title: Ultracompact Minihalos as Probes of Inflationary Cosmology.
abstract: Cosmological inflation generates primordial density perturbations on all scales, including those far too small to contribute to the cosmic microwave background. At these scales, isolated ultracompact minihalos of dark matter can form well before standard structure formation, if the perturbations have sufficient amplitude. Minihalos affect pulsar timing data and are potentially bright sources of gamma rays. The resulting constraints significantly extend the observable window of inflation in the presence of cold dark matter, coupling two of the key problems in modern cosmology.
authors.affiliation: Department of Physics, University of Auckland, Private Bag 92019 Auckland, New Zealand.|Berkeley Center for Cosmological Physics, University of California, Berkeley, California 94720, USA.
authors.forename: Grigor
authors.initials: G
authors.lastname: Aslanyan
authors.affiliation: Department of Physics, University of Auckland, Private Bag 92019 Auckland, New Zealand.|McWilliams Center for Cosmology, Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
authors.forename: Layne C
authors.initials: LC
authors.lastname: Price
authors.affiliation: Department of Physics and Astronomy, University of Canterbury, Christchurch 8140, New Zealand.
authors.forename: Jenni
authors.initials: J
authors.lastname: Adams
authors.affiliation: Department of Physics, University of Oslo, Box 1048 NO-0316 Oslo, Norway.
authors.forename: Torsten
authors.initials: T
authors.lastname: Bringmann
authors.affiliation: Sydney Institute for Astronomy, School of Physics A28, The University of Sydney, Sydney, New South Wales 2006, Australia.
authors.forename: Hamish A
authors.initials: HA
authors.lastname: Clark
authors.affiliation: Department of Physics, University of Auckland, Private Bag 92019 Auckland, New Zealand.
authors.forename: Richard
authors.initials: R
authors.lastname: Easther
authors.affiliation: Sydney Institute for Astronomy, School of Physics A28, The University of Sydney, Sydney, New South Wales 2006, Australia.
authors.forename: Geraint F
authors.initials: GF
authors.lastname: Lewis
authors.affiliation: Department of Physics, Imperial College London, Blackett Laboratory, Prince Consort Road, London SW7 2AZ, United Kingdom.
authors.forename: Pat
authors.initials: P
authors.lastname: Scott