The black hole at the center of the Milky Way:
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Bibliographische Detailangaben
1. Verfasser: Eckart, Andreas (VerfasserIn)
Format: Elektronisch E-Book
Sprache:English
Veröffentlicht: London Imperial College Press c2005
Schlagworte:
Online-Zugang:FAW01
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Beschreibung:Includes bibliographical references (p. 249-271) and index
Cover -- Contents -- Preface -- 1. Observational Techniques -- 1.1 The GC Across the Electromagnetic Spectrum -- 1.1.1 Radio Wavelengths -- 1.1.2 Far-Infrared Wavelengths -- 1.1.3 Near- and Mid-Infrared Wavelengths -- 1.1.4 Optical Wavelengths -- 1.1.5 X-Ray Energies -- 1.1.6 y-Ray Energies -- 1.2 NIR Imaging Through the Atmosphere -- 1.3 Speckle Imaging -- 1.3.1 The Knox-Thompson Method -- 1.3.2 The Bispectrum Analysis -- 1.3.3 Seeing Calibration of Fourier Data -- 1.3.4 The Shift-and-Add Algorithm -- 1.3.5 Speckle Spectroscopy -- 1.3.6 Speckle Instrumentation -- 1.4 Single Telescope Adaptive Optics -- 1.4.1 Adaptive Optics Imaging -- 1.4.2 Adaptive Optics Spectroscopy -- 1.4.3 Adaptive Optics Instrumentation -- 1.5 Cleaning and Deconvolution -- 1.5.1 Linear Deconvolution -- 1.5.2 Lucy-Richardson Deconvolution -- 1.5.3 Estimating the PSF -- 1.5.4 Iterative Blind Deconvolution -- 1.5.5 Comparison of Deconvolution Algorithms -- 1.6 Future IR Interferometry -- 1.6.1 VLTI --
- 1.6.2 Keck Interferometer -- 1.6.3 LBT LINC/NIRVANA -- 2. Observational Results -- 2.1 The Discovery of Sagittarius A -- 2.2 Large-Scale Structures at the Galactic Center -- 2.3 The Circum Nuclear Disk -- 2.4 The Mini-Spiral -- 2.5 Radio Filaments -- 2.6 Near-Infrared Images of the Central Stellar Cluster -- 2.6.1 A Brief History of NIR Imaging -- 2.6.2 Diffraction Limited Images -- 2.7 The Radio and Infrared Positional Reference Frames -- 2.8 Number Density Counts -- 2.8.1 Evidence for a Central Stellar Cusp -- 2.8.2 K-band Luminosity Function -- 2.9 Polarization of Filaments and Stars -- 2.9.1 Extended Filaments in the Sgr A Complex -- 2.9.2 Polarized Emission from Stars -- 2.10 Stellar Velocities and Orbital Accelerations -- 2.10.1 Measuring Stellar Proper Motions -- 2.10.2 Motions in the Outer Cluster -- 2.10.3 Motions in the Inner Cluster -- 2.10.4 Accelerations of Stars Near Sgr A -- 2.10.5 Stellar Orbits -- 2.11 Spectroscopy -- 2.11.1 Stellar Populations --
- 2.11.2 The Upper Mass Cut-Off -- 2.11.3 The Central Arcsecond -- 2.11.4 Results of Speckle Spectroscopy -- 2.11.5 Adaptive Optics Spectroscopy of the Central Cusp -- 2.12 Star Formation at the Galactic Center? -- 2.12.1 Embedded Objects -- 2.12.2 IR-Excess Objects -- 2.13 Sgr AddXMLRootTags.pl Across the Electromagnetic Spectrum -- 2.13.1 Size and Spectrum of Sgr AddXMLRootTags.pl at Radio Wavelengths -- 2.13.2 Polarization of Sgr AddXMLRootTags.pl at Radio Wavelengths -- 2.13.3 Sgr AddXMLRootTags.pl as a Variable X-Ray Source -- 2.13.4 Sgr AddXMLRootTags.pl as a Variable NIR Source -- 2.13.5 How Likely are Strong NIR Flares? -- 2.13.6 First Simultaneous X-Ray/NIR Detection of Sgr AddXMLRootTags.pl -- 3. Astrophysical Results -- 3.1 The Stellar Velocity Field -- 3.2 Scenarios for Star Formation at the Galactic Center -- 3.2.1 Infall of Stellar Clusters -- 3.2.2 In Situ Formation from Dense Gas -- 3.2.3 Formation of Stars in the Mini-Spiral --
- 3.2.4 Capture of Stars by Ejection of Stellar Remnants -- 3.3 The Central Dark Mass -- 3.3.1 First Order Estimates -- 3.3.2 Mass Estimators -- 3.3.3 The Jeans Method -- 3.3.4 The Orbit of the Star S2 -- 3.3.5 Orbits of Other Stars Around Sgr AddXMLRootTags.pl -- 3.3.6 A Lower Limit to the Mass -- 3.4 Stability of the Enclosed Dark Mass -- 3.5 Agglomerations of Exotic Particles? -- 3.6 The Central Stellar Cusp -- 3.6.1 Spatial Distribution of the Sta
Reviewing the fundamental instrumental techniques and current observational results, this book unveils the mysteries of the physical processes in the central parsec of our Milky Way: the super-massive black hole embedded in a central stellar cluster as well as the gas and dust in the circumnuclear region. The observations described cover the entire electromagnetic spectrum from decimeter radio-waves to high energy X-ray and -rays, and a comprehensive summary of up-to-date astrophysical interpretations is given. The emphasis is put on observational techniques, image processing aspects, and a detailed presentation of the most cutting-edge work carried out in the near-infrared wavelength regime. These recent results include both the first orbits of stars around the central black hole and the multiwavelength variability of the central source
Beschreibung:1 Online-Ressource (xxii, 284 p.)
ISBN:1860945678
1860947395
9781860945670
9781860947391

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