Extragalactic astronomy with the OHANA array

Julien Woillez, Helene Sol, Olivier Lai, Olivier Guyon, Guy Perrin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The Optical Hawaiian Array for Nanoradian Astronomy (OHANA) will allow resolutions on the order of a fraction of a milliarcsecond in the near infrared. This corresponds to the suspected size of the Broad Line Region and might even allow to study the structure of the base of jets. Preliminary studies with baselines on the order of or greater than 200 meters will be needed to understand these complex objects and successively refine existing models. The continuum visibilities will distinguish any unresolved source from resolved ones. Spectrally resolved visibilities in the H band and in Paschen lines will directly test competing models for the velocity structures that produce the observed line broadening. According to the unified model, the results of these measurements may be expected to depend on the relative viewing geometry. In Phase II, OHANA will be able to select, from many dozens of candidate sources, those most likely to present distinctive differences. A preparatory survey with adaptive optics is already under way. Four different scientific cases involving the OHANA array are reviewed: Active Galactic Nuclei geometries, Broad Line Region tomography, Broad Line Region dynamics, absolute distance measurements with Active Galactic Nuclei.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsW.A. Traub
Pages1389-1395
Number of pages7
Volume4838
Edition2
DOIs
StatePublished - 2002
Externally publishedYes
EventInterferometry for Optical Astronomy II - Waikoloa, HI, United States
Duration: Aug 22 2002Aug 28 2002

Other

OtherInterferometry for Optical Astronomy II
CountryUnited States
CityWaikoloa, HI
Period8/22/028/28/02

Fingerprint

Astronomy
astronomy
Visibility
visibility
active galactic nuclei
Distance measurement
Adaptive optics
Geometry
Tomography
Light sources
geometry
adaptive optics
Infrared radiation
tomography
continuums

Keywords

  • Active Galactic Nuclei
  • Interferometry
  • OHANA

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Woillez, J., Sol, H., Lai, O., Guyon, O., & Perrin, G. (2002). Extragalactic astronomy with the OHANA array. In W. A. Traub (Ed.), Proceedings of SPIE - The International Society for Optical Engineering (2 ed., Vol. 4838, pp. 1389-1395) https://doi.org/10.1117/12.458072

Extragalactic astronomy with the OHANA array. / Woillez, Julien; Sol, Helene; Lai, Olivier; Guyon, Olivier; Perrin, Guy.

Proceedings of SPIE - The International Society for Optical Engineering. ed. / W.A. Traub. Vol. 4838 2. ed. 2002. p. 1389-1395.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Woillez, J, Sol, H, Lai, O, Guyon, O & Perrin, G 2002, Extragalactic astronomy with the OHANA array. in WA Traub (ed.), Proceedings of SPIE - The International Society for Optical Engineering. 2 edn, vol. 4838, pp. 1389-1395, Interferometry for Optical Astronomy II, Waikoloa, HI, United States, 8/22/02. https://doi.org/10.1117/12.458072
Woillez J, Sol H, Lai O, Guyon O, Perrin G. Extragalactic astronomy with the OHANA array. In Traub WA, editor, Proceedings of SPIE - The International Society for Optical Engineering. 2 ed. Vol. 4838. 2002. p. 1389-1395 https://doi.org/10.1117/12.458072
Woillez, Julien ; Sol, Helene ; Lai, Olivier ; Guyon, Olivier ; Perrin, Guy. / Extragalactic astronomy with the OHANA array. Proceedings of SPIE - The International Society for Optical Engineering. editor / W.A. Traub. Vol. 4838 2. ed. 2002. pp. 1389-1395
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