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Title: Pulsed Gamma-Rays From the Millisecond Pulsar J0030+0451 with the Fermi Large Area Telescope

Abstract

We report the discovery of gamma-ray pulsations from the nearby isolated millisecond pulsar PSR J0030+0451 with the Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope (formerly GLAST). This discovery makes PSR J0030+0451 the second millisecond pulsar to be detected in gamma-rays after PSR J0218+4232, observed by the EGRET instrument on the Compton Gamma Ray Observatory. The spin-down power {dot E} = 3.5 x 10{sup 33} ergs s{sup -1} is an order of magnitude lower than the empirical lower bound of previously known gamma-ray pulsars. The emission profile is characterized by two narrow peaks, respectively 0.07 {+-} 0.01 and 0.08 {+-} 0.02 wide, separated by 0.44 {+-} 0.02 in phase. The first gamma-ray peak falls 0.15 {+-} 0.01 after the main radio peak. The pulse shape is similar to that of the 'normal' gamma-ray pulsars. An exponentially cut-off power-law fit of the emission spectrum leads to an integral photon flux above 100 MeV of (6.76 {+-} 1.05 {+-} 1.35) x 10{sup -8} cm{sup -2} s{sup -1} with cut-off energy (1.7 {+-} 0.4 {+-} 0.5) GeV. Based on its parallax distance of (300 {+-} 90) pc, we obtain a gamma-ray efficiency L{sub {gamma}}/{dot E} {approx_equal} 15% for the conversion ofmore » spin-down energy rate into gamma-ray radiation, assuming isotropic emission.« less

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; more »; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; « less
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1046403
Report Number(s):
SLAC-PUB-14764
Journal ID: ISSN 0004-637X; ASJOAB; arXiv:0904.4377; TRN: US1203713
DOE Contract Number:
AC02-76SF00515
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 699; Journal Issue: 2
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; EFFICIENCY; PHOTONS; PULSARS; PULSATIONS; SHAPE; TELESCOPES; Astrophysics,ASTRO

Citation Formats

Abdo, Aous A., /Naval Research Lab, Wash., D.C., Ackermann, M., /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept., Atwood, W.B., /UC, Santa Cruz, Axelsson, M. /Stockholm U., OKC /Stockholm U., Baldini, L., /INFN, Pisa, Ballet, J., /DAPNIA, Saclay, Barbiellini, Guido, /INFN, Trieste /Trieste U., Bastieri, Denis, /INFN, Padua /Padua U., Battelino, M., /Stockholm U., OKC /Royal Inst. Tech., Stockholm, Baughman, B.M., /Ohio State U., Bechtol, K., /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept., Bellazzini, R., /INFN, Pisa, Berenji, B., /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept., Bloom, Elliott D., /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept., Bonamente, E., /INFN, Perugia /Perugia U., Borgland, A.W., /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept., Bregeon, J., /INFN, Pisa, Brez, A., /INFN, Pisa, Brigida, M., /Bari U. /INFN, Bari, Bruel, P., /Ecole Polytechnique, Burnett, Thompson H., /Washington U., Seattle /Bari U. /INFN, Bari /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /IASF, Milan /IASF, Milan /DAPNIA, Saclay /INFN, Perugia /Perugia U. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /George Mason U. /Naval Research Lab, Wash., D.C. /NASA, Goddard /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /INFN, Perugia /Perugia U. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /LPCE, Orleans /Montpellier U. /Sonoma State U. /Stockholm U., OKC /Royal Inst. Tech., Stockholm /Stockholm U. /ASDC, Frascati /Naval Research Lab, Wash., D.C. /INFN, Trieste /Bari U. /INFN, Bari /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /UC, Santa Cruz /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /CENBG, Gradignan /CENBG, Gradignan /Montpellier U. /Bari U. /INFN, Bari /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /INFN, Trieste /Hiroshima U., and /more authors... Pulsed Gamma-Rays From the Millisecond Pulsar J0030+0451 with the Fermi Large Area Telescope. United States: N. p., 2011. Web.
