosts and *phantoms*?

Don't panic!

@Primeval_Arhsim is here to reassure you: "No phantoms are needed by current observational cosmology"

https://t.co/e8Trb1vlFD

[Swagat Saurav Mishra @Primeval_Arhsim]

Hope you enjoy watching this latest release on Cosmology Talks, where Shaun & I discuss about Interpretation of Evolving Dark Energy from Cosmological observations, including Phantom & Phantom-crossing behavior: in the context of DESI results & beyond. (Based on my new paper) ✨

[Swagat Saurav Mishra @Primeval_Arhsim]

1/3] What is Dynamical Phantom Dark Energy? Absolutely delighted to have received many +ve feedbacks from Cosmology colleagues: both theorists & observers! Sharing here again for wider reach. Hope U find it informative; Happy to discuss more. YouTube link: https://t.co/hR0UIC6Jj2

[Daniel Pomarède @DanielPomarede]

In a study published today in Nature, two researchers argue galaxies align in enormous filaments even on scales where the cosmos should appear smooth and uniform.

https://t.co/rxKAijejOc

#Cosmology @Nature @ScienceMagazine @fsyloslab

[Gaston Giribet @GastonGiribet]

Sobre la ecuación de estado del sector oscuro: https://t.co/KDKgKFzCon La posible variación de la densidad de energía oscura a lo largo de la historia cósmica, y la pregunta acerca de la posible variación de la ecuación de estado de la materia oscura.