ATTENTION: The software behind KU ScholarWorks is being upgraded to a new version. Starting July 15th, users will not be able to log in to the system, add items, nor make any changes until the new version is in place at the end of July. Searching for articles and opening files will continue to work while the system is being updated.
If you have any questions, please contact Marianne Reed at mreed@ku.edu .
Direct determination of astronomical distances and proper motions by interferometric parallax
dc.contributor.author | Jain, P. | |
dc.contributor.author | Ralston, John P. | |
dc.date.accessioned | 2023-07-31T14:01:32Z | |
dc.date.available | 2023-07-31T14:01:32Z | |
dc.date.issued | 2008-04-28 | |
dc.identifier.citation | P. Jain, J. P. Ralston. Direct determination of astronomical distances and proper motions by interferometric parallax. A&A, 484 3 (2008) 887-895. DOI: https://doi.org/10.1051/0004-6361:20078669 | en_US |
dc.identifier.uri | https://hdl.handle.net/1808/34666 | |
dc.description.abstract | Aims. We discuss a new method for measuring the distances to astronomical objects and their transverse proper velocities.Methods. The phenomenon of interferometric parallax identifies a component of 2- and 4-point amplitude and the intensity correlations that can be observed at frequencies ranging from radio to optical. The calculation hinges on terms depending on the source to receiver separation that are conventionally neglected in the Van Cittert-Zernicke theorem.Results. Order of magnitude estimates find that the baselines of Earth-bound VLBI systems might be capable of measuring 10-100 kpc distance scales. In either the optical or radio regime, space-borne detectors with fine baseline control might resolve source distances of Gigaparsec order. We discuss the possibility that an independent distance ladder based directly on experimental measurement might be constructed on multiple scales. | en_US |
dc.publisher | EDP Sciences | en_US |
dc.rights | © ESO, 2008 | en_US |
dc.subject | Interferometric | en_US |
dc.subject | Astrometry | en_US |
dc.subject | Interferometers | en_US |
dc.title | Direct determination of astronomical distances and proper motions by interferometric parallax | en_US |
dc.type | Article | en_US |
kusw.kuauthor | Ralston, John P. | |
kusw.kudepartment | Physics & Astronomy | en_US |
dc.identifier.doi | 10.1051/0004-6361:20078669 | en_US |
kusw.oaversion | Scholarly/refereed, publisher version | en_US |
kusw.oapolicy | This item meets KU Open Access policy criteria. | en_US |
dc.rights.accessrights | openAccess | en_US |