A proposed mission in the MeV range Report from the ... · Andrzej A. Zdziarski Centrum...
Transcript of A proposed mission in the MeV range Report from the ... · Andrzej A. Zdziarski Centrum...
Andrzej A. Zdziarski
Centrum Astronomiczne im. M. Kopernika
Warszawa, Poland
A proposed mission in the
MeV range
Report from the meeting in
Paris, 15-16.01.2013
Current astrophysical high-energy
coverage• XMM, Chandra: 0.2 keV–10 keV;
• Suzaku: 0.5–300 keV;
• INTEGRAL: 3 keV–1 MeV;
• Fermi: 0.1–100 GeV;
• Cherenkov telescopes, e.g., HESS, MAGIC,
VERITAS: 0.1 – 10 TeV.
• The missing range: 1 – 100 MeV.
• In the past, only CGRO/COMPTEL covered the
1–10 MeV range, but at a rather low sensitivity.
The sensitivity of existing and
past detectors
missing
coverage
Main astrophysical topics• The Galactic Center
• 511 keV emission from positronium annihilation
• Gamma-ray emission from type Ia supernovae
• Supernovae and radioactivity
• Ti line emission from young supernovae
• Classical Novae explosions
• Continuum emission from particle acceleration in novae
• MeV astronomy in high-energy interstellar medium
• Nuclear gamma-ray lines from low-energy cosmic rays
• Gamma-ray binaries
• Gamma-ray line emission from X-ray binaries
• MeV emission of black-hole binaries from jets and accretion
• Gamma-ray bursts
• Active Galactic Nuclei
• Magnetars and rotation-powered pulsars
• Pulsar wind nebulae
• Supernova remnants and superbubbles
• Terrestial gamma ray flashes
γ-rays:
jet
Cyg X-3: missing 0.2–100 MeV data,
intersection of the jet and accretion spectra
synchrotron
SSC
synchrotron
X-rays:
accretion) bb Compton
thermal Comptonization
nonthermal
Comptonization
blackbody disc
a weak nonthermal tail
from hybrid plasma
Cyg X-1 – sparse or missing MeV data
soft
hard
Fermi upper limits in
the soft state
An example blazar spectrum:
Tavecchio et al. 2002
missing MeV
coverage
511 keV emission from the inner Galaxy –
the bulge emission origin remains unknown
The spectrum of the inner part of the
Galaxy: contribution of point sources in
the MeV range?
Supernovae and anomalous X-ray
pulsars:
Coverage needed
Current studies
Requirements:
The expected sensitivity of GRIPS (an
M3 proposal not chosen by ESA)
Broad band spectra of blazars, pulsars
and gamma ray bursts