Vol 22, No 8

HI Vertical Structure of Nearby Edge-on Galaxies from CHANG-ES

Yun Zheng, Jing Wang, Judith Irwin, Q. Daniel Wang, Jiangtao Li et al.


We study the vertical distribution of the highly inclined galaxies from the Continuum Halos in Nearby Galaxies— an EVLA Survey (CHANG-ES). We explore the feasibility of photometrically deriving the H I disk scale heights from the moment-0 images of the relatively edge-on galaxies with inclination >80°, by quantifying the systematic broadening effects and thus deriving correction equations for direct measurements. The corrected H I disk scale heights of the relatively edge-on galaxies from the CHANG-ES sample show trends consistent with the quasiequilibrium model of the vertical structure of gas disks. The procedure provides a convenient way to derive the scale heights and can easily be applied to statistical samples in the future.


galaxies: ISM – galaxies: spiral – galaxies: structure

Full Text

There are currently no refbacks.