The DOI matches its Crossref record; 60 of the 60 references it cites were found in a registry or an index.
Detection of orbital motions near the last stable circular orbit of the massive black hole SgrA*
Open accessAbstract
We report the detection of continuous positional and polarization changes of the compact source SgrA* in high states (“flares”) of its variable near-infrared emission with the near-infrared GRAVITY-Very Large Telescope Interferometer (VLTI) beam-combining instrument. In three prominent bright flares, the position centroids exhibit clockwise looped motion on the sky, on scales of typically 150 μ as over a few tens of minutes, corresponding to about 30% the speed of light. At the same time, the flares exhibit continuous rotation of the polarization angle, with about the same 45(±15) min period as that of the centroid motions. Modelling with relativistic ray tracing shows that these findings are all consistent with a near face-on, circular orbit of a compact polarized “hot spot” of infrared synchrotron emission at approximately six to ten times the gravitational radius of a black hole of 4 million solar masses. This corresponds to the region just outside the innermost, stable, prograde circular orbit (ISCO) of a Schwarzschild–Kerr black hole, or near the retrograde ISCO of a highly spun-up Kerr hole. The polarization signature is consistent with orbital motion in a strong poloidal magnetic field.
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Cites
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The Galactic Center massive black hole and nuclear star cluster
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Self-citationGRAVITY Collaboration, Abuter, R., Amorim, A., Anugu, N., Bauböck, M., Benisty, M., Berger, J. P., Blind, N., Bonnet, H., Brandner, W., et al. (2018) · Astronomy & Astrophysics · doi:10.1051/0004-6361/201833718 · Cited by 946
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The Event Horizon Telescope Collaboration, Akiyama, K., Alberdi, A., Alef, W., Asada, K., Azulay, R., Baczko, A.-K., Ball, D., Baloković, M., Barrett, J., et al. (2019) · The Astrophysical Journal Letters · doi:10.3847/2041-8213/ab0f43 · Cited by 1,424
Self-citationA geometric distance measurement to the Galactic center black hole with 0.3% uncertainty
The GRAVITY Collaboration, Abuter, R., Amorim, A., Bauböck, M., Berger, J. P., Bonnet, H., Brandner, W., Clénet, Y., Coudé du Foresto, V., de Zeeuw, P. T., et al. (2019) · Astronomy & Astrophysics · doi:10.1051/0004-6361/201935656 · Cited by 827
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Self-citationEvent Horizon Telescope Collaboration, Akiyama, K., Alberdi, A., Alef, W., Algaba, J. C., Anantua, R., Asada, K., Azulay, R., Bach, U., Baczko, A.-K., et al. (2022) · The Astrophysical Journal Letters · doi:10.3847/2041-8213/ac6429 · Cited by 449
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Metadata
- Authors
- GRAVITY Collaboration, Abuter, R., Amorim, A., Bauböck, M., Berger, J. P., Bonnet, H., Brandner, W., Clénet, Y., Coudé du Foresto, V., de Zeeuw, P. T., Deen, C., Dexter, J., Duvert, G., Eckart, A., Eisenhauer, F., Förster Schreiber, N. M., Garcia, P., Gao, F., Gendron, E., Genzel, R., Gillessen, S., Guajardo, P., Habibi, M., Haubois, X., Henning, T., Hippler, S., Horrobin, M., Huber, A., Jiménez-Rosales, A., Jocou, L., Kervella, P., Lacour, S., Lapeyrère, V., Lazareff, B., Le Bouquin, J.-B., Léna, P., Lippa, M., Ott, T., Panduro, J., Paumard, T., Perraut, K., Perrin, G., Pfuhl, O., Plewa, P. M., Rabien, S., Rodríguez-Coira, G., Rousset, G., Sternberg, A., Straub, O., Straubmeier, C., Sturm, E., Tacconi, L. J., Vincent, F., von Fellenberg, S., Waisberg, I., Widmann, F., Wieprecht, E., Wiezorrek, E., Woillez, J., & Yazici, S.
- Venue
- Astronomy & Astrophysics
- Publisher
- EDP Sciences
- Published
- 2018-10
- Volume
- 618
- Pages
- L10
- ISSN
- 0004-6361 (ISSN-L)
- 1432-0746
- OpenAlex
- W2897876225
- Cited by
- 432
- References
- 60
- FWCI
- 25.68
- Type
- journal article
- Language
- en
- Open access
- bronze
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- GRAVITY Collaboration, Abuter, R., Amorim, A., Bauböck, M., Berger, J. P., Bonnet, H., Brandner, W., Clénet, Y., Coudé du Foresto, V., de Zeeuw, P. T., Deen, C., Dexter, J., Duvert, G., Eckart, A., Eisenhauer, F., Förster Schreiber, N. M., Garcia, P., Gao, F., Gendron, E., . . . Yazici, S. (2018). Detection of orbital motions near the last stable circular orbit of the massive black hole SgrA*. Astronomy & Astrophysics. https://doi.org/10.1051/0004-6361/201834294
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