Constraining the IMF using TeV gamma ray absorption

Details Constraining the IMF using TeV gamma ray absorption Constraining the IMF using TeV gamma ray absorption

1998-12-20

arxiv.org/abs/astro-ph/9812370v1

Astropart.Phys.11:111-112,1999

Astronomy and Astrophysics

Astrophysics

contribution to "TeV Astrophysics of Extragalactic Sources" VERITAS workshop, editors M. Catanese, J. Quinn, T. Weekes; 3 page

Scientific paper

10.1016/S0927-6505(99)00033-X

Gamma rays of ~TeV energies from distant sources suffer attenuation due to pair production off of ~1 micron EBL photons. We may exploit this process in order to indirectly measure the EBL and constrain models of galaxy formation. Here, using semi-analytic models of galaxy formation, we examine how gamma ray absorption may be used as an indirect probe of the stellar initial mass function (IMF), although there is a degeneracy with dust modeling. We point out that with the new generation of gamma ray telescopes including STACEE, MAGIC, HESS, VERITAS, and Milagro, we should soon possess a wealth of new data and a new method for probing the nature of the IMF.

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