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  • Gurvits, L. I.Technische Universiteit Delft,Delft University of Technology (TU Delft),Joint Institute for VLBI in Europe (JIVE) (author)

The science case and challenges of spaceborne sub-millimeter interferometry: the study case of TeraHertz Exploration and Zooming-in for Astrophysics (THEZA)

  • Article/chapterEnglish2021

Publisher, publication year, extent ...

  • 2021

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  • LIBRIS-ID:oai:research.chalmers.se:dd12423f-af60-49da-a1f8-079d280ad833
  • https://research.chalmers.se/publication/529456URI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

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  • Subject category:kon swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • Ultra-high angular resolution in astronomy has always been an important vehicle for making fundamental discoveries. Recent results in direct imaging of the vicinity of the super-massive black hole in the nucleus of the radio galaxy M87 by the millimeter VLBI system Event Horizon Telescope (EHT) and various pioneering results of the Space VLBI mission RadioAstron provided new momentum in high angular resolution astrophysics. In both mentioned cases, the angular resolution reached the values of about 10−20 microrcseconds (0.05−0.1 nanoradian). Angular resolution is proportional to the observing wavelength and inversely proportional to the interferometer baseline length. In the case of Earth-based EHT, the highest angular resolution was achieved by combining the shortest possible wavelength of 1.3 mm with the longest possible baselines, comparable to the Earth’s diameter. For RadioAstron, operational wavelengths were in the range from 92 cm down to 1.3 cm, but the baselines were as long as ∼350,000 km. However, these two highlights of radio astronomy, EHT and RadioAstron do not”saturate” the interest to further increase in angular resolution. Quite opposite: the science case for further increase in angular resolution of astrophysical studies becomes even stronger. A natural and, in fact, the only possible way of moving forward is to enhance mm/sub-mm VLBI by extending baselines to extraterrestrial dimensions, i.e. creating a mm/sub-mm Space VLBI system. The inevitable move toward space-borne mm/sub-mm VLBI is a subject of several concept studies. In this presentation we will focus on one of them called TeraHertz Exploration and Zooming-in for Astrophysics (THEZA), prepared in response to the ESA’s call for its next major science program Voyage 2050 (Gurvits et al. 2021). The THEZA rationale is focused at the physics of spacetime in the vicinity of super-massive black holes as the leading science drive. However, it will also open up a sizable new range of hitherto unreachable parameters of observational radio astrophysics and create a multi-disciplinary scientific facility and offer a high degree of synergy with prospective “single dish” space-borne sub-mm astronomy (e.g., Wiedner et al. 2021) and infrared interferometry (e.g., Linz et al. 2021). As an amalgam of several major trends of modern observational astrophysics, THEZA aims at facilitating a breakthrough in high-resolution high image quality astronomical studies.

Subject headings and genre

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  • Paragi, Z.Joint Institute for VLBI in Europe (JIVE) (author)
  • Amils, Ricardo I.Observatorio de Yebes (IGN),Yebes Observatory (author)
  • van Bemmel, I.Joint Institute for VLBI in Europe (JIVE) (author)
  • Boven, PaulJoint Institute for VLBI in Europe (JIVE) (author)
  • Casasola, V.Istituto nazionale di astrofisica (INAF) (author)
  • Conway, John,1963Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)jconway (author)
  • Davelaar, JordyColumbia University in the City of New York,Flatiron Institute (author)
  • Díez-González, M. CarmenObservatorio de Yebes (IGN),Yebes Observatory (author)
  • Falcke, H.D.Radboud Universiteit,Radboud University (author)
  • Fender, R. P.University Of Oxford (author)
  • Frey, SándorMagyar Tudomanyos Akademia,Hungarian Academy of Sciences,Eötvös Loránd University (ELTE) (author)
  • Fromm, Christian M.Johann Wolfgang Goethe Universität Frankfurt am Main,Goethe University Frankfurt (author)
  • Gallego-Puyol, Juan D.Observatorio de Yebes (IGN),Yebes Observatory (author)
  • García-Miró, CristinaObservatorio de Yebes (IGN),Yebes Observatory (author)
  • Garrett, M. A.Universiteit Leiden (UL),Leiden University (UL),University of Manchester (author)
  • Giroletti, M.Istituto nazionale di astrofisica (INAF) (author)
  • Goddi, C.Radboud Universiteit,Radboud University (author)
  • Gomez, J. L.Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA) (author)
  • van der Gucht, JeffreyRadboud Universiteit,Radboud University (author)
  • Guirado, J. C.Universitat de Valencia (author)
  • Haiman, ZoltánColumbia University in the City of New York (author)
  • Helmich, F.Rijksuniversiteit Groningen,University of Groningen,Netherlands Institute for Space Research (SRON) (author)
  • Hudson, Ben (author)
  • Humphreys, E.European Southern Observatory (ESO) (author)
  • Impellizzeri, C. M. V.Universiteit Leiden (UL),Leiden University (UL) (author)
  • Janssen, MichaelMax Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Johnson, Michael D.Harvard-Smithsonian Center for Astrophysics,Harvard University (author)
  • Kovalev, Yuri Y.Russian Academy of Sciences,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Moscow Institute of Physics and Technology (author)
  • Kramer, M.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Lindqvist, Michael,1960Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)mlq (author)
  • Linz, H.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Liuzzo, ElisabettaIstituto nazionale di astrofisica (INAF) (author)
  • Lobanov, A. P.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Lopez-Fernandez, I.Observatorio de Yebes (IGN),Yebes Observatory (author)
  • Malo-Gómez, InmaculadaObservatorio de Yebes (IGN),Yebes Observatory (author)
  • Masania, KunalTechnische Universiteit Delft,Delft University of Technology (TU Delft) (author)
  • Mizuno, YosukeJohann Wolfgang Goethe Universität Frankfurt am Main,Goethe University Frankfurt (author)
  • Plavin, Alexander V.Russian Academy of Sciences,Moscow Institute of Physics and Technology (author)
  • Rajan, Raj T.Technische Universiteit Delft,Delft University of Technology (TU Delft) (author)
  • Rezzolla, LucianoJohann Wolfgang Goethe Universität Frankfurt am Main,Goethe University Frankfurt (author)
  • Roelofs, F.Harvard-Smithsonian Center for Astrophysics (author)
  • Ros, EduardoMax Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Rygl, Kazi L.J.Istituto nazionale di astrofisica (INAF) (author)
  • Savolainen, T.Aalto-Yliopisto,Aalto University,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Schuster, K.Institut de Radioastronomie Millimétrique (IRAM) (author)
  • Venturi, T.Istituto nazionale di astrofisica (INAF) (author)
  • Verkouter, HarroJoint Institute for VLBI in Europe (JIVE) (author)
  • Vicente, P. deObservatorio de Yebes (IGN),Yebes Observatory (author)
  • Visser, Pieter N.A.M.Technische Universiteit Delft,Delft University of Technology (TU Delft) (author)
  • Wiedner, M.C.Observatoire de Paris,Paris Observatory (author)
  • Wielgus, M.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Wiik, K. (author)
  • Zensus, A.J.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Technische Universiteit DelftJoint Institute for VLBI in Europe (JIVE) (creator_code:org_t)

Related titles

  • In:Proceedings of the International Astronautical Congress, IACA70074-1795

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