Catherine Zucker edited sectionMethdology_To.tex  about 9 years ago

Commit id: 17201c721619b81dcb19d37be31166a185aa3bd0

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\item{Within 20 pc of the physical Galactic mid-plane, assuming a flat galaxy}  \item{Within 10 km/s of the global-log spiral fit to any Milky Way arm}  \item{No abrupt shifts in velocity (of more than ~3 km/s per 10 pc) within extinction feature}  \item{Projected aspect ratio $\ge 50:1$} \end{enumerate}  The name and coordinates for these ten filaments, along with their "nicknames", average LSR velocities, the number of bone criteria they satisfy, and their key defining features, are listed in figure \ref{fig:candidates}. In figure \ref{fig:mass_of_bones}, we summarize physical parameters for all ten bone candidates, including estimates of distance, volume, mass, and aspect ratio. We calculate mass by \textit{estimating} an average H$_2$ column density of $2\rm{E}22 \rm{cm}^{-2}$), consistent with the minimum IRDC peak column density to be included in the \citet{Peretto_2009} catalog of 11,303 IRDCs. We plan to directly measure this quantity in follow-up studies, using the 8 $\mu\textrm{m}$ imaging data from the GLIMPSE survey to create column density and temperature maps for our candidates.