ICRC2015

Session

Parallel GA14 GAL / Bubbles etc

4 Aug 2015, 11:00

World Forum

379. Fermi Bubbles with HAWC

Hugo Ayala (Michigan Technological University)

04/08/2015, 11:00

GA-EX

Oral contribution

The Fermi Bubbles, which comprise two large and homogeneous regions of spectrally hard gamma-ray emission extending up to 55º above and below the Galactic Center, were first noticed in GeV gamma-ray data from the Fermi Telescope in 2010. The mechanism or mechanisms which produce the observed hard spectrum are not understood. Although both hadronic and leptonic models can describe the spectrum...

792. Giant Shocks in the Fermi Bubbles and the Origin of the Microwave Haze

Roland Crocker (Australian National University)

04/08/2015, 11:15

GA-TH

Oral contribution

Analysis of γ-ray data provided by the Fermi-LAT has revealed giant, hard-spectrum γ-ray lobes emanating from the Galactic nucleus (and extending to |b| ∼ 50°). These `Fermi Bubbles' have hard-spectrum, total-intensity microwave (∼20-40 GHz) counterparts in their lower reaches (the microwave `Haze' extending to |b| ∼ 35°) and, on large scales, are subsumed by steep spectrum, polarised radio...

825. Evidence for a hadronic origin of the Fermi Bubbles, formed by outflows from star-forming regions

Wim De Boer (KIT - Karlsruhe Institute of Technology (DE))

04/08/2015, 11:30

GA-TH

Oral contribution

The Fermi-LAT 6-year data provide a detailed map of the diffuse gamma-ray sky for which the main contributions originate from neutral pion decay, bremsstrahlung and inverse Compton scattering. The energy spectra of these contributions are known from laboratory experiments and can be used as templates to fit the energy spectra of the Fermi data in each direction, thus providing the...

323. HAWC Observation of Supernova Remnants and Pulsar Wind Nebulae

C. Michelle Hui (Michigan Technological University)

04/08/2015, 11:45

GA-EX

Oral contribution

The majority of Galactic TeV gamma-ray sources are pulsar wind nebulae (PWNe) and supernova remnants (SNRs), and the most common association for unidentified sources is PWN. Many of these sources were discovered in TeV by imaging air Cherenkov telescopes using overlapping pointed observations over sections of the Galactic plane. The HAWC observatory is a survey type instrument in the Northern...

1092. The Galactic Center region imaged with MAGIC and variability searches during the G2 pericenter passage

Christian Fruck (MPP)

04/08/2015, 12:00

GA-EX

Oral contribution

We present the results from the Major Atmospheric Gamma Imaging Cherenkov (MAGIC) telescope of the search for TeV variability in the very high energy (VHE) gamma ray regime performed during the pericenter passage of the G2 gas cloud. This gas cloud orbits the Galactic Center (GC) on a highly eccentric trajectory with a pericenter distance of only a few thousand Schwarzschild radii, The GC has...

726. Towards a Detection of the Geminga Supernova Remnant with VERITAS

Mr Andrew Flinders (University of Utah)

04/08/2015, 12:15

GA-EX

Oral contribution

Geminga was first detected as a gamma-ray point source by the SAS-2 gamma-ray satellite observatory and the COS-B X-ray satellite observatory. Subsequent observations have identified Geminga as a heavily obscured radio-quiet pulsar associated with a nearby (250 pc) late Sedov phase (300,000 year) supernova remnant. The Geminga pulsar is the second brightest source detected by the Large Area...