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8 papers · 2 filters
Ultraviolet Signposts of Resonant Dynamics in the Starburst-Ringed Sab Galaxy, M94 (NGC 4736)
William H. Waller, Michael N. Fanelli, William C. Keel +10
M94 (NGC 4736) is investigated using images from the Ultraviolet Imaging Telescope (FUV-band), Hubble Space Telescope (NUV-band), Kitt Peak 0.9-m telescope (H-alpha, R, and I bands…
Far Ultraviolet Imagery of the Edge-On Spiral Galaxy NGC 4631
Andrew M. Smith, Nicholas R. Collins, William H. Waller +10
Far ultraviolet FUV imagery of the edge-on, Sc/SBd galaxy, NGC 4631 reveals very strong FUV emission, resulting from active star formation, uniformly distributed along the galactic…
A vorton gun
Ken D. Olum, J. J. Blanco-Pillado, Xavier Siemens
In about half of all near-cusp events in superconducting cosmic strings with chiral currents (and probably with general currents as well), the string intersects itself near the cus…
Electromagnetic radiation from superconducting string cusps
J. J. Blanco-Pillado, Ken D. Olum
Cusps in superconducting cosmic strings produce strongly beamed electromagnetic radiation. To calculate the energy emitted requires taking into account the effect of the charge car…
Dynamics of Cosmic Necklaces
Xavier Siemens, Xavier Martin, Ken D. Olum
We perform numerical simulations of cosmic necklaces (systems of monopoles connected to two strings each) and investigate the conditions under which monopoles annihilate. When the…
Dynamics of superconducting strings with chiral currents
J. J. Blanco-Pillado, Ken D. Olum, Alexander Vilenkin
We rederive, using an elementary formalism, the general solution to the equations of motion for a superconducting string with a chiral (null) neutral current, earlier obtained by C…