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14 papers · 1 filter
Ultraviolet Spectropolarimetry with Polstar: Clumping and Mass-loss Rate Corrections
Ken Gayley, Jorick S. Vink, Asif ud-Doula +13
The most massive stars are thought to lose a significant fraction of their mass in a steady wind during the main-sequence and blue supergiant phases. This in turn sets the stage fo…
Ultraviolet Spectropolarimetry with Polstar: Interstellar Medium Science
B-G Andersson, Geoffrey C. Clayton, Kirstin D. Doney +5
Continuum polarization over the UV-to-microwave range is due to dichroic extinction (or emission) by asymmetric, aligned dust grains. Because of both grain alignment and scattering…
UV Spectropolarimetry with Polstar: Protoplanetary Disks
John P. Wisniewski, Andrei V. Berdyugin, Svetlana V. Berdyugina +13
Polstar is a proposed NASA MIDEX mission that would feature a high resolution UV spectropolarimeter capable of measure all four Stokes parameters onboard a 60cm telescope. The miss…
Ultraviolet Spectropolarimetry:Conservative and Nonconservative Mass Transfer in OB Interacting Binaries
Geraldine J. Peters, Ken Gayley, Richard Ignace +11
One objective of the Polstar spectropolarimetry mission is to characterize the degree of nonconservative mass transfer that occurs at various stages of binary evolution, from the i…
Ultraviolet Spectropolarimetry: on the origin of rapidly rotating B stars
C. E. Jones, J. Labadie-Bartz, D. V. Cotton +12
UV spectroscopy and spectropolarimetry hold the key to understanding certain aspects of massive stars that are largely inaccessible with optical or longer wavelength observations.…
Experimental Search for Neutron to Mirror Neutron Oscillations as an Explanation of the Neutron Lifetime Anomaly
L. J. Broussard, J. L. Barrow, L. DeBeer-Schmitt +15
An unexplained discrepancy persists between "beam" and "bottle" measurements of the neutron lifetime. A new model proposed that conversions of neutrons into mirror neut…