The two optical candidates of LMC X-2

Details The two optical candidates of LMC X-2 The two optical candidates of LMC X-2

Jul 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...207..329p&link_type=abstract

Astrophysical Journal, vol. 207, July 1, 1976, pt. 1, p. 329-332.

Other

Eclipsing Binary Stars, Light Curve, Stellar Spectrophotometry, Supergiant Stars, Ubv Spectra, X Ray Sources, Lyra Constellation, Periodic Variations, X Ray Binaries

Scientific paper

Results are presented for UBV photoelectric photometry of the two early-type supergiants HDE 271227 and HDE 271213, which are candidates for the optical counterpart of LMC X-2. It is shown that HDE 271227 is an eclipsing binary of the Beta Lyrae type, that its remarkably smooth optical light curve is different from those of other X-ray binaries, and that it may be eliminated as a candidate. It is concluded that the photometric and spectral characteristics of HDE 271213 make it an excellent candidate for the optical counterpat of LMC X-2, even though the required periodicity of about 23 days cannot be confirmed.

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