How axi-symmetric is the inner HI disc of the Milky Way?

How axi-symmetric is the inner HI disc of the Milky Way?

We modelled the distribution and the kinematics of HI in the inner Milky Way (R < R☉) 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 remarkabl...

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Bibliographic Details
Main Authors: Marasco A., Fraternali F.
Format: Article
Language:English
Published: EDP Sciences 2012-02-01
Series:EPJ Web of Conferences
Online Access:http://dx.doi.org/10.1051/epjconf/20121908007
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spelling doaj-b94939aea78444a992199f53e9bdf3b52021-08-02T04:07:39ZengEDP SciencesEPJ Web of Conferences2100-014X2012-02-01190800710.1051/epjconf/20121908007How axi-symmetric is the inner HI disc of the Milky Way?Marasco A.Fraternali F.We modelled the distribution and the kinematics of HI in the inner Milky Way (R < R☉) 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. http://dx.doi.org/10.1051/epjconf/20121908007
collection DOAJ
language English
format Article
sources DOAJ
author Marasco A.
Fraternali F.
spellingShingle Marasco A.
Fraternali F.
How axi-symmetric is the inner HI disc of the Milky Way?
EPJ Web of Conferences
author_facet Marasco A.
Fraternali F.
author_sort Marasco A.
title How axi-symmetric is the inner HI disc of the Milky Way?
title_short How axi-symmetric is the inner HI disc of the Milky Way?
title_full How axi-symmetric is the inner HI disc of the Milky Way?
title_fullStr How axi-symmetric is the inner HI disc of the Milky Way?
title_full_unstemmed How axi-symmetric is the inner HI disc of the Milky Way?
title_sort how axi-symmetric is the inner hi disc of the milky way?
publisher EDP Sciences
series EPJ Web of Conferences
issn 2100-014X
publishDate 2012-02-01
description We modelled the distribution and the kinematics of HI in the inner Milky Way (R < R☉) 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.
url http://dx.doi.org/10.1051/epjconf/20121908007
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AT fraternalif howaxisymmetricistheinnerhidiscofthemilkyway
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