The Herschel SPIRE Fourier Transform Spectrometer Spectral Feature Finder II. Estimating Radial Velocity of SPIRE Spectral Observation Sources

TL;DR

This paper presents methods for estimating the radial velocity of sources in SPIRE spectral observations using spectral feature detection and cross-correlation techniques, validated within the Herschel SPIRE FTS Spectral Feature Finder framework.

Contribution

It introduces and validates two routines for radial velocity estimation in SPIRE spectra, enhancing spectral analysis capabilities.

Findings

Validated routines for radial velocity estimation.

Effective identification of spectral features in SPIRE data.

Integration of external references improves accuracy.

Abstract

The Herschel SPIRE FTS Spectral Feature Finder (FF) detects significant spectral features within SPIRE spectra and employs two routines, and external references, to estimate source radial velocity. The first routine is based on the identification of rotational CO emission, the second cross-correlates detected features with a line template containing most of the characteristic lines in typical far infra-red observations. In this paper, we outline and validate these routines, summarise the results as they pertain to the FF, and comment on how external references were incorporated.