Skip to main content Accessibility help
×
Home
Hostname: page-component-559fc8cf4f-x5fd4 Total loading time: 0.777 Render date: 2021-03-03T03:24:10.702Z Has data issue: true Feature Flags: { "shouldUseShareProductTool": true, "shouldUseHypothesis": true, "isUnsiloEnabled": true, "metricsAbstractViews": false, "figures": false, "newCiteModal": false, "newCitedByModal": true }

On the prospects of imaging Sagittarius A* from space

Published online by Cambridge University Press:  07 April 2020

Freek Roelofs
Affiliation:
Department of Astrophysics, Institute for Mathematics, Astrophysics and Particle Physics, Radboud University, PO Box 9010, 6500 GL Nijmegen, The Netherlands email: f.roelofs@astro.ru.nl
Heino Falcke
Affiliation:
Department of Astrophysics, Institute for Mathematics, Astrophysics and Particle Physics, Radboud University, PO Box 9010, 6500 GL Nijmegen, The Netherlands email: f.roelofs@astro.ru.nl Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany
Christiaan Brinkerink
Affiliation:
Department of Astrophysics, Institute for Mathematics, Astrophysics and Particle Physics, Radboud University, PO Box 9010, 6500 GL Nijmegen, The Netherlands email: f.roelofs@astro.ru.nl
Monika Moscibrodzka
Affiliation:
Department of Astrophysics, Institute for Mathematics, Astrophysics and Particle Physics, Radboud University, PO Box 9010, 6500 GL Nijmegen, The Netherlands email: f.roelofs@astro.ru.nl
Leonid I. Gurvits
Affiliation:
Joint Institute for VLBI ERIC, P.O. Box 2, 7990 AA Dwingeloo, The Netherlands Department of Astrodynamics and Space Missions, Delft University of Technology, 2629 HS Delft, The Netherlands
Manuel Martin-Neira
Affiliation:
European Space Research and Technology Centre (ESTEC), The European Space Agency, Keplerlaan 1, 2201 AZ Noordwijk, The Netherlands
Volodymyr Kudriashov
Affiliation:
Department of Astrophysics, Institute for Mathematics, Astrophysics and Particle Physics, Radboud University, PO Box 9010, 6500 GL Nijmegen, The Netherlands email: f.roelofs@astro.ru.nl
Marc Klein-Wolt
Affiliation:
Department of Astrophysics, Institute for Mathematics, Astrophysics and Particle Physics, Radboud University, PO Box 9010, 6500 GL Nijmegen, The Netherlands email: f.roelofs@astro.ru.nl
Remo Tilanus
Affiliation:
Department of Astrophysics, Institute for Mathematics, Astrophysics and Particle Physics, Radboud University, PO Box 9010, 6500 GL Nijmegen, The Netherlands email: f.roelofs@astro.ru.nl Leiden Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden, The Netherlands
Michael Kramer
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany
Luciano Rezzolla
Affiliation:
Institut für Theoretische Physik, Goethe-Universität, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany
Corresponding
E-mail address:

Abstract

Very Long Baseline Interferometry (VLBI) at sub-millimeter waves has the potential to image the shadow of the black hole in the Galactic Center, Sagittarius A* (Sgr A*), and thereby test basic predictions of the theory of general relativity. We investigate the imaging prospects of a new Space VLBI mission concept. The setup consists of two satellites in polar or equatorial circular Medium-Earth Orbits with slightly different radii, resulting in a dense spiral-shaped uv-coverage with long baselines, allowing for extremely high-resolution and high-fidelity imaging of radio sources. We simulate observations of a general relativistic magnetohydrodynamics model of Sgr A* for this configuration with noise calculated from model system parameters. After gridding the uv-plane and averaging visibilities accumulated over multiple months of integration, images of Sgr A* with a resolution of up to 4 μ as could be reconstructed, allowing for stronger tests of general relativity and accretion models than with ground-based VLBI.