Abdo, Aous A., /Naval Research Lab, Wash., D.C., Ackermann, M., /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept., Atwood, W.B., /UC, Santa Cruz, Axelsson, M. /Stockholm U., OKC /Stockholm U., Baldini, L., /INFN, Pisa, Ballet, J., /DAPNIA, Saclay, Barbiellini, Guido, /INFN, Trieste /Trieste U., Bastieri, Denis, /INFN, Padua /Padua U., Battelino, M., /Stockholm U., OKC /Royal Inst. Tech., Stockholm, Baughman, B.M., /Ohio State U., Bechtol, K., /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept., Bellazzini, R., /INFN, Pisa, Berenji, B., /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept., Bloom, Elliott D., /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept., Bonamente, E., /INFN, Perugia /Perugia U., Borgland, A.W., /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept., Bregeon, J., /INFN, Pisa, Brez, A., /INFN, Pisa, Brigida, M., /Bari U. /INFN, Bari, Bruel, P., /Ecole Polytechnique, Burnett, Thompson H., /Washington U., Seattle /Bari U. /INFN, Bari /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /IASF, Milan /IASF, Milan /DAPNIA, Saclay /INFN, Perugia /Perugia U. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /George Mason U. /Naval Research Lab, Wash., D.C. /NASA, Goddard /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /INFN, Perugia /Perugia U. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /LPCE, Orleans /Montpellier U. /Sonoma State U. /Stockholm U., OKC /Royal Inst. Tech., Stockholm /Stockholm U. /ASDC, Frascati /Naval Research Lab, Wash., D.C. /INFN, Trieste /Bari U. /INFN, Bari /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /UC, Santa Cruz /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /CENBG, Gradignan /CENBG, Gradignan /Montpellier U. /Bari U. /INFN, Bari /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /INFN, Trieste /Hiroshima U., & /more authors... Pulsed Gamma-Rays From the Millisecond Pulsar J0030+0451 with the Fermi Large Area Telescope. United States.
Abdo, Aous A., /Naval Research Lab, Wash., D.C., Ackermann, M., /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept., Atwood, W.B., /UC, Santa Cruz, Axelsson, M. /Stockholm U., OKC /Stockholm U., Baldini, L., /INFN, Pisa, Ballet, J., /DAPNIA, Saclay, Barbiellini, Guido, /INFN, Trieste /Trieste U., Bastieri, Denis, /INFN, Padua /Padua U., Battelino, M., /Stockholm U., OKC /Royal Inst. Tech., Stockholm, Baughman, B.M., /Ohio State U., Bechtol, K., /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept., Bellazzini, R., /INFN, Pisa, Berenji, B., /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept., Bloom, Elliott D., /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept., Bonamente, E., /INFN, Perugia /Perugia U., Borgland, A.W., /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept., Bregeon, J., /INFN, Pisa, Brez, A., /INFN, Pisa, Brigida, M., /Bari U. /INFN, Bari, Bruel, P., /Ecole Polytechnique, Burnett, Thompson H., /Washington U., Seattle /Bari U. /INFN, Bari /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /IASF, Milan /IASF, Milan /DAPNIA, Saclay /INFN, Perugia /Perugia U. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /George Mason U. /Naval Research Lab, Wash., D.C. /NASA, Goddard /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /INFN, Perugia /Perugia U. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /LPCE, Orleans /Montpellier U. /Sonoma State U. /Stockholm U., OKC /Royal Inst. Tech., Stockholm /Stockholm U. /ASDC, Frascati /Naval Research Lab, Wash., D.C. /INFN, Trieste /Bari U. /INFN, Bari /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /UC, Santa Cruz /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /CENBG, Gradignan /CENBG, Gradignan /Montpellier U. /Bari U. /INFN, Bari /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /INFN, Trieste /Hiroshima U., and /more authors... 2011. "Pulsed Gamma-Rays From the Millisecond Pulsar J0030+0451 with the Fermi Large Area Telescope". United States. doi:. https://www.osti.gov/servlets/purl/1046403.
