Unveiling Low-frequency Eclipses in Spider Millisecond Pulsars Using Wideband GMRT Observations
Eclipses of radio emission have been reported for ∼58 spider millisecond pulsars (MSPs), of which only around 19% have been extensively studied. Such studies at low frequencies are crucial for probing the properties of the eclipse medium. This study investigates eclipses in 10 MSPs in compact orbit...
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IOP Publishing
2025-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/ad93ba |
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| author | Sangita Kumari Bhaswati Bhattacharyya Devojyoti Kansabanik Rahul Sharan Ankita Ghosh Jayanta Roy |
| author_facet | Sangita Kumari Bhaswati Bhattacharyya Devojyoti Kansabanik Rahul Sharan Ankita Ghosh Jayanta Roy |
| author_sort | Sangita Kumari |
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| description | Eclipses of radio emission have been reported for ∼58 spider millisecond pulsars (MSPs), of which only around 19% have been extensively studied. Such studies at low frequencies are crucial for probing the properties of the eclipse medium. This study investigates eclipses in 10 MSPs in compact orbit using wide-bandwidth observations with the Giant Metrewave Radio Telescope. We report the first evidence of eclipsing for PSR J2234+0944 and J2214+3000 in one epoch, while no evidence of eclipsing was observed in the subsequent two epochs, indicating temporal evolution of the eclipse cutoff frequency in these systems. Constraints on the eclipse cutoff frequency were obtained for PSR J1555–2908, J1810+1744, and J2051–0827. Moreover, for the first time, we detected an eclipse at a nonstandard orbital phase (∼0.5) for PSR J1810+1744, with a duration longer than the eclipse observed at superior conjunction. No eclipses were detected for PSR J0751+1807, J1738+0333, and J1807–2459A at 300–500 MHz and 550–750 MHz. We calculated the mass-loss rate of the companion for PSR J1555–2908 and PSR J1810+1744 and found that these rates are insufficient to ablate the companion stars. We cataloged the $\dot{E}/{a}^{2}$ , mass function, Roche lobe filling factor, and inclination angle for compact MSP binaries with low-mass companions and found that higher spin-down flux does not guarantee eclipses. Our analysis, supported by the Kolmogorov–Smirnov statistic, confirms that eclipsing black widow binaries generally exhibit a higher mass function compared to noneclipsing black widow binaries, consistent with previous studies. |
| format | Article |
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| institution | Kabale University |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
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| series | The Astrophysical Journal |
| spelling | doaj-art-2e913d00e8824acd95c84459a62dcd9d2025-01-22T12:47:08ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-01979214310.3847/1538-4357/ad93baUnveiling Low-frequency Eclipses in Spider Millisecond Pulsars Using Wideband GMRT ObservationsSangita Kumari0https://orcid.org/0000-0002-3764-9204Bhaswati Bhattacharyya1https://orcid.org/0000-0002-6287-6900Devojyoti Kansabanik2https://orcid.org/0000-0001-8801-9635Rahul Sharan3https://orcid.org/0009-0001-9428-6235Ankita Ghosh4https://orcid.org/0009-0002-3211-4865Jayanta Roy5https://orcid.org/0000-0002-2892-8025National Centre for Radio Astrophysics, Tata Institute of Fundamental Research, S. P. Pune University Campus , Pune 411007, India ; skumari@ncra.tifr.res.inNational Centre for Radio Astrophysics, Tata Institute of Fundamental Research, S. P. Pune University Campus , Pune 411007, India ; skumari@ncra.tifr.res.inCooperative Programs for the Advancement of Earth System Science, University Corporation for Atmospheric Research , Boulder, CO 80301, USA; NASA Jack Eddy Fellow at the Johns Hopkins University Applied Physics Laboratory , 11001 Johns Hopkins Road, Laurel, MD 20723, USANational Centre for Radio Astrophysics, Tata Institute of Fundamental Research, S. P. Pune University Campus , Pune 411007, India ; skumari@ncra.tifr.res.inNational Centre for Radio Astrophysics, Tata Institute of Fundamental Research, S. P. Pune University Campus , Pune 411007, India ; skumari@ncra.tifr.res.inNational Centre for Radio Astrophysics, Tata Institute of Fundamental Research, S. P. Pune University Campus , Pune 411007, India ; skumari@ncra.tifr.res.inEclipses of radio emission have been reported for ∼58 spider millisecond pulsars (MSPs), of which only around 19% have been extensively studied. Such studies at low frequencies are crucial for probing the properties of the eclipse medium. This study investigates eclipses in 10 MSPs in compact orbit using wide-bandwidth observations with the Giant Metrewave Radio Telescope. We report the first evidence of eclipsing for PSR J2234+0944 and J2214+3000 in one epoch, while no evidence of eclipsing was observed in the subsequent two epochs, indicating temporal evolution of the eclipse cutoff frequency in these systems. Constraints on the eclipse cutoff frequency were obtained for PSR J1555–2908, J1810+1744, and J2051–0827. Moreover, for the first time, we detected an eclipse at a nonstandard orbital phase (∼0.5) for PSR J1810+1744, with a duration longer than the eclipse observed at superior conjunction. No eclipses were detected for PSR J0751+1807, J1738+0333, and J1807–2459A at 300–500 MHz and 550–750 MHz. We calculated the mass-loss rate of the companion for PSR J1555–2908 and PSR J1810+1744 and found that these rates are insufficient to ablate the companion stars. We cataloged the $\dot{E}/{a}^{2}$ , mass function, Roche lobe filling factor, and inclination angle for compact MSP binaries with low-mass companions and found that higher spin-down flux does not guarantee eclipses. Our analysis, supported by the Kolmogorov–Smirnov statistic, confirms that eclipsing black widow binaries generally exhibit a higher mass function compared to noneclipsing black widow binaries, consistent with previous studies.https://doi.org/10.3847/1538-4357/ad93baBinary pulsarsMillisecond pulsars |
| spellingShingle | Sangita Kumari Bhaswati Bhattacharyya Devojyoti Kansabanik Rahul Sharan Ankita Ghosh Jayanta Roy Unveiling Low-frequency Eclipses in Spider Millisecond Pulsars Using Wideband GMRT Observations The Astrophysical Journal Binary pulsars Millisecond pulsars |
| title | Unveiling Low-frequency Eclipses in Spider Millisecond Pulsars Using Wideband GMRT Observations |
| title_full | Unveiling Low-frequency Eclipses in Spider Millisecond Pulsars Using Wideband GMRT Observations |
| title_fullStr | Unveiling Low-frequency Eclipses in Spider Millisecond Pulsars Using Wideband GMRT Observations |
| title_full_unstemmed | Unveiling Low-frequency Eclipses in Spider Millisecond Pulsars Using Wideband GMRT Observations |
| title_short | Unveiling Low-frequency Eclipses in Spider Millisecond Pulsars Using Wideband GMRT Observations |
| title_sort | unveiling low frequency eclipses in spider millisecond pulsars using wideband gmrt observations |
| topic | Binary pulsars Millisecond pulsars |
| url | https://doi.org/10.3847/1538-4357/ad93ba |
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