AbsorbLines: Galaxy Absorption Lines

In asgr/ProSpect: Professional Spectral Analysis Package

Galaxy Absorption Lines

Description

Significant Optical and NIR Galaxy Absorption Lines. This covers the famous A-K Fraunhofer lines, as well as other hydrogen and oxygen elemental lines.

Usage

data("AbsorbLines")

Format

A data frame with 47 observations on the following 5 variables.

wave

Numeric; wavelength (Ang)

width

Numeric; feature width (Ang)

element

Character; name of atomic element.

state

Character; atomic state (neutral line = I, single ionised = II, double ionised = III etc).

fraunhofer

Character; Fraunhofer label if relevant. These are only labelled C-K (A and B are not within the range listed here, and are terrestrial oxygen anyway).

Details

The list of absorption features listed here is not necessarily comprehensive, but it covers many of the common lines seen in galaxy spectra. Note the G-band (sometimes stylised as the g-band) is not a single feature, rather a complex of methane (CH), iron (Fe) and hydrogen (H-delta). Only very high resolution data tends to separate out the various components. The dominated calcium H-band is also shared with the hydrogen feature (H-episilon).

Source

Various online material (pretty standard list).

Examples

data(AbsorbLines)

# The famous Calcium HK doublet:
AbsorbLines[AbsorbLines$fraunhofer == 'H',]
AbsorbLines[AbsorbLines$fraunhofer == 'K',]

asgr/ProSpect documentation built on Feb. 21, 2025, 1:43 a.m.