Bibcode
Font, J.; Beckman, J. E.; Zaragoza-Cardiel, J.; Fathi, Kambiz; Epinat, Benoit; Amram, Philippe
Referencia bibliográfica
Monthly Notices of the Royal Astronomical Society: Letters, Volume 444, Issue 1, p.L85-L89
Advertised on:
10
2014
Número de citas
14
Número de citas referidas
12
Descripción
We have obtained two-dimensional velocity fields in the ionized gas of a
set of eight double-barred galaxies, at high spatial and spectral
resolution, using their Hα emission fields measured with a
scanning Fabry-Perot spectrometer. Using the technique by which phase
reversals in the non-circular motion indicate a radius of corotation,
taking advantage of the high angular and velocity resolution, we have
obtained the corotation radii and the pattern speeds of both the major
bar and the small central bar in each of the galaxies; there are few
such measurements in the literature. Our results show that the inner bar
rotates more rapidly than the outer bar by a factor between 3.3 and 3.6.
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Estudios Cinemáticos, Estructurales y de Composición, de los Medios Interestelares e Intergalácticos
El objetivo básico del proyecto es investigar la evolución de las galaxias mediante el entendimiento de la interacción del medio interestelar y las estrellas. La técnica principal que utilizamos es la cinemática bidimensional de galaxias enteras observada por nuestro instrumento GHaFaS, un interferometro Fabry Perot en el telescopio William
Prof.
John E. Beckman