Results 121 to 130 of about 3,773,384 (268)
A Proposal for Enhancing Technosignature Search toward the Galactic Center
The Astrophysical JournalWe discuss the possibility of enhancing intelligent life searches toward the Galactic center. From the clockwork orbital motions of stars around the Sgr A* black hole, we can determine the distance to the Galactic center at an exceptional accuracy ...
Naoki Seto
doaj +1 more source
Estimating the parameters of the Sgr A* black hole
, 2010 The measurement of relativistic effects around the galactic center may allow in the near future to strongly constrain the parameters of the supermassive black hole likely present at the galactic center (Sgr A*).
A. A. Nucita +39 more
core +1 more source
, 1998 G359.87+0.18 is an enigmatic object located 15' from Sgr A*. It has been variously classified as an extragalactic source, Galactic jet source, and young supernova remnant.
Anantharamaiah K. R. +22 more
core +2 more sources
The black hole at the Galactic Center: observations and models in a nutshell [PDF]
, 2017 The Galactic Center (Sgr A*) is a peculiar place in our Galaxy (Milky Way). Our Solar system is located at a distance around 8 kpc from the Galactic Center (GC).
A. Zakharov
semanticscholar +1 more source
High-energy tail of the Galactic Center gamma-ray excess [PDF]
, 2016 Observations by the Fermi-LAT have uncovered a bright, spherically symmetric excess surrounding the center of the Milky Way galaxy. The spectrum of the gamma-ray excess peaks sharply at an energy ~2 GeV, exhibiting a hard spectrum at lower energies, and ...
T. Linden +3 more
semanticscholar +1 more source
High energy emission from the Galactic Center: Theory and observations
EPJ Web of Conferences, 2015 Galactic Centre is a bright γ-ray source with the GeV-TeV band spectrum composed of two distinct components in the 1–10 GeV and 1–10 TeV energy ranges. The nature of the two components is not clearly understood.
Chernyakova M. +3 more
doaj +1 more source
The Galactic Center GeV excess from a series of leptonic cosmic-ray outbursts [PDF]
, 2015 It has been proposed that a recent outburst of cosmic-ray electrons could account for the excess of GeV-scale gamma rays observed from the region surrounding the Galactic Center.
I. Cholis +5 more
semanticscholar +1 more source
OUR GALACTIC CENTER – THE NEAREST BURNING DISK
Acta Polytechnica, 2013 This short presentation will update my more than 25 years long attempts at understandingthe actions of the Central Engine at our Galactic Center.
Wolfgang Kundt
doaj +1 more source
Star Formation at the Galactic Center
, 2009 Molecular clouds at the Galactic center (GC) have environments considerably different from their disk counterparts. The GC may therefore provide important clues about how the environment affects star formation.
Fatuzzo, Marco, Melia, Fulvio
core +1 more source
Multiwavelength Observations of Sgr A*. II. 2019 July 21 and 26
The Astrophysical JournalWe report on the final two days of a multiwavelength campaign of Sgr A* observing in the radio, submillimeter, infrared (IR), and X-ray bands in 2019 July. Sgr A* was remarkably active, showing multiple flaring events across the electromagnetic spectrum.
Joseph M. Michail +8 more
doaj +1 more source