NDLI: Suzaku view of the neutron star in the dipping source 4u 1822-37

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Suzaku view of the neutron star in the dipping source 4u 1822-37

Content Provider	NASA Technical Reports Server (NTRS)
Author	Zhang, Zhongli Sasano, Makoto Enoto, Teruaki Sakurai, Soki Makishima, Kazuo
Copyright Year	2013
Description	The dipping X-ray source 4U 1822â37 was observed by Suzaku on 2006 Octrober 20 for a net exposure of 37 ks. The source was detected with the XIS at a 1-10 keV flux of 5.5 Ã10(exp â10) erg per square centimeter per second, and with the HXD (HXD-PIN) at a 10-50 keV flux of 8.9 Ã10(exp â10) erg per square centimeter per second. With HXD-PIN, the pulsation was detected at a barycentric period of 0.592437 seconds, and its change rate was reconfirmed as â2.43 Ã 10(exp â12) seconds per second. The 1-50 keV spectra of 4U 1822-37 were found to be very similar to those of Her X- 1 in the slopes, cutoff and iron lines. Three iron lines (Fe Kalpha, Fe XXV, and Fe XXVI) were detected, on top of a 1-50 keV continuum that is described by an NPEX model plus a soft blackbody. In addition, a cyclotron resonance scattering feature was detected significantly ( greater than 99% confidence), at an energy of 33+/-2 keV with a depth of 0.4(sup +0.6)/(sub â0.3). Therefore, the neutron star in this source is concluded to have a strong magnetic field of 2.8 Ã 10(exp 12) G. Further assuming that the source has a relatively high intrinsic luminosity of several times 10(exp 37) erg per second, its spectral and timing properties are consistently explained.
File Size	624547
Page Count	14
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20150011658
Archival Resource Key	ark:/13960/t9479d066
Language	English
Publisher Date	2013-11-19
Access Restriction	Open
Subject Keyword	Stars: Magnetic Field X-rays Accretion Neutron Stars Binary Stars Cyclotron Resonance Light Curve Line Spectra Magnetic Fields Detection Data Reduction X Ray Sources Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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