QUIJOTE scientific results - III. Microwave spectrum of intensity and polarization in the Taurus Molecular Cloud complex and L1527

Poidevin, F.; Rubiño-Martín, J. A.; Dickinson, C.; Génova-Santos, R.; Harper, S.; Rebolo, R.; Casaponsa, B.; Peláez-Santos, A.; Vignaga, R.; Guidi, F.; Ruiz-Granados, B.; Tramonte, D.; Vansyngel, F.; Ashdown, M.; Herranz, D.; Hoyland, R.; Lasenby, A.; Martínez-González, E.; Piccirillo, L.; Watson, R. A.
Bibliographical reference

Monthly Notices of the Royal Astronomical Society, Volume 486, Issue 1, p.462-485

Advertised on:
6
2019
Number of authors
20
IAC number of authors
11
Citations
8
Refereed citations
8
Description
We present new intensity and polarization observations of the Taurus Molecular Cloud (TMC) region in the frequency range 10-20 GHz with the multifrequency instrument (MFI) mounted on the first telescope of the Q-U-I-JOint TEnerife (QUIJOTE) experiment. From the combination of the QUIJOTE data with the WMAP 9-yr data release, the Planck second data release, the DIRBE maps, and ancillary data, we detect an anomalous microwave emission (AME) component with flux density S_{AME, peak} = 43.0 ± 7.9 Jy in the TMC and S_{AME, peak} = 10.7 ± 2.7 Jy in the dark cloud nebula L1527, which is part of the TMC. In the TMC the diffuse AME emission peaks around a frequency of 19 GHz, compared with an emission peak about a frequency of 25 GHz in L1527. In the TMC, the best constraint on the level of AME polarization is obtained at the Planck channel of 28.4 GHz, with an upper limit π _AME< 4.2 {{ per cent}} (95 {{ per cent}} C.L.), which reduces to π _AME< 3.8 {{ per cent}} (95 {{ per cent}} C.L.) if the intensity of all the free-free, synchrotron and thermal dust components are negligible at this frequency. The same analysis in L1527 leads to π _AME< 5.3{{ per cent}} (95 {{ per cent}} C.L.) or π _AME< 4.5 {{ per cent}} (95 {{ per cent}} C.L.) under the same assumption. We find that in the TMC and L1527 on average about 80{{ per cent}} of the H II gas should be mixed with thermal dust. Our analysis shows how the QUIJOTE-MFI 10-20 GHz data provide key information to properly separate the synchrotron, free-free, and AME components.
Related projects
Full-sky map showing the spatial distribution of the primary anisotropies of the Cosmic Microwave Background (generated 380,000 years after the Big Bang) derived from observations of the Planck satellite
Anisotropy of the Cosmic Microwave Background

The general goal of this project is to determine and characterize the spatial and spectral variations in the temperature and polarisation of the Cosmic Microwave Background in angular scales from several arcminutes to several degrees. The primordial matter density fluctuations which originated the structure in the matter distribution of the present

Rafael
Rebolo López
The QUIJOTE experiment at the Teide Observatory
QUIJOTE CMB Experiment (Q-U-I JOint TEnerife CMB Experiment)

QUIJOTE es un programa de dos telescopios y su batería de instrumentos, instalados en el Observatorio del Teide, dedicados fundamentalmente a la caracterización de la polarización del Fondo Cósmico de Microondas, en el rango de frecuencias de 10-42 GHz.

José Alberto
Rubiño Martín
Project Image
Formation and Evolution of Galaxies: Observations in Infrared and other Wavelengths

This IAC research group carries out several extragalactic projects in different spectral ranges, using space as well as ground-based telescopes, to study the cosmological evolution of galaxies and the origin of nuclear activity in active galaxies. The group is a member of the international consortium which built the SPIRE instrument for the

Ismael
Pérez Fournon