QUIJOTE scientific results - XIII. Intensity and polarization study of the microwave spectra of supernova remnants in the QUIJOTE-MFI wide survey: CTB 80, Cygnus Loop, HB 21, CTA 1, Tycho, and HB 9

We use the new QUIJOTE-MFI wide survey (11, 13, 17, and 19 GHz) to produce spectral energy distributions (SEDs), on an angular scale of 1°, of the supernova remnants (SNRs) CTB 80, Cygnus Loop, HB 21, CTA 1, Tycho, and HB 9. We provide new measurements of the polarized synchrotron radiation in the m...

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Detalles Bibliográficos
Autores: López Caraballo, Carlos H., Ruiz Granados, Beatriz, Génova Santos, Ricardo Tanausú, Fernández Torreiro, Mateo, Rubiño Martín, José Alberto, Peel, Mike W., Poidevin, Frédérick, Artal Latorre, Eduardo|||0000-0002-2569-1894, Ashdown, Mark, Barreiro Vilas, Rita Belén|||0000-0002-6139-4272, Casas Reinares, Francisco Javier|||0000-0002-2217-5843, Hoz López-Collado, Elena de la, González González, Raúl, Guidi, Federica, Herranz Muñoz, Diego|||0000-0003-4540-1417, Hoyland, Roger J., Lasenby, Anthony, Martínez González, Enrique, Piccirillo, L., Vielva Martínez, Patricio|||0000-0003-0051-272X
Tipo de recurso: artículo
Fecha de publicación:2024
País:España
Institución:Universidad de Cantabria (UC)
Repositorio:UCrea Repositorio Abierto de la Universidad de Cantabria
Idioma:inglés
OAI Identifier:oai:repositorio.unican.es:10902/30905
Acceso en línea:https://hdl.handle.net/10902/30905
Access Level:acceso abierto
Palabra clave:Polarization
Radiation mechanisms: general
ISM: supernova remnants
Radio continuum: ISM
Descripción
Sumario:We use the new QUIJOTE-MFI wide survey (11, 13, 17, and 19 GHz) to produce spectral energy distributions (SEDs), on an angular scale of 1°, of the supernova remnants (SNRs) CTB 80, Cygnus Loop, HB 21, CTA 1, Tycho, and HB 9. We provide new measurements of the polarized synchrotron radiation in the microwave range. The intensity and polarization SEDs are obtained and modelled by combining QUIJOTE-MFI maps with ancillary data. In intensity, we confirm the curved spectra of CTB 80 and HB 21 with a break frequency νb at 2.0 and [+1.2 -0.5] 5.0 [+1.2 -1.0] GHz, respectively; and spectral indices above the break of -0.6[+0.04 -.0.05] and -0.86[+0.04 -0.05]. We provide constraints on the Anomalous Microwave Emission, suggesting that it is negligible towards these SNRs. From a simultaneous intensity and polarization fit, we recover synchrotron spectral indices as flat as -0.24, and the whole sample has a mean and scatter of -0.44 ± 0.12. The polarization fractions have a mean and scatter of 6.1 ± 1.9 per cent. When combining our results with the measurements from other QUIJOTE (Q-U-I JOint TEnerife CMB experiment) studies of SNRs, we find that radio spectral indices are flatter for mature SNRs, and particularly flatter for CTB 80 (-0.24 [+0.07 -0.06]) and HB 21 (-0.34 [+0.04 -0.03]). In addition, the evolution of the spectral indices against the SNRs age is modelled with a power-law function, providing an exponent -0.07 ± 0.03 and amplitude -0.49 ± 0.02 (at 10 kyr), which are conservative with respect to previous studies of our Galaxy and the Large Magellanic Cloud.

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