Results 71 to 80 of about 15,250,094 (223)

Galaxy Cluster Detection and Dynamical Analysis in the VIPERS High-redshift Spectroscopic Survey

The Astrophysical Journal
We present a dynamical analysis of galaxy clusters identified in the VIPERS spectroscopic survey within the redshift range 0.5 ≤ z ≤ 1.2. Cluster candidates were first detected as overdense regions in redshift space through the Finger-of-God (FoG) effect,
Mohamed H. Abdullah, Omnia I. Adly, Gillian Wilson, Magdy Y. Amin, A. Ahmed   +4 more
doaj   +1 more source

Euclid: Quick Data Release (Q1) – Watching ICM-selected galaxy clusters with Euclid eyes: Prospects of Euclid data in the context of large SZE- and X-ray-based surveys★

Astronomy & Astrophysics
Galaxy clusters detected through their X-ray emission or Sunyaev–Zeldovich effect (SZE), both produced by the intracluster medium (ICM), have been successfully used in cosmological and astrophysical studies.
Klein M., George K., Mohr J. J., Altieri B., Amendola L., Andreon S., Auricchio N., Baccigalupi C., Baldi M., Balestra A., Bardelli S., Biviano A., Branchini E., Brescia M., Camera S., Cañas-Herrera G., Capobianco V., Carbone C., Carretero J., Casas S., 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., Cropper M., Da Silva A., Degaudenzi H., De Lucia G., Dolding C., Dole H., Dubath F., Ducret F., Dupac X., Dusini S., Farina M., Farinelli R., Faustini F., Ferriol S., Finelli F., Frailis M., Franceschi E., Fumana M., Galeotta S., Gillis B., Giocoli C., Gracia-Carpio J., Grazian A., Grupp F., Haugan S. V. H., Holmes W., Hook I. M., Hormuth F., Hornstrup A., Jahnke K., Jhabvala M., Keihänen E., Kermiche S., Kubik B., Kümmel M., Kunz M., Kurki-Suonio H., Le Brun A. M. C., Le Mignant D., Ligori S., Lilje P. B., Lindholm V., Lloro I., Mainetti G., Maino D., Maiorano E., Mansutti O., Marggraf O., Martinelli M., Martinet N., Marulli F., Massey R., Maurogordato S., Medinaceli E., Mei S., Mellier Y., Meneghetti M., Merlin E., Meylan G., Moscardini L., Nakajima R., 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., Pozzetti L., Raison F., Rebolo R., Renzi A., Rhodes J., Riccio G., Romelli E., Roncarelli M., Rosset C., Rottgering H. J. A., Saglia R., Sakr Z., Sapone D., Schirmer M., Schneider P., Schrabback T., Secroun A., Sefusatti E., Seidel G., Serrano S., Sirignano C., Sirri G., Stanco L., Steinwagner J., Tallada-Crespí P., Taylor A. N., Tereno I., Toft S., Toledo-Moreo R., Torradeflot F., Tutusaus I., Valenziano L., Valiviita J., Vassallo T., Veropalumbo A., Wang Y., Weller J., Zerbi F. M., Zucca E., Burigana C., Scottez V., Sereno M., Viel M.   +146 more
doaj   +1 more source

A critical analysis of high-redshift, massive, galaxy clusters. Part I [PDF]

Journal of Cosmology and Astroparticle Physics, 2012
20 pages, 6 figures, 2 tables, modified to match accepted version (JCAP); title changed, main analysis unchanged, additional ...
Ben Hoyle, Raul Jimenez, Licia Verde, Shaun Hotchkiss   +3 more
openaire   +3 more sources

Lactea: Web‐Based Spectrum‐Preserving Multi‐Resolution Visualization of the GAIA Star Catalog

Computer Graphics Forum, Volume 44, Issue 3, June 2025.
Abstract The explosion of data in astronomy has resulted in an era of unprecedented opportunities for discovery. The GAIA mission's catalog, containing a large number of light sources (mostly stars) with several parameters such as sky position and proper motion, is playing a significant role in advancing astronomy research and has been crucial in ...
Reem Alghamdi, Markus Hadwiger, Guido Reina, Alberto Jaspe‐Villanueva   +3 more
wiley   +1 more source

Galaxy clustering and dynamics from redshift surveys [PDF]

, 1990
The clustering and dynamical properties of the 368 galaxies in the redshift surveys of Metcalfe et al. (1989) and Parker et al. (1986) are investigated. These galaxies were selected from ten high galactic latitude fields complete to a magnitude limit of ...
Hale-Sutton, D, Hale-Sutton, Duncan
core  

SAPPHIRES: A Galaxy Overdensity in the Heart of Cosmic Reionization at z = 8.47

The Astrophysical Journal
We report the discovery of a galaxy protocluster candidate (dubbed MACS0416-OD-z8p5) at a spectroscopic redshift of z  ∼ 8.47, dating back to ∼550 Myr after the Big Bang.
Yoshinobu Fudamoto, Jakob M. Helton, Xiaojing Lin, Fengwu Sun, Peter Behroozi, Tiger Yu-Yang Hsiao, Eiichi Egami, Andrew J. Bunker, Francesco D’Eugenio, Yuichi Harikane, Masami Ouchi, Yichen Liu, Weizhe Liu, Roberto Maiolino, Zhiyuan Ji, Xiangyu Jin, Wei Leong Tee, Feige Wang, Christopher N. A. Willmer, Yi Xu, Jinyi Yang, Yongda Zhu   +21 more
doaj   +1 more source

Ultra-low-frequency Gravitational Waves from Massive Clusters at z ∼ 1

The Astrophysical Journal, 2023
Recent progress with pulsar timing array experiments, especially from the NANOGrav collaboration, indicates that we are on the cusp of detecting significant signals from the inspiral of supermassive black hole (BH) binaries.
David K. Wendt, Roger W. Romani
doaj   +1 more source

swPHoToNs: Toward trillion‐body‐scale cosmological N‐body simulations on Sunway TaihuLight supercomputer

Engineering Reports, Volume 7, Issue 3, March 2025.
We present the details of implementing a highly efficient and scalable Cosmological N‐body simulation framework on the heterogeneous many‐core supercomputer Sunway TaihuLight. We manage to conduct cosmological simulations which contain up to 1.6 trillion particles, obtaining a sustained performance of 56.3 PFlops with a weak‐scaling parallel efficiency
Zhao Liu, Qiao Wang, Xiaojing Lv, Xu Liu, Hongsong Meng, Guanghui Zhu, Liang Gao, Haohuan Fu, Guangwen Yang   +8 more
wiley   +1 more source

The relationship between Gas and Galaxies [PDF]

, 2009
We have investigated the 2D 2-point correlation function, ƐAG, between low column density Lya absorbers and galaxies at a redshift z ~ 1 for the first time.
Shone, Allen Maurice
core  

Integral-Field Spectroscopy of High-Redshift Galaxies: Implications for Early Galaxy Evolution [PDF]

, 2006
Several lines of evidence suggest that the most active phase of galaxy evolution, especially in the most massive systems, was largely completed by $z\sim 1$.
Nesvadba, Nicole
core   +1 more source