Idioma:

The kinematic structure of magnetically aligned H i filaments

Kim, Doyeon A ; Clark, S E ; Putman, M E ; Li, Larry

Monthly notices of the Royal Astronomical Society, 2023-10, Vol.526 (3), p.4345-4358 [Periódico revisado por pares]

Texto completo disponível

Citações Citado por

Título:
The kinematic structure of magnetically aligned H i filaments
Autor: Kim, Doyeon A ; Clark, S E ; Putman, M E ; Li, Larry
É parte de: Monthly notices of the Royal Astronomical Society, 2023-10, Vol.526 (3), p.4345-4358
Descrição: ABSTRACT We characterize the kinematic and magnetic properties of H i filaments located in a high Galactic latitude region (165° < α < 195° and 12° < δ < 24°). We extract three-dimensional filamentary structures using fil3d from the Galactic Arecibo L-Band Feed Array H i (GALFA-H i) survey 21-cm emission data. Our algorithm identifies coherent emission structures in neighbouring velocity channels. Based on the mean velocity, we identify a population of local and intermediate velocity cloud (IVC) filaments. We find the orientations of the local (but not the IVC) H i filaments are aligned with the magnetic field orientations inferred from Planck 353 GHz polarized dust emission. We analyse position–velocity diagrams of the velocity-coherent filaments, and find that only 15 per cent of filaments demonstrate significant major-axis velocity gradients with a median magnitude of 0.5 km s−1 pc−1, assuming a fiducial filament distance of 100 pc. We conclude that the typical diffuse H i filament does not exhibit a simple velocity gradient. The reported filament properties constrain future theoretical models of filament formation.
Editor: Oxford University Press
Idioma: Inglês

Voltar para lista de resultados

Anterior Resultado 2 Avançar Ir para próxima página