Valentin D. Ivanov
Towards a fundamental astrometric reference system behind the Malleganic clouds : spectroscopic confirmation of new quasar candidates selected in the near-infrared
Ivanov, Valentin D.; Cioni, Maria-Rosa Lucia; Bekki, Kenji; De Grijs, Richard; Emerson, Jim; Gibson, Brad K.; Kamath, Devika; Van Loon, Jacco Th; Piatti, Andrés; For, Bi-Qing
Authors
Maria-Rosa Lucia Cioni
Kenji Bekki
Richard De Grijs
Jim Emerson
Brad K. Gibson
Devika Kamath
Jacco Th Van Loon
Andrés Piatti
Bi-Qing For
Abstract
Quasi-stellar objects (quasars) located behind nearby galaxies provide an excellent absolute reference system for astrometric studies, but they are difficult to identify because of fore- and background contamination. We have embarked on a programme to expand the quasar reference system behind the Large and Small Magellanic Clouds, the Magellanic Bridge and Magellanic Stream. Hundreds of quasar candidates were selected, based on their near-infrared colours and variability properties from the ESO VISTA Magellanic Clouds (VMC) Public Survey. A subset of 49 objects was followed up with optical spectroscopy with FORS2. We confirmed the quasar nature of 37 objects (34 new identifications) that span a redshift range from z ~ 0.5 to 4.1.
Citation
Ivanov, V. D., Cioni, M.-R. L., Bekki, K., De Grijs, R., Emerson, J., Gibson, B. K., Kamath, D., Van Loon, J. T., Piatti, A., & For, B.-Q. (2016). Towards a fundamental astrometric reference system behind the Malleganic clouds : spectroscopic confirmation of new quasar candidates selected in the near-infrared. The Messenger, 32-34
Journal Article Type | Article |
---|---|
Acceptance Date | Mar 1, 2016 |
Publication Date | Oct 3, 2016 |
Deposit Date | Mar 10, 2017 |
Publicly Available Date | Mar 10, 2017 |
Journal | ESO messenger |
Print ISSN | 0722-6691 |
Electronic ISSN | 0722-6691 |
Publisher | European Southern Observatory |
Peer Reviewed | Not Peer Reviewed |
Issue | 163 |
Pages | 32-34 |
Keywords | Quasars |
Public URL | https://hull-repository.worktribe.com/output/449461 |
Publisher URL | https://www.eso.org/sci/publications/messenger/archive/no.163-mar16/messenger-no163-32-34.pdf |
Additional Information | This is a copy of an article published in ESO Messenger, 2016, issue 163. |
Contract Date | Mar 10, 2017 |
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