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| Format: | Artículo científico |
| Sprache: | en |
| Veröffentlicht: |
Universidad Nacional Autónoma de México
2008
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| Online-Zugang: | https://www.redalyc.org/articulo.oa?id=57103204 |
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Inhaltsangabe:
- Near-infrared observations of Sagittarius A S. Trippe T. Paumard S. Gillessen T. Ott F. Eisenhauer F. Martins R. Genzel Física, Astronomía y Matemáticas accretion Galaxy: centre accretion discs Black hole physics We present and discuss recent near infrared observations of Sagittarius A, the supermassive black hole inthe centre of our Galaxy. Since 2003 this source has been observed photometrically, polarimetrically, andspectroscopically in H, K and L bands (1.5-4.1μm). The emission shows up in form of outbursts occuring fewtimes per day and lasting typically 1-3 hours. These "flares" show quasi-periodic sub-structures at timescalesof ~15 minutes. They are significantly polarised and show a variable spectral colour index. All in all, theobservations point towards decaying plasma hotspots orbiting the black hole on relativistic orbits as a sourceof NIR synchrotron emission. 2008 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57103204 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Vol.32