IPOPv2 online service for the generation of opacity tables

TL;DR

The paper introduces IPOPv2, a web service for generating opacity tables based on the latest Opacity Project data, facilitating comparison with OPAL data and aiding stellar modeling.

Contribution

It presents a new online tool for creating opacity tables from OP data, supporting multi-element mixtures and enabling direct comparison with OPAL opacities.

Findings

Provides tables of Rosseland mean opacities using OP atomic data

Enables comparison between OP and OPAL opacity datasets

Supports multi-element mixtures for stellar modeling

Abstract

In the framework of the present phase -- IPOPv2 -- of the international Opacity Project (OP), a new web service has been implemented based on the latest release of the OP opacities. The user may construct online opacity tables to be conveniently included in stellar evolution codes in the format most commonly adopted by stellar physicists, namely the OPAL format. This facility encourages the use and comparison of both the OPAL and OP data sets in applications. The present service allows for the calculation of multi-element mixtures containing the 17 species (H, He, C, N, O, Ne, Na, Mg, Al, Si, S, Ar, Ca, Cr, Mn, Fe and Ni) considered by the OP, and underpins the latest release of OP opacities. This new service provides tables of Rosseland mean opacites using OP atomic data. We provide an alternative to the OPAL opacity services allowing direct comparison as well as study of the effect of uncertainties in stellar modeling due to mean opacities.