Opt/NIR obs. of 1FGLJ1417.7-4407 neutron star bin. Virtual Observatory Resource

Authors
  1. Swihart S.J.
  2. Strader J.
  3. Shishkovsky L.
  4. Chomiuk L.
  5. Bahramian A.,Heinke C.O.
  6. Miller-Jones J.C.A.
  7. Edwards P.G.
  8. Cheung C.C.
  9. Published by
    CDS
Abstract

The Fermi {gamma}-ray source 1FGL J1417.7-4407 (J1417) is a compact X-ray binary with a neutron star primary and a red giant companion in a ~5.4 days orbit. This initial conclusion, based on optical and X-ray data, was confirmed when a 2.66ms radio pulsar was found at the same location (and with the same orbital properties) as the optical/X-ray source. However, these initial studies found conflicting evidence about the accretion state and other properties of the binary. We present new optical, radio, and X-ray observations of J1417 that allow us to better understand this unusual system. We show that one of the main pieces of evidence previously put forward for an accretion disk-the complex morphology of the persistent H{alpha} emission line-can be better explained by the presence of a strong, magnetically driven stellar wind from the secondary and its interaction with the pulsar wind. The radio spectral index derived from VLA/ATCA observations is broadly consistent with that expected from a millisecond pulsar, further disfavoring an accretion disk scenario. X-ray observations show evidence for a double-peaked orbital light curve, similar to that observed in some redback millisecond pulsar binaries and likely due to an intrabinary shock. Refined optical light-curve fitting gives a distance of 3.1+/-0.6kpc, confirmed by a Gaia DR2 parallax measurement. At this distance the X-ray luminosity of J1417 is (1.0_-0.3_^+0.4^)x10^33^erg/s, which is more luminous than all known redback systems in the rotational-powered pulsar state, perhaps due to the wind from the giant companion. The unusual phenomenology of this system and its differing evolutionary path from redback millisecond pulsar binaries points to a new eclipsing pulsar "spider" subclass that is a possible progenitor of normal field millisecond pulsar binaries.

Keywords
  1. x-ray-binary-stars
  2. neutron-stars
  3. pulsars
  4. infrared-photometry
  5. visible-astronomy
  6. Wide-band photometry
  7. gamma-ray-astronomy
Bibliographic source Bibcode
2018ApJ...866...83S
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/866/83
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/866/83
Document Object Identifer DOI
doi:10.26093/cds/vizier.18660083

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History

2019-10-30T09:23:10Z
Resource record created
2019-10-30T08:26:40Z
Updated
2019-10-30T09:23:10Z
Created

Contact

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CDS support team
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