We modelled the distribution and the kinematics of HI in the inner Milky Way (R < Ro) at latitude b = 0∘ assuming axi-symmetry. We fitted the line profiles of the LAB 21-cm survey using an iterative approach based on the tangent-point method. The resulting model reproduces the H I data remarkably well, with significant differences arising only for R < 2 kpc. This suggests that, despite the presence of a barred potential, the neutral gas in the inner Milky Way is distributed in a fairly axi-symmetric disc.
How axi-symmetric is the inner HI disc of the Milky Way? / A. Marasco; F. Fraternali. - In: EPJ WEB OF CONFERENCES. - ISSN 2100-014X. - ELETTRONICO. - 19:(2012), pp. 4-6. [10.1051/epjconf/20121908007]
How axi-symmetric is the inner HI disc of the Milky Way?
MARASCO, ANTONINO;FRATERNALI, FILIPPO
2012
Abstract
We modelled the distribution and the kinematics of HI in the inner Milky Way (R < Ro) at latitude b = 0∘ assuming axi-symmetry. We fitted the line profiles of the LAB 21-cm survey using an iterative approach based on the tangent-point method. The resulting model reproduces the H I data remarkably well, with significant differences arising only for R < 2 kpc. This suggests that, despite the presence of a barred potential, the neutral gas in the inner Milky Way is distributed in a fairly axi-symmetric disc.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
