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The XSTAR Atomic Database

Mendoza, Claudio and Bautista, Manuel A. and Deprince, Jérôme and García, Javier A. and Gatuzz, Efraín and Gorczyca, Thomas W. and Kallman, Timothy R. and Palmeri, Patrick and Quinet, Pascal and Witthoeft, Michael C. (2021) The XSTAR Atomic Database. Atoms, 9 (1). Art. No. 12. ISSN 2218-2004.

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We describe the atomic database of the xstar spectral modeling code, summarizing the systematic upgrades carried out in the past twenty years to enable the modeling of K-lines from chemical elements with atomic number Z≤30 and recent extensions to handle high-density plasmas. Such plasma environments are found, for instance, in the inner region of accretion disks round compact objects (neutron stars and black holes), which emit rich information about the system’s physical properties. Our intention is to offer a reliable modeling tool to take advantage of the outstanding spectral capabilities of the new generation of X-ray space telescopes (e.g., xrism and athena) to be launched in the coming years. Data curatorial aspects are discussed and an updated list of reference sources is compiled to improve the database provenance metadata. Two xstar spin-offs—the ISMabs absorption model and the uaDB database—are also described.

Item Type:Article
Related URLs:
URLURL TypeDescription
Mendoza, Claudio0000-0002-2854-4806
Bautista, Manuel A.0000-0002-5522-9705
Deprince, Jérôme0000-0002-3409-8232
García, Javier A.0000-0003-3828-2448
Gatuzz, Efraín0000-0002-3252-9633
Gorczyca, Thomas W.0000-0003-4117-5790
Kallman, Timothy R.0000-0002-5779-6906
Palmeri, Patrick0000-0002-4372-6798
Quinet, Pascal0000-0002-3937-2640
Witthoeft, Michael C.0000-0001-6237-7776
Additional Information:© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( Received: 3 December 2020 / Revised: 21 January 2021 / Accepted: 27 January 2021 / Published: 5 February 2021. (This article belongs to the Special Issue Development and Perspectives of Atomic and Molecular Databases) We are grateful to Anil. K. Pradhan (Ohio State University) for access to and space-time allocation at the Ohio Supercomputer Center and also to the NASA Private Cloud at GSFC for access and virtual machine installation, especially to Michael D. Moore for invaluable support. J.D. is a Research Fellow of the Belgian Fund for Research in Industry and Agriculture (FRIA). P.P. & P.Q. are, respectively, Research Associate and Research Director of the Belgian Fund for Scientific Research F.R.S.–FNRS. Financial support from these organizations as well as from the NASA Astrophysics Research and Analysis Program (grants 12-APRA12-0070; 80NSSC17K0345; and 80NSSC19K0586) and the Alexander von Humboldt Foundation are gratefully acknowledged. Author Contributions. Conceptualization, C.M., M.A.B. and T.R.K.; methodology, C.M., E.G., J.A.G., J.D., M.A.B., M.C.W., P.P., P.Q., T.R.K. and T.W.G.; software, C.M., E.G., J.A.G., M.A.B., M.C.W., P.P., T.R.K. and T.W.G.; validation, J.A.G., M.A.B., P.P. and T.R.K.; formal analysis, C.M., E.G., J.A.G., J.D., M.A.B., M.C.W., P.P., P.Q., T.R.K. and T.W.G.; investigation, C.M., E.G., J.A.G., J.D., M.A.B., M.C.W., P.P. and T.R.K.; validation, C.M., M.A.B., P.P. and T.R.K.; resources, M.A.B., P.Q., T.R.K.; data curation, C.M., M.A.B., P.P. and T.R.K.; writing—original draft preparation, C.M., E.G., M.C.W. and T.R.K.; writing—review and editing, C.M., E.G., J.A.G., J.D., M.A.B., M.C.W., P.P., P.Q., T.R.K. and T.W.G.; visualization, C.M., M.C.W. and T.R.K; supervision, T.R.K.; project administration, M.A.B., P.Q. T.R.K.; funding acquisition, J.A.G., P.P., P.Q. and T.R.K. All authors have read and agreed to the published version of the manuscript. Data Availability Statement. The xstar modeling code, the uaDB database, and the ISMabs model are available from the website of the NASA High Energy Astrophysics Science Archive Research Center (HEASARC, The authors declare no conflict of interest.
Funding AgencyGrant Number
Fonds pour la Formation à la Recherche dans l’Industrie et dans l’Agriculture (FRIA-Belgium)UNSPECIFIED
Fonds de la Recherche Scientifique (FNRS)UNSPECIFIED
Alexander von Humboldt FoundationUNSPECIFIED
Subject Keywords:XSTAR; atomic databases; atomic processes; line formation; X-rays; high-density plasmas
Issue or Number:1
Record Number:CaltechAUTHORS:20210208-140557446
Persistent URL:
Official Citation:Mendoza C, Bautista MA, Deprince J, García JA, Gatuzz E, Gorczyca TW, Kallman TR, Palmeri P, Quinet P, Witthoeft MC. The XSTAR Atomic Database. Atoms. 2021; 9(1):12.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:107954
Deposited By: George Porter
Deposited On:08 Feb 2021 22:21
Last Modified:08 Feb 2021 22:21

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