The Unusual Binary Pulsar PSR J1744-3922

Rene Breton; R P {Breton}; M S E {Roberts}; S M {Ransom}; V M {Kaspi}; P {Bergeron}; M {Durant}; A J {Faulkner}

The Unusual Binary Pulsar PSR J1744-3922

Rene Breton, R P {Breton}, M S E {Roberts}, S M {Ransom}, V M {Kaspi}, P {Bergeron}, M {Durant}, A J {Faulkner}

Research output: Chapter in Book/Conference proceeding › Conference contribution › peer-review

Abstract

We report on the study of PSR J1744-3922, a Galactic field binary pulsar exhibiting an unusual combination of characteristics in comparison with other MSPs: a relatively long spin period (172 ms), a relatively high magnetic field (1.7e10 G), a short orbital period (4.6 h) and a light companion (Mmin = 0.08 Msun). These properties are not explained by any of the standard evolution models. This suggests that PSR J1744-3922 has a peculiar evolution history. A few other Galactic field binary pulsars show similar orbital and spin characteristics and we suggest they formed in a related way. Possible formation mechanisms would be: the pulsar originating as a high-magnetic field pulsar; common envelope accretion from a low-mass star that might evolve in an ultra-compact X-ray binary; the accretion-induced collapse of a massive white dwarf. We note that PSR J1744-3922 resembles the unusual globular cluster pulsar PSR B1718-19 that has also been proposed to have been formed by accretion-induced collapse.

Original language	English
Title of host publication	IAU Joint Discussion
Volume	6
Publication status	Published - Aug 2006

Publication series

Name	IAU Joint Discussion

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title = "The Unusual Binary Pulsar PSR J1744-3922",

abstract = "We report on the study of PSR J1744-3922, a Galactic field binary pulsar exhibiting an unusual combination of characteristics in comparison with other MSPs: a relatively long spin period (172 ms), a relatively high magnetic field (1.7e10 G), a short orbital period (4.6 h) and a light companion (Mmin = 0.08 Msun). These properties are not explained by any of the standard evolution models. This suggests that PSR J1744-3922 has a peculiar evolution history. A few other Galactic field binary pulsars show similar orbital and spin characteristics and we suggest they formed in a related way. Possible formation mechanisms would be: the pulsar originating as a high-magnetic field pulsar; common envelope accretion from a low-mass star that might evolve in an ultra-compact X-ray binary; the accretion-induced collapse of a massive white dwarf. We note that PSR J1744-3922 resembles the unusual globular cluster pulsar PSR B1718-19 that has also been proposed to have been formed by accretion-induced collapse.",

author = "Rene Breton and {Breton}, {R P} and {Roberts}, {M S E} and {Ransom}, {S M} and {Kaspi}, {V M} and P {Bergeron} and M {Durant} and {Faulkner}, {A J}",

year = "2006",

month = aug,

language = "English",

volume = "6",

series = "IAU Joint Discussion",

booktitle = "IAU Joint Discussion",

}

TY - GEN

T1 - The Unusual Binary Pulsar PSR J1744-3922

AU - Breton, Rene

AU - {Breton}, R P

AU - {Roberts}, M S E

AU - {Ransom}, S M

AU - {Kaspi}, V M

AU - {Bergeron}, P

AU - {Durant}, M

AU - {Faulkner}, A J

PY - 2006/8

Y1 - 2006/8

N2 - We report on the study of PSR J1744-3922, a Galactic field binary pulsar exhibiting an unusual combination of characteristics in comparison with other MSPs: a relatively long spin period (172 ms), a relatively high magnetic field (1.7e10 G), a short orbital period (4.6 h) and a light companion (Mmin = 0.08 Msun). These properties are not explained by any of the standard evolution models. This suggests that PSR J1744-3922 has a peculiar evolution history. A few other Galactic field binary pulsars show similar orbital and spin characteristics and we suggest they formed in a related way. Possible formation mechanisms would be: the pulsar originating as a high-magnetic field pulsar; common envelope accretion from a low-mass star that might evolve in an ultra-compact X-ray binary; the accretion-induced collapse of a massive white dwarf. We note that PSR J1744-3922 resembles the unusual globular cluster pulsar PSR B1718-19 that has also been proposed to have been formed by accretion-induced collapse.

AB - We report on the study of PSR J1744-3922, a Galactic field binary pulsar exhibiting an unusual combination of characteristics in comparison with other MSPs: a relatively long spin period (172 ms), a relatively high magnetic field (1.7e10 G), a short orbital period (4.6 h) and a light companion (Mmin = 0.08 Msun). These properties are not explained by any of the standard evolution models. This suggests that PSR J1744-3922 has a peculiar evolution history. A few other Galactic field binary pulsars show similar orbital and spin characteristics and we suggest they formed in a related way. Possible formation mechanisms would be: the pulsar originating as a high-magnetic field pulsar; common envelope accretion from a low-mass star that might evolve in an ultra-compact X-ray binary; the accretion-induced collapse of a massive white dwarf. We note that PSR J1744-3922 resembles the unusual globular cluster pulsar PSR B1718-19 that has also been proposed to have been formed by accretion-induced collapse.

M3 - Conference contribution

VL - 6

T3 - IAU Joint Discussion

BT - IAU Joint Discussion

ER -

The Unusual Binary Pulsar PSR J1744-3922

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