Anti-glitches in the Ultraluminous Accreting Pulsar NGC 300 ULX-1 Observed with NICER

Paul S. Ray, Sebastien Guillot, Wynn C. G. Ho, Matthew Kerr, Teruaki Enoto, Keith C. Gendreau, Zaven Arzoumanian, Diego Altamirano, Slavko Bogdanov, Robert Campion, Deepto Chakrabarty, Julia S. Deneva, Gaurava K. Jaisawal, Robert Kozon, Christian Malacaria, Tod E. Strohmayer, Michael T. Wolff

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

We present evidence for three spin-down glitches (or “anti-glitches”) in the ultraluminous accreting X-ray pulsar NGC 300 ULX-1, in timing observations made with the Neutron Star Interior Composition Explorer. Our timing analysis reveals three sudden spin-down events of magnitudes Δν = −23, −30, and −43 μHz (fractional amplitudes Δν/ν = −4.4, −5.5, and −7.7 × 10−4). We determined fully phase-coherent timing solutions through the first two glitches, giving us high confidence in their detection, while the third candidate glitch is somewhat less secure. These are larger in magnitude (and opposite in sign) than any known radio pulsar glitch. This may be caused by the prolonged rapid spin up of the pulsar, causing a sudden transfer of angular momentum between the superfluid and non-superfluid components of the star. We find no evidence for profile or spectral changes at the epochs of the glitches, supporting the conclusion that these are due to the same process as in normal pulsar glitches, but in reverse.
Original languageEnglish
Article number130
JournalAstrophysical Journal
Volume879
Issue number2
Number of pages11
ISSN0004-637X
DOIs
Publication statusPublished - 2019

Cite this

Ray, P. S., Guillot, S., Ho, W. C. G., Kerr, M., Enoto, T., Gendreau, K. C., ... Wolff, M. T. (2019). Anti-glitches in the Ultraluminous Accreting Pulsar NGC 300 ULX-1 Observed with NICER. Astrophysical Journal, 879(2), [130]. https://doi.org/10.3847/1538-4357/ab24d8
Ray, Paul S. ; Guillot, Sebastien ; Ho, Wynn C. G. ; Kerr, Matthew ; Enoto, Teruaki ; Gendreau, Keith C. ; Arzoumanian, Zaven ; Altamirano, Diego ; Bogdanov, Slavko ; Campion, Robert ; Chakrabarty, Deepto ; Deneva, Julia S. ; Jaisawal, Gaurava K. ; Kozon, Robert ; Malacaria, Christian ; Strohmayer, Tod E. ; Wolff, Michael T. / Anti-glitches in the Ultraluminous Accreting Pulsar NGC 300 ULX-1 Observed with NICER. In: Astrophysical Journal. 2019 ; Vol. 879, No. 2.
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title = "Anti-glitches in the Ultraluminous Accreting Pulsar NGC 300 ULX-1 Observed with NICER",
abstract = "We present evidence for three spin-down glitches (or “anti-glitches”) in the ultraluminous accreting X-ray pulsar NGC 300 ULX-1, in timing observations made with the Neutron Star Interior Composition Explorer. Our timing analysis reveals three sudden spin-down events of magnitudes Δν = −23, −30, and −43 μHz (fractional amplitudes Δν/ν = −4.4, −5.5, and −7.7 × 10−4). We determined fully phase-coherent timing solutions through the first two glitches, giving us high confidence in their detection, while the third candidate glitch is somewhat less secure. These are larger in magnitude (and opposite in sign) than any known radio pulsar glitch. This may be caused by the prolonged rapid spin up of the pulsar, causing a sudden transfer of angular momentum between the superfluid and non-superfluid components of the star. We find no evidence for profile or spectral changes at the epochs of the glitches, supporting the conclusion that these are due to the same process as in normal pulsar glitches, but in reverse.",
author = "Ray, {Paul S.} and Sebastien Guillot and Ho, {Wynn C. G.} and Matthew Kerr and Teruaki Enoto and Gendreau, {Keith C.} and Zaven Arzoumanian and Diego Altamirano and Slavko Bogdanov and Robert Campion and Deepto Chakrabarty and Deneva, {Julia S.} and Jaisawal, {Gaurava K.} and Robert Kozon and Christian Malacaria and Strohmayer, {Tod E.} and Wolff, {Michael T.}",
year = "2019",
doi = "10.3847/1538-4357/ab24d8",
language = "English",
volume = "879",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing",
number = "2",

