RXTE Studies of Hard X-ray Spectra of Ultra-compact LMXBs

Details RXTE Studies of Hard X-ray Spectra of Ultra-compact LMXBs RXTE Studies of Hard X-ray Spectra of Ultra-compact LMXBs

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aas...19111003b&link_type=abstract

American Astronomical Society, 191st AAS Meeting, #110.03; Bulletin of the American Astronomical Society, Vol. 29, p.1387

Astronomy and Astrophysics

Astronomy

Scientific paper

We present initial results of a study of the continuum x-ray spectra (2-100 keV) of low mass x-ray binaries (LMXBs) in which the neutron star (NS) primary accretes from a white dwarf (WD) secondary. Two such ultra-compact LMXBs have been observed with RXTE: 4U1916-05, a 50-min binary period system in the galactic disk, and 4U1820-30, the 11-min binary in the core of the globular cluster NGC 6624. Both are x-ray bursters and both systems show long-term variations (with possible periods of ~ 199d and 176d, respectively) of their 2-10 keV flux. Our RXTE spectral studies are designed to measure: i) the continuum spectrum and the spectral break energy, E_b, of the hard x-ray tail, ii) the variation of the measured spectral parameters with both orbital and long-term phase, and iii) the dependence of the hard x-ray spectral component and break energy E_b on total flux and accretion rate. Data from the PCA and HEXTE detectors are used to constrain spectral fits, while ASM data provide long-term intensity state monitoring. Results from our long-term study of 4U1916-05 will be presented in some detail, and compared with our initial results for 4U1820-30, in an effort to constrain the origin of hard x-ray emission in LMXBs.

Affiliated with

Also associated with

No associations

Rating

RXTE Studies of Hard X-ray Spectra of Ultra-compact LMXBs 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 RXTE Studies of Hard X-ray Spectra of Ultra-compact LMXBs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and RXTE Studies of Hard X-ray Spectra of Ultra-compact LMXBs will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1177676