Data

Parkes observations for project P1386 semester 2025OCTS_09

Commonwealth Scientific and Industrial Research Organisation
Squillace, Reynier ; Ransom, Scott ; Kaspi, Victoria ; Rosenthal, Alexandra ; Huang, Lyra
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ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=info:doi10.25919/jfb0-a346&rft.title=Parkes observations for project P1386 semester 2025OCTS_09&rft.identifier=https://doi.org/10.25919/jfb0-a346&rft.publisher=Commonwealth Scientific and Industrial Research Organisation&rft.description=J0045-7319 is a B star/pulsar binary in the Small Magellanic Cloud (SMC) with an orbital period of 51 days. The system is highly eccentric, with a closest approach of only 6 B-star radii, and it offers an unusual probe into massive stars in the SMC. Although similar systems exhibit strong dispersion measure (DM) variation during periastron arising from the stellar wind, observations in 1996 on the Parkes 70 cm receiver found no evidence of a wind from the B star. We propose a new set of observations on the Ultra-Wide Low-frequency receiver (UWL) designed to measure the wind. A null result will decrease the known upper limit on the B-star wind's contribution to DM by a factor of 9.&rft.creator=Squillace, Reynier &rft.creator=Ransom, Scott &rft.creator=Kaspi, Victoria &rft.creator=Rosenthal, Alexandra &rft.creator=Huang, Lyra &rft.date=2025&rft.edition=v1&rft_rights=Creative Commons Attribution 4.0 International Licence https://creativecommons.org/licenses/by/4.0/&rft_rights=Data is accessible online and may be reused in accordance with licence conditions&rft_rights=All Rights (including copyright) CSIRO 2025.&rft_subject=pulsars&rft_subject=neutron stars&rft_subject=compact binaries and/or black holes&rft_subject=Astronomical sciences not elsewhere classified&rft_subject=Astronomical sciences&rft_subject=PHYSICAL SCIENCES&rft.type=dataset&rft.language=English Access the data
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Creative Commons Attribution 4.0 International Licence
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Data is accessible online and may be reused in accordance with licence conditions

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J0045-7319 is a B star/pulsar binary in the Small Magellanic Cloud (SMC) with an orbital period of 51 days. The system is highly eccentric, with a closest approach of only 6 B-star radii, and it offers an unusual probe into massive stars in the SMC. Although similar systems exhibit strong dispersion measure (DM) variation during periastron arising from the stellar wind, observations in 1996 on the Parkes 70 cm receiver found no evidence of a wind from the B star. We propose a new set of observations on the Ultra-Wide Low-frequency receiver (UWL) designed to measure the wind. A null result will decrease the known upper limit on the B-star wind's contribution to DM by a factor of 9.

Available: 2025-12-11

Data time period: 2025-10-01 to 2026-03-31

Subjects
Astronomical Sciences | Astronomical Sciences Not Elsewhere Classified | Physical Sciences | compact binaries and/or black holes | neutron stars | pulsars |

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Identifiers
ACN 633 798 857