First Star Signature in Infrared Background Anisotropies

Cooray, Asantha; Bock, J. J.; Keatin, Brian; Lange, A. E.; Matsumoto, Toshio

doi:10.1086/383137

Cited by 107 publications

(105 citation statements)

References 57 publications

(97 reference statements)

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“…• 5 and its spectral energy distribution (SED) should be cutoff due to the Lyman break at wavelengths 1[(1 + z)/10] μm (Cooray et al 2004;Kashlinsky et al 2004). Present measurements of the mean CIB levels are based on the DIRBE and IRTS data and suggest a substantial excess over the contribution from known galaxy populations (Dwek & Arendt 1998;Gorjian et al 2001;Arendt & Dwek 2003;Matsumoto et al 2005).…”

Section: No 1 2010 Cib Fluctuations In Deep Spitzer Irac Images 11mentioning

confidence: 98%

“…It is now thought that the first stars were very massive (see review by Bromm & Larson 2004), in which case theoretical models indicate they may produce a detectable contribution to the mean level of the near-IR CIB (Santos et al 2002;Salvaterra & Ferrara 2003;Kashlinsky 2005b;Fernandez & Komatsu 2005). They are also expected to have left a measurable imprint in CIB anisotropies (Cooray et al 2004;Kashlinsky et al 2004). The intuitive reasons why these fluctuations would be significant are (1) if massive, such stars would emit at light to mass ratios ∼10 4 -10 5 higher than the present-day stellar populations leading to significant CIB flux levels; (2) assuming that the Pop III era occupied a comparatively narrow epoch in time (say Δt ∼ a few hundred million years) there should be a higher amplitude of relative CIB fluctuations (∝ 1/ √ Δt); and (3) it is expected that within the framework of the concordance ΛCDM model the first stars formed out of rare high peaks of the underlying density field and, hence, their correlation properties would be amplified.…”

Section: Introductionmentioning

confidence: 99%

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COSMIC INFRARED BACKGROUND FLUCTUATIONS IN DEEP SPITZER INFRARED ARRAY CAMERA IMAGES: DATA PROCESSING AND ANALYSIS

Arendt¹,

Kashlinsky²,

Moseley³

et al. 2009

ApJS

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This paper provides a detailed description of the data reduction and analysis procedures that have been employed in our previous studies of spatial fluctuation of the cosmic infrared background (CIB) using deep Spitzer Infrared Array Camera observations. The self-calibration we apply removes a strong instrumental signal from the fluctuations that would otherwise corrupt the results. The procedures and results for masking bright sources and modeling faint sources down to levels set by the instrumental noise are presented. Various tests are performed to demonstrate that the resulting power spectra of these fields are not dominated by instrumental or procedural effects. These tests indicate that the large-scale ( 30 ) fluctuations that remain in the deepest fields are not directly related to the galaxies that are bright enough to be individually detected. We provide the parameterization of these power spectra in terms of separate instrument noise, shot noise, and power-law components. We discuss the relationship between fluctuations measured at different wavelengths and depths, and the relations between constraints on the mean intensity of the CIB and its fluctuation spectrum. Consistent with growing evidence that the ∼1-5 μm mean intensity of the CIB may not be as far above the integrated emission of resolved galaxies as has been reported in some analyses of DIRBE and IRTS observations, our measurements of spatial fluctuations of the CIB intensity indicate the mean emission from the objects producing the fluctuations is quite low ( 1 nW m −2 sr −1 at 3-5 μm), and thus consistent with current γ -ray absorption constraints. The source of the fluctuations may be high-z Population III objects, or a more local component of very low luminosity objects with clustering properties that differ from the resolved galaxies. Finally, we discuss the prospects of the upcoming space-based surveys to directly measure the epochs inhabited by the populations producing these source-subtracted CIB fluctuations, and to isolate the individual fluxes of these populations.

