X-ray Lines in Binary Star Systems and the 3.55-keV Anomaly

Journal Article · Mon Jul 15 04:00:00 EDT 2019 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776119060116· OSTI ID:22917718

A close binary star system that consists of a red giant and a neutron star is considered. X-ray emission from H-like Si XIV emerges during its recombination in the magnetic column of a neutron star with a superstrong magnetic field. The L{sub α} Si XIV line with an energy of 3.55 keV is formed in a magnetic field of 6 × 10{sup 22} G. The identification of this line in the X-ray spectrum is discussed. The detection of L{sub α} emission features during the recombination of such ions as C VI, N VII, O VIII, Ne X, Mg XII, S XVI, Ca XX, and Fe XXVI is predicted at energies both below and above 3.55 keV. A table for the energies in the L{sub α} line for these ions in magnetic fields from 4 × 10{sup 12} to 10{sup 13} G is presented. The presence of anisotropy in the line emission is emphasized. It is shown that the realization of a recombination laser is possible and, as a consequence, the detection of these X-ray features up to redshifts z ≤ 100 is probable, although this will already be the ultraviolet range. It is noted that in the presence of a laser, line narrowing is inevitable.

• OSTI ID: 22917718
• Journal Information: Journal of Experimental and Theoretical Physics, Journal Name: Journal of Experimental and Theoretical Physics Journal Issue: 1 Vol. 129; ISSN JTPHES; ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
BINARY STARS
EMISSION
KEV RANGE 01-10
LASER RADIATION
LYMAN LINES
MAGNETIC FIELDS
NEUTRON STARS
RECOMBINATION
SILICON
ULTRAVIOLET RADIATION
X-RAY SPECTRA