Results 41 to 50 of about 21,097,663 (248)
The Proper Motion of Sagittarius A*. II. The Mass of Sagittarius A* [PDF]
The Astrophysical Journal, 2004 We report measurements with the Very Long Baseline Array (VLBA) of the position of Sgr A* with respect to two extragalactic radio sources over a period of 8 yr. The apparent proper motion of Sgr A* relative to J1745 283 is 6:379 0:024 mas yr 1 along a position angle of 209N60 0N18, almost entirely in the plane of the Galaxy.
M. J. Reid, A. Brunthaler
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Multiwavelength VLBI observations of Sagittarius A* [PDF]
Astronomy & Astrophysics, 2010 14pages, 14 Figures, Accepted for publication in A& ...
Lu, R. -S. +7 more
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THE EVENT HORIZON OF SAGITTARIUS A* [PDF]
The Astrophysical Journal, 2009 11 pages, 6 figures, submitted to ...
Broderick, Avery E. +2 more
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What Does the Milky Way Look Like?
The Astrophysical Journal, 2023 In spite of much work, the overall spiral structure morphology of the Milky Way remains somewhat uncertain. In the last two decades, accurate distance measurements have provided us with an opportunity to solve this issue.
Y. Xu +7 more
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International Journal of Antennas and Propagation, 2021 The low-orbit dual-satellite passive location system provides a cost-efficient and easy implementation platform, by which positions of unknown emitters on the Earth can be determined through measuring both the time and the frequency differences by two ...
Gang Li +3 more
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Neutrino lighthouse at Sagittarius A*
Physical Review D, 2014 We investigate whether a subset of high-energy events observed by IceCube may be due to neutrinos from Sagittarius A*. We check both spatial and temporal coincidences of IceCube events with other transient activities of Sagittarius A*. Among the seven IceCube shower events nearest to the galactic center, we have found that event 25 has a time very ...
Bai, Y. +5 more
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Testing the ALP-photon coupling with polarization measurements of Sagittarius A⋆ [PDF]
Journal of Cosmology and Astroparticle Physics, 2020 Ultra-light bosons such as axions or axion-like particles (ALPs), are promising candidates to solve the dark matter problem. A unique way to detect such ALPs is to search for the periodic oscillation feature of the position angles of linearly polarized ...
G. Yuan +7 more
semanticscholar +1 more source
A checklist of subfamily Scarabaeinae (Coleoptera: Scarabaeidae) from Cambodia
Journal of Asia-Pacific Biodiversity, 2021 The checklist of the subfamily Scarabaeinae from Cambodia is provided firstly in here, with distributional records of geographical ranges and record data in bibliography including Cambodia.
Gyu Young Han +2 more
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DIFFUSIVE COSMIC-RAY ACCELERATION IN SAGITTARIUS A* [PDF]
The Astrophysical Journal, 2012 Accepted for publication in ApJ ...
Fatuzzo, Marco, Melia, Fulvio
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Whiting 1: Confirmation of its accretion by the Milky Way
EPJ Web of Conferences, 2017 We investigate the association of Whiting 1 with the Sagittarius tidal stream by obtaining radial velocities for a sample of 101 stars observed with VIMOS.
Carballo-Bello Julio A. +6 more
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