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Section: No 1 2010 Cib Fluctuations In Deep Spitzer Irac Images 11mentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

COSMIC INFRARED BACKGROUND FLUCTUATIONS IN DEEP SPITZER INFRARED ARRAY CAMERA IMAGES: DATA PROCESSING AND ANALYSIS

Arendt¹,

Kashlinsky²,

Moseley³

et al. 2009

ApJS

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show abstract

“…If so, this component would dominate small scales leading to significant modification of the history of collapse (and possibly formation of the first sources), resulting in greater rates of cosmic infrared background (CIB) production at z > 10. CIB contains emissions produced over the entire history of the universe including from sources inaccessible to direct telescopic studies (see the review by Kashlinsky 2005) with early stars and BHs contributing to its near-IR (∼1-5 μm) fluctuation component (Cooray et al 2004;Kashlinsky et al 2004). In this context, Kashlinsky (2005) and Kashlinsky et al (2007b) have identified from deep Spitzer data significant CIB fluctuations remaining on sub-degree scales after subtracting individual galaxies to faint levels.…”

Section: Introductionmentioning

confidence: 99%

Ligo Gravitational Wave Detection, Primordial Black Holes, and the Near-Ir Cosmic Infrared Background Anisotropies

Kashlinsky

2016

ApJL

187

168

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LIGOʼs discovery of a gravitational wave from two merging black holes (BHs) of similar masses rekindled suggestions that primordial BHs (PBHs) make up the dark matter (DM). If so, PBHs would add a Poissonian isocurvature density fluctuation component to the inflation-produced adiabatic density fluctuations. For LIGOʼs BH parameters, this extra component would dominate the small-scale power responsible for collapse of early DM halos at z  10, where first luminous sources formed. We quantify the resultant increase in high-z abundances of collapsed halos that are suitable for producing the first generation of stars and luminous sources. The significantly increased abundance of the early halos would naturally explain the observed source-subtracted near-IR cosmic infrared background (CIB) fluctuations, which cannot be accounted for by known galaxy populations. For LIGOʼs BH parameters, this increase is such that the observed CIB fluctuation levels at 2-5 μm can be produced if only a tiny fraction of baryons in the collapsed DM halos forms luminous sources. Gas accretion onto these PBHs in collapsed halos, where first stars should also form, would straightforwardly account for the observed high coherence between the CIB and unresolved cosmic X-ray background in soft X-rays. We discuss modifications possibly required in the processes of first star formation if LIGO-type BHs indeed make up the bulk or all of DM. The arguments are valid only if the PBHs make up all, or at least most, of DM, but at the same time the mechanism appears inevitable if DM is made of PBHs.

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“…Searches for this radiation based on absolute photometry have proven problematic due to confusion with the Zodiacal foreground. Instead of the absolute background, in Cooray et al (2004), we proposed to develop a near-infrared sounding rocket experiment, CIBER, to conduct a deep search for extragalactic background fluctuations from the epoch of reionization associated with first-light galaxies.…”

Section: Introductionmentioning

confidence: 99%

Cosmic Infrared Background ExpeRiment (CIBER): A probe of Extragalactic Background Light from reionization

et al. 2011

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Abstract. The Cosmic Infrared Background ExpeRiment (CIBER) is a rocket-borne absolute photometry imaging and spectroscopy experiment optimized to detect signatures of first-light galaxies present during reionization in the unresolved IR background. CIBER-I consists of a wide-field two-color camera for fluctuation measurements, a low-resolution absolute spectrometer for absolute EBL measurements, and a narrow-band imaging spectrometer to measure and correct scattered emission from the foreground zodiacal cloud. CIBER-I was successfully flown in February 2009 and July 2010 and four more flights are planned by 2014, including an upgrade (CIBER-II). We propose, after several additional flights of CIBER-I, an improved CIBER-II camera consisting of a wide-field 30 cm imager operating in 4 bands between 0.5 and 2.1 microns. It is designed for a high significance detection of unresolved IR background fluctuations at the minimum level necessary for reionization. With a FOV 50 to 2000 times larger than existing IR instruments on satellites, CIBER-II will carry out the definitive study to establish the surface density of sources responsible for reionization.

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First Star Signature in Infrared Background Anisotropies

Cited by 107 publications

References 57 publications

COSMIC INFRARED BACKGROUND FLUCTUATIONS IN DEEP SPITZER INFRARED ARRAY CAMERA IMAGES: DATA PROCESSING AND ANALYSIS

COSMIC INFRARED BACKGROUND FLUCTUATIONS IN DEEP SPITZER INFRARED ARRAY CAMERA IMAGES: DATA PROCESSING AND ANALYSIS

Ligo Gravitational Wave Detection, Primordial Black Holes, and the Near-Ir Cosmic Infrared Background Anisotropies

Cosmic Infrared Background ExpeRiment (CIBER): A probe of Extragalactic Background Light from reionization

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