Optical spectrophotometry of MR Serpentis during a low state

Details Optical spectrophotometry of MR Serpentis during a low state Optical spectrophotometry of MR Serpentis during a low state

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988pasp..100..791s&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 100, July 1988, p. 791-796.

Astronomy and Astrophysics

Astronomy

7

Cataclysmic Variables, Stellar Spectrophotometry, Visual Photometry, Companion Stars, H Lines, Helium, Radial Velocity, Stellar Mass Accretion

Scientific paper

Orbital spectral coverage of MR Ser (PG 1550 + 191) at 2.5 A resolution was obtained during a time when the system was about one magnitude below its normal high-state brightness. The H and He lines were much weaker than at the high state, but their presence signifies that some accretion was still taking place. The line fluxes and radial velocities of the broad and peak components are compared to the values at times of high accretion. THe similarity of the amplitudes and phase offsets of the velocity curves imply very stable line-emission zones in this system. The line fluxes show large orbital variability, with most of the flux originating from the secondary star. The velocity curves are used to establish a better period (0.0788709 day).

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