GLOBAL COSMIC-RAY-RELATED LUMINOSITY AND ENERGY BUDGET OF THE MILKY WAY

By A. Strong, Troy A. Porter, S. Digel, G. Jóhannesson, P. Martin, Igor V. Moskalenko, E. Murphy, E. Orlando. 2010

189 citations recorded by the source corpus.

We use the GALPROP code for cosmic-ray (CR) propagation to calculate the broadband luminosity spectrum of the Milky Way related to CR propagation and interactions in the interstellar medium. This includes γ-ray emission from the production and subsequent decay of neutral pions (π0), bremsstrahlung, and inverse Compton scattering, and synchrotron radiation. The Galaxy is found to be nearly a CR electron calorimeter, but only if γ-ray emitting processes are taken into account. Synchrotron radiation alone accounts for only one-third of the total electron energy losses with ∼10%–20% of the total synchrotron emission from secondary CR electrons and positrons. The relationship between far-infrared and radio luminosity that we find from our models is consistent with that found for galaxies in general. The results will be useful for understanding the connection between diffuse emissions from radio through γ-rays in “normal” (non-active galactic nucleus dominated) galaxies as well as for estimating the broadband extragalactic diffuse background from these kinds of galaxies.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/73e6b6bd5a8823ebdf4073db267d12cb65af66fb

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. A. Strong
2. Anna Franckowiak
3. E. Orlando
4. Troy A. Porter
5. T. Slatyer
6. Igor V. Moskalenko
7. T. Jaffe
8. M. Su

In Nuclear and High Energy Physics

1. Anna Franckowiak
2. A. Strong
3. E. Orlando
4. Troy A. Porter
5. T. Slatyer
6. I. Grenier
7. T. Jaffe
8. J. Black

Citations in the corpus

• The Nine Lives of Cosmic Rays in Galaxies (2015, background): “Figure 7 shows the luminosity spectrum of the Galaxy from radio to γ rays, as well as proton and electron luminosities (Strong et al. 2010).”
• The interstellar cosmic-ray electron spectrum from synchrotron radiation and direct measurements. (2011, methodology): “An extensive review of CR propagation including electrons can be found in Strong et al. (2007); a recent global viewpoint for the Milky Way is given in Strong et al. (2010), and a propagation parameter study in Trotta et al. (2011).”
• GeV OBSERVATIONS OF STAR-FORMING GALAXIES WITH THE FERMI LARGE AREA TELESCOPE (2012, methodology): “The second spectral model is based on a model of the global emission from the Milky Way (Strong et al. 2010) scaled to the appropriate corresponding IR luminosity.”
• THE FIRST FERMI-LAT CATALOG OF SOURCES ABOVE 10 GeV (2013, background): “The total luminosity of the source population >10 GeV based on the reference model is 2.6 × 1038 photons s−1 or about 4 × 1036 erg s−1 compared to the total luminosity of the Galaxy from interstellar emission in this range: 3 × 1039 photons s−1 or 5 × 1037 erg s−1 (Strong et al. 2010).”
• THE FIRST FERMI LAT SUPERNOVA REMNANT CATALOG (2015, background): “SNRs have long been held the most promising candidate sources of Galactic CRs, capable of supplying the flux observed at Earth if they are on average ∼ 5 − 10% efficient in accelerating CR protons and nuclei (e.g. Strong et al. 2010).”
• Galactic synchrotron emission with cosmic ray propagation models (2013, methodology): “10: that of Strong et al. (2010) is flatter than the original Lorimer et al. (2006), but has more CR sources in the innermost region R < 2 kpc. Varying the CR source distribution does not significantly affect other propagation parameters; hence, we maintain all the parameter values of SUNE.”
• GIANT GAMMA-RAY BUBBLES FROM FERMI-LAT: ACTIVE GALACTIC NUCLEUS ACTIVITY OR BIPOLAR GALACTIC WIND? (2010, background): “For a Sun-GC distance of 8.5 kpc, this implies a distance of 9.6 kpc, and a total power (both bubbles) in the 1− 100 GeV band of 2.5×1040 GeV/s or 4.0× 1037 erg/s, which is ∼ 5% of the total Galactic gamma-ray luminosity between 0.1− 100 GeV (Strong et al. 2010).”
• CONSTRAINTS ON COSMIC-RAY PROPAGATION MODELS FROM A GLOBAL BAYESIAN ANALYSIS (2010, methodology): “Global CR-related properties of the Milky Way galaxy are calculated in Strong et al. (2010).”