Results 81 to 90 of about 21,097,663 (248)
Precession of timelike bound orbits in Kerr spacetime
European Physical Journal C: Particles and Fields, 2021 Astrometric observations of S-stars provide a unique opportunity to probe the nature of Sagittarius-A* (Sgr-A*). In view of this, it has become important to understand the nature and behavior of timelike bound trajectories of particles around a massive ...
Parth Bambhaniya +5 more
doaj +1 more source
Masses and shadows of the black holes Sagittarius A* and M87* in modified gravity [PDF]
Physical Review D, 2019 We present calculations for the anticipated shadow sizes of Sgr A* and the supermassive black hole in the galaxy M87 in the context of the MOG modified theory of gravity (also known as Scalar-Tensor-Vector-Gravity, or STVG).
J. Moffat, V. Toth
semanticscholar +1 more source
Chemical Cartography of the Sagittarius Stream with Gaia
The Astrophysical JournalThe stellar stream connected to the Sagittarius (Sgr) dwarf galaxy is the most massive tidal stream that has been mapped in the Galaxy, and is the dominant contributor to the outer stellar halo of the Milky Way (MW).
Emily C. Cunningham +7 more
doaj +1 more source
8.3. Submillimeter polarimetry of Sagittarius A [PDF]
Symposium - International Astronomical Union, 1998 We present the first submillimeter polarimetric observations of Sagittarius A.
G. Novak +5 more
openaire +1 more source
Exploring Sagittarius A* in gamma-rays with Fermi LAT Telescope [PDF]
, 2021 Fabio Cafardo
openalex +1 more source
Mapping Observations of Peptide-like Molecules around Sagittarius B2
The Astrophysical JournalPeptide-like molecules, which have a close connection with the origin of life, have been detected in the Universe. Mapping observations of HCONH _2 and CH _3 CONH _2 , two of the simplest peptide-like molecules, are performed toward the Sagittarius B2 ...
Siqi Zheng +9 more
doaj +1 more source
Protostellar Cores in Sagittarius B2 N and M
The Astrophysical JournalWe present 500 and 700 au resolution 1 and 3 mm Atacama Large Millimeter/submillimeter Array observations, respectively, of protostellar cores in protoclusters Sagittarius B2 (Sgr B2) North (N) and Main (M), parts of the most actively star-forming cloud ...
Nazar Budaiev +8 more
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Dynamical Inference from Polarized Light Curves of Sagittarius A*
The Astrophysical JournalPolarimetric light curves of Sagittarius A* (Sgr A*) sometimes exhibit loops in the Stokes Q and U plane over time, often interpreted as orbiting hotspot motion. In this work, we apply the differential geometry of planar curves to develop a new technique
Angelo Ricarte +5 more
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Sagittarius A * High-energy X-Ray Flare Properties during NuStar Monitoring of the Galactic Center from 2012 to 2015 [PDF]
, 2017 Understanding the origin of the flaring activity from the Galactic center supermassive black hole Sagittarius A* is a major scientific goal of the NuSTAR Galactic plane survey campaign.
Shuo Zhang +19 more
semanticscholar +1 more source
Tomographic Imaging of the Sagittarius Spiral Arm's Magnetic Field Structure
The Astrophysical JournalThe Galactic global magnetic field is thought to play a vital role in shaping Galactic structures such as spiral arms and giant molecular clouds. However, our knowledge of magnetic field structures in the Galactic plane at different distances is limited,
Yasuo Doi +18 more
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