The Ionized Stellar Wind in Vela X-1 during Eclipse
Name
Canizares_Ionized stellar.pdf
Size
343.39 KB
Format
Adobe PDF
Checksum (MD5)
62861e684c0c858e52c80f611f94e9e2
Author(s)
Schulz, Norbert S.
Canizares, Claude R.
Sako, Masao
Lee, J.
Date Issued
December 2001
Journal
Astrophysical Journal. Letters
Publisher
IOP Publishing
Citation
Schulz, Norbert S. et al. “The Ionized Stellar Wind in Vela X-1 During Eclipse.” The Astrophysical Journal 564.1 (2002): L21–L25.
Version
Author's final manuscript
Abstract
We present a first analysis of a high-resolution X-ray spectrum of the ionized stellar wind of Vela X-1 during eclipse. The data were obtained with the High-Energy Transmission Grating Spectrometer on board the Chandra X-Ray Observatory. The spectrum is resolved into emission lines with fluxes between 0.02 and 1.04 × 10[superscript -4] photons cm[superscript -2] s[superscript -1]. We identify lines from a variety of charge states, including fluorescent lines from cold material and a warm photoionized wind. We can exclude signatures from collisionally ionized plasmas. For the first time, we identify fluorescent lines from L-shell ions from lower Z elements. We also detect radiative recombination continua from a kT = 10 eV (1.2 × 10[superscript 5] K) photoionized optically thin gas. The fluorescent line fluxes imly the existence of optically thick and clumped matter within or outside the warm photoionized plasma.
MIT Department
MIT Kavli Institute for Astrophysics and Space Research
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1086/338862
