HeI & HeII radial velocities of Sk 160/SMC X-1

DOI

We present new optical spectroscopy of the eclipsing binary pulsar Sk 160/SMC X-1. From the He I absorption lines, taking heating corrections into account, we determine the radial velocity semi-amplitude of Sk 160 to be 21/8+/-1.8km/s. Assuming Sk 160 fills its Roche-lobe, the inclination angle of the system is i=65.3+/-1.3{deg} and in this case we obtain upper limits for the mass of the neutron star as Mx=1.21+/-0.10M_{sun} and for Sk 160 as Mo=16.6+/-0.4M{sun}.

Identifier
DOI http://doi.org/10.26093/cds/vizier.34410685
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/A+A/441/685
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/441/685
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/441/685
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/A+A/441/685
Provenance
Creator Val Baker A.; Norton A.J.; Quaintrell H.
Publisher CDS
Publication Year 2005
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Exoplanet Astronomy; Interdisciplinary Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy