Zobrazeno 1 - 10
of 49
pro vyhledávání: '"Pomaréde, Daniel"'
Autor:
Valade, Aurelien, Libeskind, Noam I., Pomarede, Daniel, Tully, R. Brent, Hoffmann, Yehuda, Pfeifer, Simon, Kourkchi, Ehsan
Structure in the Universe is believed to have evolved out of quantum fluctuations seeded by inflation in the early Universe. These fluctuations lead to density perturbations that grow via gravitational instability into large cosmological structures.
Externí odkaz:
http://arxiv.org/abs/2409.17261
Autor:
Hoffman, Yehuda, Valade, Aurélien, Libeskind, Noam I., Sorce, Jenny G., Tully, R. Brent, Pfeifer, Simon, Gottlöber, Stefan, Pomaréde, Daniel
The reconstruction of the large scale velocity field from the grouped Cosmicflows-4 (CF4) database is presented. The lognormal bias of the inferred distances and velocities data is corrected by the Bias Gaussianization correction (BGc) scheme, and th
Externí odkaz:
http://arxiv.org/abs/2311.01340
Publikováno v:
2023, Astrophysical Journal, 954, 169
Theory of the physics of the early hot universe leads to a prediction of baryon acoustic oscillations that has received confirmation from the pair-wise separations of galaxies in samples of hundreds of thousands of objects. Evidence is presented here
Externí odkaz:
http://arxiv.org/abs/2309.00677
Autor:
Courtois, Hélène M., Said, Khaled, Mould, Jeremy, Jarrett, T. H., Pomarède, Daniel, Westmeier, Tobias, Staveley-Smith, Lister, Dupuy, Alexandra, Hong, Tao, Guinet, Daniel, Howlett, Cullan, Deg, Nathan, For, Bi-Qing, Kleiner, Dane, Koribalski, Bärbel, Lee-Waddell, Karen, Rhee, Jonghwan, Spekkens, Kristine, Wang, Jing, Wong, O. I., Bigiel, Frank, Bosma, Albert, Colless, Matthew, Davis, Tamara, Holwerda, Benne, Karachentsev, Igor, Kraan-Korteweg, Renée C., McQuinn, Kristen B. W., Meurer, Gerhardt, Obreschkow, Danail, Taylor, Edward
The WALLABY pilot survey has been conducted using the Australian SKA Pathfinder (ASKAP). The integrated 21-cm HI line spectra are formed in a very different manner compared to usual single-dish spectra Tully-Fisher measurements. It is thus extremely
Externí odkaz:
http://arxiv.org/abs/2210.12498
Autor:
Tully, R. Brent, Kourkchi, Ehsan, Courtois, Hélène M., Anand, Gagandeep S., Blakeslee, John P., Brout, Dillon, de Jaeger, Thomas, Dupuy, Alexandra, Guinet, Daniel, Howlett, Cullan, Jensen, Joseph B., Pomarède, Daniel, Rizzi, Luca, Rubin, David, Said, Khaled, Scolnic, Daniel, Stahl, Benjamin E.
With Cosmicflows-4, distances are compiled for 55,877 galaxies gathered into 38,065 groups. Eight methodologies are employed, with the largest numbers coming from the correlations between the photometric and kinematic properties of spiral galaxies (T
Externí odkaz:
http://arxiv.org/abs/2209.11238
The trajectories since z=4 of systems of galaxies (`halos') with cz < 8,000 km/s are found through Numerical Action reconstructions. A set of 9,719 halos from a 2MASS group catalog and Cosmicflows-3 catalogs are given attention. Present distances are
Externí odkaz:
http://arxiv.org/abs/2201.12315
Autor:
Pomarede, Daniel, Tully, R. Brent, Graziani, Romain, Courtois, Helene M., Hoffman, Y., Lezmy, Jeremy
Velocity and density field reconstructions of the volume of the universe within 0.05c derived from the Cosmicflows-3 catalog of galaxy distances has revealed the presence of a filamentary structure extending across ~ 0.11c. The structure, at a charac
Externí odkaz:
http://arxiv.org/abs/2007.04414
Autor:
Kourkchi, Ehsan, Courtois, Helene M., Graziani, Romain, Hoffman, Yehuda, Pomarede, Daniel, Shaya, Edward J., Tully, R. Brent
Publikováno v:
2020, AJ, 159, 67
Tools are provided at the Extragalactic Distance Database website that provide relationships between the distances and velocities of galaxies based on smoothed versions of the velocity fields derived by the Cosmicflows program.
Comment: 10 pages
Comment: 10 pages
Externí odkaz:
http://arxiv.org/abs/1912.07214
Autor:
Libeskind, Noam I, Carlesi, Edoardo, Muller, Oliver, Pawlowski, Marcel S, Hoffman, Yehuda, Pomarede, Daniel, Courtois, Helene M, Tully, R. Brent, Gottloeber, Stefan, Steinmetz, Matthias, Sorce, Jenny, Knebe, Alexander
To date at least 10 highly flattened planes of dwarf galaxies are claimed to have been discovered in the Local Universe. The origin of these planes of galaxies remains unknown. One suggestion is that they are related to the large-scale structure of t
Externí odkaz:
http://arxiv.org/abs/1909.07720
Autor:
Tully, R Brent, Pomarede, Daniel, Graziani, Romain, Courtois, Helene M, Hoffman, Yehuda, Shaya, Edward J
Cosmicflows-3 distances and inferred peculiar velocities of galaxies have permitted the reconstruction of the structure of over and under densities within the volume extending to 0.05c. This study focuses on the under dense regions, particularly the
Externí odkaz:
http://arxiv.org/abs/1905.08329