Diffuse Cosmic Gamma Radiation Measured by<i>HEAO 1</i>

Kinzer, R. L.; Jung, G. V.; Gruber, D. E.; Matteson, J. L.; Peterson, and L. E.

doi:10.1086/303507

Cited by 95 publications

(90 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The fact that the appearance of an additional cover in the detector aperture could affect the measurements at energies above several hundred keV was demonstrated in laboratory experiments (for a description, see Kinzer et al 1997). To reduce the influence of this effect, not only a passive shield blocking the aperture but also an active shield was used in some experiments.…”

Section: Blocking the Aperture By An Active Shieldmentioning

confidence: 99%

Measurements of the cosmic X-ray background of the Universe and the MVN experiment

Revnivtsev

2014

Astron. Lett.

View full text Add to dashboard Cite

-The paper describes previous studies of the cosmic X-ray background (CXB) of the Universe in the energy range 1-100 keV and outline prospects for its investigation with the help of MVN (Monitor Vsego Neba) experiment. The nature of the CXB and its use for studying the cosmological evolution of black holes are briefly discussed. The bulk of the paper is devoted to the methods of CXB measurements, from the first pioneering rocket and balloon-borne experiments to the measurements made with latestgeneration orbital X-ray observatories. Particular attention is given to the problems of allowance for the contribution of background events to the measurements with X-ray and hard X-ray instruments.

show abstract

Section: Blocking the Aperture By An Active Shieldmentioning

confidence: 99%

Measurements of the cosmic X-ray background of the Universe and the MVN experiment

Revnivtsev

2014

Astron. Lett.

View full text Add to dashboard Cite

show abstract

“…Observational limits on such imprints from instruments such as HEAO [53], COMPTEL [54], XMM, and Chandra [55] therefore impose additional constraints on the parameter space of our bulk-axion DDM model. As discussed in Sect.…”

Section: G Axion Decays and Contributions To The Diffuse X-ray And Gmentioning

confidence: 99%

“…Over this entire energy range, the diffuse photon spectrum is well-modeled by a set of power-law fits, and the non-observation of any discernible, sharp features in this spectrum imposes constraints on late relic-particle decays to photons. For the data from the COMPTEL instrument, the best power-law fit is found to be [54] dn γ dE γ = 10.5 × 10 −4 E γ 5 MeV while the best fit to the HEAO data is found to be [53] dn The Chandra satellite has improved upon these diffuse X-ray background constraints in the 1 keV E γ 8 keV range by resolving a large fraction (∼ 80%) of this background into point sources. The residual spectrum in this region is well represented by the power law [59] dn γ dE γ = 2.6 × 10 3 E γ keV −1.5…”

Section: G Axion Decays and Contributions To The Diffuse X-ray And Gmentioning

confidence: 99%

Phenomenological constraints on axion models of dynamical dark matter

Thomas

2012

Phys. Rev. D

View full text Add to dashboard Cite

In two recent papers [1,2] we introduced "dynamical dark matter" (DDM), a new framework for dark-matter physics in which the requirement of stability is replaced by a delicate balancing between lifetimes and cosmological abundances across a vast ensemble of individual dark-matter components whose collective behavior transcends that normally associated with traditional darkmatter candidates. We also presented an explicit model involving axions in large extra spacetime dimensions, and demonstrated that this model has all of the features necessary to constitute a viable realization of the general DDM framework. In this paper, we complete our study by performing a general analysis of all phenomenological constraints which are relevant to this bulk-axion DDM model. Although the analysis in this paper is primarily aimed at our specific DDM model, many of our findings have important implications for bulk axion theories in general. Our analysis can also serve as a prototype for phenomenological studies of theories in which there exist large numbers of interacting and decaying particles.

show abstract

“…A 40 K calibration source was modeled inside the cryostat and was fitted to the measured data only at the 1.46 MeV line. The cosmic diffuse gamma-ray background was from the HEAO 1 A4 experiment [8]. This flux is also folded through the open collimator response and the response to shield leakage.…”

Section: Introductionmentioning

confidence: 99%