Results 21 to 30 of about 157,868 (337)

Limits on Supersymmetric Dark Matter From EGRET Observations of the Galactic Center Region [PDF]

, 2002
In most supersymmetic models, neutralino dark matter particles are predicted to accumulate in the Galactic center and annihilate generating, among other products, gamma rays.
A. Balbi, A. J. Buras, Brenda L. Dingus, Dan Hooper, H. A. Mayer-Hasselwander, J. A. Esposito, J. R. Ellis, K. G. Begeman, L. J. Hall, M. Pohl, P. Gondolo   +10 more
core   +2 more sources

Dark matter annihilation at the galactic center [PDF]

, 1999
If cold dark matter is present at the galactic center, as in current models of the dark halo, it is accreted by the central black hole into a dense spike.
A. Eckart, A. Eckart, A. M. Ghez, A. V. Kravtsov, B. Moore, G. D. Quinlan, H. Adarkar, H. S. Zhao, J. Binney, J. Edsjö, J. F. Navarro, Joseph Silk, K. Nakamura, L. Bergström, L. Bergström, L. Bergström, L. Bergström, N. W. Evans, P. Ullio, Paolo Gondolo, R. Svoboda, S. Dimopoulos, W. Dehnen, Y. Oyama, Z. Bern   +24 more
core   +2 more sources

Improved Galactic diffuse emission model strengthens the case for a Millisecond Pulsar explanation of the Fermi GeV excess

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

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

First Results from SPARO: Evidence for Large-Scale Toroidal Magnetic Fields in the Galactic Center

, 2001
We have observed the linear polarization of 450 micron continuum emission from the Galactic center, using a new polarimetric detector system that is operated on a 2 m telescope at the South Pole.
D. Pernic, D. T. Chuss, G. Novak, G. S. Griffin, J. B. Peterson, J. L. Dotson, M. G. Newcomb, R. F. Loewenstein, Shibata K., T. Renbarger   +9 more
core   +1 more source

Proper Motions of Ionized Gas at the Galactic Center: Evidence for Unbound Orbiting Gas [PDF]

, 1998
We present radio continuum observations of the spiral-shaped ionized feature (Sgr A West) within the inner pc of the Galactic center at three epochs spanning 1986 to 1995.
D. A. Roberts, Eckart A., Ekers R. D., F. Yusef-Zadeh, J. Biretta   +4 more
core   +2 more sources

Toward Measuring the Microlensing Event Rate in the Galactic Center. I. Event Detection from the UKIRT Microlensing Survey Data

The Astrophysical Journal Supplement Series, 2023
To overcome the high optical extinction, near-infrared (NIR) observations are needed for probing the microlensing events toward the Galactic center. The 2015–2019 UKIRT microlensing survey toward the Galactic center is the first dedicated precursor NIR ...
Yongxin Wen, Weicheng Zang, Bo Ma
doaj   +1 more source

Metal-poor hypervelocity star candidates from the Sloan Digital Sky Survey

, 2011
Hypervelocity stars are believed to be ejected out from the Galactic center through dynamical interactions of (binary) stars with the central massive black hole(s).
Abadi, Bartko, Blaauw, Bromley, Brown, Brown, Dong, Edelmann, Gnedin, Gould, Ivezić, Kenyon, Kiziltan, Kollmeier, Kollmeier, Koposov, Lee, Lu, Lu, Merritt, Munn, Perets, Perets, Poveda, Rastegaev, Sesana, Teyssier, Williams, Xue, York, Yu, Zhang   +31 more
core   +1 more source

HOCO+ toward the Galactic Center [PDF]

, 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, Minh, Young Chol, Miyazaki, Atsushi   +2 more
core   +2 more sources

The Galactic Center in Color: Measuring Extinction with High-proper-motion Stars

The Astronomical Journal
The Milky Way’s central parsec is a highly extinguished region with a population of high-proper-motion stars. We have tracked 145 stars for ∼10 yr at wavelengths between 1 and 4 μ m to analyze extinction effects in color–magnitude space. Approximately 30%
Zoë Haggard, Andrea M. Ghez, Shoko Sakai, Abhimat K. Gautam, Tuan Do, Jessica R. Lu, Matthew Hosek, Mark R. Morris, Sean Granados   +8 more
doaj   +1 more source