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Title: Simultaneous X-ray and radio observations of the radio-mode-switching pulsar PSR B1822$$-$$09

Journal Article · · Monthly Notices of the Royal Astronomical Society
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [9];  [3]
  1. SRON Netherlands Institute for Space Research, Utrecht (The Netherlands); Univ. of Amsterdam, Amsterdam (The Netherlands)
  2. SRON Netherlands Institute for Space Research, Utrecht (The Netherlands)
  3. Univ. of Amsterdam, Amsterdam (The Netherlands); ASTRON, the Netherlands Institute for Radio Astronomy, Dwingeloo (The Netherlands)
  4. Pune Univ., Pune (India); Univ. of Vermont, Burlington, VT (United States); Univ. of Zielona Gora, Zielona Gora (Poland)
  5. Univ. of Amsterdam, Amsterdam (The Netherlands); Univ. of Vermont, Burlington, VT (United States)
  6. Univ. of Manchester, Manchester (United Kingdom)
  7. Univ. of Manchester, Manchester (United Kingdom); Univ. of Sussex, Brighton (United Kingdom)
  8. Pune Univ., Pune (India); Univ. of Zielona Gora, Zielona Gora (Poland)
  9. ASTRON, the Netherlands Institute for Radio Astronomy, Dwingeloo (The Netherlands); Univ. of Zielona Gora, Zielona Gora (Poland)
+ Show Author Affiliations

Here, we report on simultaneous X-ray and radio observations of the radio-mode-switching pulsar PSR B1822–09 with ESA's XMM–Newton and the Westerbork Synthesis Radio Telescope, Giant Metrewave Radio Telescope and Lovell radio telescopes. PSR B1822–09 switches between a radio-bright and radio-quiet mode, and we discovered a relationship between the durations of its modes and a known underlying radio-modulation time-scale within the modes. We discovered X-ray (energies 0.2–1.4 keV) pulsations with a broad sinusoidal pulse, slightly lagging the radio main pulse in phase by 0.094 ± 0.017, with an energy-dependent pulsed fraction varying from ~0.15 at 0.3 keV to ~0.6 at 1 keV. No evidence is found for simultaneous X-ray and radio mode switching. The total X-ray spectrum consists of a cool component (T ~0.96 × 106 K, hotspot radius R ~2.0 km) and a hot component (T ~2.2 × 106 K, R ~100 m). The hot component can be ascribed to the pulsed emission and the cool component to the unpulsed emission. The high-energy characteristics of PSR B1822–09 resemble those of middle-aged pulsars such as PSR B0656+14, PSR B1055–52 and Geminga, including an indication for pulsed high-energy gamma-ray emission in Fermi Large Area Telescope data. Explanations for the high pulsed fraction seem to require different temperatures at the two poles of this orthogonal rotator, or magnetic anisotropic beaming effects in its strong magnetic field. In our X-ray skymap, we found a harder source at only 5.1 ± 0.5 arcsec from PSR B1822–09, which might be a pulsar wind nebula.

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
09-68296; 337062; AC02-76SF00515
OSTI ID:
1355731
Journal Information:
Monthly Notices of the Royal Astronomical Society, Vol. 466, Issue 2; ISSN 0035-8711
Publisher:
Royal Astronomical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 30 works
Citation information provided by
Web of Science

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Cited By (18)

A new X-ray look into four old pulsars journal July 2018
Observational diversity of magnetized neutron stars journal September 2019
Discovery of synchronous X-ray and radio moding of PSR B0823+26 journal August 2018
Radio emission features in different modes of PSR J0826+2637 (B0823+26) journal June 2019
Evaluating the evidence of multipolar surface magnetic field in PSR J0108–1431 journal August 2019
Periodic mode changing in PSR J1048−5832 journal December 2019
The period–width relationship for radio pulsars revisited journal February 2019
Mode switching and oscillations in PSR B1828–11 journal March 2019
Periodic Q-mode modulation in PSR J1825−0935 (PSR B1822−09) journal March 2019
Discovery of X-Rays from the Old and Faint Pulsar J1154–6250 journal September 2018
Thermal Emission and Magnetic Beaming in the Radio and X-Ray Mode-switching PSR B0943+10 journal February 2019
5.0 GHz TMRT Observations of 71 Pulsars journal March 2019
Periodic Modulation: Newly Emergent Emission Behavior in Pulsars journal January 2020
Discovery of X-rays from the old and faint pulsar J1154--6250 text January 2018
The Period-Width relationship for radio pulsars revisited text January 2019
Mode switching and oscillations in PSR B1828-11 text January 2019
Periodic Q-mode modulation in PSR J1825$-$0935 (PSR B1822$-$09) text January 2019
Radio emission features in different modes of PSR J0826+2637 (B0823+26) text January 2019

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Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
stars: neutron
pulsars: general
radio continuum: stars
X-rays: individual: PSR B1822−09