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Observations with the Fermi Gamma-Ray Space Telescope reveal an excess of extended gamma-ray emission likely caused by an undiscovered population of millisecond pulsars (MSPs) in the core of the Sagittarius dwarf spheroidal galaxy (Sgr…

高能天体物理现象 · 物理学 2024-10-24 Lucia Gebauer-Werner , Oscar Macias , Christoph Weniger

We study the potential of the Square Kilometre Array in the first phase (SKA1) in detecting dark matter annihilation signals from dwarf spheroidals in the form of diffuse radio synchrotron. Taking the minimal supersymmetric standard model…

高能物理 - 唯象学 · 物理学 2019-02-06 Arpan Kar , Sourav Mitra , Biswarup Mukhopadhyaya , Tirthankar Roy Choudhury

This paper describes the use of the Murchison Widefield Array, a low-frequency radio telescope at a radio-quiet Western Australian site, as a radar receiver forming part of a continent-spanning multistatic radar network for the surveillance…

信号处理 · 电气工程与系统科学 2022-06-07 Brendan Hennessy , Robert Young , Steven Tingay , Ashley Summers , Daniel Gustainis , Brian Crosse , Marcin Sokolowski

The Auger Engineering Radio Array (AERA) aims at the detection of air showers induced by high-energy cosmic rays. As an extension of the Pierre Auger Observatory, it measures complementary information to the particle detectors, fluorescence…

高能天体物理现象 · 物理学 2019-08-13 Ewa M. Holt

The Askaryan Radio Array (ARA) is an ultrahigh energy (UHE) neutrino detector at the South Pole, designed to search for radio pulses emitted by neutrino-initiated particle showers in ice. ARA consists of an array of five autonomous stations…

高能天体物理现象 · 物理学 2025-09-23 Marco Stein Muzio

We detail and present results from a pilot study to assess the feasibility of detecting molecular lines at low radio frequencies. We observed a 400 square degree region centred on the Galactic Centre with the Murchison Widefield Array (MWA)…

We have extended our previous work to use the Murchison Widefield Array (MWA) as a non-coherent passive radar system in the FM frequency band, using terrestrial FM transmitters to illuminate objects in Low Earth Orbit LEO) and the MWA as…

天体物理仪器与方法 · 物理学 2020-12-16 Steve Prabu , Paul J Hancock , Zhang Xiang , Steven J Tingay

The recently discovered stellar system, Ursa Major III/UNIONS 1, may be the faintest and densest dwarf spheroidal satellite galaxy of the Milky Way. Owing to its close proximity and substantial dark matter (DM) component, Ursa Major III…

高能物理 - 唯象学 · 物理学 2024-09-20 Peng-Long Zhang , Xiao-Jun Bi , Qin Chang , Peng-Fei Yin , Yi Zhao

Scintillating fibre detectors combine sub-mm resolution particle tracking, precise measurements of the particle stopping power and sub-ns time resolution. Typically, fibres are read out with silicon photomultipliers (SiPM). Hence, if fibres…

The Square Kilometre Array (SKA) will be both the largest radio telescope ever constructed and the largest Big Data project in the known Universe. The first phase of the project will generate on the order of 5 zettabytes of data per year. A…

天体物理仪器与方法 · 物理学 2018-11-21 Jamie Farnes , Ben Mort , Fred Dulwich , Stef Salvini , Wes Armour

The Square Kilometer Array (SKA) is an international effort to build the world's largest radio telescope, with one square kilometer collecting area. Besides its ambitious scientific objectives, such as probing the cosmic dawn and cradle of…

仪器与探测器 · 物理学 2015-04-23 B. Wang , X. Zhu , C. Gao , Y. Bai , J. W. Dong , L. J. Wang

We present the first observational study of pulsars performed with the second-generation precursor stations to the low-frequency component of the Square Kilometre Array (SKA-Low): the Aperture Array Verification System 2 (AAVS2) and the…

高能天体物理现象 · 物理学 2022-09-28 C. P. Lee , N. D. R. Bhat , M. Sokolowski , N. A. Swainston , D. Ung , A. Magro , R. Chiello

I summarize the science drivers presented at the workshop for Phase I of the Square Kilometre Array: 'Advancing Astrophysics with the Square Kilometre Array'. I build from the historical perspective of the original Key Science programs:…

天体物理仪器与方法 · 物理学 2014-08-25 Christopher L. Carilli

The low-frequency radio telescope of the Square Kilometre Array (SKA-Low), currently under construction in the remote Murchison shire in the Western Australia's outback, will observe the sky between 50 MHz and 350 MHz with unprecedented…

One of the clearest signs of black hole activity is the presence of a compact radio core in the nuclei of galaxies. With the Square Kilometer Array (SKA) these cores can be used to study the evolution of black holes throughout the universe…

天体物理学 · 物理学 2009-11-10 H. Falcke , E. Koerding , N. M. Nagar

The Square Kilometre Array will be a revolutionary instrument for the study of gas in the distant Universe. SKA1 will have sufficient sensitivity to detect and image atomic 21 cm HI in individual galaxies at significant cosmological…

星系天体物理 · 物理学 2014-12-19 J. Wagg , E. Da Cunha , C. L. Carilli , F. Walter , M. Aravena , I. Heywood , J. Hodge , E. Murphy , D. Riechers , M. Sargent , R. Wang

An upgrade of the present IceCube surface array (IceTop) with scintillation detectors and possibly radio antennas is foreseen. The enhanced array will calibrate the impact of snow accumulation on the reconstruction of cosmic-ray showers…

天体物理仪器与方法 · 物理学 2019-06-12 Andreas Haungs

We characterize the low frequency radio-frequency interference (RFI) environment at the Murchison Radio-astronomy Observatory (MRO), the location selected for the low-frequency component of the Square Kilometre Array. Data were collected…

天体物理仪器与方法 · 物理学 2018-11-07 Marcin Sokolowski , Randall B. Wayth , Morgan Lewis