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Ray, PS, Guillot, S, Ho, WCG, Kerr, M, Enoto, T, Gendreau, KC, Arzoumanian, Z, Altamirano, D, Bogdanov, S, Campion, R, Chakrabarty, D, Deneva, JS, Jaisawal, GK, Kozon, R, Malacaria, C, Strohmayer, TE & Wolff, MT 2019, 'Anti-glitches in the Ultraluminous Accreting Pulsar NGC 300 ULX-1 Observed with NICER', Astrophysical Journal, vol. 879, no. 2, 130. https://doi.org/10.3847/1538-4357/ab24d8

Anti-glitches in the Ultraluminous Accreting Pulsar NGC 300 ULX-1 Observed with NICER. / Ray, Paul S.; Guillot, Sebastien; Ho, Wynn C. G.; Kerr, Matthew; Enoto, Teruaki; Gendreau, Keith C.; Arzoumanian, Zaven; Altamirano, Diego; Bogdanov, Slavko; Campion, Robert; Chakrabarty, Deepto; Deneva, Julia S.; Jaisawal, Gaurava K.; Kozon, Robert; Malacaria, Christian; Strohmayer, Tod E.; Wolff, Michael T.

In: Astrophysical Journal, Vol. 879, No. 2, 130, 2019.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Anti-glitches in the Ultraluminous Accreting Pulsar NGC 300 ULX-1 Observed with NICER

AU - Ray, Paul S.

AU - Guillot, Sebastien

AU - Ho, Wynn C. G.

AU - Kerr, Matthew

AU - Enoto, Teruaki

AU - Gendreau, Keith C.

AU - Arzoumanian, Zaven

AU - Altamirano, Diego

AU - Bogdanov, Slavko

AU - Campion, Robert

AU - Chakrabarty, Deepto

AU - Deneva, Julia S.

AU - Jaisawal, Gaurava K.

AU - Kozon, Robert

AU - Malacaria, Christian

AU - Strohmayer, Tod E.

AU - Wolff, Michael T.

PY - 2019

Y1 - 2019

N2 - We present evidence for three spin-down glitches (or “anti-glitches”) in the ultraluminous accreting X-ray pulsar NGC 300 ULX-1, in timing observations made with the Neutron Star Interior Composition Explorer. Our timing analysis reveals three sudden spin-down events of magnitudes Δν = −23, −30, and −43 μHz (fractional amplitudes Δν/ν = −4.4, −5.5, and −7.7 × 10−4). We determined fully phase-coherent timing solutions through the first two glitches, giving us high confidence in their detection, while the third candidate glitch is somewhat less secure. These are larger in magnitude (and opposite in sign) than any known radio pulsar glitch. This may be caused by the prolonged rapid spin up of the pulsar, causing a sudden transfer of angular momentum between the superfluid and non-superfluid components of the star. We find no evidence for profile or spectral changes at the epochs of the glitches, supporting the conclusion that these are due to the same process as in normal pulsar glitches, but in reverse.

AB - We present evidence for three spin-down glitches (or “anti-glitches”) in the ultraluminous accreting X-ray pulsar NGC 300 ULX-1, in timing observations made with the Neutron Star Interior Composition Explorer. Our timing analysis reveals three sudden spin-down events of magnitudes Δν = −23, −30, and −43 μHz (fractional amplitudes Δν/ν = −4.4, −5.5, and −7.7 × 10−4). We determined fully phase-coherent timing solutions through the first two glitches, giving us high confidence in their detection, while the third candidate glitch is somewhat less secure. These are larger in magnitude (and opposite in sign) than any known radio pulsar glitch. This may be caused by the prolonged rapid spin up of the pulsar, causing a sudden transfer of angular momentum between the superfluid and non-superfluid components of the star. We find no evidence for profile or spectral changes at the epochs of the glitches, supporting the conclusion that these are due to the same process as in normal pulsar glitches, but in reverse.

U2 - 10.3847/1538-4357/ab24d8

DO - 10.3847/1538-4357/ab24d8

M3 - Journal article

VL - 879

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 2

M1 - 130

ER -