# Probing the infrared counterparts of diffuse far-ultraviolet sources in the Galaxy

## TL;DR

This study analyzes the correlation between infrared and ultraviolet emissions in diffuse Galactic regions to identify dust components responsible for FUV emission, utilizing archival data from multiple space telescopes.

## Contribution

It provides new insights into the relationship between different dust populations and FUV emission by comparing IR and UV data at various Galactic latitudes.

## Key findings

- Identification of dust components responsible for diffuse FUV emission.
- Establishment of correlations between IR features and FUV sources.
- Differentiation of dust behavior at low and high Galactic latitudes.

## Abstract

Recent availability of high quality infrared (IR) data for diffuse regions in the Galaxy and external galaxies have added to our understanding of interstellar dust. A comparison of ultraviolet (UV) and IR observations may be used to estimate absorption, scattering and thermal emission from interstellar dust. In this paper, we report IR and UV observations for selective diffuse sources in the Galaxy. Using archival mid-infrared (MIR) and far-infrared (FIR) observations from Spitzer Space Telescope, we look for counterparts of diffuse far-ultraviolet (FUV) sources observed by the Voyager, Far Ultraviolet Spectroscopic Explorer (FUSE) and Galaxy Evolution Explorer (GALEX) telescopes in the Galaxy. IR emission features at 8micron are generally attributed to Polycyclic Aromatic Hydrocarbon (PAH) molecules, while emission at 24micron are attributed to Very Small Grains (VSGs). The data presented here is unique and our study tries to establish a relation between various dust populations. By studying the FUV-IR correlations separately at low and high latitude locations, we have identified the grain component responsible for the diffuse FUV emission.