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William T. Reach
Researcher at Universities Space Research Association
Publications - 545
Citations - 95523
William T. Reach is an academic researcher from Universities Space Research Association. The author has contributed to research in topics: Galaxy & Interstellar medium. The author has an hindex of 131, co-authored 535 publications receiving 90496 citations. Previous affiliations of William T. Reach include California Institute of Technology & Space Telescope Science Institute.
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Journal ArticleDOI
Understanding polarized dust emission from $\rho$ Ophiuchi A in light of grain alignment and disruption by radiative torques
Le Ngoc Tram,Thiem Hoang,Hye Seung Lee,Fabio P. Santos,Archana Soam,Pierre Lesaffre,Antoine Gusdorf,William T. Reach +7 more
TL;DR: In this article, the authors used the archival SOFIA/HAWC+ polarimetric data observed toward Ophiuchus (Oph) A cloud hosted by a B association star at 89 and 154 µm and found that the fractional polarization of thermal dust emission first increases with grain temperature and then decreases once the grain temperature exceeds µm 25-32 K. The latter trend differs from the prediction of the popular RAdiative Torques (RATs) alignment theory which implies a monotonic increase of the polarization fraction with thegrain temperature.
Journal ArticleDOI
Mid-infrared photometric analysis of main belt asteroids: a technique for color-color differentiation from background astrophysical sources
Bidushi Bhattacharya,Alberto Noriega-Crespo,Bryan E. Penprase,Vikki Meadows,Mara Salvato,H. Aussel,David T. Frayer,Olivier Ilbert,E. Le Floc'h,D. Looper,Jason Surace,Peter Capak,Jon D. Giorgini,Mikael Granvik,Carl J. Grillmair,Alex Hagen,George Helou,William T. Reach,Luisa Rebull,D. B. Sanders,Nick Scoville,Kartik Sheth,Lin Yan +22 more
TL;DR: In this article, an infrared color discrimination tool was used to distinguish between solar system objects and extrasolar sources using the First Look Survey-Ecliptic Plane Component (FLS-EPC) data set.
Journal ArticleDOI
SOFIA Infrared Spectrophotometry of Comet C/2012 K1 (Pan-STARRS)
Charles E. Woodward,Michael S. P. Kelley,David E. Harker,Erin L. Ryan,Diane H. Wooden,Michael L. Sitko,Ray W. Russell,William T. Reach,Imke de Pater,Ludmilla Kolokolova,Robert D. Gehrz +10 more
TL;DR: Pan-STARRS (Pan-2012 K1) as discussed by the authors is a dynamically new Oort Cloud comet, conducted with NASA's Stratospheric Observatory for Infrared Astronomy facility (+FORCAST) in 2014 June.
Proceedings ArticleDOI
Exclusion of Tiny Interstellar Dust Grains from the Heliosphere
Jonathan D. Slavin,Priscilla C. Frisch,Jacob Heerikhuisen,Nikolai V. Pogorelov,Hans R. Mueller,William T. Reach,Gary P. Zank,Brahmananda Dasgupta,K. Avinash +8 more
TL;DR: In this article, the authors present new calculations of grain trajectories and the resultant grain density distribution for small ISDGs propagating through the heliosphere, using three-dimensional (3-D) magnetohydrodynamic/kinetic models designed to match data on the shape of the termination shock and the relative deflection of interstellar neutral H and He flowing into the helIosphere.