NOAO >   Observing Info >   Approved Programs >   2014A-0439

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Proposal Information for 2014A-0439


PI: Jeroen Homan, Massachusetts Institute of Technology, Kavli Institute for Astrophysics and Space Research, US, jeroen@space.mit.edu
Address: Division of Astrophysics, Department of Physics, Cambridge, MA, 02139, USA

CoI: Maureen van den Berg, University of Amsterdam

Title: Near-infrared spectroscopy of the brightest neutron-star X-ray binaries

Abstract: The bright persistent neutron-star X-ray binaries (NSXBs) show a wide variety of phenomena in X-rays that are thought to be driven by near-Eddington mass accretion rates. We have recently started a program of near-infrared photometric and spectroscopic observations of these sources with the aim to understand a broad range of properties of these systems; disk line emission, donor spectral type, and the relation between jet outflows and disk winds. Here we request Flamingos-2 spectra of two sources from different NSXB subclasses, GX 3+1 and GX 340+0, which are thought to accrete at stubstantially different rates. Our main goal is to acquire more information on how the above properties are related to each other and to mass accretion rate. We request a total of 5.1 hr.


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NOAO >   Observing Info >   Approved Programs >   2014A-0439

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