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Dynamical constraints on the neutron star mass in EXO 0748-676

Abstract:

We present Very Large Telescope (VLT) intermediate resolution spectroscopy of UY Vol, the optical counterpart of the low mass X-ray binary (LMXB) X-ray burster EXO 0748-676. By using Doppler tomography we detect narrow components within the broad He II λ4542, λ4686 and λ5412 emission lines. The phase, velocity and narrowness of these lines are consistent with their arising from the irradiated hemisphere of the donor star, as has been observed in a number of LMXBs. Under this assumption, we pr...

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Authors


Muñoz-Darias, T More by this author
Casares, J More by this author
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Astrophysics
Steeghs, D More by this author
Martínez-Pais, IG More by this author
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Journal:
Monthly Notices of the Royal Astronomical Society: Letters
Volume:
394
Issue:
1
Pages:
L136-L140
Publication date:
2009-03-05
DOI:
EISSN:
1745-3933
ISSN:
1745-3933
URN:
uuid:4a2bebec-3107-4cd8-af26-2c8cab0d2c94
Source identifiers:
361977
Local pid:
pubs:361977

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