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dc.contributor.advisorFinkbeiner, Douglas P.
dc.contributor.advisorManoharan, Vinothan
dc.contributor.advisorOberg, Karin
dc.contributor.authorLee, Albert
dc.date.accessioned2019-05-20T12:24:14Z
dc.date.created2018-05
dc.date.issued2018-05-15
dc.date.submitted2018
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:40050157*
dc.description.abstractWe present a simple but effective technique for measuring angular variation in R_V across the sky. We divide stars from the Pan-STARRS catalog into Healpix pixels and determine the posterior distribution of reddening and R_V for each pixel using two independent Monte Carlo methods. We find the two methods to be self-consistent in the limits where they are expected to perform similarly. We also find some agreement with high-precision photometric studies of R_V in Perseus and Ophiuchus, as well as with a map of reddening near the galactic plane based on stellar spectra from APOGEE. While current studies of R_V are mostly limited to isolated clouds, we have developed a systematic method for comparing R_V values for the majority of observable dust. This is a proof of concept for a more rigorous galactic reddening map. We also present a method for inferring the three dimensional variation in dust temperature. By combining extinction information from Bayestar17 and emission information from Planck and SFD, we fit a graybody model to each Healpix pixel and generate a map covering 3π steradians and distances from 0.06 kpc to 25 kpc. We compare these results to the above maps of R_V and show that it is possible to probe the physics and composition of interstellar dust by applying simple models to large data sets.
dc.description.sponsorshipPhysics
dc.format.mimetypeapplication/pdf
dc.language.isoen
dash.licenseLAA
dc.subjectPhysics, Astronomy and Astrophysics
dc.titleMapping the Relationship Between Interstellar Dust and Radiation in the Milky Way
dc.typeThesis or Dissertation
dash.depositing.authorLee, Albert
dc.date.available2019-05-20T12:24:14Z
thesis.degree.date2018
thesis.degree.grantorGraduate School of Arts & Sciences
thesis.degree.levelDoctoral
thesis.degree.nameDoctor of Philosophy
dc.type.materialtext
thesis.degree.departmentPhysics
dash.identifier.vireohttp://etds.lib.harvard.edu/gsas/admin/view/2368
dc.description.keywordsinterstellar medium; interstellar dust; photometry; galactic structure; data analysis
dc.identifier.orcid0000-0002-1441-770X
dash.author.emailalberthjlee@gmail.com


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