Results 1 to 10 of about 44,448 (51)
Constraining a Companion of the Galactic Center Black Hole Sgr A*
The Astrophysical Journal, 2023 We use 23 yr of astrometric and radial velocity data on the orbit of the star S0-2 to constrain a hypothetical intermediate-mass black hole orbiting the massive black hole Sgr A* at the Galactic center.
Clifford M. Will +6 more
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CEERS Key Paper. III. The Diversity of Galaxy Structure and Morphology at z = 3–9 with JWST
The Astrophysical Journal Letters, 2023 We present a comprehensive analysis of the evolution of the morphological and structural properties of a large sample of galaxies at z = 3–9 using early James Webb Space Telescope (JWST) CEERS NIRCam observations. Our sample consists of 850 galaxies at z
Jeyhan S. Kartaltepe +61 more
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On the Distances to the X-Ray Binaries Cygnus X-3 and GRS 1915+105
The Astrophysical Journal, 2023 In this paper we significantly improve estimates of distance to the X-ray binary systems Cyg X-3 and GRS 1915+105. We report a highly accurate trigonometric parallax measurement for Cyg X-3 using the Very Long Baseline Array at 43 GHz, placing the source
M. J. Reid, J. C. A. Miller-Jones
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Numerical Testing of Mirror Diffusion of Cosmic Rays
The Astrophysical Journal Letters, 2023 The tension between recent observations and theories on cosmic-ray (CR) diffusion necessitates exploration of new CR diffusion mechanisms. We perform the first numerical study on the mirror diffusion of CRs that is recently proposed by Lazarian & Xu.
Chao Zhang, Siyao Xu
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The Astrophysical Journal, 2023 We present the first spatially resolved maps of gas-phase metallicity for two dust-obscured star-forming galaxies at z ∼ 4, from the JWST TEMPLATES Early Release Science program, derived from NIRSpec integral field unit spectroscopy of the H α and [N ii ]
Jack E. Birkin +25 more
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Edge-on Low-surface-brightness Galaxy Candidates Detected from SDSS Images Using YOLO
The Astrophysical Journal Supplement Series, 2023 Low-surface-brightness galaxies (LSBGs), fainter members of the galaxy population, are thought to be numerous. However, due to their low surface brightness, the search for a wide-area sample of LSBGs is difficult, which in turn limits our ability to ...
Yongguang Xing +9 more
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Finding Multiply Lensed and Binary Quasars in the DESI Legacy Imaging Surveys
The Astrophysical Journal Supplement Series, 2023 The time delay between multiple images of strongly lensed quasars is a powerful tool for measuring the Hubble constant ( H _0 ). To achieve H _0 measurements with higher precision and accuracy using the time delay, it is crucial to expand the sample of ...
C. Dawes +6 more
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A New Covariant Formalism for Kinetic Plasma Simulations in Curved Spacetimes
The Astrophysical Journal Letters, 2023 Low-density plasmas are characterized by a large-scale separation between the gyromotion of particles around local magnetic fields and the macroscopic scales of the system, often making global kinetic simulations computationally intractable.
Tyler Trent +4 more
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The Astrophysical Journal, 2023 A first look is taken at the NIRSpec 1–5 μ m observations from James Webb Space Telescope program 1591 that targets seven objects along the low-mass stellar life cycle with polycyclic aromatic hydrocarbon (PAH) emission.
C. Boersma +8 more
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Correlation plots of the Siberian Radioheliograph
Solar-Terrestrial Physics, 2017 The Siberian Solar Radio Telescope [Grechnev et al., 2011] is now being upgraded. The upgrading is aimed at providing the aperture synthesis imaging in the 4–8 GHz frequency range [Lesovoi et al., 2011, 2014] instead of the single-frequency direct ...
Lesovoi S.V., Kobets V.S.
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