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Article: Timing of Eight Binary Millisecond Pulsars Found with Arecibo in Fermi-LAT Unidentified Sources
Title | Timing of Eight Binary Millisecond Pulsars Found with Arecibo in Fermi-LAT Unidentified Sources |
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Authors | |
Keywords | Pulsars Binary pulsars Millisecond pulsars |
Issue Date | 2021 |
Publisher | American Astronomical Society, co-published with Institute of Physics Publishing, Inc. The Journal's web site is located at http://iopscience.iop.org/0004-637X/ |
Citation | The Astrophysical Journal, 2021, v. 909 n. 1, p. article no. 6 How to Cite? |
Abstract | We present timing solutions for eight binary millisecond pulsars (MSPs) discovered by searching unidentified Fermi-Large Area Telescope (LAT) source positions with the 327 MHz receiver of the Arecibo 305 m radio telescope. Five of the pulsars are 'spiders' with orbital periods shorter than 8.1 hr. Three of these are in 'black widow' systems (with degenerate companions of 0.02–0.03 M⊙), one is in a 'redback' system (with a non-degenerate companion of gsim0.3 M⊙), and one (J1908+2105) is an apparent middle-ground case between the two observational classes. The remaining three pulsars have white dwarf companions and longer orbital periods. With the initially derived radio timing solutions, we detected γ-ray pulsations from all MSPs and extended the timing solutions using photons from the full Fermi mission, thus confirming the identification of these MSPs with the Fermi-LAT sources. The radio emission of the redback is eclipsed during 50% of its orbital period, which is typical for this kind of system. Two of the black widows exhibit radio eclipses lasting for 10%–20% of the orbit, while J1908+2105 eclipses for 40% of the orbit. We investigate an apparent link between gamma-ray emission and a short orbital period among known binary MSPs in the Galactic disk, and conclude that selection effects cannot be ruled out as the cause. Based on this analysis we outline how the likelihood of new MSP discoveries can be improved in ongoing and future pulsar searches. |
Persistent Identifier | http://hdl.handle.net/10722/297687 |
ISSN | 2023 Impact Factor: 4.8 2023 SCImago Journal Rankings: 1.905 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Deneva, JS | - |
dc.contributor.author | Ray, PS | - |
dc.contributor.author | Camilo, F | - |
dc.contributor.author | Freire, PCC | - |
dc.contributor.author | Cromartie, HT | - |
dc.contributor.author | Ransom, SM | - |
dc.contributor.author | Ferrara, E | - |
dc.contributor.author | Kerr, M | - |
dc.contributor.author | Burnett, TH | - |
dc.contributor.author | Saz Parkinson, PM | - |
dc.date.accessioned | 2021-03-23T04:20:17Z | - |
dc.date.available | 2021-03-23T04:20:17Z | - |
dc.date.issued | 2021 | - |
dc.identifier.citation | The Astrophysical Journal, 2021, v. 909 n. 1, p. article no. 6 | - |
dc.identifier.issn | 0004-637X | - |
dc.identifier.uri | http://hdl.handle.net/10722/297687 | - |
dc.description.abstract | We present timing solutions for eight binary millisecond pulsars (MSPs) discovered by searching unidentified Fermi-Large Area Telescope (LAT) source positions with the 327 MHz receiver of the Arecibo 305 m radio telescope. Five of the pulsars are 'spiders' with orbital periods shorter than 8.1 hr. Three of these are in 'black widow' systems (with degenerate companions of 0.02–0.03 M⊙), one is in a 'redback' system (with a non-degenerate companion of gsim0.3 M⊙), and one (J1908+2105) is an apparent middle-ground case between the two observational classes. The remaining three pulsars have white dwarf companions and longer orbital periods. With the initially derived radio timing solutions, we detected γ-ray pulsations from all MSPs and extended the timing solutions using photons from the full Fermi mission, thus confirming the identification of these MSPs with the Fermi-LAT sources. The radio emission of the redback is eclipsed during 50% of its orbital period, which is typical for this kind of system. Two of the black widows exhibit radio eclipses lasting for 10%–20% of the orbit, while J1908+2105 eclipses for 40% of the orbit. We investigate an apparent link between gamma-ray emission and a short orbital period among known binary MSPs in the Galactic disk, and conclude that selection effects cannot be ruled out as the cause. Based on this analysis we outline how the likelihood of new MSP discoveries can be improved in ongoing and future pulsar searches. | - |
dc.language | eng | - |
dc.publisher | American Astronomical Society, co-published with Institute of Physics Publishing, Inc. The Journal's web site is located at http://iopscience.iop.org/0004-637X/ | - |
dc.relation.ispartof | The Astrophysical Journal | - |
dc.rights | The Astrophysical Journal. Copyright © IOP Publishing. | - |
dc.rights | This is an author-created, un-copyedited version of an article published in [insert name of journal]. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at http://dx.doi.org/[insert DOI]. | - |
dc.subject | Pulsars | - |
dc.subject | Binary pulsars | - |
dc.subject | Millisecond pulsars | - |
dc.title | Timing of Eight Binary Millisecond Pulsars Found with Arecibo in Fermi-LAT Unidentified Sources | - |
dc.type | Article | - |
dc.identifier.email | Saz Parkinson, PM: pablosp@hku.hk | - |
dc.identifier.authority | Saz Parkinson, PM=rp01803 | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.3847/1538-4357/abd7a1 | - |
dc.identifier.scopus | eid_2-s2.0-85103170183 | - |
dc.identifier.hkuros | 321878 | - |
dc.identifier.volume | 909 | - |
dc.identifier.issue | 1 | - |
dc.identifier.spage | article no. 6 | - |
dc.identifier.epage | article no. 6 | - |
dc.identifier.isi | WOS:000623972500001 | - |
dc.publisher.place | United States | - |