abund ⚬ˣˢᵖᵉᶜ Entries

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abund ⚬ˣˢᵖᵉᶜ｜docu｜1st｜20260111172504-00-⌔

abund

abund

set the solar abundances

Set the abundance table for elements up to Zinc (Z=30) used in the plasma emission and photoelectric absorption models, in linear ratios to Hydrogen. The tables used are derived from various papers, most of which quote the log base ten abundance with Hydrogren set at 12. The table from Lodders et al 2009 for the proto-solar values gives the values normalized to N(Si), which are normalized to Hydrogen before calculating the linear ratio. The default abundance table in Xspec is Anders E. & Grevesse N., 1989 (angr).

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where is:

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If no is given, the abund command reports which abundance table is currently in use.

The tables are:

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Examples:

XSPEC12>abund
angr:  Anders E. & Grevesse N. Geochimica et Cosmochimica Acta 53, 197 (1989)
XSPEC12>abund ?
Change/Report the solar abundance table in use
   Syntax: abund [ feld | angr | aneb | grsa | wilm | lodd | aspl | lpgp | lpgs ]
           abund file </path/to/filename>
           (define & load new vector from data in <filename>)
XSPEC12>abund lodd
Solar Abundance Vector set to lodd:  Lodders, K. ApJ 591, 1220 (2003)
XSPEC12>abund
lodd:  Lodders, K. ApJ 591, 1220 (2003)

Printed 2026-06-28.

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