The High Time Resolution Universe Pulsar Survey – XVII. PSR J1325−6253, a low eccentricity double neutron star system from an ultra-stripped supernova

Sengar, Rahul; Balakrishnan, V.; Stevenson, S. P.; Bailes, M.; Barr, E. D.; Bhat, N. D. R.; Burgay, M.; Bernadich, M. C.; Cameron, Andrew D.; Champion, D. J.; Chen, W.; Flynn, Chris; Jameson, A.; Johnston, S.; Keith, Michael; Krämer, M.; Morello, Vincent; Ng, Cherry; Possenti, A.; Stappers, B. W.; Shannon, R. M.; Straten, W. van; Wongphechauxsorn, J

doi:10.1093/mnras/stac821

Cited by 16 publications

(8 citation statements)

References 82 publications

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“…A quantitative analysis combining all of these effects for the seven DNSs in our sample was undertaken by Pol et al (2019Pol et al ( , 2020. Although additional systems have been detected since these works (e.g., Sengar et al 2022), none will merge within a Hubble time.…”

Section: Double Neutron Star Systemsmentioning

confidence: 99%

Total r-process Yields of Milky Way Neutron Star Mergers

Holmbeck,

Andrews

2024

ApJ

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While it is now known that the mergers of double neutron star binary systems (NSMs) are copious producers of heavy elements, there remains much speculation about whether they are the sole or even principal site of rapid neutron-capture (r-process) nucleosynthesis, one of the primary ways in which heavy elements are produced. The occurrence rates, delay times, and galactic environments of NSMs hold sway over estimating their total contribution to the elemental abundances in the solar system and the Galaxy. Furthermore, the expected elemental yields of NSMs may depend on the merger parameters themselves—such as their stellar masses and radii—which are not currently considered in many galactic chemical evolution models. Using the characteristics of the observed sample of double neutron star (DNS) systems in the Milky Way as a guide, we predict the expected nucleosynthetic yields that a population of DNSs would produce upon merger, and we compare that nucleosynthetic signature to the heavy-element abundance pattern of solar system elements. We find that with our current models, the present DNS population favors the production of lighter r-process elements, while underproducing the heaviest elements relative to the solar system. This inconsistency could imply an additional site for the heaviest elements or a population of DNSs much different from that observed today.

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Section: Double Neutron Star Systemsmentioning

confidence: 99%

Total r-process Yields of Milky Way Neutron Star Mergers

Holmbeck,

Andrews

2024

ApJ

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“…Such searches will be primarily limited to the regions around the Galactic plane, at least initially, thus processing only a fraction of the SMART data (e.g., sky within |b| 5 • ). Such a multi-pass strategy is also motivated by the demonstrated success of HTRUsouth, which has led to the discovery of exotic systems such as PSR J1757-1854 (Cameron et al, 2018) and wide-orbit double neutron-star system (Sengar et al, 2022). In any case, notwithstanding the high computational cost, the high-profile scientific applications of such rare systems make similar full-scale acceleration searches scientifically compelling for the SMART data.…”

Section: Searches For Binary Millisecond Pulsarsmentioning

confidence: 99%

The Southern-sky MWA Rapid Two-metre (SMART) pulsar survey -- I. Survey design and processing pipeline

