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Posts tagged #Cosmicflows

Vela: the True Scale of a Hidden Giant Structure Revealed

www.sarao.ac.za/news/vela-th...

🧪 #Cosmology #Cosmicflows

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Hidden Vela Supercluster Revealed by First Hybrid Redshift & Peculiar Velocity Reconstruction A large fraction of the extragalactic sky is obscured by foreground dust and stars along the plane of the Milky Way, leaving a major gap (~ 20%) in whole-sky maps of large-scale structures -- an incom...

Cosmography alert 🚨

Hidden Vela Supercluster Revealed by First Hybrid Redshift & Peculiar Velocity Reconstruction

by Amber M. Hollinger and co-authors

arxiv.org/abs/2603.09339

🧪 #Cosmology #Cosmicflows

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Screenshot from the frontpage of the Open Journal of Astrophysics, featuring the following article informations. Title reads "Revisiting the Great Attractor: The Local Group's streamline trajectory, cosmic velocity and dynamical fate". Authors list: Richard Stiskalek, Harry Desmond, Stuart McAlpine, Guilhem Lavaux, Jens Jasche, Michael J. Hudson. Summary reads "The study revisits the Great Attractor concept, finding that it doesn't dominate the Local Group's cosmic velocity; multiple structures contribute to the motion, with no single attractor accounting for it". Dated February 17, 2026. Background image featuring an allsky map of the depth of the inferred Classical Great Attractor basin as a function of sky position in Galactic coordinates.

Screenshot from the frontpage of the Open Journal of Astrophysics, featuring the following article informations. Title reads "Revisiting the Great Attractor: The Local Group's streamline trajectory, cosmic velocity and dynamical fate". Authors list: Richard Stiskalek, Harry Desmond, Stuart McAlpine, Guilhem Lavaux, Jens Jasche, Michael J. Hudson. Summary reads "The study revisits the Great Attractor concept, finding that it doesn't dominate the Local Group's cosmic velocity; multiple structures contribute to the motion, with no single attractor accounting for it". Dated February 17, 2026. Background image featuring an allsky map of the depth of the inferred Classical Great Attractor basin as a function of sky position in Galactic coordinates.

Great paper on the Great Attractor, just published by The Open Journal of Astrophysics

doi.org/10.33232/001...

@ojastro.bsky.social 🧪 #Cosmology #Cosmicflows

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Density field around the regions of the Coma and Perseus clusters of galaxies. Supergalactic coordinates are expressed in terms of recession velocities, in units of kilometers per second.

Density field around the regions of the Coma and Perseus clusters of galaxies. Supergalactic coordinates are expressed in terms of recession velocities, in units of kilometers per second.

Constraining cosmological simulations with peculiar velocities: a forward-modeling approach

by Aurélien Valade and co-authors
arxiv.org/abs/2602.03699

#Cosmology #Cosmicflows 🧪

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How well is the local Large Scale Structure of the Universe known? CosmicFlows vs. Biteau's Galaxy Catalog with Cloning Knowledge of the actual density distribution of matter in the local universe is needed for a variety of purposes -- for instance, as a baseline model for ultrahigh energy cosmic ray sources in the con...

Cosmography alert 🚨

How well is the local Large Scale Structure of the Universe known? CosmicFlows vs. Biteau's Galaxy Catalog with Cloning

by Yifei Li and Glennys Farrar
arxiv.org/abs/2601.20808

🧪 #Cosmology #Cosmicflows

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This is Figure 15 of the paper, a Mollweide projection of the distribution of the DESI DR1 Fundamental Plane sample (blue) in Right Ascension and Declination compared to the Cosmic Flows 4 catalogue (Tully et al., 2023, black) and the DESI EDR sample (Said et al., 2024, orange).

This is Figure 15 of the paper, a Mollweide projection of the distribution of the DESI DR1 Fundamental Plane sample (blue) in Right Ascension and Declination compared to the Cosmic Flows 4 catalogue (Tully et al., 2023, black) and the DESI EDR sample (Said et al., 2024, orange).

Wow 98,000 peculiar velocities

The DESI DR1 Peculiar Velocity Survey: Fundamental Plane Catalogue
by C.E. Ross and co-authors
arxiv.org/abs/2512.03226

For comparison: the Great Attractor was discovered with 400 PVs, Laniakea with 8000 PVs, South Pole Wall with 18,000 PVs

#Cosmicflows #Cosmology 🧪

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A map of the Earth with a question mark. Final slide of the conference, by Cullan Howlett.

A map of the Earth with a question mark. Final slide of the conference, by Cullan Howlett.

The End

Next meeting?

Let's not wait 5 years to see each other again!

#cosmicflows2025 #cosmicflows #cosmology

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Trending: basins of attraction

nature.com/natastron/
nature.com/articles/s41...
rdcu.be/dVh3s

#Cosmology #Cosmicflows #galaxies #Cosmography #ΛCDM #EndOfGreatness #Laniakea #LaniakeaSupercluster #Shapley #SloanGreatWall #Astronomy #Universe #astrophysics #science #STEM #trending #altmetric

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Featured

nature.com/natastron/
www.nature.com/articles/s41...

#Cosmology #Cosmicflows #galaxies #Nature #Astronomy #Universe #Astrophysics #Science #STEM

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Key gravitational structures unveiled in new cosmic research Paris, France (SPX) Sep 30, 2024 - A group of international scientists has made significant strides in understanding the large-scale structure of the Universe by identifying critical gravitational reg...

Key gravitational structures unveiled in new cosmic research

#Cosmology #Cosmicflows #galaxies #ΛCDM #News #Laniakea #Shapley #Universe #astronomy #astrophysics #science #STEM #gravitation #physics

www.spacedaily.com/reports/Key_...

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New map of the universe shows mega structures

www.aip.de/en/news/cosm...

#Cosmology #Cosmicflows #galaxies #Cosmography #CosmicWeb #ΛCDM #Laniakea #supercluster #LaniakeaSupercluster #Shapley #SloanGreatWall #Astronomy #Universe #Astrophysics #science #STEM #news

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So, with a group of 7 we've been working these past two years on the reconstruction and cosmography of Cosmicflows-4, and the result will go public tomorrow, stay tuned!

#Cosmicflows #Cosmography #Cosmology #CF4 #Cosmicflows4 #galaxies #astronomy #astrophysics #science #STEM #physics #gravitation

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Meet the Laniakea supercluster - Nature The 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 ...

Meet the Laniakea supercluster

www.nature.com/articles/513...

#Laniakea #supercluster #galaxies #Nature #astronomy #astrophysics #cosmology #cosmography #universe #space #MilkyWay #science #research #STEM #cartography #youarehere #LaniakeaSupercluster #Galaxy #STEM #cosmicflows

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in the #arXiv

DESI Peculiar Velocity Survey – Fundamental Plane
by Khaled Said and co-authors
arxiv.org/abs/2408.13842

#Cosmology #galaxies #cosmicflows #astronomy #astrophysics #science #STEM #DESI #FundamentalPlane #HubbleConstant #TullyFisher

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Introducing the Mass Hyperplane (MH), to measure the peculiar velocities of 2496 galaxies at z < 0.12 from the GAMA sample

by Mustafa Burak Dogruel and co-authors
arxiv.org/abs/2405.10866

#Cosmology #galaxies #MassHyperplane #TullyFisher #FundamentalPlane #cosmicflows #astrophysics #science

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