@article{osti_1046403,
title = {Pulsed Gamma-Rays From the Millisecond Pulsar J0030+0451 with the Fermi Large Area Telescope},
author = {Abdo, Aous A. and /Naval Research Lab, Wash., D.C. and Ackermann, M. and /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. and Atwood, W.B. and /UC, Santa Cruz and Axelsson, M. /Stockholm U., OKC /Stockholm U. and Baldini, L. and /INFN, Pisa and Ballet, J. and /DAPNIA, Saclay and Barbiellini, Guido and /INFN, Trieste /Trieste U. and Bastieri, Denis and /INFN, Padua /Padua U. and Battelino, M. and /Stockholm U., OKC /Royal Inst. Tech., Stockholm and Baughman, B.M. and /Ohio State U. and Bechtol, K. and /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. and Bellazzini, R. and /INFN, Pisa and Berenji, B. and /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. and Bloom, Elliott D. and /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. and Bonamente, E. and /INFN, Perugia /Perugia U. and Borgland, A.W. and /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. and Bregeon, J. and /INFN, Pisa and Brez, A. and /INFN, Pisa and Brigida, M. and /Bari U. /INFN, Bari and Bruel, P. and /Ecole Polytechnique and Burnett, Thompson H. and /Washington U., Seattle /Bari U. /INFN, Bari /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /IASF, Milan /IASF, Milan /DAPNIA, Saclay /INFN, Perugia /Perugia U. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /George Mason U. /Naval Research Lab, Wash., D.C. /NASA, Goddard /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /INFN, Perugia /Perugia U. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /LPCE, Orleans /Montpellier U. /Sonoma State U. /Stockholm U., OKC /Royal Inst. Tech., Stockholm /Stockholm U. /ASDC, Frascati /Naval Research Lab, Wash., D.C. /INFN, Trieste /Bari U. /INFN, Bari /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /UC, Santa Cruz /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /CENBG, Gradignan /CENBG, Gradignan /Montpellier U. /Bari U. /INFN, Bari /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /INFN, Trieste /Hiroshima U. and /more authors..},
abstractNote = {We report the discovery of gamma-ray pulsations from the nearby isolated millisecond pulsar PSR J0030+0451 with the Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope (formerly GLAST). This discovery makes PSR J0030+0451 the second millisecond pulsar to be detected in gamma-rays after PSR J0218+4232, observed by the EGRET instrument on the Compton Gamma Ray Observatory. The spin-down power {dot E} = 3.5 x 10{sup 33} ergs s{sup -1} is an order of magnitude lower than the empirical lower bound of previously known gamma-ray pulsars. The emission profile is characterized by two narrow peaks, respectively 0.07 {+-} 0.01 and 0.08 {+-} 0.02 wide, separated by 0.44 {+-} 0.02 in phase. The first gamma-ray peak falls 0.15 {+-} 0.01 after the main radio peak. The pulse shape is similar to that of the 'normal' gamma-ray pulsars. An exponentially cut-off power-law fit of the emission spectrum leads to an integral photon flux above 100 MeV of (6.76 {+-} 1.05 {+-} 1.35) x 10{sup -8} cm{sup -2} s{sup -1} with cut-off energy (1.7 {+-} 0.4 {+-} 0.5) GeV. Based on its parallax distance of (300 {+-} 90) pc, we obtain a gamma-ray efficiency L{sub {gamma}}/{dot E} {approx_equal} 15% for the conversion of spin-down energy rate into gamma-ray radiation, assuming isotropic emission.},
doi = {},
journal = {Astrophysical Journal},
number = 2,
volume = 699,
place = {United States},
year = 2011,
month =
}
  • In this paper, we report the discovery of gamma-ray pulsations from the nearby isolated millisecond pulsar (MSP) PSR J0030+0451 with the Large Area Telescope on the Fermi Gamma-ray Space Telescope (formerly GLAST). This discovery makes PSR J0030+0451 the second MSP to be detected in gamma rays after PSR J0218+4232, observed by the EGRET instrument on the Compton Gamma-Ray Observatory. The spin-down power E(dotabove) = 3.5 x 10 33 erg s -1 is an order of magnitude lower than the empirical lower bound of previously known gamma-ray pulsars. The emission profile is characterized by two narrow peaks, 0.07 ± 0.01 andmore » 0.08 ± 0.02 wide, respectively, separated by 0.44 ± 0.02 in phase. The first gamma-ray peak falls 0.15 ± 0.01 after the main radio peak. The pulse shape is similar to that of the "normal" gamma-ray pulsars. An exponentially cutoff power-law fit of the emission spectrum leads to an integral photon flux above 100 MeV of (6.76 ± 1.05 ± 1.35) × 10 –8 cm –2 s –1 with cutoff energy (1.7 ± 0.4 ± 0.5) GeV. Finally, based on its parallax distance of (300 ± 90) pc, we obtain a gamma-ray efficiency L γ/E(dotabove) ≃ 15% for the conversion of spin-down energy rate into gamma-ray radiation, assuming isotropic emission.« less
