NOAO >   Observing Info >   Approved Programs >   2017B-0223

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Program Information for 2017B-0223


PI: Vallia Antoniou, Harvard-Smithsonian Center for Astrophysics, vantoniou@cfa.harvard.edu
Address: High Energy Astrophysics Division, 60 Garden St., MS 67, Cambridge, MA 02138 United States

CoI: Andreas Zezas, Harvard-Smithsonian Center for Astrophysics
CoI: Jeremy Drake, Harvard-Smithsonian Center for Astrophysics
CoI: Frank Haberl, Max Planck Institut fuer extraterrestrische Physik
CoI: Giorgos Vasilopoulos, Max Planck Institut fuer extraterrestrische Physik
CoI: Sean Points, NOAO

Title: Insights into High-Mass X-ray Binaries: Bridging the metallicity gap

Abstract: We request SOAR/Goodman optical long-slit spectroscopic observations of 45 objects in the LMC identified as candidate high-mass X-ray binaries (HMXBs). With these observations we will confirm the nature of these systems and we will {it double} the census of currently known HMXBs in our nearest star-forming galaxy. These observations will allow us to: {it (a)} obtain the spectral-type distribution of their donor stars and compare it with the Milky Way and the SMC; {it (b)} measure their formation efficiency as a function of age and by comparison with the Milky Way and the SMC also as a function of metallicity; {it (c)} address the importance of the ``propeller effect". Combination of these results with accreting binary population synthesis models will allow us to test our current framework for their evolution.

Program Type: Standard/Galactic

Scheduled Nights:
Run 1 (2017B):  SOAR/Goodman -- 3n on Dec 10 - Dec 12 2017


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NOAO >   Observing Info >   Approved Programs >   2017B-0223

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