Investigating the Impact of Atomic Data Uncertainties on the Measured Physical Parameters of the Perseus Galaxy Cluster
Accurate atomic data and plasma models are essential for interpreting the upcoming high-quality spectra from missions like XRISM and Athena. Estimating physical quantities, like temperature, abundance, turbulence, and the resonance scattering factor, is highly dependent on the underlying atomic data...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2024-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/ad17be |
| _version_ | 1797301983896403968 |
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| author | Priyanka Chakraborty Rachel Hemmer Adam R. Foster John Raymond Arnab Sarkar Randall Smith Nancy Brickhouse |
| author_facet | Priyanka Chakraborty Rachel Hemmer Adam R. Foster John Raymond Arnab Sarkar Randall Smith Nancy Brickhouse |
| author_sort | Priyanka Chakraborty |
| collection | DOAJ |
| description | Accurate atomic data and plasma models are essential for interpreting the upcoming high-quality spectra from missions like XRISM and Athena. Estimating physical quantities, like temperature, abundance, turbulence, and the resonance scattering factor, is highly dependent on the underlying atomic data. We use the AtomDB tool variableapec to estimate the impact of atomic data uncertainties in Einstein A coefficients, collisional rate coefficients, and the ionization and recombination rates of H-, He-, and Li-like iron in modeling the spectrum of Perseus observed by Hitomi. The best-fit temperatures, abundances, resonance scattering factors, and turbulence parameters including atomic data uncertainties vary by approximately 17%, 35%, 30%, and 3%, respectively, from the best-fit temperatures, abundances, RS factors, and turbulence parameters estimated without atomic data uncertainties. These indicate that approximately 32%, 35%, and 25% of the best-fit temperatures, abundances, and resonance scattering factors when including uncertainties lie outside the 3 σ error regions of their corresponding best-fit values computed with zero atomic data errors. Expanding the energy range to 1.8–20.0 keV shows less variability, with 26% of the abundances and 22% of the resonance scattering factors lying outside the 3 σ errors of the best-fit values. We also studied correlations between physical parameters and atomic rate uncertainties to identify key atomic quantities requiring precise lab measurements. We report negative correlations between the best-fit temperatures and the z (1s2s ^3 S _1 → 1s ^2 ) collisional rate coefficients, abundances and y (1s2p ^3 P _1 → 1s ^2 ) collisional rate coefficients, and abundances and z collisional rate coefficients, and a positive correlation between the resonance scattering factors and the w (1s2p ^1 P _1 → 1s ^2 ) collisional rate coefficients. |
| first_indexed | 2024-03-07T23:29:23Z |
| format | Article |
| id | doaj.art-245e98ef641d4a71a4fc31f045035792 |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-07T23:29:23Z |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-245e98ef641d4a71a4fc31f0450357922024-02-20T16:42:56ZengIOP PublishingThe Astrophysical Journal1538-43572024-01-01962219210.3847/1538-4357/ad17beInvestigating the Impact of Atomic Data Uncertainties on the Measured Physical Parameters of the Perseus Galaxy ClusterPriyanka Chakraborty0https://orcid.org/0000-0002-4469-2518Rachel Hemmer1https://orcid.org/0000-0002-6449-9299Adam R. Foster2https://orcid.org/0000-0003-3462-8886John Raymond3https://orcid.org/0000-0002-7868-1622Arnab Sarkar4https://orcid.org/0000-0002-5222-1337Randall Smith5https://orcid.org/0000-0003-4284-4167Nancy Brickhouse6https://orcid.org/0000-0002-8704-4473Center for Astrophysics | Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA ; priyanka.chakraborty@cfa.harvard.eduBrown University , 182 Hope Street, Box 1843 Providence, RI 02912, USACenter for Astrophysics | Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA ; priyanka.chakraborty@cfa.harvard.eduCenter for Astrophysics | Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA ; priyanka.chakraborty@cfa.harvard.eduDepartment of Physics, Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , Cambridge, MA 02139, USACenter for Astrophysics | Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA ; priyanka.chakraborty@cfa.harvard.eduCenter for Astrophysics | Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA ; priyanka.chakraborty@cfa.harvard.eduAccurate atomic data and plasma models are essential for interpreting the upcoming high-quality spectra from missions like XRISM and Athena. Estimating physical quantities, like temperature, abundance, turbulence, and the resonance scattering factor, is highly dependent on the underlying atomic data. We use the AtomDB tool variableapec to estimate the impact of atomic data uncertainties in Einstein A coefficients, collisional rate coefficients, and the ionization and recombination rates of H-, He-, and Li-like iron in modeling the spectrum of Perseus observed by Hitomi. The best-fit temperatures, abundances, resonance scattering factors, and turbulence parameters including atomic data uncertainties vary by approximately 17%, 35%, 30%, and 3%, respectively, from the best-fit temperatures, abundances, RS factors, and turbulence parameters estimated without atomic data uncertainties. These indicate that approximately 32%, 35%, and 25% of the best-fit temperatures, abundances, and resonance scattering factors when including uncertainties lie outside the 3 σ error regions of their corresponding best-fit values computed with zero atomic data errors. Expanding the energy range to 1.8–20.0 keV shows less variability, with 26% of the abundances and 22% of the resonance scattering factors lying outside the 3 σ errors of the best-fit values. We also studied correlations between physical parameters and atomic rate uncertainties to identify key atomic quantities requiring precise lab measurements. We report negative correlations between the best-fit temperatures and the z (1s2s ^3 S _1 → 1s ^2 ) collisional rate coefficients, abundances and y (1s2p ^3 P _1 → 1s ^2 ) collisional rate coefficients, and abundances and z collisional rate coefficients, and a positive correlation between the resonance scattering factors and the w (1s2p ^1 P _1 → 1s ^2 ) collisional rate coefficients.https://doi.org/10.3847/1538-4357/ad17beX-ray astronomyGalaxy clustersAtomic spectroscopy |
| spellingShingle | Priyanka Chakraborty Rachel Hemmer Adam R. Foster John Raymond Arnab Sarkar Randall Smith Nancy Brickhouse Investigating the Impact of Atomic Data Uncertainties on the Measured Physical Parameters of the Perseus Galaxy Cluster The Astrophysical Journal X-ray astronomy Galaxy clusters Atomic spectroscopy |
| title | Investigating the Impact of Atomic Data Uncertainties on the Measured Physical Parameters of the Perseus Galaxy Cluster |
| title_full | Investigating the Impact of Atomic Data Uncertainties on the Measured Physical Parameters of the Perseus Galaxy Cluster |
| title_fullStr | Investigating the Impact of Atomic Data Uncertainties on the Measured Physical Parameters of the Perseus Galaxy Cluster |
| title_full_unstemmed | Investigating the Impact of Atomic Data Uncertainties on the Measured Physical Parameters of the Perseus Galaxy Cluster |
| title_short | Investigating the Impact of Atomic Data Uncertainties on the Measured Physical Parameters of the Perseus Galaxy Cluster |
| title_sort | investigating the impact of atomic data uncertainties on the measured physical parameters of the perseus galaxy cluster |
| topic | X-ray astronomy Galaxy clusters Atomic spectroscopy |
| url | https://doi.org/10.3847/1538-4357/ad17be |
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