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

Tiziana Di Salvo, Roberta Amato, Alessio Marino, Rosario Iaria, D'Aì, Marino, Amato, Del Santo, De Martino, Mineo

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Abstract

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 × 1030 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.
Lingua originaleEnglish
pagine (da-a)3992-4000
Numero di pagine9
RivistaMonthly Notices of the Royal Astronomical Society
Volume486
Stato di pubblicazionePublished - 2019

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globular clusters
pulsars
x rays
radio
rays
catalogs
luminosity
XMM-Newton telescope
Hubble Space Telescope
erg
newton
boxes
power law
shock
statistics
photons
energy

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cita questo

@article{96db739a76104c419a331cbf0b52412d,
title = "Search for multiwavelength emission from the binary millisecond pulsar PSR J1836-2354A in the globular cluster M22",
abstract = "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 × 1030 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.",
keywords = "Globular clusters: individual: M22 (NGC 6656), Pulsars: general, X-rays: binaries, X-rays: individual: PSR J1836-2354A",
author = "{Di Salvo}, Tiziana and Roberta Amato and Alessio Marino and Rosario Iaria and D'A{\`i} and Marino and Amato and {Del Santo} and {De Martino} and Mineo",
year = "2019",
language = "English",
volume = "486",
pages = "3992--4000",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Oxford University Press",

}

TY - JOUR

T1 - Search for multiwavelength emission from the binary millisecond pulsar PSR J1836-2354A in the globular cluster M22

AU - Di Salvo, Tiziana

AU - Amato, Roberta

AU - Marino, Alessio

AU - Iaria, Rosario

AU - D'Aì, null

AU - Marino, null

AU - Amato, null

AU - Del Santo, null

AU - De Martino, null

AU - Mineo, null

PY - 2019

Y1 - 2019

N2 - 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 × 1030 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.

AB - 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 × 1030 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.

KW - Globular clusters: individual: M22 (NGC 6656)

KW - Pulsars: general

KW - X-rays: binaries

KW - X-rays: individual: PSR J1836-2354A

UR - http://hdl.handle.net/10447/387768

UR - https://academic.oup.com/mnras/issue

M3 - Article

VL - 486

SP - 3992

EP - 4000

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

ER -