Discovery of 105 Hz coherent pulsations in the ultracompact binary IGR J16597-3704

Tiziana Di Salvo, Rosario Iaria, Altamirano, Riggio, Degenaar, Thomas Maccarone, Bozzo, Bahramian, Sanna, Wijnands, Sivakoff, Heinke, Burderi, Possenti, Papitto, D'Amico, Ferrigno, Burgay

Risultato della ricerca: Article

7 Citazioni (Scopus)

Abstract

We report the discovery of X-ray pulsations at 105.2 Hz (9.5 ms) from the transient X-ray binary IGR J16597-3704 using NuSTAR and Swift. The source was discovered by INTEGRAL in the globular cluster NGC 6256 at a distance of 9.1 kpc. The X-ray pulsations show a clear Doppler modulation that implies an orbital period of â¼46 min and a projected semi-major axis of â¼5 lt-ms, which makes IGR J16597-3704 an ultracompact X-ray binary system. We estimated a minimum companion mass of 6.5 à 10-10Mâ, assuming a neutron star mass of 1.4 Mâ, and an inclination angle of <75° (suggested by the absence of eclipses or dips in its light curve). The broad-band energy spectrum of the source is well described by a disk blackbody component (kT â¼ 1.4 keV) plus a comptonised power-law with photon index â¼2.3 and an electron temperature of â¼30 keV. Radio pulsations from the source were unsuccessfully searched for with the Parkes Observatory.
Lingua originaleEnglish
pagine (da-a)L2-
Numero di pagine5
RivistaASTRONOMY &amp; ASTROPHYSICS
Volume610
Stato di pubblicazionePublished - 2018

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x rays
eclipses
globular clusters
neutron stars
light curve
inclination
dip
observatories
power law
energy spectra
observatory
electron energy
radio
broadband
modulation
orbitals
electron
photons
energy
temperature

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cita questo

Discovery of 105 Hz coherent pulsations in the ultracompact binary IGR J16597-3704. / Di Salvo, Tiziana; Iaria, Rosario; Altamirano; Riggio; Degenaar; Maccarone, Thomas; Bozzo; Bahramian; Sanna; Wijnands; Sivakoff; Heinke; Burderi; Possenti; Papitto; D'Amico; Ferrigno; Burgay.

In: ASTRONOMY &amp; ASTROPHYSICS, Vol. 610, 2018, pag. L2-.

Risultato della ricerca: Article

Di Salvo, T, Iaria, R, Altamirano, Riggio, Degenaar, Maccarone, T, Bozzo, Bahramian, Sanna, Wijnands, Sivakoff, Heinke, Burderi, Possenti, Papitto, D'Amico, Ferrigno & Burgay 2018, 'Discovery of 105 Hz coherent pulsations in the ultracompact binary IGR J16597-3704', ASTRONOMY &amp; ASTROPHYSICS, vol. 610, pagg. L2-.
Di Salvo, Tiziana ; Iaria, Rosario ; Altamirano ; Riggio ; Degenaar ; Maccarone, Thomas ; Bozzo ; Bahramian ; Sanna ; Wijnands ; Sivakoff ; Heinke ; Burderi ; Possenti ; Papitto ; D'Amico ; Ferrigno ; Burgay. / Discovery of 105 Hz coherent pulsations in the ultracompact binary IGR J16597-3704. In: ASTRONOMY &amp; ASTROPHYSICS. 2018 ; Vol. 610. pagg. L2-.
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abstract = "We report the discovery of X-ray pulsations at 105.2 Hz (9.5 ms) from the transient X-ray binary IGR J16597-3704 using NuSTAR and Swift. The source was discovered by INTEGRAL in the globular cluster NGC 6256 at a distance of 9.1 kpc. The X-ray pulsations show a clear Doppler modulation that implies an orbital period of {\^a}¼46 min and a projected semi-major axis of {\^a}¼5 lt-ms, which makes IGR J16597-3704 an ultracompact X-ray binary system. We estimated a minimum companion mass of 6.5 {\~A} 10-10M{\^a}, assuming a neutron star mass of 1.4 M{\^a}, and an inclination angle of <75{\^A}° (suggested by the absence of eclipses or dips in its light curve). The broad-band energy spectrum of the source is well described by a disk blackbody component (kT {\^a}¼ 1.4 keV) plus a comptonised power-law with photon index {\^a}¼2.3 and an electron temperature of {\^a}¼30 keV. Radio pulsations from the source were unsuccessfully searched for with the Parkes Observatory.",
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author = "{Di Salvo}, Tiziana and Rosario Iaria and Altamirano and Riggio and Degenaar and Thomas Maccarone and Bozzo and Bahramian and Sanna and Wijnands and Sivakoff and Heinke and Burderi and Possenti and Papitto and D'Amico and Ferrigno and Burgay",
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TY - JOUR

