Results 51 to 60 of about 3,773,384 (268)
The Distance to the Galactic Center [PDF]
Publications of the Astronomical Society of the Pacific, 2000 AbstractThe Optical Gravitational Lensing Experiment (OGLE) data on high-amplitude δ Scuti Stars (HADS) and RR Lyrae stars have been analyzed to determine the distance to the galactic bulge. We find a mean value of 14.47 ± 0.08 mag for the bulge distance modulus.
J. B. Madsen +3 more
openaire +3 more sources
Are Supernovae Responsible for the Gamma Ray Spectrum from the Galactic Center?
Acta Polytechnica CTU Proceedings, 2014 We discuss the supernova remnants distribution as a function of the galactic longitude and compare their positions to that of the detected TeV gamma ray sources. A large fraction of these sources either coincide or a close by known supernova remnants. If
Todor Stanev
doaj +1 more source
Hunting for heavy winos in the Galactic Center [PDF]
Physical Review D, 2018 Observing gamma rays using ground-based atmospheric Cherenkov telescopes provides one of the only probes of heavy weakly interacting dark matter. A canonical target is the thermal wino, for which the strongest limits come from searches for photon lines ...
L. Rinchiuso +8 more
semanticscholar +1 more source
Measuring Fundamental Galactic Parameters with Stellar Tidal Streams and SIM PlanetQuest [PDF]
, 2005 Extended halo tidal streams from disrupting Milky Way satellites offer new opportunities for gauging fundamental Galactic parameters without challenging observations of the Galactic center.
Allyson A. Polak +7 more
core +1 more source
Calorimetric Dark Matter Detection with Galactic Center Gas Clouds. [PDF]
Physical Review Letters, 2018 We demonstrate that dark matter heating of gas clouds, hundreds of parsecs from the Milky Way Galactic Center, provides a powerful new test of dark matter interactions.
Amit Bhoonah +3 more
semanticscholar +1 more source
Highlights of Astronomy, 1992 AbstractThe dynamic subject of the Galactic center is driven mostly by high-resolution imaging both in the continuum and in the spectral line modes in a number of wavelength regimes. An attempt has been made to give a short overview of recent observations in this region, as follows: 1) Unusual characteristics of the population of molecular and dust ...
openaire +2 more sources
SciPost Physics Proceedings, 2023 After more than a decade since its discovery, the Galactic center gamma-ray excess - discovered with the Fermi Large Area Telescope - remains puzzling. While the spectrum of the signal can be explained by either dark matter or an unresolved population of
Oscar Macias, Martin Pohl, Chris Gordon, Phaedra Coleman
doaj +1 more source
Testing General Relativity with Stellar Orbits around the Supermassive Black Hole in Our Galactic Center. [PDF]
Physical Review Letters, 2017 We demonstrate that short-period stars orbiting around the supermassive black hole in our Galactic center can successfully be used to probe the gravitational theory in a strong regime. We use 19 years of observations of the two best measured short-period
A. Hees +16 more
semanticscholar +1 more source
The Dense Gas Fraction in Galactic Center Clouds [PDF]
Astrophysical Journal, 2018 We present an analysis of gas densities in the central R = 300 pc of the Milky Way, focusing on three clouds: GCM –0.02–0.07 (the 50 km s−1 cloud), GCM –0.13–0.08 (the 20 km s−1 cloud), and GCM 0.25+0.01 (the “Brick”).
E. Mills +7 more
semanticscholar +1 more source
Constraining the Stellar Mass Function in the Galactic Center via Mass Loss from Stellar Collisions
Advances in Astronomy, 2011 The dense concentration of stars and high-velocity dispersions in the Galactic center imply that stellar collisions frequently occur. Stellar collisions could therefore result in significant mass loss rates.
Douglas Rubin, Abraham Loeb
doaj +1 more source