Results 1 to 10 of about 174,077,848 (300)

Field-level Neural Network Emulator for Cosmological N-body Simulations

The Astrophysical Journal, 2023
We build a field-level emulator for cosmic structure formation that is accurate in the nonlinear regime. Our emulator consists of two convolutional neural networks trained to output the nonlinear displacements and velocities of N -body simulation ...
Drew Jamieson, Yin Li, Renan Alves de Oliveira, Francisco Villaescusa-Navarro, Shirley Ho, David N. Spergel   +5 more
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Ho’oleilana: An Individual Baryon Acoustic Oscillation?

The Astrophysical Journal, 2023
Theory of the physics of the early hot universe leads to a prediction of baryon acoustic oscillations (BAOs) that has received confirmation from the pairwise separations of galaxies in samples of hundreds of thousands of objects.
R. Brent Tully, Cullan Howlett, Daniel Pomarède   +2 more
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Euclid preparation

Astronomy & Astrophysics
We investigated the accuracy and range of validity of the perturbative model for the two-point (2PCF) and three-point (3PCF) correlation functions in real space in view of the forthcoming analysis of the Euclid mission spectroscopic sample.
Guidi M., Veropalumbo A., Pugno A., Moresco M., Sefusatti E., Porciani C., Branchini E., Breton M.-A., Camacho Quevedo B., Crocce M., de la Torre S., Desjacques V., Eggemeier A., Farina A., Kärcher M., Linde D., Marinucci M., Moradinezhad Dizgah A., Moretti C., Pardede K., Pezzotta A., Sarpa E., Amara A., Andreon S., Auricchio N., Baccigalupi C., Bagot D., Baldi M., Bardelli S., Battaglia P., Biviano A., Brescia M., Camera S., Cañas-Herrera G., Capobianco V., Carbone C., Cardone V. F., Carretero J., Castellano M., Castignani G., Cavuoti S., Chambers K. C., Cimatti A., Colodro-Conde C., Congedo G., Conversi L., Copin Y., Courbin F., Courtois H. M., Da Silva A., Degaudenzi H., De Lucia G., Dole H., Douspis M., Dubath F., Dupac X., Dusini S., Escoffier S., Farina M., Farinelli R., Faustini F., Ferriol S., Finelli F., Fosalba P., Fotopoulou S., Frailis M., Franceschi E., Fumana M., Galeotta S., Gillis B., Giocoli C., Gracia-Carpio J., Grazian A., Grupp F., Guzzo L., Haugan S. V. H., Holmes W., Hormuth F., Hornstrup A., Jahnke K., Jhabvala M., Joachimi B., Keihänen E., Kermiche S., Kiessling A., Kubik B., Kümmel M., Kunz M., Kurki-Suonio H., Le Brun A. M. C., Ligori S., Lilje P. B., Lindholm V., Lloro I., Mainetti G., Maino D., Maiorano E., Mansutti O., Marcin S., Marggraf O., Markovic K., Martinelli M., Martinet N., Marulli F., Massey R., Medinaceli E., Mei S., Melchior M., Mellier Y., Meneghetti M., Merlin E., Meylan G., Mora A., Morin B., Moscardini L., Munari E., Neissner C., Niemi S.-M., Padilla C., Paltani S., Pasian F., Pedersen K., Percival W. J., Pettorino V., Pires S., Polenta G., Poncet M., Popa L. A., Raison F., Rebolo R., Renzi A., Rhodes J., Riccio G., Romelli E., Roncarelli M., Saglia R., Sakr Z., Sánchez A. G., Sapone D., Sartoris B., Schewtschenko J. A., Schneider P., Schrabback T., Scodeggio M., Secroun A., Seidel G., Seiffert M., Serrano S., Simon P., Sirignano C., Sirri G., Spurio Mancini A., Stanco L., Steinwagner J., Tallada-Crespí P., Tavagnacco D., Taylor A. N., Tereno I., Tessore N., Toft S., Toledo-Moreo R., Torradeflot F., Tsyganov A., Tutusaus I., Valenziano L., Valiviita J., Vassallo T., Verdoes Kleijn G., Wang Y., Weller J., Zamorani G., Zerbi F. M., Zucca E., Allevato V., Ballardini M., Bolzonella M., Bozzo E., Burigana C., Cabanac R., Calabrese M., Cappi A., Di Ferdinando D., Escartin Vigo J. A., Gabarra L., Martín-Fleitas J., Matthew S., Maturi M., Mauri N., Metcalf R. B., Nucita A. A., Pöntinen M., Risso I., Scottez V., Sereno M., Tenti M., Viel M., Wiesmann M., Akrami Y., Andika I. T., Anselmi S., Archidiacono M., Atrio-Barandela F., Balaguera-Antolinez A., Bertacca D., Bethermin M., Blot L., Böhringer H., Borgani S., Brown M. L., Bruton S., Calabro A., Caro F., Carvalho C. S., Castro T., Cogato F., Conseil S., Contarini S., Cooray A. R., Cucciati O., Davini S., De Paolis F., Desprez G., Díaz-Sánchez A., Diaz J. J., Di Domizio S., Diego J. M., Dimauro P., Enia A., Fang Y., Ferrari A. G., Ferreira P. G., Finoguenov A., Franco A., Ganga K., García-Bellido J., Gasparetto T., Gautard V., Gaztanaga E., Giacomini F., Gianotti F., Gozaliasl G., Gutierrez C. M., Hernández-Monteagudo C., Hildebrandt H., Hjorth J., Joudaki S., Kajava J. J. E., Kang Y., Kansal V., Karagiannis D., Kiiveri K., Kirkpatrick C. C., Kruk S., Lattanzi M., Legrand L., Lembo M., Lepori F., Leroy G., Lesci G. F., Lesgourgues J., Leuzzi L., Liaudat T. I., Loureiro A., Macias-Perez J., Maggio G., Magliocchetti M., Mannucci F., Maoli R., Martins C. J. A. P., Maurin L., Miluzio M., Monaco P., Morgante G., Nadathur S., Naidoo K., Navarro-Alsina A., Nesseris S., Pagano L., Passalacqua F., Paterson K., Patrizii L., Pisani A., Potter D., Quai S., Radovich M., Reimberg P., Rocci P.-F., Rodighiero G., Sacquegna S., Sahlén M., Sanders D. B., Schneider A., Sciotti D., Sellentin E., Smith L. C., Sorce J. G., Tanidis K., Tao C., Testera G., Teyssier R., Tosi S., Troja A., Tucci M., Valieri C., Venhola A., Vergani D., Vernizzi F., Verza G., Vielzeuf P., Walton N. A.   +309 more
doaj   +7 more sources

