Cosmic Optical Background: The View From Pioneer 10/11

Matsuoka, Yoshiki; Ienaka, N.; Kawara, Kimiaki; Oyabu, Shinki

doi:10.1088/0004-637x/736/2/119

Cited by 106 publications

(158 citation statements)

References 44 publications

Supporting

Mentioning

137

Contrasting

Order By: Relevance

“…We clearly detect the linear correlations between S diffuse and S diffuse 100µm at the large S diffuse 100µm , and more importantly, the flattening of these relations at S diffuse 100µm < 0.8 MJy sr −1 in the both IPP bands. The inflection points are in very good agreement with the CIB brightness reported by Lagache et al (2000), which had been predicted in a Monte-Carlo simulation (Matsuoka et al 2011). Our estimates of the COB brightness are derived as the S diffuse values on the observed S diffuse -S diffuse 100µm linear correlations made by the DGL, at the point where 100 µm brightness equals to the CIB.…”

Section: Galactic Lightsupporting

confidence: 90%

“…The above facts indicate that bulk of the COB are comprised of normal galaxies, and there are little room for contributions of other populations at these wavelengths. (2007) and Matsuoka et al (2011). The solid line with arrows between 0.8 and 4 µm represent the upper limits reported by Aharonian et al (2006).…”

Section: Resultsmentioning

confidence: 93%

“…The integrated brightness of galaxies at the corresponding wavelengths are given by Madau & Pozzetti (2000) (triangles). Further details of this figure are described in Matsuoka et al (2011).…”

Section: Resultsmentioning

confidence: 99%

“…The possible systematic uncertainties were estimated by dividing the data into various subgroups with several criteria such as spacecrafts and heliocentric distances and comparing the sky maps created from each of them. The full description of the data reduction process is given in Matsuoka et al (2011) …”

Section: Observations and Reductionsmentioning

confidence: 99%

“…In order to overcome this long-standing 438 Y. Matsuoka et al problem of foreground removal, we made use of the imaging data obtained by the Imaging Photopolarimeters on board the Pioneer 10 and 11 spacecrafts (Matsuoka et al 2011). The method and obtained results are presented here.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Cosmic Optical Background: the view from Pioneer 10/11

et al. 2011

Self Cite

View full text Add to dashboard Cite

Abstract. We present the new constraints on the cosmic optical background (COB) obtained from an analysis of the Pioneer 10/11 Imaging Photopolarimeter (IPP) data. After careful examination of data quality, the usable measurements free from the zodiacal light are integrated into sky maps at the blue (∼0.44 µm) and red (∼0.64 µm) bands. Accurate starlight subtraction is achieved by referring to all-sky star catalogs and a Galactic stellar population synthesis model down to 32.0 mag. We find that the residual light is separated into two components: one component shows a clear correlation with thermal 100 µm brightness, while another betrays a constant level in the lowest 100 µm brightness region. Presence of the second component is significant after all the uncertainties and possible residual light in the Galaxy are taken into account, thus it most likely has the extragalactic origin (i.e., the COB). The derived COB brightness is (1.8 ± 0.9) × 10 −9 and (1.2 ± 0.9) × 10 −9 erg s −1 cm −2 sr −1Å−1 at the blue and red band, respectively, or 7.9 ± 4.0 and 7.7 ± 5.8 nW m −2 sr −1 . Based on a comparison with the integrated brightness of galaxies, we conclude that the bulk of the COB is comprised of normal galaxies which have already been resolved by the current deepest observations. There seems to be little room for contributions of other populations including "first stars" at these wavelengths. On the other hand, the first component of the IPP residual light represents the diffuse Galactic light (DGL)-scattered starlight by the interstellar dust. We derive the mean DGL-to-100 µm brightness ratios of 2.1 × 10 −3 and 4.6 × 10 −3 at the two bands, which are roughly consistent with the previous observations toward denser dust regions. Extended red emission in the diffuse interstellar medium is also confirmed.

show abstract

Section: Galactic Lightsupporting

confidence: 90%

Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Observations and Reductionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Cosmic Optical Background: the view from Pioneer 10/11

et al. 2011

Self Cite

View full text Add to dashboard Cite

show abstract

Students

Kruit¹

2014

Jacobus Cornelius Kapteyn

View full text Add to dashboard Cite

The extragalactic background light and the gamma-ray opacity of the universe

Dwek¹,

Krennrich²

2013

Astroparticle Physics

230

243

View full text Add to dashboard Cite

The extragalactic background light (EBL) is one of the fundamental observational quantities in cosmology. All energy releases from resolved and unresolved extragalactic sources, and the light from any truly diffuse background, excluding the cosmic microwave background (CMB), contribute to its intensity and spectral energy distribution. It therefore plays a crucial role in cosmological tests for the formation and evolution of stellar objects and galaxies, and for setting limits on exotic energy releases in the universe. The EBL also plays an important role in the propagation of very high energy γ−rays which are attenuated en route to Earth by pair producing γ − γ interactions with the EBL and CMB. The EBL affects the spectrum of the sources, predominantly blazars, in the ∼ 10 GeV to 10 TeV energy regime. Knowledge of the EBL intensity and spectrum will allow the determination of the intrinsic blazar spectrum in a crucial energy regime that can be used to test particle acceleration mechanisms and VHE γ−ray production models. Conversely, knowledge of the intrinsic γ−ray spectrum and the detection of blazars at increasingly higher redshifts will set strong limits on the EBL and its evolution. This paper reviews the latest developments in the determination of the EBL and its impact on the current understanding of the origin and production mechanisms of γ−rays in blazars, and on energy releases in the universe. The review concludes with a summary and future directions in Cherenkov Telescope Array techniques and in infrared ground-based and space observatories that will greatly improve our knowledge of the EBL and Preprint submitted to Astroparticle Physics the origin and production of very high energy γ−rays.

show abstract

Cosmic Optical Background: The View From Pioneer 10/11

Cited by 106 publications

References 44 publications

Cosmic Optical Background: the view from Pioneer 10/11

Cosmic Optical Background: the view from Pioneer 10/11

Students

The extragalactic background light and the gamma-ray opacity of the universe

Contact Info

Product

Resources

About