#cosmicvoids — Public Fediverse posts

#Antigravity keeps getting used as a classical example of a [[WP:FRINGE]] theory in #Wikipedia, but in the @cosmology context in #CosmicVoids, there *is* effectively antigravity [1][2]. It wouldn't lift an engine-less spaceship off a planet in a void, but it would make the spaceship very slightly easier to lift off the planet.

[1] https://en.wikipedia.org/wiki/Special:Permalink/1360021024#Cosmological_context:_effective_antigravity

[2] https://academic.oup.com/mnras/article/505/1/1223/6274683 = https://arXiv.org/abs/2010.03742 #ArXiv_2010_03742

#Antigravity keeps getting used as a classical example of a [[WP:FRINGE]] theory in #Wikipedia, but in the @cosmology context in #CosmicVoids, there *is* effectively antigravity [1][2]. It wouldn't lift an engine-less spaceship off a planet in a void, but it would make the spaceship very slightly easier to lift off the planet.

[1] https://en.wikipedia.org/wiki/Special:Permalink/1360021024#Cosmological_context:_effective_antigravity

[2] https://academic.oup.com/mnras/article/505/1/1223/6274683 = https://arXiv.org/abs/2010.03742 #ArXiv_2010_03742

Discover how vast cosmic voids — the universe’s largest empty regions — influence galaxy formation and ripple through space-time as gravitational waves. Explore cutting-edge astrophysics uncovering the hidden role of emptiness in shaping cosmic evolution.
#CosmicVoids #GalaxyFormation #GravitationalWaves #Astrophysics
https://www.scientificworldinfo.com/2026/04/cosmic-voids-affect-galaxy-formation-and-gravitational-waves.html

https://www.youtube.com/watch?v=yDAAlojz8NU

Kurzgesagt alimentando a mis pesadillas

#SpaceIsHard #SpaceIsScary #CosmicVoids #NightmareFuel #Science

https://www.youtube.com/watch?v=yDAAlojz8NU

Kurzgesagt alimentando a mis pesadillas

#SpaceIsHard #SpaceIsScary #CosmicVoids #NightmareFuel #Science

Cosmic Voids: Where Dark Energy Dominates and Drives Universe Expansion

📰 Original title: Cosmic voids look empty but they may be tearing the universe apart

🤖 IA: It's clickbait ⚠️
👥 Usuarios: It's clickbait ⚠️

View full AI summary: https://killbait.com/en/cosmic-voids-where-dark-energy-dominates-and-drives-universe-expansion/?redirpost=6098156e-df6d-476b-b6f2-3200710c688c

#astronomy #cosmicvoids #darkenergy #universeexpansion

While the holy grail of #InhomogeneousCosmology is to explain #DarkEnergy as an epiphenomenon of the cosmologically recent formation epoch of #CosmicVoids and other #LargeScaleStructure, #YonadavBarryGinat and #PedroGFerreira have gone for a more modest goal: keeping the #CosmologicalConstant but tacking on void formation to get a sort-of #BeyondLCDM inhomogeneous model that better matches #DES and #DESI results [1].

#ArXiv_2601_20633
@cosmology #Cosmology #LCDM

[1] https://arxiv.org/abs/2601.20633

While the holy grail of #InhomogeneousCosmology is to explain #DarkEnergy as an epiphenomenon of the cosmologically recent formation epoch of #CosmicVoids and other #LargeScaleStructure, #YonadavBarryGinat and #PedroGFerreira have gone for a more modest goal: keeping the #CosmologicalConstant but tacking on void formation to get a sort-of #BeyondLCDM inhomogeneous model that better matches #DES and #DESI results [1].

#ArXiv_2601_20633
@cosmology #Cosmology #LCDM

[1] https://arxiv.org/abs/2601.20633

in the #arXiv

DESIVAST: A Catalog of Low-Redshift Voids using Data from the DESI DR1 Bright Galaxy Survey

by Hernan Rincon and co-authors
https://arxiv.org/abs/2411.00148

#Cosmology #Astronomy #Astrophysics #Astrodon #DESI #survey #DESIsurvey #galaxies #catalog #void #voids #cosmicvoids #voidfinder #SDSS #science #STEM #research

in the #arXiv

DESIVAST: A Catalog of Low-Redshift Voids using Data from the DESI DR1 Bright Galaxy Survey

by Hernan Rincon and co-authors
https://arxiv.org/abs/2411.00148

#Cosmology #Astronomy #Astrophysics #Astrodon #DESI #survey #DESIsurvey #galaxies #catalog #void #voids #cosmicvoids #voidfinder #SDSS #science #STEM #research

in the #arXiv

2D watershed void clustering for probing the cosmic large-scale structure

by Yingxiao Song and co-authors
https://arxiv.org/abs/2410.04898

#Cosmology #universe #voids #cosmicvoids #CosmicWeb #astronomy #astrophysics #astrodon #physics #space #science #research #STEM #watershed #clustering

in the #arXiv

2D watershed void clustering for probing the cosmic large-scale structure

by Yingxiao Song and co-authors
https://arxiv.org/abs/2410.04898

#Cosmology #universe #voids #cosmicvoids #CosmicWeb #astronomy #astrophysics #astrodon #physics #space #science #research #STEM #watershed #clustering

