Back to Volume
Paper: Spectroastrometry: A New Method for Direct Determination of Disc Kinematics
Volume: 337, The Nature and Evolution of Disks Around Hot Stars
Page: 299
Authors: Porter, J.M.; Oudmaijer, R.D.; Baines, D.
Abstract: The kinematics of discs around hot stars have never been directly measured because the sizes of the discs (~milli-arcseconds for the closest stars) is small compared to the typical seeing disc (~arcseconds). We describe a technique — spectroastrometry — which has the potential to probe disc kinematics directly on scales below the seeing disc. This technique does not use interferometry, but makes complete use of long-slit spectra, and hence can be used with simple spectrometers. Spectroastrometry may be used on a variety of astrophysical sources with an on-sky asymmetric velocity field. In particular we describe applications to binary objects, and disc kinematics.
Back to Volume