Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...278l..23m&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 278, no. 1, p. L23-L25
Astronomy and Astrophysics
Astrophysics
20
B Stars, Companion Stars, Neutron Stars, Orbital Mechanics, Stellar Rotation, X Ray Stars, Emission Spectra, Exosat Satellite, Light Curve, Optical Emission Spectroscopy
Scientific paper
The unidentified X-ray source 4U 0142+614 has an unusually soft spectrum and has shown a periodic modulation at approximately 25 minutes, which could be interpreted as the orbital period of a Low Mass X-ray Binary. Recently a new X-ray source, probably a Be/neutron star system, has been discovered at an angular distance of only 24 arcmin from 4U 0142+614. We consider the possibility that the newly discovered source, RX J0146.9+6121, is responsible for the periodicity previously attributed to 4U 0142+614. If this interpretation is correct, RX J0146.9+6121 would be the most slowly rotating neutron star known. We present also new spectroscopic data on the optical counterpart of RX J0146.9+6121, that strengthen the similarity with other Be/neutron star binaries. The nature of both sources is discussed in the light of the new interpretation.
de Nile F.
Mereghetti Sandro
Stella Luigi
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