File:ISAAC spectrum of the centre of Centaurus A.jpg
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![File:ISAAC spectrum of the centre of Centaurus A.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/2/2b/ISAAC_spectrum_of_the_centre_of_Centaurus_A.jpg/800px-ISAAC_spectrum_of_the_centre_of_Centaurus_A.jpg?20130824225132)
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[edit]DescriptionISAAC spectrum of the centre of Centaurus A.jpg |
English: Two wavelength regions of one of the infrared ISAAC spectra of the center of Centaurus A. The direction of the long spectrograph slit is vertical and the dispersion (wavelength) direction is horizontal; longer wavelengths are towards the right. The two emission lines shown originate in singly ionized Iron ([FeII]; rest wavelength 1256.68 nm) and in Hydrogen (Paschen-Beta; 1281.81 nm) and both are clearly tilted. This is due to the rapid rotation of the accretion disk surrounding the supermassive black hole in the center of the galaxy. The light from the receding edge of the disk is Doppler-shifted towards the red (to the right) and the light from the part of the disk approaching us is shifted to the left. This may be better seen in the inserted enlargements. Therefore the inclined disk shows a tilted spectrum. These motions may be represented in a rotation curve, cf. ESO Press Photo eso0109. There are other emitting areas above and below the nucleus, especially in the Paschen-Beta line. |
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Source | http://www.eso.org/public/images/eso0109b/ |
Author | ESO |
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current | 22:51, 24 August 2013 | ![]() | 2,922 × 1,797 (3.7 MB) | Stas1995 (talk | contribs) | User created page with UploadWizard |
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Source | European Southern Observatory |
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Credit/Provider | ESO |
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Date and time of data generation | 00:00, 8 March 2001 |
Orientation | Normal |
Horizontal resolution | 57.002334594727 dpi |
Vertical resolution | 0.13838058440332 dpi |
File change date and time | Adobe Photoshop CS3 |
Color space | Uncalibrated |
Image width | 2,922 px |
Image height | 1,797 px |
Date and time of digitizing | 17:03, 7 January 2009 |
Date metadata was last modified | 17:44, 7 January 2009 |
Software used | Adobe Photoshop CS3 Macintosh |
Keywords | Centaurus A |
Contact information |
Karl-Schwarzschild-Strasse 2 Garching bei München, , D-85748 Germany |
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