The University of Southampton
University of Southampton Institutional Repository

Anti-glitches in the ultraluminous accreting pulsar NGC 300 ULX-1 observed with NICER

Anti-glitches in the ultraluminous accreting pulsar NGC 300 ULX-1 observed with NICER
Anti-glitches in the ultraluminous accreting pulsar NGC 300 ULX-1 observed with NICER
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 (NICER). Our timing analysis reveals three sudden spin-down events of magnitudes dnu = -23, -30, and -43 uHz (fractional amplitudes dnu/nu = -4.4, -5.5, and -7.7x10^-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.
1538-4357
1-11
Ray, Paul S.
773c1940-2b53-4871-8176-c363521bb83f
Guillot, Sebastien
5d521f37-303f-4a40-9f85-fbb75b960f12
Ho, Wynn C.G.
d78d4c52-8f92-4846-876f-e04a8f803a45
Kerr, Matthew
ab289c1e-9f3f-485f-9a66-b8cd8940a094
Enoto, Teruaki
c5c94b63-52c8-4fd2-bd9e-260a84fff52c
Gendreau, Keith C.
cad26609-b22d-4c1d-ada3-4af51e2cd780
Arzoumanian, Zaven
5befbba6-f6a1-47c8-ae9e-021c5d854a64
Altamirano, Diego
d5ccdb09-0b71-4303-9538-05b467be075b
Bogdanov, Slavko
39f20582-4d71-4b1a-ae2a-b266367341ef
Campion, Robert
1a91e507-a975-4928-95bf-681771908d27
Chakrabarty, Deepto
322198a5-4c3a-4369-99ee-b66befa6a518
Deneva, Julia S.
a1e7f465-fcc9-465f-8f07-b5f61c87ebd2
Jaisawal, Gaurava K.
4d5dcd39-0881-426d-8ad7-f378238405ae
Kozon, Robert
24b634b3-c6c6-4ab2-ba8d-4d88be7dbb43
Malacaria, Christian
309a8f91-28a7-4365-b0a3-633171fc2e51
Strohmayer, Tod E.
e1a6de84-d23d-43de-b33e-2d49c4a5daa7
Wolff, Michael T.
c92b2667-0178-4c0d-b511-3896834328b2
Ray, Paul S.
773c1940-2b53-4871-8176-c363521bb83f
Guillot, Sebastien
5d521f37-303f-4a40-9f85-fbb75b960f12
Ho, Wynn C.G.
d78d4c52-8f92-4846-876f-e04a8f803a45
Kerr, Matthew
ab289c1e-9f3f-485f-9a66-b8cd8940a094
Enoto, Teruaki
c5c94b63-52c8-4fd2-bd9e-260a84fff52c
Gendreau, Keith C.
cad26609-b22d-4c1d-ada3-4af51e2cd780
Arzoumanian, Zaven
5befbba6-f6a1-47c8-ae9e-021c5d854a64
Altamirano, Diego
d5ccdb09-0b71-4303-9538-05b467be075b
Bogdanov, Slavko
39f20582-4d71-4b1a-ae2a-b266367341ef
Campion, Robert
1a91e507-a975-4928-95bf-681771908d27
Chakrabarty, Deepto
322198a5-4c3a-4369-99ee-b66befa6a518
Deneva, Julia S.
a1e7f465-fcc9-465f-8f07-b5f61c87ebd2
Jaisawal, Gaurava K.
4d5dcd39-0881-426d-8ad7-f378238405ae
Kozon, Robert
24b634b3-c6c6-4ab2-ba8d-4d88be7dbb43
Malacaria, Christian
309a8f91-28a7-4365-b0a3-633171fc2e51
Strohmayer, Tod E.
e1a6de84-d23d-43de-b33e-2d49c4a5daa7
Wolff, Michael T.
c92b2667-0178-4c0d-b511-3896834328b2

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. and Wolff, Michael T. (2019) Anti-glitches in the ultraluminous accreting pulsar NGC 300 ULX-1 observed with NICER. The Astrophysical Journal, 879 (2), 1-11, [130]. (doi:10.3847/1538-4357/ab24d8).

Record type: Article

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 (NICER). Our timing analysis reveals three sudden spin-down events of magnitudes dnu = -23, -30, and -43 uHz (fractional amplitudes dnu/nu = -4.4, -5.5, and -7.7x10^-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.

Text
1811.09218 - Accepted Manuscript
Download (555kB)

More information

Accepted/In Press date: 26 May 2019
e-pub ahead of print date: 16 July 2019

Identifiers

Local EPrints ID: 431490
URI: http://eprints.soton.ac.uk/id/eprint/431490
ISSN: 1538-4357
PURE UUID: ff0fd946-6d52-4851-8027-a19b180d8110
ORCID for Wynn C.G. Ho: ORCID iD orcid.org/0000-0002-6089-6836
ORCID for Diego Altamirano: ORCID iD orcid.org/0000-0002-3422-0074

Catalogue record

Date deposited: 05 Jun 2019 16:30
Last modified: 17 Dec 2019 05:01

Export record

Altmetrics

Contributors

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

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×