Microwave thermal emission from the zodiacal dust cloud predicted with contemporary meteoroid models

Abstract

Predictions of the microwave thermal emission from the zodiacal dust cloud are made using several contemporary meteoroid models to construct the distributions of the cross-section area of dust in space, and by applying the Mie light-scattering theory to estimate the temperatures and emissivities of dust particles in a wide range of sizes and heliocentric distances. In particular, the Kelsall model of the zodiacal light emission based on COBE infrared observations is extrapolated to the microwaves with assistance from fits to selected IRAS and Planck data. Furthermore, the five populations of interplanetary meteoroids by Divine and the Interplanetary Meteoroid Engineering Model (IMEM) based on a variety of remote and in situ observations of dust are used in combination with the optical properties of olivine, carbonaceous, and iron spherical particles. The Kelsall model has been accepted by the cosmic microwave background (CMB) community for subtraction of the zodiacal cloud's foreground emission. We show, however, that the Kelsall model predicts microwave emission from interplanetary dust that is remarkably different from the results obtained by applying the meteoroid engineering models. We make maps and spectra of the microwave emission predicted by all three models assuming different compositions of dust particles. The predictions can be used to look for the emission from interplanetary dust in CMB experiments and to plan new observations.

Is the observable Universe consistent with the cosmological principle?

“…Here we also recall that the WMAP and Planck satellites made observations from Lagrange point 2 (L 2 ) while going round the Sun (in ecliptic plane) from behind the Earth. But it would be difficult to explain this in terms of a Solar System foreground (see section 4.1 of [211], and also [212]). Some of the higher order multipoles (ℓ > 3) of CMB sky were also found to be initially aligned with the quadrupole and octopole (besides CMB dipole) [204].…”

A near-infrared interferometric survey of debris-disk stars. VII. The hot/warm dust connection

“…However, in our Solar system, zodiacal dust is much more extended than the habitable zone, and actually shows an increasing density down to the F-corona, with a possible dust-free zone within 0.1-0.2 au from the Sun (e.g. Dikarev & Schwarz 2015;Howard et al 2019). Likewise, it is expected that exozodiacal dust can extend over a broad range of separations from its host star, much larger than just the habitable zone.…”

Interplanetary Dust as a Foreground for the LiteBIRD CMB Satellite Mission

“…Before finishing, it's worth recalling that IPDE models are fairly uncertain at these "long wavelengths" of interest to CMB experimenters. Dikarev & Schwarz (2015) have compared the Kelsall et al (1998) model with two other, more recent models and found significant differences. While their Divine (1993) and Dikarev et al (2005) models have less "structure" in them, the absolute level of the contamination is, in fact, estimated to be higher than that in the Kelsall et al (1998) model, and may, therefore, show more contamination in CMB maps (see also Jorgensen et al 2021).…”

“…While IPDE did not significantly affect the Planck results, its existence did complicated some aspects of the Planck /HFI analyses. We must recognize that IPDE models are still very approximate, especially at long wavelengths (Dikarev & Schwarz 2015), and that the polarization properties of IPDE are still poorly constrained. But the ambitious LiteBIRD goals demand that we check that IPDE will not compromise the measurements.…”