Discoveries and timing of pulsars in M62

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review

Autorschaft

  • L. Vleeschower
  • A. Corongiu
  • B. W. Stappers
  • P. C.C. Freire
  • A. Ridolfi
  • F. Abbate
  • S. M. Ransom
  • A. Possenti
  • P. V. Padmanabh
  • V. Balakrishnan
  • M. Kramer
  • V. Venkatraman Krishnan
  • L. Zhang
  • M. Bailes
  • E. D. Barr
  • S. Buchner
  • W. Chen

Organisationseinheiten

Externe Organisationen

  • University of Manchester
  • University of Wisconsin Milwaukee
  • Max-Planck-Institut für Radioastronomie (MPIfR)
  • National Radio Astronomy Observatory Socorro
  • Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut)
  • CAS - National Astronomical Observatories
  • Swinburne University of Technology
  • South African Radio Astronomy Observatory (SARAO)
  • Osservatorio Astronomico di Cagliari (OAC)
Forschungs-netzwerk anzeigen

Details

OriginalspracheEnglisch
Seiten (von - bis)1436-1456
Seitenumfang21
FachzeitschriftMonthly Notices of the Royal Astronomical Society
Jahrgang530
Ausgabenummer2
Frühes Online-Datum20 März 2024
PublikationsstatusVeröffentlicht - Mai 2024

Abstract

Using MeerKAT, we have discovered three new millisecond pulsars (MSPs) in the bulge globular cluster M62: M62H, M62I, and M62J. All three are in binary systems, which means all ten known pulsars in the cluster are in binaries. M62H has a planetary-mass companion with a median mass Mc, med ∼3 MJ and a mean density of ρ ∼11 g cm-3. M62I has an orbital period of 0.51 d and a Mc, med ∼0.15 M⊙. Neither of these low-mass systems exhibit eclipses. M62J has only been detected in the two Ultra High Frequency band (816 MHz) observations with a flux density S816 = 0.08 mJy. The non-detection in the L-band (1284 MHz) indicates it has a relatively steep spectrum (β < -3.1). We also present 23-yr-long timing solutions obtained using data from the Parkes 'Murriyang', Effelsberg, and MeerKAT telescopes for the six previously known pulsars. For all these pulsars, we measured the second spin-period derivatives and the rate of change of orbital period caused by the gravitational field of the cluster, and their proper motions. From these measurements, we conclude that the pulsars' maximum accelerations are consistent with the maximum cluster acceleration assuming a core-collapsed mass distribution. Studies of the eclipses of the redback M62B and the black widow M62E at four and two different frequency bands, respectively, reveal a frequency dependence with longer and asymmetric eclipses at lower frequencies. The presence of only binary MSPs in this cluster challenges models which suggest that the MSP population of core-collapsed clusters should be dominated by isolated MSPs.

ASJC Scopus Sachgebiete

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Discoveries and timing of pulsars in M62. / Vleeschower, L.; Corongiu, A.; Stappers, B. W. et al.
in: Monthly Notices of the Royal Astronomical Society, Jahrgang 530, Nr. 2, 05.2024, S. 1436-1456.

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review

Vleeschower, L, Corongiu, A, Stappers, BW, Freire, PCC, Ridolfi, A, Abbate, F, Ransom, SM, Possenti, A, Padmanabh, PV, Balakrishnan, V, Kramer, M, Venkatraman Krishnan, V, Zhang, L, Bailes, M, Barr, ED, Buchner, S & Chen, W 2024, 'Discoveries and timing of pulsars in M62', Monthly Notices of the Royal Astronomical Society, Jg. 530, Nr. 2, S. 1436-1456. https://doi.org/10.1093/mnras/stae816, https://doi.org/10.48550/arXiv.2403.12137
Vleeschower, L., Corongiu, A., Stappers, B. W., Freire, P. C. C., Ridolfi, A., Abbate, F., Ransom, S. M., Possenti, A., Padmanabh, P. V., Balakrishnan, V., Kramer, M., Venkatraman Krishnan, V., Zhang, L., Bailes, M., Barr, E. D., Buchner, S., & Chen, W. (2024). Discoveries and timing of pulsars in M62. Monthly Notices of the Royal Astronomical Society, 530(2), 1436-1456. https://doi.org/10.1093/mnras/stae816, https://doi.org/10.48550/arXiv.2403.12137
Vleeschower L, Corongiu A, Stappers BW, Freire PCC, Ridolfi A, Abbate F et al. Discoveries and timing of pulsars in M62. Monthly Notices of the Royal Astronomical Society. 2024 Mai;530(2):1436-1456. Epub 2024 Mär 20. doi: 10.1093/mnras/stae816, 10.48550/arXiv.2403.12137
Vleeschower, L. ; Corongiu, A. ; Stappers, B. W. et al. / Discoveries and timing of pulsars in M62. in: Monthly Notices of the Royal Astronomical Society. 2024 ; Jahrgang 530, Nr. 2. S. 1436-1456.
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title = "Discoveries and timing of pulsars in M62",
abstract = "Using MeerKAT, we have discovered three new millisecond pulsars (MSPs) in the bulge globular cluster M62: M62H, M62I, and M62J. All three are in binary systems, which means all ten known pulsars in the cluster are in binaries. M62H has a planetary-mass companion with a median mass Mc, med ∼3 MJ and a mean density of ρ ∼11 g cm-3. M62I has an orbital period of 0.51 d and a Mc, med ∼0.15 M⊙. Neither of these low-mass systems exhibit eclipses. M62J has only been detected in the two Ultra High Frequency band (816 MHz) observations with a flux density S816 = 0.08 mJy. The non-detection in the L-band (1284 MHz) indicates it has a relatively steep spectrum (β < -3.1). We also present 23-yr-long timing solutions obtained using data from the Parkes 'Murriyang', Effelsberg, and MeerKAT telescopes for the six previously known pulsars. For all these pulsars, we measured the second spin-period derivatives and the rate of change of orbital period caused by the gravitational field of the cluster, and their proper motions. From these measurements, we conclude that the pulsars' maximum accelerations are consistent with the maximum cluster acceleration assuming a core-collapsed mass distribution. Studies of the eclipses of the redback M62B and the black widow M62E at four and two different frequency bands, respectively, reveal a frequency dependence with longer and asymmetric eclipses at lower frequencies. The presence of only binary MSPs in this cluster challenges models which suggest that the MSP population of core-collapsed clusters should be dominated by isolated MSPs.",
keywords = "binaries: general, globular clusters: individual: M62, pulsars: general, stars: neutron",
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TY - JOUR

