1E 1048. 5 + 5421 - a new 114 minute AM Herculis binary

Journal Article · Sun Mar 01 04:00:00 EST 1987 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/165094· OSTI ID:6067261

Morris, S L; Schmidt, G D; Liebert, J; Gioia, I M; Maccacaro, T

The discovery of a new AM Herculis binary system, found as a serendipitous Einstein X-ray source, is described. Like the previously discovered mass-transfer binaries involving synchronously rotating magnetic white-dwarf primaries, the system exhibits strong circular polarization, X-ray and optical continuum variations, and optical emission lines, all of which seem to be modulated with these binary periods of 114.5 + or - 0.2 minutes. Although all data are not concurrent, the new system appears to possess the highest ratio of F(x)/F(opt) yet found for an AM Her system. The surprising accumulation of AM Her variables with periods near 114 minute is commented on. 32 references.

• Research Organization: Steward Observatory, Tucson, AZ; Colorado Univ., Boulder; Harvard-Smithsonian Center for Astrophysics, Cambridge, MA
• OSTI ID: 6067261
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 314; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BINARY STARS
COSMIC RAY SOURCES
COSMIC X-RAY SOURCES
DWARF STARS
ELECTROMAGNETIC RADIATION
EMISSION SPECTRA
IONIZING RADIATIONS
PHOTOMETRY
POLARIMETRY
POLARIZATION
RADIATIONS
SPECTRA
STARS
VARIATIONS
WHITE DWARF STARS
X RADIATION