Journal
ASTROPHYSICAL JOURNAL LETTERS
Volume 819, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.3847/2041-8205/819/2/L29
Keywords
accretion, accretion disks; magnetic fields; stars: neutron; X-rays: binaries; X-rays: bursts
Categories
Funding
- NASA through Einstein Postdoctoral Fellowship - Chandra X-ray Center [PF4-150125]
- NASA [NAS8-03060]
- ASI-INAF [I/037/12/0, I/004/11/0]
- ESA/PRODEX [90057]
- National Aeronautics and Space Administration
Ask authors/readers for more resources
We present NuSTAR and Swift observations of the neutron star Aquila X-1 during the peak of its 2014 July outburst. The spectrum is soft with strong evidence for a broad Fe Ka line. Modeled with a relativistically broadened reflection model, we find that the inner disk is truncated with an inner radius of 15 +/- 3R(G). The disk is likely truncated by either the boundary layer and/or a magnetic field. Associating the truncated inner disk with pressure from a magnetic field gives an upper limit of B < 5 +/- 2 x 10(8) G. Although the radius is truncated far from the stellar surface, material is still reaching the neutron star surface as evidenced by the X-ray burst present in the NuSTAR observation.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available