Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mit..reptq....c&link_type=abstract
Final Report Massachusetts Inst. of Tech., Cambridge. Center for Space Research.
Astronomy and Astrophysics
Astrophysics
Astrophysics, Companion Stars, Cosmic Dust, Eclipsing Binary Stars, Interstellar Matter, Planetary Atmospheres, X Ray Sources, Computer Programs, Computerized Simulation, Early Stars, Massive Stars, Monte Carlo Method, Pulsars
Scientific paper
This investigation was aimed at determining structural features of the atmospheres of the massive early-type companion stars of eclipse x-ray pulsars by measurement of the attenuation of the x-ray spectrum during eclipse transitions and in deep eclipse. Several extended visits were made to ISAS in Japan by G. Clark and his graduate student, Jonathan Woo to coordinate the Ginga observations and preliminary data reduction, and to work with the Japanese host scientist, Fumiaki Nagase, in the interpretation of the data. At MIT extensive developments were made in software systems for data interpretation. In particular, a Monte Carlo code was developed for a 3-D simulation of the propagation of x-rays from the neutron star through the ionized atmosphere of the companion. With this code it was possible to determine the spectrum of Compton-scattered x-rays in deep eclipse and to subtract that component from the observed spectra, thereby isolating the software component that is attributable in large measure to x-rays that have been scattered by interstellar grains. This research has culminated in the submission of paper to the Astrophysical Journal on the determination of properties of the atmosphere of QV Nor, the BOI companion of 4U 1538-52, and the properties of interstellar dust grains along the line of sight from the source. The latter results were an unanticipated byproduct of the investigation. Data from Ginga observations of the Magellanic binaries SMC X-1 and LMC X-4 are currently under investigation as the PhD thesis project of Jonathan Woo who anticipated completion in the spring of 1993.
No associations
LandOfFree
The atmospheric structures of the companion stars of eclipsing binary X ray sources does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The atmospheric structures of the companion stars of eclipsing binary X ray sources, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The atmospheric structures of the companion stars of eclipsing binary X ray sources will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1138855