The Discovery of the 528.6 Hz Accreting Millisecond X-Ray Pulsar MAXI J1816–195

Peter Bult; Diego Altamirano; Zaven Arzoumanian; Deepto Chakrabarty; Jérôme Chenevez; Elizabeth C. Ferrara; Keith C. Gendreau; Sebastien Guillot; Tolga Güver; Wataru Iwakiri; Gaurava K. Jaisawal; Giulio C. Mancuso; Christian Malacaria; Mason Ng; Andrea Sanna; Tod E. Strohmayer; Zorawar Wadiasingh; Michael T. Wolff

doi:10.3847/2041-8213/ac87f9

The Discovery of the 528.6 Hz Accreting Millisecond X-Ray Pulsar MAXI J1816–195

Peter Bult, Diego Altamirano, Zaven Arzoumanian, Deepto Chakrabarty, Jérôme Chenevez, Elizabeth C. Ferrara, Keith C. Gendreau, Sebastien Guillot, Tolga Güver, Wataru Iwakiri, Gaurava K. Jaisawal, Giulio C. Mancuso, Christian Malacaria, Mason Ng, Andrea Sanna, Tod E. Strohmayer, Zorawar Wadiasingh, Michael T. Wolff

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Abstract

We present the discovery of 528.6 Hz pulsations in the new X-ray transient MAXI J1816–195. Using NICER, we observed the first recorded transient outburst from the neutron star low-mass X-ray binary MAXI J1816–195 over a period of 28 days. From a timing analysis of the 528.6 Hz pulsations, we find that the binary system is well described as a circular orbit with an orbital period of 4.8 hr and a projected semimajor axis of 0.26 lt-s for the pulsar, which constrains the mass of the donor star to 0.10–0.55 M⊙. Additionally, we observed 15 thermonuclear X-ray bursts showing a gradual evolution in morphology over time, and a recurrence time as short as 1.4 hr. We did not detect evidence for photospheric radius expansion, placing an upper limit on the source distance of 8.6 kpc.

Original language	English
Article number	L32
Journal	The Astrophysical Journal. Letters
Volume	935
Issue number	2
Number of pages	6
ISSN	2041-8205
DOIs	https://doi.org/10.3847/2041-8213/ac87f9
Publication status	Published - 2022

Keywords

Low-mass x-ray binary stars
Millisecond pulsars
X-ray bursts

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Bult, P., Altamirano, D., Arzoumanian, Z., Chakrabarty, D., Chenevez, J., Ferrara, E. C., Gendreau, K. C., Guillot, S., Güver, T., Iwakiri, W., Jaisawal, G. K., Mancuso, G. C., Malacaria, C., Ng, M., Sanna, A., Strohmayer, T. E., Wadiasingh, Z., & Wolff, M. T. (2022). The Discovery of the 528.6 Hz Accreting Millisecond X-Ray Pulsar MAXI J1816–195. The Astrophysical Journal. Letters, 935(2), [L32]. https://doi.org/10.3847/2041-8213/ac87f9

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title = "The Discovery of the 528.6 Hz Accreting Millisecond X-Ray Pulsar MAXI J1816–195",

abstract = "We present the discovery of 528.6 Hz pulsations in the new X-ray transient MAXI J1816–195. Using NICER, we observed the first recorded transient outburst from the neutron star low-mass X-ray binary MAXI J1816–195 over a period of 28 days. From a timing analysis of the 528.6 Hz pulsations, we find that the binary system is well described as a circular orbit with an orbital period of 4.8 hr and a projected semimajor axis of 0.26 lt-s for the pulsar, which constrains the mass of the donor star to 0.10–0.55 M⊙. Additionally, we observed 15 thermonuclear X-ray bursts showing a gradual evolution in morphology over time, and a recurrence time as short as 1.4 hr. We did not detect evidence for photospheric radius expansion, placing an upper limit on the source distance of 8.6 kpc.",

keywords = "Low-mass x-ray binary stars, Millisecond pulsars, X-ray bursts",

author = "Peter Bult and Diego Altamirano and Zaven Arzoumanian and Deepto Chakrabarty and J{\'e}r{\^o}me Chenevez and Ferrara, {Elizabeth C.} and Gendreau, {Keith C.} and Sebastien Guillot and Tolga G{\"u}ver and Wataru Iwakiri and Jaisawal, {Gaurava K.} and Mancuso, {Giulio C.} and Christian Malacaria and Mason Ng and Andrea Sanna and Strohmayer, {Tod E.} and Zorawar Wadiasingh and Wolff, {Michael T.}",

year = "2022",

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journal = "The Astrophysical Journal. Letters",

