Other
Scientific paper
Nov 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...274..313m&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 274, Nov. 1, 1983, p. 313-326.
Other
33
Binary Stars, Infrared Spectra, Infrared Stars, Pulsars, Stellar Oscillations, X Ray Sources, Bremsstrahlung, Companion Stars, Orbital Elements, Power Spectra, Stellar Atmospheres, Stellar Temperature, Supernova Remnants
Scientific paper
The spectrum of the pulsed optical and infrared flux from HZ Her has been measured to be flat by simultaneous observations with the NASA IRTF 3.0-m and the Lick Crossley 91-cm telescopes. The pulsed fluxes in the 3200-7500-A bandpass and the 1.0-2.5-micron bandpass were both measured to be consistent with 27 micro-Jy and indicate that the reprocessed pulsation spectrum may be optically thin thermal-bremsstrahlung radiation, modulated in intensity. However, the temperature required for a good fit is greater than or equal to 30,000 K. The results of a search for periodic infrared pulsations from other X-ray and radio pulsars, supernova remnants, and the galactic center source IRS 16 are also reported. The possible detection of 3.5-s infrared pulsations from the X-ray binary pulsar 1E 2259 + 586 is reported. The 285-7-mHz infrared pulsation frequency from 1E 2259 + 586 is consistent with the 286.6-mHz second-harmonic X-ray pulsations reprocessed from a companion star in the close binary orbit whose period has been tentatively established to be about 2300 s.
Burns Maurice S.
Middleditch John
Pennypacker Carl R.
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