Results 21 to 30 of about 2,697 (212)
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
doaj +1 more source
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
Graellsia, 2022 Se han examinado dos cuantiosas colecciones de Cylindroiulus (una del País Vasco y Navarra y otra de Andalucía), y se han suplementado con otras, más pequeñas, de otras áreas de España; en total se han encontrado 10 especies. Se han descrito tres nuevas
Helen J. Read
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
Deformed black hole in Sagittarius A [PDF]
Physical Review D, 2021 We analyze the post-Newtonian orbit of stars around a deformed Kerr black hole. The deformation we consider is a class of disformal transformations of a nontrivial Kerr solution in scalar-tensor theory which are labeled via the disformal parameter $D$. We study different limits of the disformal parameter, and compare the trajectories of stars orbiting ...
T. Anson, E. Babichev, C. Charmousis
openaire +4 more sources
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
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
The extreme luminosity states of Sagittarius A* [PDF]
Astronomy and Astrophysics, 2010 We discuss mm-wavelength radio, 2.2-11.8um NIR and 2-10 keV X-ray light curves of the super massive black hole (SMBH) counterpart of Sagittarius A* (SgrA*) near its lowest and highest observed luminosity states. The luminosity during the low state can be interpreted as synchrotron emission from a continuous or even spotted accretion disk.
Devaky Kunneriath +16 more
openaire +3 more sources
A Dynamically Distinct Stellar Population in the Leading Arm of the Sagittarius Stream
The Astrophysical Journal Letters, 2023 We present a chemical and dynamical analysis of the leading arm (LA) and trailing arm (TA) of the Sagittarius (Sgr) stream, as well as for the Sgr dwarf galaxy core (SC), using red giant branch, main-sequence, and RR Lyrae stars from large spectroscopic ...
Gwibong Kang +3 more
doaj +1 more source
, 2018 Published as part of Bhattarai, Santosh, Pokheral, Chiranjibi Prasad, Lamichhane, Babu Ram, Regmi, Uba Raj, Ram, Ashok Kumar & Subedi, Naresh, 2018, Amphibians and reptiles of Parsa National Park, Nepal, pp.
Bhattarai, Santosh +5 more
openaire +2 more sources