A search for quasi-periodic oscillations in 4U/MXB 1735-44

Details A search for quasi-periodic oscillations in 4U/MXB 1735-44 A search for quasi-periodic oscillations in 4U/MXB 1735-44

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.238..851p&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 238, May 15, 1989, p. 851-861.

Astronomy and Astrophysics

Astronomy

4

Horizontal Branch Stars, Stellar Oscillations, Variable Stars, X Ray Binaries, Companion Stars, Main Sequence Stars, Periodic Variations, Stellar Luminosity, Stellar Mass

Scientific paper

A search for quasi-periodic oscillations (QPOs) in 4U/MXB 1735-44 was performed using Exosat observations during which the source was in a horizontal branch of the spectral hardness-intensity diagram for about 8 hr and in a normal branch type of behavior for about 46 hr. No QPOs or low-frequency noise was found in the horizontal branch state. It is suggested that this absence is due to either low luminosity or the fact that the companion in 1735-44 is a main-sequence star.

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