Arecibo Pulsar Survey Using ALFA. II. The Young, Highly Relativistic Binary Pulsar J1906+0746

Lorimer, D. R.; Stairs, I. H.; Freire, P. C. C.; Cordes, J. M.; Camilo, F.; Faulkner, A. J.; Lyne, A. G.; Nice, D. J.; Ransom, S. M.; Arzoumanian, Zaven; Manchester, R. N.; Champion, D. J.; Leeuwen, J. van; McLaughlin, M. A.; Ramachandran, R.; Hessels, J. W. T.; Vlemmings, Wouter; Deshpande, A. A.; Chatterjee, Shami; Han, J. L.; Gaensler, B. M.; Kasian, L.; Deneva, J. S.; Reid, Beth; Lazio, T. Joseph W.; Kaspi, V. M.; Crawford, F.; Lommen, A. N.; Backer, D. C.; Krämer, M.; Stappers, B. W.; Hobbs, G.; Possenti, A.; D’Amico, N.; Burgay, M.

doi:10.1086/499918

Cited by 112 publications

(79 citation statements)

References 44 publications

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“…The huge instantaneous sensitivity of Arecibo enables short integration times, which has been helpful in detecting relativistic binaries (e.g., PSR J1906+0746; Lorimer et al 2006b) by reducing the deleterious effect of time-varying Doppler shifts of binary pulsars. The PALFA survey has also proven successful at detecting transient astronomical signals.…”

Section: Introductionmentioning

confidence: 99%

Arecibo Pulsar Survey Using Alfa. Iv. Mock Spectrometer Data Analysis, Survey Sensitivity, and the Discovery of 40 Pulsars

Lazarus

Brazier

Hessels

et al. 2015

ApJ

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130

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The on-going Arecibo Pulsar-ALFA (PALFA) survey began in 2004 and is searching for radio pulsars in the Galactic plane at 1.4 GHz. Here we present a comprehensive description of one of its main data reduction pipelines that is based on the PRESTO software and includes new interference-excision algorithms and candidate selection heuristics. This pipeline has been used to discover 40 pulsars, bringing the survey's discovery total to 144 pulsars. Of the new discoveries, eight are millisecond pulsars (MSPs; P 10 < ms) and one is a Fast Radio Burst (FRB). This pipeline has also re-detected 188 previously known pulsars, 60 of them previously discovered by the other PALFA pipelines. We present a novel method for determining the survey sensitivity that accurately takes into account the effects of interference and red noise: we inject synthetic pulsar signals with various parameters into real survey observations and then attempt to recover them with our pipeline. We find that the PALFA survey achieves the sensitivity to MSPs predicted by theoretical models but suffers a degradation for P 100  ms that gradually becomes up to ∼10 times worse for P 4 s > at DM 150 < pc cm −3 . We estimate 33 ± 3% of the slower pulsars are missed, largely due to red noise. A population synthesis analysis using the sensitivity limits we measured suggests the PALFA survey should have found 224 ± 16 un-recycled pulsars in the data set analyzed, in agreement with the 241 actually detected. The reduced sensitivity could have implications on estimates of the number of longperiod pulsars in the Galaxy.

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Section: Introductionmentioning

confidence: 99%

Arecibo Pulsar Survey Using Alfa. Iv. Mock Spectrometer Data Analysis, Survey Sensitivity, and the Discovery of 40 Pulsars

Lazarus

Brazier

Hessels

et al. 2015

ApJ

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130

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“…r7 Champion et al 2004Champion et al , 2005Stairs 2004. r8 Lorimer et al 2006;Kasian 2008;Stairs 2008. be a possible birth site of the DNS. However, the backward calculation of the motion in the Galaxy requires the knowledge of the radial velocity which cannot be measured.…”

Section: Introductionmentioning

confidence: 99%

Constraints on Natal Kicks in Galactic Double Neutron Star Systems

Wong

Willems

Kalogera

2010

ApJ

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Since the discovery of the first double neutron star (DNS) system in 1975 by Hulse and Taylor, there are currently eight confirmed DNS in our galaxy. For every system, the masses of both neutron stars, the orbital semimajor axis, and eccentricity are measured, and proper motion is known for half of the systems. Using the orbital parameters and kinematic information, if available, as constraints for all systems, we investigate the immediate progenitor mass of the second-born neutron star (NS2) and the magnitude of the supernova kick it received at birth, with the primary goal to understand the core-collapse mechanism leading to neutron star formation. Compared to earlier studies, we use a novel method to address the uncertainty related to the unknown radial velocity of the observed systems. For PSR B1534+12 and PSR B1913+16, the kick magnitudes are 150-270 km s −1 and 190-450 km s −1 (with 95% confidence), respectively, and the progenitor masses of the NS2 are 1.3-3.4 M and 1.4-5.0 M (95%), respectively. These suggest that the NS2 was formed by an iron core-collapse supernova in both systems. For PSR J0737−3039, on the other hand, the kick magnitude is only 5-120 km s −1 (95%), and the progenitor mass of the NS2 is 1.3-1.9 M (95%). Because of the relatively low progenitor mass and kick magnitude, the formation of the NS2 in PSR J0737−3039 is potentially connected to an electron capture supernova of a massive O-Ne-Mg white dwarf. For the remaining five Galactic DNS, the kick magnitude ranges from several tens to several hundreds of km s −1 , and the progenitor mass of the NS2 can be as low as ∼1.5 M or as high as ∼8 M . Therefore, in these systems it is not clear which type of supernova is more likely to form the NS2.

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“…Geodetic precession has also been observed in the pulsar-white-dwarf system PSR J1141−6545 (Hotan et al 2005, Manchester et al, in prep. ) and there is good evidence for the effect in the recently discovered PSR J1906+0746 (Lorimer et al 2006, Kasian et al 2008.…”

Section: Geodetic Precessionmentioning

confidence: 93%

Binary pulsars and tests of general relativity

Stairs¹

2009

Proc. IAU

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Abstract. Binary pulsars are a valuable laboratory for gravitational experiments. Doubleneutron-star systems such as the double pulsar provide the most stringent tests of strong-field gravity available to date, while pulsars with white-dwarf companions constrain departures from general relativity based on the difference in gravitational binding energies in the two stars.Future observations may open up entirely new tests of the predictions of general relativity.

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Arecibo Pulsar Survey Using ALFA. II. The Young, Highly Relativistic Binary Pulsar J1906+0746

Cited by 112 publications

References 44 publications

Arecibo Pulsar Survey Using Alfa. Iv. Mock Spectrometer Data Analysis, Survey Sensitivity, and the Discovery of 40 Pulsars

Arecibo Pulsar Survey Using Alfa. Iv. Mock Spectrometer Data Analysis, Survey Sensitivity, and the Discovery of 40 Pulsars

Constraints on Natal Kicks in Galactic Double Neutron Star Systems

Binary pulsars and tests of general relativity

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