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Carbon X-ray absorption in the local ISM: Fingerprintsin X-ray Novae spectra

Gatuzz, Efraín and Ness, J.-U. and Gorczyca, T. W. and Hasoglu, M. F. and Kallman, Timothy R. and García, Javier A. (2018) Carbon X-ray absorption in the local ISM: Fingerprintsin X-ray Novae spectra. Monthly Notices of the Royal Astronomical Society, 479 (2). pp. 2457-2463. ISSN 0035-8711. doi:10.1093/mnras/sty1517.

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We present a study of the C K-edge using high-resolution LETGS Chandraspectra of four novae during their super-soft-source (SSS) phase. We identified absorption lines due to C II Kα, C III Kα, and C III Kβ resonances. We used these astronomical observations to perform a benchmarking of the atomic data, which involves wavelength shifts of the resonances and photoionization cross-sections. We used improved atomic data to estimate the C II and C III column densities. The absence of physical shifts for the absorption lines, the consistence of the column densities between multiple observations, and the high temperature required for the SSS nova atmosphere modelling support our conclusion about an interstellar medium origin of the respective absorption lines. Assuming a collisional ionization equilibrium plasma the maximum temperature derived from the ratio of C II/C III column densities of the absorbers correspond to T_(max) < 3.05 × 10^4 K.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Gatuzz, Efraín0000-0002-3252-9633
Kallman, Timothy R.0000-0002-5779-6906
García, Javier A.0000-0003-3828-2448
Additional Information:© 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model ( Accepted 2018 June 4. Received 2018 June 4; in original form 2018 February 1. Published: 11 June 2018. We are grateful to the referee, Dr. Lia Corrales, for the careful reading of our manuscript and the valuable comments that led to improvements of its scientific content.
Subject Keywords:ISM: atoms – ISM: structure –X-rays: ISM
Issue or Number:2
Record Number:CaltechAUTHORS:20180829-161431338
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Official Citation:Efraín Gatuzz, J-U Ness, T W Gorczyca, M F Hasoglu, Timothy R Kallman, Javier A García; Carbon X-ray absorption in the local ISM: Fingerprintsin X-ray Novae spectra, Monthly Notices of the Royal Astronomical Society, Volume 479, Issue 2, 11 September 2018, Pages 2457–2463,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:89292
Deposited By: Tony Diaz
Deposited On:29 Aug 2018 23:20
Last Modified:16 Nov 2021 00:34

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