QUIJOTE scientific results -- VI. The Haze as seen by QUIJOTE
F. Guidi, R. T. G\'enova-Santos, J. A. Rubi\~no-Mart\'in, M. W. Peel,, M. Fern\'andez-Torreiro, C. H. L\'opez-Caraballo, R. Vignaga, E. de la Hoz,, P. Vielva, R. A. Watson, M. Ashdown, C. Dickinson, E. Artal, R. B. Barreiro,, F. J. Casas, D. Herranz, R. J. Hoyland, A. N. Lasenby

TL;DR
This paper presents new QUIJOTE observations of the Galactic Haze at 11 and 13 GHz, analyzing its intensity and polarization, revealing a flatter spectrum than previous estimates and providing first hints of polarized emission associated with the Haze.
Contribution
It offers a re-analysis of the Galactic Haze incorporating new QUIJOTE data, characterizing its spectral properties and polarization, and exploring its physical origin.
Findings
Haze spectrum is a power-law with spectral index -2.79±0.08.
Detected polarized signal in the Haze area, hinting at polarization.
Spectrum of polarized structures steep at low frequencies and flatter above 11 GHz.
Abstract
The Haze is an excess of microwave intensity emission surrounding the Galactic centre. It is spatially correlated with the -ray Fermi bubbles, and with the S-PASS radio polarization plumes, suggesting a possible common provenance. The models proposed to explain the origin of the Haze, including energetic events at the Galactic centre and dark matter decay in the Galactic halo, do not yet provide a clear physical interpretation. In this paper we present a re-analysis of the Haze including new observations from the Multi-Frequency Instrument (MFI) of the Q-U-I JOint TEnerife (QUIJOTE) experiment, at 11 and 13 GHz. We analyze the Haze in intensity and polarization, characterizing its spectrum. We detect an excess of diffuse intensity signal ascribed to the Haze. The spectrum at frequencies 1170 GHz is a power-law with spectral index ,…
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