The Galaxy–Halo Connection of DESI Luminous Red Galaxies with Subhalo Abundance Matching

The Astrophysical Journal, 2023
We use subhalo abundance and age distribution matching to create magnitude-limited mock galaxy catalogs at z ∼ 0.43, 0.52, and 0.63 with z -band and 3.4 μ m W 1-band absolute magnitudes and r − z and r − W 1 colors. From these magnitude-limited mocks, we
Angela M. Berti, Kyle S. Dawson, Wilber Dominguez   +2 more
doaj   +1 more source

Cosmic voids and the kinetic analysis

Astronomy & Astrophysics
We study the appearance and specific properties of the structures in the local Universe by means of the Vlasov kinetic technique. We consider the role of the cosmological constant in local structure formation via the theorem on the general function that ...
Gurzadyan V. G., Fimin N. N., Chechetkin V. M.   +2 more
doaj   +1 more source

The stability of voids in the Local Universe: The role of the cosmological constant

Astronomy & Astrophysics
The Vlasov kinetic formalism is employed to study the evolution and stability of cosmic voids in the Local Universe, taking into account not only the gravitational attraction, but also the repulsive effect of the cosmological constant (i.e., local dark ...
Gurzadyan V. G., Fimin N. N., Chechetkin V. M.   +2 more
doaj   +1 more source

Radius-dependent Spin Transition of Dark Matter Halos

The Astrophysical Journal, 2023
A numerical detection of the radius-dependent spin transition of dark matter halos is reported. Analyzing the data from the IllustrisTNG simulations, we measure the halo spin vectors at several inner radii within the virial boundaries and investigate ...
Jun-Sung Moon, Jounghun Lee
doaj   +1 more source

Hidden Vela supercluster revealed by the first hybrid redshift and peculiar velocity reconstruction

Astronomy & Astrophysics
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 incompleteness that is even more severe for peculiar velocity
Hollinger A. M., Courtois H. M., Kraan-Korteweg R. C., Mould J., Rajohnson S. H. A.   +4 more
doaj   +1 more source

Cluster-counterpart Voids: Void Identification from Galaxy Density Field

The Astrophysical Journal, 2023
We identify cosmic voids from galaxy density fields under the theory of void–cluster correspondence. We extend the previous novel void-identification method developed for the matter density field to the galaxy density field for practical applications ...
Junsup Shim, Changbom Park, Juhan Kim, Sungwook E. Hong   +3 more
doaj   +1 more source

The Density Parity Model for the Evolution of the Subhalo Inner Spin Alignments with the Cosmic Web

The Astrophysical Journal, 2023
We develop a new model within which the radius-dependent transition of the subhalo inner spins with respect to the cosmic web and the variation of the transition threshold radius ( r _th ) with subhalo mass ( M _vir ), smoothing scale ( r _f ), and ...
Jun-Sung Moon, Jounghun Lee
doaj   +1 more source