Discovery of a Gamma-ray Black Widow Pulsar by GPU-accelerated Einstein@Home

Nieder, L.; Clark, C. J.; Kandel, D.; Romani, R. W.; Bassa, C. G.; Allen, B.; Ashok, A.; Cognard, I.; Fehrmann, H.; Freire, P.; Karuppusamy, R.; Kramer, M.; Li, D.; Machenschalk, B.; Pan, Z.; Papa, M. A.; Ransom, S. M.; Ray, P. S.; Roy, J.; Wang, P.; Wu, J.; Aulbert, C.; Barr, E. D.; Beheshtipour, B.; Behnke, O.; Bhattacharyya, B.; Breton, R. P.; Camilo, F.; Choquet, C.; Dhillon, V. S.; Ferrara, E. C.; Guillemot, L.; Hessels, J. W. T.; Kerr, M.; Kwang, S. A.; Marsh, T. R.; Mickaliger, M. B.; Pleunis, Z.; Pletsch, H.; Roberts, M. S. E.; Sanpa-arsa, S.; Steltner, B.

doi:10.3847/2041-8213/abbc02

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Discovery of a Gamma-ray Black Widow Pulsar by GPU-accelerated Einstein@Home

MPG-Autoren

/persons/resource/persons231210

Nieder, L.
Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons40518

Allen, B.
Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons246440

Ashok, A.
Searching for Continuous Gravitational Waves, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons40523

Fehrmann, H.
Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons40529

Machenschalk, B.
Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons20662

Papa, M. A.
Searching for Continuous Gravitational Waves, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons40519

Aulbert, C.
Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons243907

Beheshtipour, B.
Searching for Continuous Gravitational Waves, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons231204

Behnke, O.
Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons40533

Pletsch, H.
Pulsar Observation and Data Analysis, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons224715

Steltner, B.
Searching for Continuous Gravitational Waves, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Zitation

Nieder, L., Clark, C. J., Kandel, D., Romani, R. W., Bassa, C. G., Allen, B., et al. (2020). Discovery of a Gamma-ray Black Widow Pulsar by GPU-accelerated Einstein@Home. The Astrophysical Journal Letters, 902: L46. doi:10.3847/2041-8213/abbc02.

Zitierlink: https://hdl.handle.net/21.11116/0000-0007-0F95-1

Zusammenfassung

We report the discovery of 1.97ms-period gamma-ray pulsations from the
75-minute orbital-period binary pulsar now named PSR J1653-0158. The associated
Fermi-Large Area Telescope gamma-ray source 4FGL J1653.6-0158 has long been
expected to harbor a binary millisecond pulsar. Despite the pulsar-like
gamma-ray spectrum and candidate optical/X-ray associations -- whose periodic
brightness modulations suggested an orbit -- no radio pulsations had been found
in many searches. The pulsar was discovered by directly searching the gamma-ray
data using the GPU-accelerated Einstein@Home distributed volunteer computing
system. The multi-dimensional parameter space was bounded by positional and
orbital constraints obtained from the optical counterpart. More sensitive
analyses of archival and new radio data using knowledge of the pulsar timing
solution yield very stringent upper limits on radio emission. Any radio
emission is thus either exceptionally weak, or eclipsed for a large fraction of
the time. The pulsar has one of the three lowest inferred surface
magnetic-field strengths of any known pulsar with $B_{\rm surf} \approx 4
\times 10^{7}\,$G. The resulting mass function, combined with models of the
companion star's optical light curve and spectra, suggest a pulsar mass
$\gtrsim 2\,M_{\odot}$. The companion is light-weight with mass $\sim
0.01\,M_{\odot}$, and the orbital period is the shortest known for any
rotation-powered binary pulsar. This discovery demonstrates the Fermi-Large
Area Telescope's potential to discover extreme pulsars that would otherwise
remain undetected.