Results 81 to 90 of about 120,893 (256)
The Dark Matter Annihilation Signal from Dwarf Galaxies and Subhalos
Advances in Astronomy, Volume 2010, Issue 1, 2010., 2010 Dark Matter annihilation holds great potential for directly probing the clumpiness of the Galactic halo that is one of the key predictions of the Cold Dark Matter paradigm of hierarchical structure formation. Here we review the γ‐ray signal arising from dark matter annihilation in the centers of Galactic subhalos.
Michael Kuhlen, Andrey V. Kravtsov
wiley +1 more source
Optical polarimetry of the inner Crab nebula and pulsar [PDF]
Monthly Notices of the Royal Astronomical Society, 2013 Time-resolved polarisation measurements of pulsars offer an unique insight into the geometry of their emission regions. Such measure\ ments provide observational constraints on the different models proposed for the pulsar emission mechanisms. Optical polarisation data of the Crab Nebula was obtained from the HST archive.
Slowikowska, A. +15 more
openaire +6 more sources
Testing Einstein's weak equivalence principle with a 0.4-nanosecond giant pulse of the Crab pulsar [PDF]
, 2016 Einstein's weak equivalence principle (EEP) can be tested through the arrival time delay between photons with different frequencies. Assuming that the arrival time delay is solely caused by the gravitational potential of the Milky Way, we show that a ...
Yuanpei Yang, Bing Zhang
semanticscholar +1 more source
Time Evolution of the X-Ray and γ-Ray Fluxes of the Crab Pulsar [PDF]
Astrophysical Journal, 2018 We studied the evolution of the X-ray and γ-ray spectra of the Crab pulsar utilizing the 11-year observations from the Rossi X-ray Timing Explorer (RXTE) and 9-year observations from the Fermi Gamma-ray Space Telescope (FGST).
Lin-Li Yan +8 more
semanticscholar +1 more source
Laue Gamma‐Ray Lenses for Space Astrophysics: Status and Prospects
X-Ray Optics and Instrumentation, Volume 2010, Issue 1, 2010., 2010 We review feasibility studies, technological developments, and the astrophysical prospects for Laue lenses devoted to hard X‐/gamma‐ray astronomy observations.
Filippo Frontera +2 more
wiley +1 more source
Radio emission of the Crab and Crab-like pulsars [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 The pulsar radio emission is commonly associated with the plasma outflow in the open field line tube; then a pencil beam is emitted along the pulsar magnetic axis. Observations suggest that there is an additional radio emission mechanism specific for pulsars with high magnetic field at the light cylinder. These pulsars are known to be strong sources of
openaire +2 more sources
A Review of Procedures for Summing Kapteyn Series in Mathematical Physics
Advances in Mathematical Physics, Volume 2009, Issue 1, 2009., 2009 Since the discussion of Kapteyn series occurrences in astronomical problems the wealth of mathematical physics problems in which such series play dominant roles has burgeoned massively. One of the major concerns is the ability to sum such series in closed form so that one can better understand the structural and functional behavior of the basic ...
R. C. Tautz, I. Lerche, M. Lakshmanan
wiley +1 more source
Pulse profile stability of the Crab pulsar [PDF]
Research in Astronomy and Astrophysics, 2011 9 pages, 5 figures, 1 table; accepted for publication in "Research In Astronomy and Astrophysics"
Biswajit Paul, Chetana Jain
openaire +3 more sources
Photometry and Polarimetry of the Crab Pulsar [PDF]
Symposium - International Astronomical Union, 1971 Observational results are presented for the pulse component, the nebula component and the wisp component of the Crab Nebula. The pulsar polarization is separated from the background nebular polarization. The relation between the pulsar and the adjacent nebula is discussed.
openaire +2 more sources
Test of Weak Equivalence Principle with the Multi-band Timing of the Crab Pulsar [PDF]
, 2016 The Weak Equivalent Principle (WEP) can be tested through the parameterized post-Newtonian parameter γ, representing the space curvature produced by unit rest mass.
Yueyang Zhang, B. Gong
semanticscholar +1 more source