Follow‐up of isolated neutron star candidates from the <scp>eROSITA</scp> survey

Pires, Adriana Mancini; Schwope, A. D.; Motch, C.

doi:10.1002/asna.201713333

Cited by 17 publications

(14 citation statements)

References 31 publications

(48 reference statements)

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“…Nevertheless, the eRASS sensitivity will be about 25 times greater than the ROSAT all-sky survey sensitivity in the 0.2 -2.3 keV soft X-ray range (Predehl et al 2020). Through Monte Carlo simulations, Pires et al (2017) estimated that, on average, about 90 thermally emitting new isolated neutron stars could be detected by the eRASS.…”

Section: Evolution Of Rrats With Fallback Discsmentioning

confidence: 99%

“…This indicates that RRATs could have cooling luminosities in soft X-rays that are much higher than those corresponding to their characteristic ages and comparable to those of XDINs. This puts a significant fraction of RRATs, especially those within 2 kpc, into the list of detectable sources for the 4-year extended Roentgen Survey with an Imaging Telescope Array (eROSITA) all-sky survey (eRASS) which started on December 13, 2019 (Merloni et al 2012;Pires et al 2017). All known XDINs are within a distance of 500 pc 2 https://www.atnf.csiro.au/research/pulsar/psrcat/ show the 𝐵 0 values and final periods for the evolutions seen in Fig.…”

Section: Evolution Of Rrats With Fallback Discsmentioning

confidence: 99%

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On the long-term evolution of rotating radio transients

Gencali,

Ertan

2020

Preprint

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Investigation of the long-term evolution of rotating radio transients (RRATs) is important to understand the evolutionary connections between the isolated neutron star populations in a single picture. The X-ray luminosities of RRATs (except one source) are not known. In the fallback disc model, we have developed a method to estimate the dipole field strengths of RRATs without X-ray information. We have found that RRATs could have dipole field strengths, 𝐵 0 , at the poles ranging from ∼ 7 × 10 9 G to ∼ 6 × 10 11 G which fill the gap between the 𝐵 0 ranges of central compact objects (CCOs) and dim isolated neutron stars (XDINs) estimated in the same model. In our model, most of RRATs are evolving at ages (∼ 2 -6) × 10 5 yr, much smaller than their characteristic ages, such that, cooling luminosities of a large fraction of relatively nearby RRATs could be detected by the eROSITA all-sky survey. Many RRATs are located above the upper border of the pulsar death valley with the fields inferred from the dipole-torque formula, while they do not show strong, continuous radio pulses. The 𝐵 0 values estimated in our model, place all RRATs either into the death valley or below the death line. We have tentatively proposed that RRATs could be the sources below their individual death points, and their short radio bursts could be ignited by the disc-field interaction occasionally enhancing the flux of open field lines through the magnetic poles. We have also discussed the evolutionary links between CCOs, RRATs and XDINs.

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Section: Evolution Of Rrats With Fallback Discsmentioning

confidence: 99%

Section: Evolution Of Rrats With Fallback Discsmentioning

confidence: 99%

On the long-term evolution of rotating radio transients

Gencali,

Ertan

2020

Preprint

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“…In addition to observations of already known sources, eROSITA will detect new isolated NSs. In a recent study by Pires, Schwope, & Motch (2017), the population synthesis of cooling NSs was used to predict the observability of such sources in the eROSITA fouryear survey. Depending on the filter configuration, simulations yield 85 to 95 isolated thermal NSs.…”

Section: Search Criteria For New Sourcesmentioning

confidence: 99%

Observability of isolated neutron stars at SRG/eROSITA

Khokhriakova¹,

Biryukov²,

Popov³

2022

Preprint

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A four-year sky survey with the use of the eROSITA telescope on board the Spektr-RG observatory will provide the best coverage in the soft (0.5-2 keV) and standard (2-10 keV) X-ray ranges, both in terms of sensitivity and angular resolution. We have analysed the possibility of detecting various types of isolated neutron stars with eROSITA. Among already known objects, eROSITA will be able to detect more than 160 pulsars, 21 magnetars, 7 central compact objects, all seven sources of the Magnificent Seven, and two other X-ray isolated neutron stars during the four-year survey mission.

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“…To estimate the number of isolated neutron stars to be detected in the eRASS through their thermal X-ray emission, we performed Monte Carlo simulations of a population synthesis model (Pires et al 2017). Our study indicates an expected number of up to 100 thermally emitting neutron stars to be detected in the eRASS.…”

Section: Erosita: Forecast and Harvestingmentioning

confidence: 99%

What will eROSITA reveal among X-ray faint isolated neutron stars?

Pires

2017

Proc. IAU

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Since the discovery of the first radio pulsar fifty years ago, the population of neutron stars in our Galaxy has grown to over 2,600. A handful of these sources, exclusively seen in Xrays, show properties that are not observed in normal pulsars. Despite their scarcity, they are key to understanding aspects of the neutron star phenomenology and evolution. The forthcoming all-sky survey of eROSITA will unveil the X-ray faint end of the neutron star population at unprecedented sensitivity; therefore, it has the unique potential to constrain evolutionary models and advance our understanding of the sources that are especially silent in the radio and γ-ray regimes. In this contribution I discuss the expected role of eROSITA, and the challenges it will face, at probing the galactic neutron star population.

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Follow‐up of isolated neutron star candidates from the eROSITA survey

Cited by 17 publications

References 31 publications

On the long-term evolution of rotating radio transients

On the long-term evolution of rotating radio transients

Observability of isolated neutron stars at SRG/eROSITA

What will eROSITA reveal among X-ray faint isolated neutron stars?

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