Bhat¹,

Swainston²,

McSweeney³

et al. 2023

Preprint

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We present an overview of the Southern-sky MWA Rapid Two-metre (SMART) pulsar survey that exploits the Murchison Widefield Array's large field of view and voltage capture system to survey the sky south of 30 • in declination for pulsars and fast transients in the 140-170 MHz band. The survey is enabled by the advent of the Phase II MWA's compact configuration, which offers an enormous efficiency in beam-forming and processing costs, thereby making an all-sky survey of this magnitude tractable with the MWA. Even with the long dwell times employed for the survey (4800 s), data collection can be completed in <100 hours of telescope time, while still retaining the ability to reach a limiting sensitivity of ∼2-3 mJy (at 150 MHz, near zenith), which is effectively 3-5 times deeper than the previous-generation low-frequency southern-sky pulsar survey, completed in the 1990s. Each observation is processed to generate ∼5000-8000 tied-array beams that tessellate the full ∼610 deg 2 field of view (at 155 MHz), which are then processed to search for pulsars. The voltage-capture recording of the survey also allows a multitude of post hoc processing options including the reprocessing of data for higher time resolution and even exploring image-based techniques for pulsar candidate identification. Due to the substantial computational cost in pulsar searches at low frequencies, the survey data processing is undertaken in multiple passes: in the first pass, a shallow survey is performed, where 10 minutes of each observation is processed, reaching about one-third of the full search sensitivity. Here we present the system overview including details of ongoing processing and initial results. Further details including first pulsar discoveries and a census of low-frequency detections are presented in a companion paper. Future plans include deeper searches to reach the full sensitivity and acceleration searches to target binary and millisecond pulsars. Our simulation analysis forecasts ∼300 new pulsars upon the completion of full processing. The SMART survey will also generate a complete digital record of the low-frequency sky, which will serve as a valuable reference for future pulsar searches planned with the low-frequency Square Kilometre Array.

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“…sky within |b| 5 • ). Such a multi-pass strategy is also motivated by the demonstrated success of HTRU-south, which has led to the discovery of exotic systems such as PSR J1757-1854 (Cameron et al 2018) and wide-orbit double neutron-star system (Sengar et al 2022). In any case, notwithstanding the high computational cost, the highprofile scientific applications of such rare systems make similar full-scale acceleration searches scientifically compelling for the SMART data.…”

Section: Searches For Binary and Millisecond Pulsarsmentioning

confidence: 99%

The Southern-sky MWA Rapid Two-metre (SMART) pulsar survey—I. Survey design and processing pipeline

Swainston

McSweeney

Xue

et al. 2023

Publ. Astron. Soc. Aust.

Self Cite

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We present an overview of the Southern-sky MWA Rapid Two-metre (SMART) pulsar survey that exploits the Murchison Widefield Array’s large field of view and voltage capture system to survey the sky south of 30° in declination for pulsars and fast transients in the 140–170 MHz band. The survey is enabled by the advent of the Phase II MWA’s compact configuration, which offers an enormous efficiency in beam-forming and processing costs, thereby making an all-sky survey of this magnitude tractable with the MWA. Even with the long dwell times employed for the survey (4800 s), data collection can be completed in <100 hours of telescope time, while still retaining the ability to reach a limiting sensitivity of ∼2–3 mJy (at 150 MHz, near zenith), which is effectively 3–5 times deeper than the previous-generation low-frequency southern-sky pulsar survey, completed in the 1990s. Each observation is processed to generate ∼5000–8000 tied-array beams that tessellate the full ∼610 deg2 field of view (at 155 MHz), which are then processed to search for pulsars. The voltage-capture recording of the survey also allows a multitude of post hoc processing options including the reprocessing of data for higher time resolution and even exploring image-based techniques for pulsar candidate identification. Due to the substantial computational cost in pulsar searches at low frequencies, the survey data processing is undertaken in multiple passes: in the first pass, a shallow survey is performed, where 10 minutes of each observation is processed, reaching about one-third of the full search sensitivity. Here we present the system overview including details of ongoing processing and initial results. Further details including first pulsar discoveries and a census of low-frequency detections are presented in a companion paper. Future plans include deeper searches to reach the full sensitivity and acceleration searches to target binary and millisecond pulsars. Our simulation analysis forecasts ∼300 new pulsars upon the completion of full processing. The SMART survey will also generate a complete digital record of the low-frequency sky, which will serve as a valuable reference for future pulsar searches planned with the low-frequency Square Kilometre Array.

show abstract

The High Time Resolution Universe Pulsar Survey – XVII. PSR J1325−6253, a low eccentricity double neutron star system from an ultra-stripped supernova

Cited by 16 publications

References 82 publications

Total r-process Yields of Milky Way Neutron Star Mergers

Total r-process Yields of Milky Way Neutron Star Mergers

The Southern-sky MWA Rapid Two-metre (SMART) pulsar survey -- I. Survey design and processing pipeline

The Southern-sky MWA Rapid Two-metre (SMART) pulsar survey—I. Survey design and processing pipeline

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