  • We report the discovery of gamma-ray pulsations from the nearby isolated millisecond pulsar (MSP) PSR J0030+0451 with the Large Area Telescope on the Fermi Gamma-ray Space Telescope (formerly GLAST). This discovery makes PSR J0030+0451 the second MSP to be detected in gamma rays after PSR J0218+4232, observed by the EGRET instrument on the Compton Gamma-Ray Observatory. The spin-down power E-dot=3.5x10{sup 33} erg s{sup -1} is an order of magnitude lower than the empirical lower bound of previously known gamma-ray pulsars. The emission profile is characterized by two narrow peaks, 0.07 {+-} 0.01 and 0.08 {+-} 0.02 wide, respectively, separated bymore » 0.44 {+-} 0.02 in phase. The first gamma-ray peak falls 0.15 {+-} 0.01 after the main radio peak. The pulse shape is similar to that of the 'normal' gamma-ray pulsars. An exponentially cutoff power-law fit of the emission spectrum leads to an integral photon flux above 100 MeV of (6.76 {+-} 1.05 {+-} 1.35) x 10{sup -8} cm{sup -2} s{sup -1} with cutoff energy (1.7 {+-} 0.4 {+-} 0.5) GeV. Based on its parallax distance of (300 {+-} 90) pc, we obtain a gamma-ray efficiency L{sub {gamma}}/E-dot{approx_equal}15 percent for the conversion of spin-down energy rate into gamma-ray radiation, assuming isotropic emission.« less
  • Radio pulsar PSR J1028-5819 was recently discovered in a high-frequency search (at 3.1 GHz) in the error circle of the Energetic Gamma-Ray Experiment Telescope (EGRET) source 3EG J1027-5817. The spin-down power of this young pulsar is great enough to make it very likely the counterpart for the EGRET source. We report here the discovery of {gamma}-ray pulsations from PSR J1028-5819 in early observations by the Large Area Telescope (LAT) on the Fermi Gamma-Ray Space Telescope. The {gamma}-ray light curve shows two sharp peaks having phase separation of 0.460 {+-} 0.004, trailing the very narrow radio pulse by 0.200 {+-} 0.003more » in phase, very similar to that of other known {gamma}-ray pulsars. The measured {gamma}-ray flux gives an efficiency for the pulsar of {approx}10-20% (for outer magnetosphere beam models). No evidence of a surrounding pulsar wind nebula is seen in the current Fermi data but limits on associated emission are weak because the source lies in a crowded region with high background emission. However, the improved angular resolution afforded by the LAT enables the disentanglement of the previous COS-B and EGRET source detections into at least two distinct sources, one of which is now identified as PSR J1028-5819.« less
  • An interesting new high-energy pulsar sub-population is emerging following early discoveries of gamma-ray millisecond pulsars (MSPs) by the Fermi Large Area Telescope (LAT). We present results from three-dimensional emission modeling, including the special relativistic effects of aberration and time-of-flight delays and also rotational sweepback of B-field lines, in the geometric context of polar cap (PC), outer gap (OG), and two-pole caustic (TPC) pulsar models. In contrast to the general belief that these very old, rapidly rotating neutron stars (NSs) should have largely pair-starved magnetospheres due to the absence of significant pair production, we find that most of the light curvesmore » are best fit by TPC and OG models, which indicates the presence of narrow accelerating gaps limited by robust pair production-even in these pulsars with very low spin-down luminosities. The gamma-ray pulse shapes and relative phase lags with respect to the radio pulses point to high-altitude emission being dominant for all geometries. We also find exclusive differentiation of the current gamma-ray MSP population into two MSP sub-classes: light curve shapes and lags across wavebands impose either pair-starved PC (PSPC) or TPC/OG-type geometries. In the first case, the radio pulse has a small lag with respect to the single gamma-ray pulse, while the (first) gamma-ray peak usually trails the radio by a large phase offset in the latter case. Finally, we find that the flux correction factor as a function of magnetic inclination and observer angles is typically of order unity for all models. Our calculation of light curves and flux correction factor for the case of MSPs is therefore complementary to the 'ATLAS paper' of Watters et al. for younger pulsars.« less
  • Millisecond pulsars (MSPs) have been firmly established as a class of gamma-ray emitters via the detection of pulsations above 0.1 GeV from eight MSPs by the Fermi Large Area Telescope (LAT). Using 13 months of LAT data, significant gamma-ray pulsations at the radio period have been detected from the MSP PSR J0034-0534, making it the ninth clear MSP detection by the LAT. The gamma-ray light curve shows two peaks separated by 0.274 +- 0.015 in phase which are very nearly aligned with the radio peaks, a phenomenon seen only in the Crab pulsar until now. The >=0.1 GeV spectrum ofmore » this pulsar is well fit by an exponentially cutoff power law with a cutoff energy of 1.8 +- 0.6 +- 0.1 GeV and a photon index of 1.5 +- 0.2 +- 0.1, first errors are statistical and second are systematic. The near-alignment of the radio and gamma-ray peaks strongly suggests that the radio and gamma-ray emission regions are co-located and both are the result of caustic formation.« less