Early SPI/INTEGRAL constraints on the morphology of the 511 keV line emission in the 4th galactic quadrant

By Jürgen Knödlseder, Vincent Lonjou, P. Jean, M. Allain, P. Mandrou, J. Roques, G. Skinner, G. Vedrenne, P. Ballmoos, G. Weidenspointner and 4 more. 2003

144 citations recorded by the source corpus.

We provide first constraints on the morphology of the 511 keV line emission from the galactic centre region on basis of data taken with the spectrometer SPI on the INTEGRAL gamma-ray observatory. The data suggest an azimuthally symmetric galactic bulge component with FWHMof 9 with a 2 uncertainty range covering 6 18. The 511 keV line flux in the bulge component amounts to 9:9 +4:7

Subfields: Aerospace Engineering, Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/d08bed3e13f0dda3c9e67850aff4bca61ee816bc

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In Astronomy and Astrophysics

1. A. Strong
2. J. Greiner
3. M. Krause
4. E. Churazov
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6. S. Sazonov
7. R. Diehl
8. L. Roszkowski

Citations in the corpus

• Gamma-ray spectroscopy of Positron Annihilation in the Milky Way (2015, background): “This led to a first all-sky image of positron annihilation gamma-rays (Knödlseder et al. 2003, 2005).”
• Positron annihilation spectrum from the Galactic Centre region observed by SPI/INTEGRAL (2004, methodology): “…analysis (∼6◦) is rather close to the value derived for the central bulge from OSSE observations (Kinzer et al., 2001), while the earlier analysis of shorter SPI data set suggested somewhat broader distribution ∼9◦(Knödlseder et al., 2003) although consistent with 6◦within quoted uncertainties.”
• WIMP dark matter candidates and searches—current status and future prospects (2017, background): “h DM annihilations associated with subsequent microwave synchrotron emission (see, e.g., [346]). A possible hint of light DM was provided by the excess of -rays observed by the INTEGRAL collaboration [347,348]. It corresponds to 511 keV -ray line that has no widely accepted astrophysical explanation”