Results 11 to 20 of about 3,761,627 (366)
Proceedings of the International Astronomical Union, 2007 In the past decade high resolution measurements in the infrared employing adaptive optics imaging on 10m telescopes have allowed determining the three dimensional orbits stars within ten light hours of the compact radio source at the center of the Milky ...
Genzel, R., Karas, V.
core +2 more sources
Stellar Populations in the Galactic Center [PDF]
, 2013 We discuss the stellar content of the Galactic Center, and in particular, recent estimates of the star formation rate (SFR). We discuss pros and cons of the different stellar tracers and focus our attention on the SFR based on the three classical ...
A Stolte +79 more
core +4 more sources
The Galactic Center Weather Forecast [PDF]
The Astrophysical Journal, 2012 In accretion-based models for Sgr A* the X-ray, infrared, and millimeter emission arise in a hot, geometrically thick accretion flow close to the black hole.
Dolence, Joshua C. +3 more
core +3 more sources
BlackHoleCam: Fundamental physics of the galactic center [PDF]
International Journal of Modern Physics D, 2016 Einstein’s General theory of relativity (GR) successfully describes gravity. Although GR has been accurately tested in weak gravitational fields, it remains largely untested in the general strong field cases. One of the most fundamental predictions of GR
C. Goddi +39 more
semanticscholar +14 more sources
HOCO+ toward the Galactic Center [PDF]
Publications of the Astronomical Society of Japan, 2006 We have identified a weak thermal line U42.767, which has been detected only in the directions toward Sgr A and Sgr B2, as the HOCO+ 2_{02}--1_{01} transition.
Deguchi, Shuji +2 more
core +6 more sources
Electrodynamics at Galactic Center [PDF]
Symposium - International Astronomical Union, 1989 Molecular clouds moving at Keplerian velocities can induce strong electric fields in ionized regions near the galactic center. The induced field can drive currents over equivalent circuits ~ 100 pc. along the highly ordered magnetic fields, B ~ 10−3G.
Gregory Benford
openalex +3 more sources
Foreground mismodeling and the point source explanation of the Fermi Galactic Center excess [PDF]
Physical Review D, 2020 The Fermi Large Area Telescope has observed an excess of $\ensuremath{\sim}\mathrm{GeV}$ energy gamma rays from the center of the Milky Way, which may arise from near-thermal dark matter annihilation.
M. Buschmann +6 more
semanticscholar +1 more source
Symposium - International Astronomical Union, 1981 Recent infrared and radio observations of the Galactic Center are reviewed. For the region between 1 and 100 pc most of the observed phenomena can be explained by a large density of late-type stars, a ring of molecular material, and a number of regions of active star formation. The central parsec (Sgr A) appears to be a unique region of activity in the
Ian Gatley, E. E. Becklin
openaire +1 more source
A geometric distance measurement to the Galactic center black hole with 0.3% uncertainty [PDF]
Astronomy & Astrophysics, 2019 We present a 0.16% precise and 0.27% accurate determination of R0, the distance to the Galactic center. Our measurement uses the star S2 on its 16-year orbit around the massive black hole Sgr A* that we followed astrometrically and spectroscopically for ...
R. Abuter +53 more
semanticscholar +1 more source
Strong constraints on thermal relic dark matter from Fermi-LAT observations of the Galactic Center [PDF]
, 2020 The extended excess toward the Galactic Center (GC) in gamma rays inferred from Fermi-LAT observations has been interpreted as being due to dark matter (DM) annihilation.
K. Abazajian +4 more
semanticscholar +1 more source