Large-scale anomalies from primordial dissipation

Guido D'Amico, Roberto Gobbetti, Matthew Kleban, Marjorie Schillo

    Research output: Contribution to journalArticlepeer-review


    We analyze an inflationary model in which part of the power in density perturbations arises due to particle production. The amount of particle production is modulated by an auxiliary field. Given an initial gradient for the auxiliary field, this model produces a hemispherical power asymmetry and a suppression of power at low multipoles similar to those observed by WMAP and Planck in the CMB temperature. It also predicts an additive contribution to δT with support only at very small l that is aligned with the direction of the power asymmetry and has a definite sign, as well as small oscillations in the power spectrum at all l.

    Original languageEnglish (US)
    Article number013
    JournalJournal of Cosmology and Astroparticle Physics
    Issue number11
    StatePublished - Nov 2013


    • CMBR theory
    • cosmological perturbation theory
    • initial conditions and eternal universe

    ASJC Scopus subject areas

    • Astronomy and Astrophysics


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