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Beschreibung
BeschreibungSig12-013.jpg |
English: Revealing Hidden Black Holes
The spiral galaxy NGC 3627 is located about 30 million light years from Earth. This composite image includes X-ray data from NASA's Chandra X-ray Observatory (blue), infrared data from the Spitzer Space Telescope (red), and optical data from the Hubble Space Telescope and the Very Large Telescope (yellow). The inset shows the central region, which contains a bright X-ray source that is likely powered by material falling onto a supermassive black hole. A search using archival data from previous Chandra observations of a sample of 62 nearby galaxies has shown that 37 of the galaxies, including NGC 3627, contain X-ray sources in their centers. Most of these sources are likely powered by central supermassive black holes. The survey, which also used data from the Spitzer Infrared Nearby Galaxy Survey, found that seven of the 37 sources are new supermassive black hole candidates. Confirming previous Chandra results, this study finds the fraction of galaxies found to be hosting supermassive black holes is much higher than found with optical searches. This shows the ability of X-ray observations to find black holes in galaxies where relatively low-level black hole activity has either been hidden by obscuring material or washed out by the bright optical light of the galaxy. The combined X-ray and infrared data suggest that the nuclear activity in a galaxy is not necessarily related to the amount of star-formation in the galaxy, contrary to some early claims. In contrast, these new results suggest that the mass of the supermassive black hole and the rate at which the black hole accretes matter are both greater for galaxies with greater total masses. A paper describing these results was published in the April 10, 2011 issue of The Astrophysical Journal. The authors are Catherine Grier and Smita Mathur of The Ohio State University in Columbus, OH; Himel GHosh of CNRS/CEA-Saclay in Guf-sur-Yvette, France and Laura Ferrarese from Herzberg Institute of Astrophysics in Victoria, Canada. NASA's Marshall Space Flight Center in Huntsville, Ala., manages the Chandra program for NASA's Science Mission Directorate in Washington. The Smithsonian Astrophysical Observatory controls Chandra's science and flight operations from Cambridge, Mass. About the Object Credit NASA/CXC/Ohio State Univ./C.Grier et al.; Optical: NASA/STScI, ESO/WFI; Infrared: NASA/JPL-Caltech Name NGC 3627 Type Galaxy > Type > Spiral Galaxy > Component > Central Black Hole Distance 29,000,000 Light Years Color Mapping Band Wavelength Telescope X-ray 1.5 keV Chandra ACIS Optical 429 nm VLT WFI Optical 554 nm VLT WFI Optical 657 nm VLT WFI Optical 814 nm Hubble WFPC2 Optical 658 nm Hubble WFPC2 Optical 555 nm Hubble WFPC2 Optical 814 nm Hubble ACS/WFC Optical 555 nm Hubble ACS/WFC Infrared 4.5 µm Spitzer IRAC |
Datum | |
Quelle | http://www.spitzer.caltech.edu/images/1260-ssc2004-12a-Morphology-of-Our-Galaxy-s-Twin |
Urheber |
Credit NASA/CXC/Ohio State Univ./C.Grier et al.; Optical: NASA/STScI, ESO/WFI; Infrared: NASA/JPL-Caltech |
Image use policy: http://www.spitzer.caltech.edu/info/18-Image-Use-Policy
Lizenz
Public domainPublic domainfalsefalse |
Diese Datei ist gemeinfrei (public domain), da sie von der NASA erstellt worden ist. Die NASA-Urheberrechtsrichtlinie besagt, dass „NASA-Material nicht durch Urheberrecht geschützt ist, wenn es nicht anders angegeben ist“. (NASA-Urheberrechtsrichtlinie-Seite oder JPL Image Use Policy). | ||
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Motiv
14. Dezember 2012
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aktuell | 01:49, 16. Jan. 2013 | 3.600 × 3.600 (1,36 MB) | Fabian RR | =={{int:filedesc}}== {{Information |description={{en|1='''Revealing Hidden Black Holes''' The spiral galaxy NGC 3627 is located about 30 million light years from Earth. This composite image includes X-ray data from NASA's Chandra X-ray Observatory (bl... |
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Fotograf | Chandra X-ray Observatory Center |
Kurztitel |
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Namensnennung/Veröffentlicher | NASA/CXC/Ohio State Univ./C.Grier et al.; Optical: NASA/STScI, ESO/WFI; Infrared: NASA/JPL-Caltech |
Titel | This composite image shows the spiral galaxy NGC 3627, located about 30 million light years from Earth. |
Quelle | Spitzer Space Telescope |
Nutzungsbedingungen | |
Erfassungszeitpunkt | 14. Dezember 2012 |
Breite | 3.600 px |
Höhe | 3.600 px |
Bits pro Farbkomponente |
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Art der Kompression | LZW |
Pixelzusammensetzung | RGB |
Kameraausrichtung | Normal |
Anzahl Komponenten | 3 |
Horizontale Auflösung | 300 dpi |
Vertikale Auflösung | 300 dpi |
Datenausrichtung | Grobformat |
Software | Adobe Photoshop CS3 Macintosh |
Speicherzeitpunkt | 14:34, 14. Dez. 2012 |
Exif-Version | 2.21 |
Farbraum | sRGB |
Kontaktinformationen | cxcpub@cfa.harvard.edu
http://www.spitzer.caltech.edu 1200 E. California Blvd. Pasadena, CA, 91125 USA |
Stichwörter | NGC 3627 |
IIM-Version | 4 |