Gamma-rays from the binary system containing PSR J2032+4127 during its periastron passage

Bednarek, W.; Banasiński, Piotr; Sitarek, J.

doi:10.1088/1361-6471/aa97ee

Cited by 8 publications

(7 citation statements)

References 63 publications

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“…Alternatively, as discussed in Petropoulou et al (2018), it may be caused by geometrical effects associated with the orientation of the stellar disk with respect to the pulsar's orbit. Bednarek et al (2018) also calculated gamma-ray emission from the system, including a detailed treatment of the pair cascades triggered by the absorption of primary gamma-rays, and the subsequent production of inverse Compton emission. They do not calculate a detailed light curve, but conclude that the binary emission may dominate the overall VHE flux, becoming comparable to, or exceeding, the steady flux from TeV J2032+4130 for a few weeks around periastron and superior conjunction.…”

Section: Periodmentioning

confidence: 99%

Periastron Observations of TeV Gamma-Ray Emission from a Binary System with a 50-year Period

Abeysekara¹,

Benbow²,

Bird³

et al. 2018

ApJL

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We report on observations of the pulsar/Be star binary system PSR J2032+4127/MT91 213 in the energy range between 100 GeV and 20 TeV with the Very Energetic Radiation Imaging Telescope Array and Major Atmospheric Gamma Imaging Cherenkov telescope arrays. The binary orbit has a period of approximately 50 years, with the most recent periastron occurring on 2017 November 13. Our observations span from 18 months prior to periastron to one month after. A new point-like gamma-ray source is detected, coincident with the location of PSR J2032+4127/MT91 213. The gamma-ray light curve and spectrum are well characterized over the periastron passage. The flux is variable over at least an order of magnitude, peaking at periastron, thus providing a firm association of the TeV source with the pulsar/Be star system. Observations prior to periastron show a cutoff in the spectrum at an energy around 0.5 TeV. This result adds a new member to the small population of known TeV binaries, and it identifies only the second source of this class in which the nature and properties of the compact object are firmly established. We compare the gamma-ray results with the light curve measured with the X-ray Telescope on board the Neil Gehrels Swift Observatory and with the predictions of recent theoretical models of the system. We conclude that significant revision of the models is required to explain the details of the emission that we have observed, and we discuss the relationship between the binary system and the overlapping steady extended source, TeV J2032+4130.

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Section: Periodmentioning

confidence: 99%

Periastron Observations of TeV Gamma-Ray Emission from a Binary System with a 50-year Period

Abeysekara¹,

Benbow²,

Bird³

et al. 2018

ApJL

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“…The most recent periastron passage occurred on 13 November 2017 (=JD 2458070) and, given the long binary period, this offered the first opportunity to study this event with an array of telescopes at different wavelengths (see, for example, (Li et al 2018;Kolka et al 2017;Bednarek, Banasiński, & Sitarek 2018)). In this paper we present the X-ray measurements obtained by the Neil Gehrels Swift Observatory plus ground-based optical spectroscopy from the Liverpool Telescope.…”

Section: Introductionmentioning

confidence: 99%

The semicentennial binary system PSR J2032+4127 at periastron: X-ray photometry, optical spectroscopy and SPH modelling.

Coe

Okazaki

Steele

et al. 2019

Monthly Notices of the Royal Astronomical Society

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X-ray photometry and optical spectra are presented covering the periastron passage of the highly-eccentric, ∼50 year binary system PSR J2032+4127 in November 2017. This system consists of a 143 ms pulsar in orbit around a massive OB star, MT 91-213. The data show dramatic changes during the encounter as the pulsar wind collided with the stellar wind. The X-ray flux rose on the approach to periastron, then underwent a major dip in the few days around periastron, and then gradually declined over the next few weeks. The optical spectroscopy revealed a steady decline in the Hα line strength on the approach to periastron (from an Equivalent Width of -15Å to -7Å) implying a truncation of the OB star's circumstellar disk by the approaching neutron star. Smooth Particle Hydrodynamic (SPH) modelling is used here to model the system within the context of the observed behaviour and predict the geometrical configuration of the circumstellar disk with respect to the pulsar's orbit.

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“…This object lies on the edge of TeV emission area. In [17] spectra gamma-ray emission of the IC origin from the system are calculated, shown in the Fig. 1 with dash and dash-dot lines.…”

Section: Tev J2032+4130 At Very High Energiesmentioning

confidence: 99%

Unresolved nature source TeV J2032+4130

et al. 2022

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Cygnus Region contains many objects that are bright in all wavelengths, including one of the most powerful active star formation regions: Cyg OB2, pulsars, and supernova remnants. Some of the sources have been detected at high and very high energies. One of them was discovered due to the proximity to well-known microquasar Cyg X-3 is object TeV J2032+4130. This object is still of unresolved nature and is being intensively studied in the different energy ranges. The numerous X-ray point sources and diffuse X-ray emission regions were found within the TeV J2032+4130 region by Chandra and Suzaku. Intensities detected in X-rays from these regions may favor a scenario with the dominantly nucleonic, not electronic origin of TeV emission. The results of the twenty-year observation of TeV J2032+4130 object by the SHALON experiment are presented. The collected experimental data on fluxes, spectrum shape, and morphology of TeV J2032+413 can help determine an object type and shed light on the source nature.

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Gamma-rays from the binary system containing PSR J2032+4127 during its periastron passage

Cited by 8 publications

References 63 publications

Periastron Observations of TeV Gamma-Ray Emission from a Binary System with a 50-year Period

Periastron Observations of TeV Gamma-Ray Emission from a Binary System with a 50-year Period

The semicentennial binary system PSR J2032+4127 at periastron: X-ray photometry, optical spectroscopy and SPH modelling.

Unresolved nature source TeV J2032+4130

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