Results 51 to 60 of about 35,587 (387)
Abundances in Sagittarius: present state and perspectives for the use of VLT [PDF]
, 1999 Sagittarius, the nearest external galaxy, will be amenable to detailed abundance studies with VLT and other 8m class telescopes. Such data, in conjuction with the similar data of our own galaxy, will allow a deeper understanding of chemical evolution ...
Bonifacio, Piercarlo
core +3 more sources
On the dynamics of the Sagittarius dwarf galaxy [PDF]
Monthly Notices of the Royal Astronomical Society, 1995 We use numerical simulations to test the feasibility of the suggestion by Ibata et al. (1994) that the excess population of stars which they discovered in the Sagittarius region may be the disrupted remains of a dwarf spheroidal galaxy. We find that a Fornax-like model for the pre-disruption system can indeed reproduce the data.
Hector Velazquez, Simon D. M. White
openaire +2 more sources
The surprisingly small impact of magnetic fields on the inner accretion flow of Sagittarius A* fueled by stellar winds [PDF]
, 2020 We study the flow structure in 3D magnetohydrodynamic (MHD) simulations of accretion onto Sagittarius A* via the magnetized winds of the orbiting Wolf-Rayet stars.
S. Ressler, E. Quataert, J. Stone
semanticscholar +1 more source
Globular clusters in the Sagittarius stream [PDF]
Astronomy & Astrophysics, 2020 We reconsider the case for the association of Galactic globular clusters to the tidal stream of the Sagittarius dwarf spheroidal galaxy (Sgr dSph) using Gaia DR2 data. We used RR Lyrae variables to trace the stream in 6D and we selected clusters matching
M. Bellazzini +5 more
semanticscholar +1 more source
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
doaj +1 more source
Stellar orbits near Sagittarius A [PDF]
Monthly Notices of the Royal Astronomical Society, 2002 We present new SHARP/NTT stellar proper motion and accelaration data covering an interval from 1992 to 2000: 1) We combine the high precision but shorter time scale NIRC/Keck data with the lower precision but longer time scale SHARP/NTT data set; 2) We statistically correct the observed accelerations for geometrical projection effects; 3) We exclude ...
Reinhard Genzel +3 more
openaire +3 more sources
Galactic seismology: the evolving ‘phase spiral’ after the Sagittarius dwarf impact [PDF]
Monthly notices of the Royal Astronomical Society, 2020 In 2018, the ESA Gaia satellite discovered a remarkable spiral pattern (‘phase spiral’) in the z − Vz phase plane throughout the solar neighbourhood, where z and Vz are the displacement and velocity of a star perpendicular to the Galactic disc.
J. Bland-Hawthorn, T. Tepper-García
semanticscholar +1 more source
Flare emission from Sagittarius A* [PDF]
Journal of Physics: Conference Series, 2012 14 pages, 3 figures, Conf. Proc. The Central Kiloparsec in Galactic Nuclei; Astronomy at High Angular Resolution 2011 (AHAR2011), held 29.8.2011-2.9.2011 at the DPG Physikzentrum Bad Honnef (Cologne/Bonn ...
Jason Dexter +23 more
openaire +2 more sources
Footprints of the Sagittarius dwarf galaxy in the Gaia data set [PDF]
Monthly notices of the Royal Astronomical Society, 2018 We analyse an N-body simulation of the interaction of the Milky Way (MW) with a Sagittarius-like dSph (Sgr), looking for signatures which may be attributed to its orbital history in the phase space volume around the Sun in light of Gaia DR2 discoveries.
C. Laporte +3 more
semanticscholar +1 more source
Full 5D characterisation of the Sagittarius stream with Gaia DR2 RR Lyrae [PDF]
Astronomy & Astrophysics, 2020 Context. The Sagittarius (Sgr) stream is one of the best tools that we currently have to estimate the mass and shape of our Galaxy. However, assigning membership and obtaining the phase-space distribution of the stars that form the tails of the stream is
P. Ramos +6 more
semanticscholar +1 more source