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Bult, P, Altamirano, D, Arzoumanian, Z, Chakrabarty, D, Chenevez, J, Ferrara, EC, Gendreau, KC, Guillot, S, Güver, T, Iwakiri, W, Jaisawal, GK, Mancuso, GC, Malacaria, C, Ng, M, Sanna, A, Strohmayer, TE, Wadiasingh, Z & Wolff, MT 2022, 'The Discovery of the 528.6 Hz Accreting Millisecond X-Ray Pulsar MAXI J1816–195', The Astrophysical Journal. Letters, vol. 935, no. 2, L32. https://doi.org/10.3847/2041-8213/ac87f9

TY - JOUR

T1 - The Discovery of the 528.6 Hz Accreting Millisecond X-Ray Pulsar MAXI J1816–195

AU - Bult, Peter

AU - Altamirano, Diego

AU - Arzoumanian, Zaven

AU - Chakrabarty, Deepto

AU - Chenevez, Jérôme

AU - Ferrara, Elizabeth C.

AU - Gendreau, Keith C.

AU - Guillot, Sebastien

AU - Güver, Tolga

AU - Iwakiri, Wataru

AU - Jaisawal, Gaurava K.

AU - Mancuso, Giulio C.

AU - Malacaria, Christian

AU - Ng, Mason

AU - Sanna, Andrea

AU - Strohmayer, Tod E.

AU - Wadiasingh, Zorawar

AU - Wolff, Michael T.

PY - 2022

Y1 - 2022

N2 - We present the discovery of 528.6 Hz pulsations in the new X-ray transient MAXI J1816–195. Using NICER, we observed the first recorded transient outburst from the neutron star low-mass X-ray binary MAXI J1816–195 over a period of 28 days. From a timing analysis of the 528.6 Hz pulsations, we find that the binary system is well described as a circular orbit with an orbital period of 4.8 hr and a projected semimajor axis of 0.26 lt-s for the pulsar, which constrains the mass of the donor star to 0.10–0.55 M⊙. Additionally, we observed 15 thermonuclear X-ray bursts showing a gradual evolution in morphology over time, and a recurrence time as short as 1.4 hr. We did not detect evidence for photospheric radius expansion, placing an upper limit on the source distance of 8.6 kpc.

AB - We present the discovery of 528.6 Hz pulsations in the new X-ray transient MAXI J1816–195. Using NICER, we observed the first recorded transient outburst from the neutron star low-mass X-ray binary MAXI J1816–195 over a period of 28 days. From a timing analysis of the 528.6 Hz pulsations, we find that the binary system is well described as a circular orbit with an orbital period of 4.8 hr and a projected semimajor axis of 0.26 lt-s for the pulsar, which constrains the mass of the donor star to 0.10–0.55 M⊙. Additionally, we observed 15 thermonuclear X-ray bursts showing a gradual evolution in morphology over time, and a recurrence time as short as 1.4 hr. We did not detect evidence for photospheric radius expansion, placing an upper limit on the source distance of 8.6 kpc.

KW - Low-mass x-ray binary stars

KW - Millisecond pulsars

KW - X-ray bursts

U2 - 10.3847/2041-8213/ac87f9

DO - 10.3847/2041-8213/ac87f9

M3 - Journal article

SN - 2041-8205

VL - 935

JO - The Astrophysical Journal. Letters

JF - The Astrophysical Journal. Letters

IS - 2

M1 - L32

ER -

The Discovery of the 528.6 Hz Accreting Millisecond X-Ray Pulsar MAXI J1816–195

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