Results 61 to 70 of about 46,290 (218)

A Glimpse of Satellite Galaxies in the Milky Way with the 2.5 m Wide Field Survey Telescope (WFST): Boötes III and Draco

The Astrophysical Journal
We carry out deep imaging of the Milky Way satellite galaxies, Boötes III and Draco, with the Wide Field Survey Telescope (WFST) as one pilot observing program to demonstrate the capability of WFST. Combining catalogs with PS1 DR2 and Gaia DR3, we derive
Chao Yang, Zhizheng Pan, Min Fang, Xian Zhong Zheng, Binyang Liu, Guoliang Li, Tian-Rui Sun, Ji-An Jiang, Miaomiao Zhang, Zhen Wan, Shuang Liu, Han Qu, Ji Yang, Xu Kong, Wenhao Liu, Yiping Shu, Jiang Chang, Tinggui Wang, Lulu Fan, Yongquan Xue, Wentao Luo, Hongxin Zhang, Zheng Lou, Haibin Zhao, Bin Li, Hairen Wang, Dazhi Yao, Jian Wang, Hongfei Zhang, Feng Li, Hao Liu, Ming Liang, Jinlong Tang, Yuheng Zhang, Man Qiao, Run Wen, Zongfei Lyu   +36 more
doaj   +1 more source

The DESI Bright Galaxy Survey: Final Target Selection, Design, and Validation

The Astronomical Journal, 2023
Over the next 5 yr, the Dark Energy Spectroscopic Instrument (DESI) will use 10 spectrographs with 5000 fibers on the 4 m Mayall Telescope at Kitt Peak National Observatory to conduct the first Stage IV dark energy galaxy survey.
ChangHoon Hahn, Michael J. Wilson, Omar Ruiz-Macias, Shaun Cole, David H. Weinberg, John Moustakas, Anthony Kremin, Jeremy L. Tinker, Alex Smith, Risa H. Wechsler, Steven Ahlen, Shadab Alam, Stephen Bailey, David Brooks, Andrew P. Cooper, Tamara M. Davis, Kyle Dawson, Arjun Dey, Biprateep Dey, Sarah Eftekharzadeh, Daniel J. Eisenstein, Kevin Fanning, Jaime E. Forero-Romero, Carlos S. Frenk, Enrique Gaztañaga, Satya Gontcho A Gontcho, Julien Guy, Klaus Honscheid, Mustapha Ishak, Stéphanie Juneau, Robert Kehoe, Theodore Kisner, Ting-Wen Lan, Martin Landriau, Laurent Le Guillou, Michael E. Levi, Christophe Magneville, Paul Martini, Aaron Meisner, Adam D. Myers, Jundan Nie, Peder Norberg, Nathalie Palanque-Delabrouille, Will J. Percival, Claire Poppett, Francisco Prada, Anand Raichoor, Ashley J. Ross, Sasha Gaines, Christoph Saulder, Eddie Schlafly, David Schlegel, David Sierra-Porta, Gregory Tarle, Benjamin A. Weaver, Christophe Yèche, Pauline Zarrouk, Rongpu Zhou, Zhimin Zhou, Hu Zou   +59 more
doaj   +1 more source

Antimatter Gravity and the Results of the ALPHA‐g Experiment

Annalen der Physik, Volume 536, Issue 7, July 2024.
The recent results of the ALPHA‐g experiment, which show gravitational attraction between antihydrogen atoms and the Earth, seem to undermine the success of repulsive‐gravity models in the cosmological field. Analyzing the theory of CPT gravity, two solutions are found that are consistent with the experimental results, while preserving the large‐scale ...
Massimo Villata
wiley   +1 more source

Aliasing from Galactic Plane Setting in Widefield Radio Interferometry

The Astrophysical Journal
Measurements with widefield radio interferometers often include the near-infinite gradient between the sky and the horizon. This causes aliasing inherent to the measurement itself and is purely a consequence of the Fourier basis.
N. Barry, J. L. B. Line, C. R. Lynch, M. Kriele, J. Cook   +4 more
doaj   +1 more source

A Large-scale Kinematic Study of Molecular Gas in High-z Cluster Galaxies: Evidence for High Levels of Kinematic Asymmetry

The Astrophysical Journal, 2023
We investigate the resolved kinematics of the molecular gas, as traced by the Atacama Large Millimeter/submillimeter Array in CO (2−1), of 25 cluster member galaxies across three different clusters at a redshift of z ∼ 1.6.
W. J. Cramer, A. G. Noble, K. Massingill, J. Cairns, D. L. Clements, M. C. Cooper, R. Demarco, J. Matharu, M. McDonald, A. Muzzin, J. Nantais, G. Rudnick, H. Übler, E. van Kampen, T. M. A. Webb, G. Wilson, H. K. C. Yee   +16 more
doaj   +1 more source

Probing extreme black‐hole outflows on short timescales via high spectral‐resolution x‐ray imagers

Astronomische Nachrichten, Volume 345, Issue 6-7, July-August 2024.
Abstract We investigate outflows and the physics of super‐Eddington versus sub‐Eddington regimes in black hole systems. Our focus is on prospective science using next‐generation high‐resolution soft x‐ray instruments. We highlight the properties of black hole ultraluminous x‐ray source (ULX) systems in particular. Owing to scale invariance in accreting
C. Pinto, J. F. Steiner, A. Bodaghee, P. Chakraborty, M. Sobolewska, D. R. Pasham, A. Ogorzalek, J. Zuhone, A. Bogdan, M. Vogelsberger   +9 more
wiley   +1 more source

Mapping the Filamentary Nebula of NGC 1275 with Multiwavelength SITELLE Observations

The Astronomical Journal
The filamentary nebula encompassing the central galaxy of the Perseus Cluster, NGC 1275, is a complex structure extending dozens of kiloparsecs from NGC 1275.
Carter Lee Rhea, Julie Hlavacek-Larrondo, Marie-Lou Gendron-Marsolais, Benjamin Vigneron, Megan Donahue, Auriane Thilloy, Laurie Rousseau-Nepton, Mar Mezcua, Norbert Werner, Jorge Barrera-Ballesteros, Hyunseop Choi, Alastair Edge, Andrew Fabian, G. Mark Voit   +13 more
doaj   +1 more source

Multi-messenger aspects of cosmic neutrinos*

EPJ Web of Conferences, 2016
The recent observation of TeV-PeV neutrinos by IceCube has opened a new window to the high-energy Universe. I will discuss this signal in the context of multi-messenger astronomy.
Ahlers Markus
doaj   +1 more source

Active Galactic Nuclei: Jets as the Source of Hadrons and Neutrinos

Acta Polytechnica CTU Proceedings, 2014
Active galactic nuclei are extragalactic sources, and their relativistic hot-plasma jets are believed to be the main candidates of the cosmic-ray origin, above the so-called knee region of the cosmic-ray spectrum.
Athina Meli, Paolo Ciarcelluti
doaj   +1 more source

Molecules in galaxies

, 2007
The main achievements, current developments and prospects of molecular studies in external galaxies are reviewed. They are put in the context of the results of several decades of studies of molecules in local interstellar medium, their chemistry and ...
Omont, Alain
core   +2 more sources