VAMDC as a Resource for Atomic and Molecular Data and the New Release of VALD

TL;DR

The paper discusses the VAMDC infrastructure for atomic and molecular data sharing and introduces the new VALD-3 database release, which includes improved data sets and user features for spectroscopy and astrophysics research.

Contribution

It presents the current status of VAMDC and details the enhancements in the VALD-3 database, including new data and improved distribution systems.

Findings

VALD-3 offers new atomic data for spectroscopy and opacity calculations.

Enhanced data distribution and referencing systems improve user experience.

VALD-3 includes data for diatomic molecules.

Abstract

The Virtual Atomic and Molecular Data Centre (VAMDC) (M.L. Dubernet et al. 2010, JQSRT 111, 2151) is an EU-FP7 e-infrastructure project devoted to building a common electronic infrastructure for the exchange and distribution of atomic and molecular data. It involves two dozen teams from six EU member states (Austria, France, Germany, Italy, Sweden, United Kingdom) as well as Russia, Serbia, and Venezuela. Within VAMDC scientists from many different disciplines in atomic and molecular physics collaborate with users of their data and also with scientists and engineers from the information and communication technology community. In this presentation an overview of the current status of VAMDC and its capabilities will be provided. In the second part of the presentation I will focus on one of the databases which have become part of the VAMDC platform, the Vienna Atomic Line Data Base (VALD). VALD has developed into a well-known resource of atomic data for spectroscopy particularly in astrophysics. A new release, VALD-3, will provide numerous improvements over its predecessor. This particularly relates to the data contents where new sets of atomic data for both precision spectroscopy (i.e., with data for observed energy levels) as well as opacity calculations (i.e., with data involving predicted energy levels) have been included. Data for selected diatomic molecules have been added and a new system for data distribution and data referencing provides for more convenience in using the upcoming third release of VALD.