Using<i>Chandra</i>to Unveil the High‐Energy Properties of the High Magnetic Field Radio Pulsar J1119−6127
Bibliographic record
Abstract
PSR J1119–6127 is a high magnetic field ( B = 4.1 × 10 13 G), young (≤1700 year old), and slow ( P = 408 ms) radio pulsar associated with the supernova remnant (SNR) G292.2–0.5. In 2003, Chandra allowed the detection of the X-ray counterpart of the radio pulsar and provided the first evidence for a compact and faint pulsar wind nebula (PWN). We here present new Chandra observations that allowed for the first time an imaging and spectroscopic study of the pulsar and PWN independently of each other. The PWN is only evident in the hard band (above ~2 keV) and consists of jetlike structures extending at least 7 '' from the pulsar, with the southern "jet" being longer than the northern "jet." The spectrum of the PWN is described by a power law with a photon index Γ ∼ 1.1 for the compact PWN and ~1.4 for the southern long jet (at a column density N H = 1.8 × 10 22 cm −2 ), and a total luminosity L X (0.5–7.0 keV) ∼ 4 × 10 32 ergs s −1 , at a distance of 8.4 kpc. We rule out a single blackbody model for the pulsar and present the first evidence of nonthermal emission that dominates above ~3 keV. A two-component model consisting of a power-law component (with photon index Γ ∼ 1.5–2.0) plus a thermal component provides the best fit. The thermal component can be fit by either a blackbody model with a temperature kT ∼ 0.21 keV, or a neutron star atmospheric model with a temperature kT ∼ 0.14 keV. The efficiency of the pulsar in converting its rotational power, , into nonthermal X-ray emission from the pulsar and PWN is ≈5 × 10 −4 , comparable to other rotation-powered pulsars with a similar . We discuss our results in the context of the X-ray manifestation of high magnetic field radio pulsars in comparison with rotation-powered pulsars and magnetars.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.002 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".