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Cited by 214Astrophysical Phenomena and ObservationsRadio Astronomy Observations and TechnologyPulsars and Gravitational Waves Research

The DOI matches its Crossref record; 29 of the 30 references it cites were found in a registry or an index.

1.3 mm WAVELENGTH VLBI OF SAGITTARIUS A*: DETECTION OF TIME-VARIABLE EMISSION ON EVENT HORIZON SCALES

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Fish, Vincent L., Doeleman, Sheperd S., Beaudoin, Christopher, Blundell, Ray, Bolin, David E., Bower, Geoffrey C., Chamberlin, Richard, Freund, Robert, Friberg, Per, Gurwell, Mark A., Honma, Mareki, Inoue, Makoto, Krichbaum, Thomas P., Lamb, James, Marrone, Daniel P., Moran, James M., Oyama, Tomoaki, Plambeck, Richard, Primiani, Rurik, Rogers, Alan E. E., Smythe, Daniel L., SooHoo, Jason, Strittmatter, Peter, Tilanus, Remo P. J., Titus, Michael, Weintroub, Jonathan, Wright, Melvyn, Woody, David, Young, Ken H., Ziurys, Lucy M.·2011·The Astrophysical Journal
DOI 10.1088/2041-8205/727/2/l36
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Abstract

Sagittarius A*, the ∼4 × 10 6 M ☉ black hole candidate at the Galactic center, can be studied on Schwarzschild radius scales with (sub)millimeter wavelength very long baseline interferometry (VLBI). We report on 1.3 mm wavelength observations of Sgr A* using a VLBI array consisting of the JCMT on Mauna Kea, the Arizona Radio Observatory's Submillimeter Telescope on Mt. Graham in Arizona, and two telescopes of the CARMA array at Cedar Flat in California. Both Sgr A* and the quasar calibrator 1924−292 were observed over three consecutive nights, and both sources were clearly detected on all baselines. For the first time, we are able to extract 1.3 mm VLBI interferometer phase information on Sgr A* through measurement of closure phase on the triangle of baselines. On the third night of observing, the correlated flux density of Sgr A* on all VLBI baselines increased relative to the first two nights, providing strong evidence for time-variable change on scales of a few Schwarzschild radii. These results suggest that future VLBI observations with greater sensitivity and additional baselines will play a valuable role in determining the structure of emission near the event horizon of Sgr A*.

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Research works printed but not linked: 3

  1. Broderick, 2010, ApJ
  2. 10.1111/mnr.2007.379.issue-4 · DOI
  3. Shcherbakov, 2010, ApJ

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Metadata

Authors
Fish, V. L., Doeleman, S. S., Beaudoin, C., Blundell, R., Bolin, D. E., Bower, G. C., Chamberlin, R., Freund, R., Friberg, P., Gurwell, M. A., Honma, M., Inoue, M., Krichbaum, T. P., Lamb, J., Marrone, D. P., Moran, J. M., Oyama, T., Plambeck, R., Primiani, R., Rogers, A. E. E., Smythe, D. L., SooHoo, J., Strittmatter, P., Tilanus, R. P. J., Titus, M., Weintroub, J., Wright, M., Woody, D., Young, K. H., & Ziurys, L. M.
Affiliations
  • Massachusetts Institute of Technology (US)
  • Center for Astrophysics Harvard & Smithsonian (US)
  • University of Arizona (US)
  • University of California, Berkeley (US)
  • Caltech Submillimeter Observatory (US)
  • National Astronomical Observatory of Japan (JP)
  • Institute of Astronomy and Astrophysics, Academia Sinica (TW)
  • Max Planck Institute for Radio Astronomy (DE)
  • California Institute of Technology (US)
  • University of Chicago (US)
  • Dutch Research Council (NL)
Corresponding author
Fish, Vincent L.
ORCID
Venue
The Astrophysical Journal
Publisher
American Astronomical Society
Published
2011-01-10
Volume
727
Issue
2
Pages
L36
ISSN
  • 2041-8205 (ISSN-L)
  • 2041-8213
DOI
10.1088/2041-8205/727/2/l36
OpenAlex
W2117092829
Cited by
214
References
30
Citations by year
2026: 1 · 2025: 1 · 2024: 3 · 2023: 2 · 2022: 12 · 2021: 9 · 2020: 9 · 2019: 18 · 2018: 32 · 2017: 18 · 2016: 32 · 2015: 20 · 2014: 18 · 2013: 14 · 2012: 13
FWCI
9.50
Type
journal article
Language
en
Open access
Locations
  • The Astrophysical Journal Letters (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • CaltechAUTHORS (California Institute of Technology) (submittedVersion)
  • Digital Access to Scholarship at Harvard (DASH) (Harvard University) (submittedVersion, cc-by)
  • arXiv (Cornell University)
Funders
Japan Society for the Promotion of Science (21244019)
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astrophysical Phenomena and Observations
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Radio Astronomy Observations and Technology
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Pulsars and Gravitational Waves Research
Keywords
Sgr A*, Galactic Center black hole, submillimeter interferometry, closure phases, Schwarzschild radius, black hole accretion, James Clerk Maxwell Telescope

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