We present a study S K-edge using high-resolution HETGS { \it Chandra} spectra of 36 low-mas X-ray binaries. For each source, we have estimated column densities for { \rm S}~{ \sc i}, { \rm S}~{ \sc ii}, { \rm S}~{ \sc iii}, { \rm S}~{ \sc xiv}, { \rm S}~{ \sc xv} and { \rm S}~{ \sc xvi} ionic species, which trace the neutral, warm and hot phases of the Galactic interstellar medium. We also estimated column densities for a sample of interstellar dust analogs. We measured their distribution as a function of Galactic latitude, longitude, and distances to the sources. While the cold-warm column densities tend to decrease with the Galactic latitude, we found no correlation with distances or Galactic longitude. This is the first detailed analysis of the sulfur K-edge absorption due to ISM using high-resolution X-ray spectra.
Categories: astro-ph.HE astro-ph.IM