University of Hertfordshire Research Archive

        JavaScript is disabled for your browser. Some features of this site may not work without it.

        Browse

        All of UHRABy Issue DateAuthorsTitlesThis CollectionBy Issue DateAuthorsTitles

        Arkivum Files

        My Downloads
        View Item 
        • UHRA Home
        • University of Hertfordshire
        • Research publications
        • View Item
        • UHRA Home
        • University of Hertfordshire
        • Research publications
        • View Item

        A 100 pc elliptical and twisted ring of cold and dense molecular clouds revealed by Herschel around the galactic center

        View/Open
        905715.pdf (PDF, 4Mb)
        Author
        Molinari, S.
        Bally, J.
        Noriega-Crespo, A.
        Compiegne, M.
        Bernard, J.P.
        Paradis, D.
        Martin, P.
        Testi, L.
        Barlow, M.
        Moore, T.
        Plume, R.
        Swinyard, B.
        Zavagno, A.
        Calzoletti, L.
        M. Di Giorgio, A.
        Elia, D.
        Faustini, F.
        Natoli, P.
        Pestalozzi, Michele
        Pezzuto, S.
        Piacentini, F.
        Polenta, G.
        Polychroni, D.
        Schisano, E.
        Traficante, A.
        Veneziani, M.
        Battersby, C.
        Burton, M.
        Carey, S.
        Fukui, Y.
        Li, J.Z.
        Lord, S.D.
        Morgan, L.
        Motte, F.
        Schuller, F.
        Stringfellow, G.S.
        Tan, J.C.
        Thompson, Mark
        Ward-Thompson, D.
        White, G.
        Umana, G.
        Attention
        2299/6172
        Abstract
        Thermal images of cold dust in the Central Molecular Zone of the Milky Way, obtained with the far-infrared cameras on board the Herschel satellite, reveal a ~3 × 107 M ring of dense and cold clouds orbiting the Galactic center. Using a simple toy model, an elliptical shape having semi-major axes of 100 and 60 pc is deduced. The major axis of this 100 pc ring is inclined by about 40° with respect to the plane of the sky and is oriented perpendicular to the major axes of the Galactic Bar. The 100 pc ring appears to trace the system of stable x 2 orbits predicted for the barred Galactic potential. Sgr A is displaced with respect to the geometrical center of symmetry of the ring. The ring is twisted and its morphology suggests a flattening ratio of 2 for the Galactic potential, which is in good agreement with the bulge flattening ratio derived from the 2MASS data.
        Publication date
        2011
        Published in
        Astrophysical Journal Letters
        Published version
        https://doi.org/10.1088/2041-8205/735/2/L33
        Other links
        http://hdl.handle.net/2299/6172
        Metadata
        Show full item record
        Keep in touch

        © 2019 University of Hertfordshire

        I want to...

        • Apply for a course
        • Download a Prospectus
        • Find a job at the University
        • Make a complaint
        • Contact the Press Office

        Go to...

        • Accommodation booking
        • Your student record
        • Bayfordbury
        • KASPAR
        • UH Arts

        The small print

        • Terms of use
        • Privacy and cookies
        • Criminal Finances Act 2017
        • Modern Slavery Act 2015
        • Sitemap

        Find/Contact us

        • T: +44 (0)1707 284000
        • E: ask@herts.ac.uk
        • Where to find us
        • Parking
        • hr
        • qaa
        • stonewall
        • AMBA
        • ECU Race Charter
        • disability confident
        • AthenaSwan