We report results from the first Earth-space VLBI observations of the Galactic Center supermassive black hole, Sgr A*. These observations used the space telescope Spektr-R of the RadioAstron project together with a global network of 20 ground telescopes, observing at a wavelength of 1.35 cm. Spektr-R provided baselines up to 3.9 times the diameter of the Earth, corresponding to an angular resolution of approximately 55
- Home
- Search Results
- Page 1 of 1
Search for: All records
-
Total Resources2
- Resource Type
-
00020
- Availability
-
20
- Author / Contributor
- Filter by Author / Creator
-
-
Bruni, Gabriele (2)
-
Johnson, Michael D. (2)
-
Akiyama, Kazunori (1)
-
Alberdi, Antxon (1)
-
Alef, Walter (1)
-
Algaba, Juan Carlos (1)
-
Anantua, Richard (1)
-
Asada, Keiichi (1)
-
Azulay, Rebecca (1)
-
Baczko, Anne-Kathrin (1)
-
Ball, David (1)
-
Baloković, Mislav (1)
-
Barrett, John (1)
-
Bemmel, Ilse van (1)
-
Benson, Bradford A. (1)
-
Bintley, Dan (1)
-
Blackburn, Lindy (1)
-
Blundell, Raymond (1)
-
Boland, Wilfred (1)
-
Bouman, Katherine L. (1)
-
- Filter by Editor
-
-
null (1)
-
& Spizer, S. M. (0)
-
& . Spizer, S. (0)
-
& Ahn, J. (0)
-
& Bateiha, S. (0)
-
& Bosch, N. (0)
-
& Brennan K. (0)
-
& Brennan, K. (0)
-
& Chen, B. (0)
-
& Chen, Bodong (0)
-
& Drown, S. (0)
-
& Ferretti, F. (0)
-
& Higgins, A. (0)
-
& J. Peters (0)
-
& Kali, Y. (0)
-
& Ruiz-Arias, P.M. (0)
-
& S. Spitzer (0)
-
& Spitzer, S. (0)
-
& Spitzer, S.M. (0)
-
(submitted - in Review for IEEE ICASSP-2024) (0)
-
-
Have feedback or suggestions for a way to improve these results?
!
Note: When clicking on a Digital Object Identifier (DOI) number, you will be taken to an external site maintained by the publisher.
Some full text articles may not yet be available without a charge during the embargo (administrative interval).
What is a DOI Number?
Some links on this page may take you to non-federal websites. Their policies may differ from this site.
-
Abstract μ as and a spatial resolution of 5.5R Schat the source, whereR Sch≡ 2GM /c 2is the Schwarzschild radius of Sgr A*. Our short ground baseline measurements ( ≲ 80 Mλ ) are consistent with an anisotropic Gaussian image, while our intermediate ground baseline measurements (100–250 Mλ ) confirm the presence of persistent image substructure in Sgr A*. Both features are consistent with theoretical expectations for strong scattering in the ionized interstellar medium, which produces Gaussian scatter-broadening on short baselines and refractive substructure on long baselines. We do not detect interferometric fringes on any of the longer ground baselines or on any ground–space baselines. While space-VLBI offers a promising pathway to sharper angular resolution and the measurement of key gravitational signatures in black holes, such as their photon rings, our results demonstrate that space-VLBI studies of Sgr A* will require sensitive observations at submillimeter wavelengths. -
Goddi, Ciriaco ; Martí-Vidal, Iván ; Messias, Hugo ; Bower, Geoffrey C. ; Broderick, Avery E. ; Dexter, Jason ; Marrone, Daniel P. ; Moscibrodzka, Monika ; Nagai, Hiroshi ; Algaba, Juan Carlos ; et al ( , The Astrophysical Journal Letters)null (Ed.)