T1 - Discoveries and timing of pulsars in M62

AU - Vleeschower, L.

AU - Corongiu, A.

AU - Stappers, B. W.

AU - Freire, P. C.C.

AU - Ridolfi, A.

AU - Abbate, F.

AU - Ransom, S. M.

AU - Possenti, A.

AU - Padmanabh, P. V.

AU - Balakrishnan, V.

AU - Kramer, M.

AU - Venkatraman Krishnan, V.

AU - Zhang, L.

AU - Bailes, M.

AU - Barr, E. D.

AU - Buchner, S.

AU - Chen, W.

N1 - Publisher Copyright: © 2024 The Author(s).

PY - 2024/5

Y1 - 2024/5

N2 - Using MeerKAT, we have discovered three new millisecond pulsars (MSPs) in the bulge globular cluster M62: M62H, M62I, and M62J. All three are in binary systems, which means all ten known pulsars in the cluster are in binaries. M62H has a planetary-mass companion with a median mass Mc, med ∼3 MJ and a mean density of ρ ∼11 g cm-3. M62I has an orbital period of 0.51 d and a Mc, med ∼0.15 M⊙. Neither of these low-mass systems exhibit eclipses. M62J has only been detected in the two Ultra High Frequency band (816 MHz) observations with a flux density S816 = 0.08 mJy. The non-detection in the L-band (1284 MHz) indicates it has a relatively steep spectrum (β < -3.1). We also present 23-yr-long timing solutions obtained using data from the Parkes 'Murriyang', Effelsberg, and MeerKAT telescopes for the six previously known pulsars. For all these pulsars, we measured the second spin-period derivatives and the rate of change of orbital period caused by the gravitational field of the cluster, and their proper motions. From these measurements, we conclude that the pulsars' maximum accelerations are consistent with the maximum cluster acceleration assuming a core-collapsed mass distribution. Studies of the eclipses of the redback M62B and the black widow M62E at four and two different frequency bands, respectively, reveal a frequency dependence with longer and asymmetric eclipses at lower frequencies. The presence of only binary MSPs in this cluster challenges models which suggest that the MSP population of core-collapsed clusters should be dominated by isolated MSPs.

AB - Using MeerKAT, we have discovered three new millisecond pulsars (MSPs) in the bulge globular cluster M62: M62H, M62I, and M62J. All three are in binary systems, which means all ten known pulsars in the cluster are in binaries. M62H has a planetary-mass companion with a median mass Mc, med ∼3 MJ and a mean density of ρ ∼11 g cm-3. M62I has an orbital period of 0.51 d and a Mc, med ∼0.15 M⊙. Neither of these low-mass systems exhibit eclipses. M62J has only been detected in the two Ultra High Frequency band (816 MHz) observations with a flux density S816 = 0.08 mJy. The non-detection in the L-band (1284 MHz) indicates it has a relatively steep spectrum (β < -3.1). We also present 23-yr-long timing solutions obtained using data from the Parkes 'Murriyang', Effelsberg, and MeerKAT telescopes for the six previously known pulsars. For all these pulsars, we measured the second spin-period derivatives and the rate of change of orbital period caused by the gravitational field of the cluster, and their proper motions. From these measurements, we conclude that the pulsars' maximum accelerations are consistent with the maximum cluster acceleration assuming a core-collapsed mass distribution. Studies of the eclipses of the redback M62B and the black widow M62E at four and two different frequency bands, respectively, reveal a frequency dependence with longer and asymmetric eclipses at lower frequencies. The presence of only binary MSPs in this cluster challenges models which suggest that the MSP population of core-collapsed clusters should be dominated by isolated MSPs.

KW - binaries: general

KW - globular clusters: individual: M62

KW - pulsars: general

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