Spectroscopic Families Among Diffuse Interstellar Bands

TL;DR

This study analyzes high-resolution optical spectra to identify potential spectroscopic families among diffuse interstellar bands, aiming to understand their carriers by grouping DIBs based on their correlations.

Contribution

It introduces a method to identify spectroscopic families of DIBs using high-resolution spectra, proposing initial groupings based on correlation analysis.

Findings

Identified a few strong DIBs not well correlated, suggesting they belong to separate families.

Proposed several spectroscopic families of DIBs based on correlation patterns.

Indicated DIBs that tend to follow the behavior of their representatives.

Abstract

Looking for spectroscopic families in the whole set of discovered diffuse interstellar bands (DIBs) is an indirect trial of solving the problem of DIBs' carriers. Basing on optical high resolution spectra, covering the range from 5655 to 7020 \AA, we found few relatively strong DIBs which are not well correlated one with another and therefore they may play a role of representatives of separate spectroscopic families. In the next step we indicated DIBs which tend to follow the behaviour of their representatives. As a result of our analysis we propose few, probably not complete yet, spectroscopic families of DIBs.