Optical pulsations from a transitional millisecond pulsar

Tiziana Di Salvo, Gianluca Israel, Riverol, Di Fabrizio, Ambrosino, Cretaro, Ghedina, Burderi, Meddi, Stella, Papitto

Risultato della ricerca: Article

13 Citazioni (Scopus)

Abstract

Millisecond pulsars are neutron stars that attain their very fast rotation during a 108-109-yr-long phase of disk accretion of matter from a low-mass companion star 1,2. They can be detected as accretion-powered millisecond X-ray pulsars if towards the end of this phase their magnetic field is strong enough to channel the in-flowing matter towards their magnetic poles 3. When mass transfer is reduced or ceases altogether, pulsed emission generated by magnetospheric particle acceleration and powered by the star rotation is observed, preferentially in the radio 4 and gamma-ray 5 bands. A few transitional millisecond pulsars that swing between an accretion-powered X-ray pulsar regime and a rotationally powered radio pulsar regime in response to variations of the mass in-flow rate have been recently identified 6,7. Here, we report the detection of optical pulsations from a transitional millisecond pulsar. The pulsations were observed when the pulsar was surrounded by an accretion disk, and originated inside the magnetosphere or within a few hundreds of kilometres from it. Energy arguments rule out reprocessing of accretion-powered X-ray emission and argue against a process related to accretion onto the pulsar polar caps; synchrotron emission of electrons in a rotation-powered pulsar magnetosphere 8 seems more likely.
Lingua originaleEnglish
pagine (da-a)854-858
Numero di pagine5
RivistaDefault journal
Volume1
Stato di pubblicazionePublished - 2017

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics

Cita questo

Di Salvo, T., Israel, G., Riverol, Di Fabrizio, Ambrosino, Cretaro, ... Papitto (2017). Optical pulsations from a transitional millisecond pulsar. Default journal, 1, 854-858.

Optical pulsations from a transitional millisecond pulsar. / Di Salvo, Tiziana; Israel, Gianluca; Riverol; Di Fabrizio; Ambrosino; Cretaro; Ghedina; Burderi; Meddi; Stella; Papitto.

In: Default journal, Vol. 1, 2017, pag. 854-858.

Risultato della ricerca: Article

Di Salvo, T, Israel, G, Riverol, Di Fabrizio, Ambrosino, Cretaro, Ghedina, Burderi, Meddi, Stella & Papitto 2017, 'Optical pulsations from a transitional millisecond pulsar', Default journal, vol. 1, pagg. 854-858.
Di Salvo T, Israel G, Riverol, Di Fabrizio, Ambrosino, Cretaro e altri. Optical pulsations from a transitional millisecond pulsar. Default journal. 2017;1:854-858.
Di Salvo, Tiziana ; Israel, Gianluca ; Riverol ; Di Fabrizio ; Ambrosino ; Cretaro ; Ghedina ; Burderi ; Meddi ; Stella ; Papitto. / Optical pulsations from a transitional millisecond pulsar. In: Default journal. 2017 ; Vol. 1. pagg. 854-858.
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title = "Optical pulsations from a transitional millisecond pulsar",
abstract = "Millisecond pulsars are neutron stars that attain their very fast rotation during a 108-109-yr-long phase of disk accretion of matter from a low-mass companion star 1,2. They can be detected as accretion-powered millisecond X-ray pulsars if towards the end of this phase their magnetic field is strong enough to channel the in-flowing matter towards their magnetic poles 3. When mass transfer is reduced or ceases altogether, pulsed emission generated by magnetospheric particle acceleration and powered by the star rotation is observed, preferentially in the radio 4 and gamma-ray 5 bands. A few transitional millisecond pulsars that swing between an accretion-powered X-ray pulsar regime and a rotationally powered radio pulsar regime in response to variations of the mass in-flow rate have been recently identified 6,7. Here, we report the detection of optical pulsations from a transitional millisecond pulsar. The pulsations were observed when the pulsar was surrounded by an accretion disk, and originated inside the magnetosphere or within a few hundreds of kilometres from it. Energy arguments rule out reprocessing of accretion-powered X-ray emission and argue against a process related to accretion onto the pulsar polar caps; synchrotron emission of electrons in a rotation-powered pulsar magnetosphere 8 seems more likely.",
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T1 - Optical pulsations from a transitional millisecond pulsar

AU - Di Salvo, Tiziana

AU - Israel, Gianluca

AU - Riverol, null

AU - Di Fabrizio, null

AU - Ambrosino, null

AU - Cretaro, null

AU - Ghedina, null

AU - Burderi, null

AU - Meddi, null

AU - Stella, null

AU - Papitto, null

PY - 2017

Y1 - 2017

N2 - Millisecond pulsars are neutron stars that attain their very fast rotation during a 108-109-yr-long phase of disk accretion of matter from a low-mass companion star 1,2. They can be detected as accretion-powered millisecond X-ray pulsars if towards the end of this phase their magnetic field is strong enough to channel the in-flowing matter towards their magnetic poles 3. When mass transfer is reduced or ceases altogether, pulsed emission generated by magnetospheric particle acceleration and powered by the star rotation is observed, preferentially in the radio 4 and gamma-ray 5 bands. A few transitional millisecond pulsars that swing between an accretion-powered X-ray pulsar regime and a rotationally powered radio pulsar regime in response to variations of the mass in-flow rate have been recently identified 6,7. Here, we report the detection of optical pulsations from a transitional millisecond pulsar. The pulsations were observed when the pulsar was surrounded by an accretion disk, and originated inside the magnetosphere or within a few hundreds of kilometres from it. Energy arguments rule out reprocessing of accretion-powered X-ray emission and argue against a process related to accretion onto the pulsar polar caps; synchrotron emission of electrons in a rotation-powered pulsar magnetosphere 8 seems more likely.

AB - Millisecond pulsars are neutron stars that attain their very fast rotation during a 108-109-yr-long phase of disk accretion of matter from a low-mass companion star 1,2. They can be detected as accretion-powered millisecond X-ray pulsars if towards the end of this phase their magnetic field is strong enough to channel the in-flowing matter towards their magnetic poles 3. When mass transfer is reduced or ceases altogether, pulsed emission generated by magnetospheric particle acceleration and powered by the star rotation is observed, preferentially in the radio 4 and gamma-ray 5 bands. A few transitional millisecond pulsars that swing between an accretion-powered X-ray pulsar regime and a rotationally powered radio pulsar regime in response to variations of the mass in-flow rate have been recently identified 6,7. Here, we report the detection of optical pulsations from a transitional millisecond pulsar. The pulsations were observed when the pulsar was surrounded by an accretion disk, and originated inside the magnetosphere or within a few hundreds of kilometres from it. Energy arguments rule out reprocessing of accretion-powered X-ray emission and argue against a process related to accretion onto the pulsar polar caps; synchrotron emission of electrons in a rotation-powered pulsar magnetosphere 8 seems more likely.

UR - http://hdl.handle.net/10447/339045

UR - https://www.nature.com/natastron/

M3 - Article

VL - 1

SP - 854

EP - 858

JO - Default journal

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