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#cosmography

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Daniel Pomarède

I had the pleasure to be interviewed by Alexandre Morales for France Culture, to talk about the discovery of Quipu, one of the largest known structure of the Universe. It will air tomorrow morning at 6:52.

Here is the press release by the authors of the discovery at MPI Garching mpg.de/24197951/largest-supers

www.mpg.deLargest superstructure in the nearby universe discoveredScientists have identified a colossal superstructure of dark matter, marking a significant advancement in cosmological research
#Quipu#QuipuSupercluster#Cosmology
Public
Daniel Pomarède

Wowzer! Map of cosmic flows, by yours truly, makes it to the cover of the Nature Astronomy journal.

"Galaxies from
wherever flock
together"

I'm no poet, but could this be a Haiku?

nature.com/natastron/volumes/8

Credits:
Image: Daniel Pomarède, Institut de Recherche sur les Lois Fondamentales de l’Univers, CEA, Université Paris-Saclay.
Cover design: Bethany Vukomanovic.

A cover of the Nature Astronomy journal, dated December 2024, Volume 8, issue number 12, featuring a three-dimensional visualization of the cosmic velocity field inferred from the Cosmicflows-4 catalog of galaxies' distances and velocities. This map spans two billion lightyears from top to bottom. The velocity field is mapped by means of tens of thousands of very thin streamlines, seeded at the positions of the catalog's galaxies. Streamlines are shown white and semi-transparent, against a black background. They exhibit a very complex pattern with multiple attractors, seen as points of convergence of the lines. A text reads Galaxies from wherever flock together.
#Cosmology#Galaxies#Astronomy
Public
Daniel Pomarède

Advanced data shed light on gravitational basins of attraction that shape the movement of galaxies

A new study has mapped out the gravitational basins of attraction in the local universe, offering fresh insights into the large-scale cosmic structures that shape the movement of galaxies. The study has been published in #NatureAstronomy

phys.org/news/2024-09-advanced

Phys.org · Advanced data shed light on gravitational basins of attraction that shape the movement of galaxiesBy Hebrew University of Jerusalem
#Cosmology#Cosmicflows#galaxies
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Daniel Pomarède

Meet the Laniakea supercluster

nature.com/articles/513041a

NatureMeet the Laniakea supercluster - NatureThe Milky Way is a member of the Local Group of galaxies. Now have sufficient data on the distances and motions of galaxies to be able to describe a much larger level of organization in our corner of the Universe — a supercluster 160 megaparsecs across and containing 1017 solar masses. Brent Tully et al. use a new catalogue of 'peculiar velocities', line-of-sight departures from cosmic expansion caused by gravitational perturbation, to develop a map representing the distribution of matter. They identify a 'home' supercluster that they name Laniakea — from the Hawaiian lani and akea ('heaven' and 'spacious'). It includes the Virgo cluster, the Norma, Hydra and Centaurus clusters (also known as the Great Attractor), the Pavo-Indus filament and a number of voids.
#Laniakea#supercluster#galaxies
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