Cosmography on the cover of Scientific American, with a feature article on cosmic voids

https://scientificamerican.com/issue/sa/2024/01-01/

#cosmology #cosmography #universe #astronomy #astrophysics #astrodon #space #science #research #void #voids #cosmicvoids #sciam #galaxies #cosmicweb

Cosmography on the cover of Scientific American, with a feature article on cosmic voids

https://scientificamerican.com/issue/sa/2024/01-01/

#cosmology #cosmography #universe #astronomy #astrophysics #astrodon #space #science #research #void #voids #cosmicvoids #sciam #galaxies #cosmicweb

@civodul @khinsen

We use #CosmicVoids in [1][2], which in N-body sims are traced by low num-densities of particles => high noise. Full #Maneage controls + fixed seed rng's. We still have intramachine + (higher) intermachine randomness. Statistical upper limits to results OK. But still untraced sources of randomness.

Any clues for remaining randomness [2]?

#Reproducibility #ArXiv_2304_00591 #OpenScience

[1] Frozen record: https://zenodo.org/record/7792910

[2] Live git: https://codeberg.org/mpeper/lensing

@civodul @khinsen

We use #CosmicVoids in [1][2], which in N-body sims are traced by low num-densities of particles => high noise. Full #Maneage controls + fixed seed rng's. We still have intramachine + (higher) intermachine randomness. Statistical upper limits to results OK. But still untraced sources of randomness.

Any clues for remaining randomness [2]?

#Reproducibility #ArXiv_2304_00591 #OpenScience

[1] Frozen record: https://zenodo.org/record/7792910

[2] Live git: https://codeberg.org/mpeper/lensing

#CosmicVoids should be detectable via their #GravitationalLensing effects.
Check this starting with a floppy-disk sized source snapshot [1].
#Reproducibility is via the #Maneage template of shell+make files.
Full research paper: [2][3][4][5]

[1] https://zenodo.org/record/7792910/files/lensing-e4f7af0-snapshot.tar.gz

[2] Preprint: https://arxiv.org/abs/2304.00591 #ArXiv_2304_00591

[3] Frozen record: https://zenodo.org/record/7792910

[4] Live git: https://codeberg.org/mpeper/lensing

[5] SWH: https://archive.softwareheritage.org/swh:1:rev:41507a706e16f04075c0c35853ddc226d3c72df5%3borigin=https://codeberg.org/mpeper/lensing

#Cosmology #OpenScience

#CosmicVoids should be detectable via their #GravitationalLensing effects.
Check this starting with a floppy-disk sized source snapshot [1].
#Reproducibility is via the #Maneage template of shell+make files.
Full research paper: [2][3][4][5]

[1] https://zenodo.org/record/7792910/files/lensing-e4f7af0-snapshot.tar.gz

[2] Preprint: https://arxiv.org/abs/2304.00591 #ArXiv_2304_00591

[3] Frozen record: https://zenodo.org/record/7792910

[4] Live git: https://codeberg.org/mpeper/lensing

[5] SWH: https://archive.softwareheritage.org/swh:1:rev:41507a706e16f04075c0c35853ddc226d3c72df5%3borigin=https://codeberg.org/mpeper/lensing

#Cosmology #OpenScience

The force is with us.

A great, unseen force is pushing our galaxy across the cosmos - a paper by Lauren Tousignant writing for the New York Post on the discovery of the Dipole Repeller: https://nypost.com/2017/02/01/a-great-unseen-force-is-pushing-our-galaxy-across-the-cosmos

The research paper published in Nature Astronomy: https://rdcu.be/wqbG

#dipolerepeller #universe #cosmology #cosmography #astronomy #astrophysics #space #science #galaxies #cosmos #physics #scicom #cosmicweb #cosmicvoids #greatattractor #milkyway #galaxy #nature #research #astrodon

The force is with us.

A great, unseen force is pushing our galaxy across the cosmos - a paper by Lauren Tousignant writing for the New York Post on the discovery of the Dipole Repeller: https://nypost.com/2017/02/01/a-great-unseen-force-is-pushing-our-galaxy-across-the-cosmos

The research paper published in Nature Astronomy: https://rdcu.be/wqbG

#dipolerepeller #universe #cosmology #cosmography #astronomy #astrophysics #space #science #galaxies #cosmos #physics #scicom #cosmicweb #cosmicvoids #greatattractor #milkyway #galaxy #nature #research #astrodon

A stylized visualization of the Dipole Repeller makes it to the cover of Nature Astronomy
https://web.archive.org/web/20170614103445/http://www.nature.com/natastron/volumes/1/issues/2

#universe #cosmology #cosmography #astronomy #astrophysics #space #science #galaxies #cosmos #physics #bigbangtheory #cosmicweb #cosmicvoids #dipolerepeller #greatattractor #milkyway #galaxy #nature #astrodon

A stylized visualization of the Dipole Repeller makes it to the cover of Nature Astronomy
https://web.archive.org/web/20170614103445/http://www.nature.com/natastron/volumes/1/issues/2

#universe #cosmology #cosmography #astronomy #astrophysics #space #science #galaxies #cosmos #physics #bigbangtheory #cosmicweb #cosmicvoids #dipolerepeller #greatattractor #milkyway #galaxy #nature #astrodon