A Potential Cyclotron Resonant Scattering Feature in the Ultraluminous X-Ray Source Pulsar NGC 300 ULX1 Seen by NuSTAR and XMM-Newton

D. J. Walton; M. Bachetti; F. Fürst; D. Barret; M. Brightman; A. C. Fabian; B. W. Grefenstette; F. A. Harrison; M. Heida; J. Kennea; P. Kosec; R. M. Lau; K. K. Madsen; M. J. Middleton; C. Pinto; J. F. Steiner; N. Webb

doi:10.3847/2041-8213/aabadc

A Potential Cyclotron Resonant Scattering Feature in the Ultraluminous X-Ray Source Pulsar NGC 300 ULX1 Seen by NuSTAR and XMM-Newton

D. J. Walton, M. Bachetti, F. Fürst, D. Barret, M. Brightman, A. C. Fabian, B. W. Grefenstette, F. A. Harrison, M. Heida, J. Kennea, P. Kosec, R. M. Lau, K. K. Madsen, M. J. Middleton, C. Pinto, J. F. Steiner, N. Webb

Astronomy & Astrophysics

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Abstract

Based on phase-resolved broadband spectroscopy using XMM-Newton and NuSTAR, we report on a potential cyclotron resonant scattering feature (CRSF) at E ∼ 13 keV in the pulsed spectrum of the recently discovered ultraluminous X-ray source (ULX) pulsar NGC 300 ULX1. If this interpretation is correct, the implied magnetic field of the central neutron star is B ∼ 10¹² G (assuming scattering by electrons), similar to that estimated from the observed spin-up of the star, and also similar to known Galactic X-ray pulsars. We discuss the implications of this result for the connection between NGC 300 ULX1 and the other known ULX pulsars, particularly in light of the recent discovery of a likely proton cyclotron line in another ULX, M51 ULX-8.

Original language	English (US)
Article number	L3
Journal	Astrophysical Journal Letters
Volume	857
Issue number	1
DOIs	https://doi.org/10.3847/2041-8213/aabadc
State	Published - Apr 10 2018

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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Walton, D. J., Bachetti, M., Fürst, F., Barret, D., Brightman, M., Fabian, A. C., Grefenstette, B. W., Harrison, F. A., Heida, M., Kennea, J., Kosec, P., Lau, R. M., Madsen, K. K., Middleton, M. J., Pinto, C., Steiner, J. F., & Webb, N. (2018). A Potential Cyclotron Resonant Scattering Feature in the Ultraluminous X-Ray Source Pulsar NGC 300 ULX1 Seen by NuSTAR and XMM-Newton. Astrophysical Journal Letters, 857(1), Article L3. https://doi.org/10.3847/2041-8213/aabadc

@article{3bff7d05e5c641148a624f00a1e08f73,

title = "A Potential Cyclotron Resonant Scattering Feature in the Ultraluminous X-Ray Source Pulsar NGC 300 ULX1 Seen by NuSTAR and XMM-Newton",

abstract = "Based on phase-resolved broadband spectroscopy using XMM-Newton and NuSTAR, we report on a potential cyclotron resonant scattering feature (CRSF) at E ∼ 13 keV in the pulsed spectrum of the recently discovered ultraluminous X-ray source (ULX) pulsar NGC 300 ULX1. If this interpretation is correct, the implied magnetic field of the central neutron star is B ∼ 1012 G (assuming scattering by electrons), similar to that estimated from the observed spin-up of the star, and also similar to known Galactic X-ray pulsars. We discuss the implications of this result for the connection between NGC 300 ULX1 and the other known ULX pulsars, particularly in light of the recent discovery of a likely proton cyclotron line in another ULX, M51 ULX-8.",

author = "Walton, \{D. J.\} and M. Bachetti and F. F{\"u}rst and D. Barret and M. Brightman and Fabian, \{A. C.\} and Grefenstette, \{B. W.\} and Harrison, \{F. A.\} and M. Heida and J. Kennea and P. Kosec and Lau, \{R. M.\} and Madsen, \{K. K.\} and Middleton, \{M. J.\} and C. Pinto and Steiner, \{J. F.\} and N. Webb",

year = "2018",

month = apr,

day = "10",

doi = "10.3847/2041-8213/aabadc",

language = "English (US)",

volume = "857",

journal = "Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "American Astronomical Society",

number = "1",

}

Walton, DJ, Bachetti, M, Fürst, F, Barret, D, Brightman, M, Fabian, AC, Grefenstette, BW, Harrison, FA, Heida, M, Kennea, J, Kosec, P, Lau, RM, Madsen, KK, Middleton, MJ, Pinto, C, Steiner, JF & Webb, N 2018, 'A Potential Cyclotron Resonant Scattering Feature in the Ultraluminous X-Ray Source Pulsar NGC 300 ULX1 Seen by NuSTAR and XMM-Newton', Astrophysical Journal Letters, vol. 857, no. 1, L3. https://doi.org/10.3847/2041-8213/aabadc

TY - JOUR

T1 - A Potential Cyclotron Resonant Scattering Feature in the Ultraluminous X-Ray Source Pulsar NGC 300 ULX1 Seen by NuSTAR and XMM-Newton

AU - Walton, D. J.

AU - Bachetti, M.

AU - Fürst, F.

AU - Barret, D.

AU - Brightman, M.

AU - Fabian, A. C.

AU - Grefenstette, B. W.

AU - Harrison, F. A.

AU - Heida, M.

AU - Kennea, J.

AU - Kosec, P.

AU - Lau, R. M.

AU - Madsen, K. K.

AU - Middleton, M. J.

AU - Pinto, C.

AU - Steiner, J. F.

AU - Webb, N.

PY - 2018/4/10

Y1 - 2018/4/10

N2 - Based on phase-resolved broadband spectroscopy using XMM-Newton and NuSTAR, we report on a potential cyclotron resonant scattering feature (CRSF) at E ∼ 13 keV in the pulsed spectrum of the recently discovered ultraluminous X-ray source (ULX) pulsar NGC 300 ULX1. If this interpretation is correct, the implied magnetic field of the central neutron star is B ∼ 1012 G (assuming scattering by electrons), similar to that estimated from the observed spin-up of the star, and also similar to known Galactic X-ray pulsars. We discuss the implications of this result for the connection between NGC 300 ULX1 and the other known ULX pulsars, particularly in light of the recent discovery of a likely proton cyclotron line in another ULX, M51 ULX-8.

AB - Based on phase-resolved broadband spectroscopy using XMM-Newton and NuSTAR, we report on a potential cyclotron resonant scattering feature (CRSF) at E ∼ 13 keV in the pulsed spectrum of the recently discovered ultraluminous X-ray source (ULX) pulsar NGC 300 ULX1. If this interpretation is correct, the implied magnetic field of the central neutron star is B ∼ 1012 G (assuming scattering by electrons), similar to that estimated from the observed spin-up of the star, and also similar to known Galactic X-ray pulsars. We discuss the implications of this result for the connection between NGC 300 ULX1 and the other known ULX pulsars, particularly in light of the recent discovery of a likely proton cyclotron line in another ULX, M51 ULX-8.

UR - https://www.scopus.com/pages/publications/85045836992

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U2 - 10.3847/2041-8213/aabadc

DO - 10.3847/2041-8213/aabadc

M3 - Article

AN - SCOPUS:85045836992

SN - 2041-8205

VL - 857

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 1

M1 - L3

ER -

A Potential Cyclotron Resonant Scattering Feature in the Ultraluminous X-Ray Source Pulsar NGC 300 ULX1 Seen by NuSTAR and XMM-Newton

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