Search for multiwavelength emission from the binary millisecond pulsar PSR J1836-2354A in the globular cluster M22 - Archive ouverte HAL
Article Dans Une Revue Monthly Notices of the Royal Astronomical Society Année : 2019

Search for multiwavelength emission from the binary millisecond pulsar PSR J1836-2354A in the globular cluster M22

R. Amato
  • Fonction : Auteur
A. d'Aì
  • Fonction : Auteur
M. del Santo
  • Fonction : Auteur
D. de Martino
  • Fonction : Auteur
T. Di Salvo
  • Fonction : Auteur
R. Iaria
  • Fonction : Auteur
T. Mineo
  • Fonction : Auteur

Résumé

We present a multiband search for X-ray, optical, and γ-ray emission of the radio binary millisecond pulsar J1836-2354A, hosted in the globular cluster M22. X-ray emission is significantly detected in two Chandra observations, performed in 2005 and 2014, at a luminosity of ∼2–3 × 10^30 erg s^−1, in the 0.5–8 keV energy range. The radio and the X-ray source positions are found consistent within 1σ error box. No detection is found in archival XMM–Newton and Swift/XRT observations, compatible with the Chandra flux level. The low statistics prevents us to assess if the X-ray source varied between the two observations. The X-ray spectrum is consistent with a power-law of photon index ∼1.5. We favour as the most probable origin of the X-ray emission an intrabinary shock scenario. We searched for optical and γ-ray counterparts to the radio source using data from Hubble Space Telescope and Fermi–LAT catalogues, respectively. No optical counterpart down to V = 25.9 and I = 24.7 (3σ) is detected, which suggests a companion mass of 0.1–0.2 M_⊙. Combined with the low X-ray luminosity, this is consistent with a black widow nature of PSR J1636-2354A. Inspecting the 8-year Fermi–LAT catalogue, we found a γ-ray source, 4FGL J1836.8–2354, with a positional uncertainty consistent with the globular cluster, but not with the radio position of the millisecond pulsar.
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Dates et versions

hal-02136888 , version 1 (30-06-2023)

Identifiants

Citer

R. Amato, A. d'Aì, M. del Santo, D. de Martino, A. Marino, et al.. Search for multiwavelength emission from the binary millisecond pulsar PSR J1836-2354A in the globular cluster M22. Monthly Notices of the Royal Astronomical Society, 2019, 486 (3), pp.3992-4000. ⟨10.1093/mnras/stz1100⟩. ⟨hal-02136888⟩
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