T1 - Discovery of 105 Hz coherent pulsations in the ultracompact binary IGR J16597-3704

AU - Di Salvo, Tiziana

AU - Iaria, Rosario

AU - Altamirano, null

AU - Riggio, null

AU - Degenaar, null

AU - Maccarone, Thomas

AU - Bozzo, null

AU - Bahramian, null

AU - Sanna, null

AU - Wijnands, null

AU - Sivakoff, null

AU - Heinke, null

AU - Burderi, null

AU - Possenti, null

AU - Papitto, null

AU - D'Amico, null

AU - Ferrigno, null

AU - Burgay, null

PY - 2018

Y1 - 2018

N2 - We report the discovery of X-ray pulsations at 105.2 Hz (9.5 ms) from the transient X-ray binary IGR J16597-3704 using NuSTAR and Swift. The source was discovered by INTEGRAL in the globular cluster NGC 6256 at a distance of 9.1 kpc. The X-ray pulsations show a clear Doppler modulation that implies an orbital period of â¼46 min and a projected semi-major axis of â¼5 lt-ms, which makes IGR J16597-3704 an ultracompact X-ray binary system. We estimated a minimum companion mass of 6.5 à 10-10Mâ, assuming a neutron star mass of 1.4 Mâ, and an inclination angle of <75° (suggested by the absence of eclipses or dips in its light curve). The broad-band energy spectrum of the source is well described by a disk blackbody component (kT â¼ 1.4 keV) plus a comptonised power-law with photon index â¼2.3 and an electron temperature of â¼30 keV. Radio pulsations from the source were unsuccessfully searched for with the Parkes Observatory.

AB - We report the discovery of X-ray pulsations at 105.2 Hz (9.5 ms) from the transient X-ray binary IGR J16597-3704 using NuSTAR and Swift. The source was discovered by INTEGRAL in the globular cluster NGC 6256 at a distance of 9.1 kpc. The X-ray pulsations show a clear Doppler modulation that implies an orbital period of â¼46 min and a projected semi-major axis of â¼5 lt-ms, which makes IGR J16597-3704 an ultracompact X-ray binary system. We estimated a minimum companion mass of 6.5 à 10-10Mâ, assuming a neutron star mass of 1.4 Mâ, and an inclination angle of <75° (suggested by the absence of eclipses or dips in its light curve). The broad-band energy spectrum of the source is well described by a disk blackbody component (kT â¼ 1.4 keV) plus a comptonised power-law with photon index â¼2.3 and an electron temperature of â¼30 keV. Radio pulsations from the source were unsuccessfully searched for with the Parkes Observatory.

KW - Accretion

KW - accretion disks; Binaries: general; Stars: neutron; X-rays: binaries; Astronomy and Astrophysics; Space and Planetary Science

UR - http://hdl.handle.net/10447/282149

UR - http://www.edpsciences.org/journal/index.cfm?edpsname=aa

M3 - Article

VL - 610

SP - L2-

JO - ASTRONOMY &amp; ASTROPHYSICS

JF - ASTRONOMY &amp; ASTROPHYSICS

SN - 0004-6361

ER -