Discovery of a new galactic center excess consistent with upscattered starlight

Abstract

We present a new extended gamma ray excess detected with the Fermi Satellite Large Area Telescope toward the Galactic Center that traces the morphology of infrared starlight emission. Combined with its measured spectrum, this new extended source is approximately consistent with inverse Compton emission from a high-energy electron-positron population with energies up to about 10 GeV. Previously detected emissions tracing the 20 cm radio, interpreted as bremsstrahlung radiation, and the Galactic Center Extended emission tracing a spherical distribution and peaking at 2 GeV, are also detected. We show that the inverse Compton and bremsstrahlung emissions are likely due to the same source of electrons and positrons. All three extended emissions may be explained within the framework of a model where the dark matter annihilates to leptons or a model with unresolved millisecond pulsars in the Galactic Center.

Scalar and tensor perturbations in loop quantum cosmology: high-order corrections

“…(5.15), could be within the range of the detection of the current and forthcoming cosmological experiments [39]. In addition, as we already pointed out in [32], the up bounds for δ(k0)…”

“…We obtain explicitly the analytical expressions of power spectra, spectral indices, and running of spectral indices up to the third-order approximation in terms of the parameters introduced in the uniform asymptotic approximation method. To this order, the upper error bounds are ≤ 0.15%, accurate enough for the current and forthcoming experiments [39]. These expressions are all descibed in terms of the slow-roll parameters (up to the secondorder) and the parameters which represent the holonomy and inverse-volume quantum gravitational corrections.…”

“…Therefore, if any corrections to n s and r lead to Γ n (n s , r) 10 −3 , they should be within the range of detection of the current and forthcoming observations [39].…”

“…Even with such tight constraints, the quantum gravitational effects due to the inverse-volume corrections of LQC can be within the range of the detection of the current and forthcoming cosmological experiments [39], provided that σ 1.…”

“…The results from Planck 2015 are n s = 0.968±0.006 and r 0.002 < 0.11(95% CL) [38], which yields n s 1. In the forthcoming experiments, specially the Stage IV ones, the errors of the measurements on both n s and r are σ(n s ), σ(r) ≤ 10 −3 [39], which implies the error of the measurement of Γ n (n s , r) is…”