Type
Contributed Papers
Copyright
© International Astronomical Union 2020

Access options

Get access to the full version of this content by using one of the access options below.

References

Bouman, K. L., Johnson, M. D., Dalca, A. V., et al. 2017, arXiv:1711.01357Google Scholar
Bower, G. C., Goss, W. M., Falcke, H., et al. 2006, ApJL, 648:L127L130CrossRefGoogle Scholar
Broderick, A. E., Fish, V. L., Johnson, M. D., et al. 2016, ApJ, 820:137CrossRefGoogle Scholar
Chael, A. A., Johnson, M. D., Narayan, R., et al. 2016, ApJ, 829:11CrossRefGoogle Scholar
Dexter, J., Agol, E., Fragile, P. C., & McKinney, J. C. 2010, ApJ, 717:10921104CrossRefGoogle Scholar
Falcke, H., Melia, F., & Agol, E. 2000, ApJL, 528:L13L16CrossRefGoogle Scholar
Ghez, A. M., Salim, S., Weinberg, N. N., et al. 2008, ApJ, 689:10441062CrossRefGoogle Scholar
Gillessen, S., Eisenhauer, F., Trippe, S., et al. 2009 ApJL, 692:10751109CrossRefGoogle Scholar
Goddi, C., Falcke, H., Kramer, M., et al. 2017, IJMPD, 26:1730001–239CrossRefGoogle Scholar
Gold, R., McKinney, J. C., Johnson, M. D., & Doeleman, S. S. 2017. ApJ, 837:180CrossRefGoogle Scholar
Johnson, M. D., Bouman, K. L., Blackburn, L., et al. 2017, ApJ, 850:172CrossRefGoogle Scholar
Johnson, M. D. & Gwinn, C. R. 2015. ApJ, 805:180CrossRefGoogle Scholar
Kudriashov, V. 2017. International Research Fellow Final Report, ESA-TECE-TN-007251Google Scholar
Lu, R.-S., Roelofs, F., Fish, V. L., et al. 2016, ApJ, 817:173CrossRefGoogle Scholar
Martin-Neira, M., Kudriashov, V., Barat, I., et al. 2017, In Proc. of the ARSI Workshop, ESTECGoogle Scholar
Mizuno, Y., Younsi, Z., Fromm, C. M., et al. 2018, ArXiv e-printsGoogle Scholar
Mościbrodzka, M., Falcke, H., Shiokawa, H., & Gammie, C. F. 2014, A&A, 570:A7Google Scholar
Mościbrodzka, M. & Gammie, C. F. 2018, MNRAS, 475:4354CrossRefGoogle Scholar
Psaltis, D., Özel, F., Chan, C.-K., & Marrone, D. P. 2015, ApJ, 814:115CrossRefGoogle Scholar
Roelofs, F., Falcke, H., Brinkerink, C., et al. 2019, A&A, 625:A124Google Scholar
Thompson, A. R., Moran, J. M., & Swenson, G. W., Jr. 2017, Interferometry and Synthesis in Radio Astronomy, 3rd EditionCrossRefGoogle Scholar

Altmetric attention score

Full text views

Full text views reflects PDF downloads, PDFs sent to Google Drive, Dropbox and Kindle and HTML full text views.

Total number of HTML views: 0
Total number of PDF views: 23 *
View data table for this chart

* Views captured on Cambridge Core between 07th April 2020 - 3rd March 2021. This data will be updated every 24 hours.

Send article to Kindle

To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

On the prospects of imaging Sagittarius A* from space
Available formats
×

Send article to Dropbox

To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

On the prospects of imaging Sagittarius A* from space
Available formats
×

Send article to Google Drive

To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

On the prospects of imaging Sagittarius A* from space
Available formats
×
×

Reply to: Submit a response


Your details


Conflicting interests

Do you have any conflicting interests? *