EPJ Web of Conferences
Volume 19, 2012Assembling the Puzzle of the Milky Way
|Number of page(s)||7|
|Section||Disc Non-axisymetries: Spiral, Warp, Bar. What Structure, What Dynamics?|
|Published online||07 February 2012|
Stellar kinematical signatures of disc non-axisymmetries in the extended solar neighbourhood
1 Observatoire Astronomique de Strasbourg, CNRS UMR 7550, France
2 Argelander Institute for Astronomy, Bonn, Germany
3 Leibniz-Institut für Astrophysik, Potsdam, Germany
a e-mail: email@example.com
Bars and spirals are among the main drivers of the secular evolution of galactic disks, and it is, thus, of prime importance to better understand their exact nature and dynamics. In this respect, the Milky Way provides a unique laboratory in which to study a snapshot of their detailed dynamical influence in six-dimensional phase-space. With the advent of present and future astrometric and spectroscopic surveys, such six-dimensional phase-space data can be obtained for stars in an increasingly large volume around the Sun. Here, we review the signatures of – and constraints on – disk non-axisymmetries obtained from recent stellar kinematical data sets, including (i) the detection of resonant moving groups in the solar neighbourhood, (ii) the non-zero value of the Oort constants C and K, and (iii) the detection of a radial velocity gradient of ∼ 4km/s/kpc in the extended solar neighbourhood (d < 2 kpc).
© Owned by the authors, published by EDP Sciences, 2012
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.