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Title: RADIO-QUIET AND RADIO-LOUD PULSARS: SIMILAR IN GAMMA-RAYS BUT DIFFERENT IN X-RAYS

Abstract

We present new Chandra and XMM-Newton observations of a sample of eight radio-quiet (RQ) γ-ray pulsars detected by the Fermi Large Area Telescope. For all eight pulsars we identify the X-ray counterpart, based on the X-ray source localization and the best position obtained from γ-ray pulsar timing. For PSR J2030+4415 we found evidence for a ∼10″-long pulsar wind nebula. Our new results consolidate the work from Marelli et al. and confirm that, on average, the γ-ray-to-X-ray flux ratios (F{sub γ}/F{sub X}) of RQ pulsars are higher than for the radio-loud (RL) ones. Furthermore, while the F{sub γ}/F{sub X} distribution features a single peak for the RQ pulsars, the distribution is more dispersed for the RL ones, possibly showing two peaks. We discuss possible implications of these different distributions based on current models for pulsar X-ray emission.

Authors:
; ; ;  [1];  [2];  [3];  [4]
  1. INAF—Istituto di Astrofisica Spaziale e Fisica Cosmica Milano, via E. Bassini 15, I-20133, Milano (Italy)
  2. Santa Cruz Institute for Particle Physics, Department of Physics, University of California at Santa Cruz, Santa Cruz, CA 95064 (United States)
  3. Stanford University HEPL/KIPAC, 452 Lomita Mall, Stanford, CA 94305-4085 (United States)
  4. Space Science Division, Naval Research Laboratory, Washington, DC 20375-5352 (United States)
Publication Date:
OSTI Identifier:
22522529
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 802; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COSMIC X-RAY SOURCES; CURRENTS; GAMMA RADIATION; NEBULAE; PULSARS; STAR MODELS; STARS; TELESCOPES; X RADIATION

Citation Formats

Marelli, M., Mignani, R. P., Luca, A. De, Salvetti, D., Parkinson, P. M. Saz, Hartog, P. R. Den, and Wolff, M. T., E-mail: marelli@iasf-milano.inaf.it. RADIO-QUIET AND RADIO-LOUD PULSARS: SIMILAR IN GAMMA-RAYS BUT DIFFERENT IN X-RAYS. United States: N. p., 2015. Web. doi:10.1088/0004-637X/802/2/78.
Marelli, M., Mignani, R. P., Luca, A. De, Salvetti, D., Parkinson, P. M. Saz, Hartog, P. R. Den, & Wolff, M. T., E-mail: marelli@iasf-milano.inaf.it. RADIO-QUIET AND RADIO-LOUD PULSARS: SIMILAR IN GAMMA-RAYS BUT DIFFERENT IN X-RAYS. United States. doi:10.1088/0004-637X/802/2/78.
Marelli, M., Mignani, R. P., Luca, A. De, Salvetti, D., Parkinson, P. M. Saz, Hartog, P. R. Den, and Wolff, M. T., E-mail: marelli@iasf-milano.inaf.it. Wed . "RADIO-QUIET AND RADIO-LOUD PULSARS: SIMILAR IN GAMMA-RAYS BUT DIFFERENT IN X-RAYS". United States. doi:10.1088/0004-637X/802/2/78.
@article{osti_22522529,
title = {RADIO-QUIET AND RADIO-LOUD PULSARS: SIMILAR IN GAMMA-RAYS BUT DIFFERENT IN X-RAYS},
author = {Marelli, M. and Mignani, R. P. and Luca, A. De and Salvetti, D. and Parkinson, P. M. Saz and Hartog, P. R. Den and Wolff, M. T., E-mail: marelli@iasf-milano.inaf.it},
abstractNote = {We present new Chandra and XMM-Newton observations of a sample of eight radio-quiet (RQ) γ-ray pulsars detected by the Fermi Large Area Telescope. For all eight pulsars we identify the X-ray counterpart, based on the X-ray source localization and the best position obtained from γ-ray pulsar timing. For PSR J2030+4415 we found evidence for a ∼10″-long pulsar wind nebula. Our new results consolidate the work from Marelli et al. and confirm that, on average, the γ-ray-to-X-ray flux ratios (F{sub γ}/F{sub X}) of RQ pulsars are higher than for the radio-loud (RL) ones. Furthermore, while the F{sub γ}/F{sub X} distribution features a single peak for the RQ pulsars, the distribution is more dispersed for the RL ones, possibly showing two peaks. We discuss possible implications of these different distributions based on current models for pulsar X-ray emission.},
doi = {10.1088/0004-637X/802/2/78},
journal = {Astrophysical Journal},
number = 2,
volume = 802,
place = {United States},
year = {Wed Apr 01 00:00:00 EDT 2015},
month = {Wed Apr 01 00:00:00 EDT 2015}
}