'Twisty' new theory of gravity says information can escape black holes after all: Einstein's theory of relativity say black holes are 'bald', but a new tweak to his research may give the mysterious objects their long-sought 'hair.' #space#spaceexploration#astronomy#physics#blackholes#astrophysics
#X-ray DLPS #paper was accepted (updated version will be on #arXiv tomorrow), so now we can release (almost) all of the light curve #data we used for the paper + a small package to plot the DLPS and classify X-ray light curves :)
The image by the Atacama Photographic Observatory APO team of astronomers, composed of astronomers Thierry Demange, Richard Galli and Thomas Petit, shows a stellar and nebulous landscape located in the direction of the Scorpius Constellation, on the border with the..... #astronomy#space#astrophysics#astrophotography
The image by the Atacama Photographic Observatory APO team of astronomers, composed of astronomers Thierry Demange, Richard Galli and Thomas Petit, shows a stellar and nebulous landscape located in the direction of the Scorpius Constellation, on the border with the..... #astronomy#space#astrophysics#astrophotography
A spherical shell-like structure 1 billion light-years in diameter named Ho’oleilana is discovered in the distribution of relatively nearby galaxies. We posit this is the 1st observation of an individual Baryon Acoustic Oscillation (BAO).
Acoustic waves generated in the hot plasma of the early universe became imprinted in baryon fluctuations. The prediction was made in 1970 by Jim Peebles and others. Indirect evidence of the BAO phenomenom came in 2005 by observing a peak in the pair-wise separations of galaxies.
By contrast, the discovery of Ho'oleilana represents the 1st direct evidence of a BAO, as an individual entity and a new confirmation of the standard model of cosmology.
A discovery made 53 years after the prediction - that's more time elapsed than for e.g. Higgs and his boson!
Ho'oleilana was found unexpectedly in the distribution of galaxies of the Cosmicflows-4 Catalog, within its SDSS PV "Peculiar Velocities" subsample of early-type galaxies, derived from fundamental plane measurements.
The cosmography of Ho'oleilana is pretty amazing: its shell includes some of the largest known structures of the universe: the Sloan Great Wall, CfA Great Wall, Hercules Supercluster, Corona-Borealis Supercluster... At its core is the Boötes Supercluster.
A video visualization of the cosmography of Ho'oleilana is part of the paper. Major components in proximity to the shell are highlighted and identified by name. The historic Boötes Void lies interior to the shell structure.
A major aspect of the study presented in this paper is the analysis conducted by Cullan Howlett to understand the significance of this discovery against a physical BAO model, using in particular mock galaxy catalogs with and without BAO features.
Last but not least, a new measurement of the Hubble Constant is obtained by analyzing the geometrical properties of Ho'oleilana: 76.9 (+8.2)(-4.8) km/s /Mpc
This value is consistent with other direct local probes, and further exacerbates the "Hubble tension" in the ΛCDM model.
Ka’iu and Larry Kimura named other astronomical objects before: the interstellar asteroid ʻOumuamua, the imaged black hole Pōwehi (M87*), and others as part of the "A Hua He Inoa" program: Leleākūhonua an extreme transneptunian, Pōniuāʻena a quasar, ...
Ho'oleilana - a fossil from a time near the birth of the universe
Check out this video for more context and insights on the process of formation of Baryon Acoustic oscillations - with credits to ARC Centre of Excellence for All-Sky Astrophysics (CAASTRO)
A special thanks to digital artist Frédéric Durillon for this beautiful view of Ho'oleilana.
Credits: Frédéric Durillon, Animea Studio; Daniel Pomarède, IRFU, CEA University Paris-Saclay; government funding provided by France 2030 (P2I Graduate School of Physics) ref ANR-11-IDEX-0003
The protostellar object called OH 339.88-1.26 is hidden in this image taken by the Hubble Space Telescope. It is located at a distance of about 8,900 light years from Earth and is located in the direction of the Ara Constellation. The field of view is crossed by sinuous lines of dark dust, which is..... #astronomy#space#astrophysics#astrophotography
Been playing with a little Python script I’m writing that shows a 3D map of the millisecond pulsars observed by our team (PPTA), relative to Earth.
This vid shows the perspective of looking inwards from about 15,000 light years from Earth (blue dot) with surrounding millisecond pulsars (red dots) based on their RA + Dec + distance.
The elegant, sinuous spiral arms of the grandly designed galaxy Messier 51 stretch across this image taken by the James Webb Space Telescope. Unlike the collection of weird and wonderful spiral galaxies with irregular or interrupted spiral arms, highly designed..... #astronomy#space#astrophysics#astrophotography
The elegant, sinuous spiral arms of the grandly designed galaxy Messier 51 stretch across this image taken by the James Webb Space Telescope. Unlike the collection of weird and wonderful spiral galaxies with irregular or interrupted spiral arms, highly designed..... #astronomy#space#astrophysics#astrophotography
The spectacular image by astronomer Juan Carlos Casado shows the moment of maximum of the Geminid meteor shower of 2022. They have been observed from November 19 to December 24, with the largest number of meteors between December 12 and 14. meteors that passed through the..... #astronomy#space#astrophysics#astrophotography