Zobrazeno 1 - 10
of 38
pro vyhledávání: '"I. R. Tuohy"'
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 265:926-940
We report the discovery of a cataclysmic variable that was detected as an X-ray source by the HEAO-1 modulation collimator. The spectrum is typical of a weak-lined nova-like system, with moderately strong He II λ4686-A emission (∼0.3 Hβ) and a ve
Autor:
I. R. Tuohy, Ron Remillard, David A. Schwartz, Roger Brissenden, E. Rosenthal, D. A. H. Buckley
Publikováno v:
The Astrophysical Journal. 396:668
The evolution of the emission-line Star S-154, between February and December 1988, from a low-excitation 'Fe II star' into a high-excitation state that resembles symbiotic stars, is traced. It is inferred that the spectral type of central stars do no
Autor:
D. A. H. Buckley, I. R. Tuohy
Publikováno v:
The Astrophysical Journal. 349:296
Optical spectroscopic and photometric observations of the hard X-ray-emitting HEAO 1 cataclysmic variable, H0534 - 581 are discussed. From the analysis of Exosat time series data, spectroscopic periods at 6 and 2.1 hr are identified as the orbital an
Autor:
I. R. Tuohy
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 174:45P-50P
The 4.8 second X-ray pulsations from Centaurus X-3 were monitored by the MSSL collimated proportional counter on board Ariel-5 between 18-27 January 1975. Analysis of the source Doppler effect shows that the pulsation period of Cen X-3 decreased by 3
Publikováno v:
Symposium - International Astronomical Union. 101:559-565
We report the optical identification of four Balmer-dominated supernova remnants (SNRs) in the Large Magellanic Cloud. Both the Balmer-dominated spectra and the presence of a broad Hα component in one remnant can be understood in terms of a very hig
Publikováno v:
Astrophysics and Space Science. 131:601-606
Publikováno v:
Publications of the Astronomical Society of Australia. 6:186-194
A broad-band (2-190 keV) Australian X-ray satellite could provide a spectral sensitivity substantially better than HEAO-1 or any presently approved spacecraft. It would be virtually unique by providing simultaneously data over a wide energy range wit
Publikováno v:
Symposium - International Astronomical Union. 101:541-549
Optical identifications of 32 X-ray sources in the Magellanic Clouds confirm that they are SNRs. They are separated into four classes: the evolved, the oxygen-rich, the Balmer-dominated and the Crab-like. High velocity HI emission is observed from an
The Peculiar X-ray Morphology of the SNR G292.0+1.8 : Evidence for an Asymmetric Supernova Explosion
Autor:
D. H. Clark, I. R. Tuohy
Publikováno v:
Symposium - International Astronomical Union. 101:153-158
A high resolution X-ray image from the Einstein Observatory of the young supernova remnant G292.0+1.8 (MSH11–54), previously noted as peculiar in terms of its spectral and morphological properties at optical and radio wavelengths, also shows an unu
Autor:
A. M. Cruise, I. R. Tuohy
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 171:33P-39P