Results 91 to 100 of about 3,773,384 (268)
Investigating the Relativistic Motion of the Stars Near the Supermassive Black Hole in the Galactic Center [PDF]
, 2017 The S-star cluster in the Galactic center allows us to study the physics close to a supermassive black hole, including distinctive dynamical tests of general relativity.
M. Parsa +9 more
semanticscholar +1 more source
A Possible Common Physics Picture Reflected by the Gamma-Ray Emission of the Galactic Center
The Astrophysical JournalLong-term observations of the Galactic center by Fermi and HESS have revealed a novel phenomenon: the high-energy gamma-ray spectrum from the gamma-ray source HESS J1745-290 exhibits a double power-law structure.
Lin Nie, Yi-Qing Guo, Si-Ming Liu
doaj +1 more source
Misaligned Jets from Sgr A* and the Origin of Fermi/eROSITA Bubbles
The Astrophysical Journal, 2023 One of the leading explanations for the origin of Fermi Bubbles is past jet activity in the Galactic center supermassive black hole Sgr A ^* . The claimed jets are often assumed to be perpendicular to the Galactic plane.
Kartick C. Sarkar +3 more
doaj +1 more source
A Disk in the Galactic Center in the Past? [PDF]
, 2006 We raise the question whether in the past a disk could have existed in our Galactic Center which has disappeared now. Our model for the interaction of a cool disk and a hot corona above (Liu et al. 2004) allows to estimate an upper limit for the mass that might have been present in a putative accretion disk after a last star forming event, but would ...
Emmi Meyer-Hofmeister +2 more
openaire +4 more sources
The Minispiral in the Galactic Center revisited [PDF]
New Astronomy, 2000 12 pages, 18 figures; submitted to New Astronomy; higher resolution version and two animations available via anonymous ftp ftp://ftp.ita.uni-heidelberg.de/pub/ITA/wjd ...
Wolfgang J. Duschl +2 more
openaire +4 more sources
, 2002 Using the EGRET data and an improved point source analysis, including an energy dependent point spread function and an unbinned maximum likelihood technique, we have been able to place considerably lower limits on the gamma ray flux from the galactic ...
Allanach +17 more
core +1 more source
Median Statistics Estimate of the Distance to the Galactic Center [PDF]
, 2017 We show that error distributions of a compilation of 28 recent independent measurements of the distance from the Sun to the Galactic center, R0, are wider than a standard Gaussian and best fit by an n = 4 Student’s t probability density function.
Tia Camarillo +3 more
semanticscholar +1 more source
The Position of Sagittarius A* at the Galactic Center
The Astrophysical Journal, 1999 11 pages, one figure and one table. ApJL (in press)
Farhad Yusef-Zadeh +2 more
openaire +3 more sources
The distance to the Galactic Center [PDF]
Proceedings of the International Astronomical Union, 2012 AbstractOne of the Milky Way's fundamental parameters is the distance of the Sun from the Galactic Center, R0. This article reviews the various ways of estimating R0, placing special emphasis on methods that have become possible recently. In particular, we focus on the geometric distance estimate made possible thanks to observations of individual ...
Tobias K. Fritz +5 more
openaire +1 more source
Dark matter interpretation of the Fermi-LAT observation toward the Galactic Center [PDF]
, 2016 Author(s): Karwin, Christopher; Murgia, Simona; Tait, Tim MP; Porter, Troy A; Tanedo, Philip | Abstract: The center of the Milky Way is predicted to be the brightest region of gamma-rays generated by self-annihilating dark matter particles.
C. Karwin +4 more
semanticscholar +1 more source