On the Formation of PSR J1640+2224: A Neutron Star Born Massive?

Deng, Zhu-Ling; Gao, Zhi‐Fu; Li, Xiangdong; Shao, Yong

doi:10.3847/1538-4357/ab76c4

Cited by 45 publications

(21 citation statements)

References 65 publications

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“…However, it should be noted that the value from NG12.5 is better than 1σ consistent with the extrapolated value from NG11, whereas the value from the wideband analysis is ∼ 2σ consistent with the extrapolated value from NG9. Fonseca et al (2016) followed up on NG9 and suspected that J1640+2224 is a massive neutron star (see also Deng et al 2020); the improvements on the mass measurements will be presented elsewhere.…”

Section: J1640+2224mentioning

confidence: 99%

The NANOGrav 12.5 yr Data Set: Observations and Narrowband Timing of 47 Millisecond Pulsars

Alam¹,

Arzoumanian²,

Baker³

et al. 2020

ApJS

136

109

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We present a new analysis of the profile data from the 47 millisecond pulsars comprising the 12.5year data set of the North American Nanohertz Observatory for Gravitational Waves (NANOGrav), which is presented in a parallel paper (Alam et al. 2020, NG12.5). Our reprocessing is performed using "wideband" timing methods, which use frequency-dependent template profiles, simultaneous time-of-arrival (TOA) and dispersion measure (DM) measurements from broadband observations, and novel analysis techniques. In particular, the wideband DM measurements are used to constrain the DM portion of the timing model. We compare the ensemble timing results to NG12.5 by examining the timing residuals, timing models, and noise model components. There is a remarkable level of agreement across all metrics considered. Our best-timed pulsars produce encouragingly similar results to those from NG12.5. In certain cases, such as high-DM pulsars with profile broadening, or sources that are weak and scintillating, wideband timing techniques prove to be beneficial, leading to more precise timing model parameters by 10 − 15%. The high-precision, multi-band measurements of several pulsars indicate frequency-dependent DMs. Compared to the narrowband analysis in NG12.5, the TOA volume is reduced by a factor of 33, which may ultimately facilitate computational speed-ups for complex pulsar timing array analyses. This first wideband pulsar timing data set is a stepping stone, and its consistent results with NG12.5 assure us that such data sets are appropriate for gravitational wave analyses.

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Section: J1640+2224mentioning

confidence: 99%

The NANOGrav 12.5 yr Data Set: Observations and Narrowband Timing of 47 Millisecond Pulsars

Alam¹,

Arzoumanian²,

Baker³

et al. 2020

ApJS

136

109

View full text Add to dashboard Cite

show abstract

“…Dong et al (2014)) found that both “outliers” of BH XRBs and bright AGNs follow a steeper fundamental plane of black hole activity. Coriat et al (2011) argued that the two fundamental planes are regulated by radiatively inefficient (e.g., ADAF) and radiatively efficient accretion processes (e.g., SSD + corona), respectively, if we assume the jet launching and radio radiation behave identically (see also, Deng et al 2020; Gao et al 2011a; Fu et al 2020; Li et al 2016; Zhu et al 2016; Wang et al 2020).…”

Section: Introductionmentioning

confidence: 99%

The fundamental plane of black hole activity for quiescent sources

Dong

Liu

et al. 2021

Astron Nachr

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In this work, we construct a sample of black hole X-ray binaries (BH XRBs), low-luminosity active galactic nuclei (LLAGNs), and FR Is with wider distribution of Eddington ratios and re-explore their fundamental plane of BH activities, that is, log L R = X log L X + M log L M BH + c 0. We find that the quiescent BH sources follow a similar fundamental plane (ξ X ∼ 0.6) with sub-Eddington BH sources very well, while the strong radio sources (e.g., FR Is) follow a steeper fundamental plane (ξ X ∼ 1.30). We also find that the radio-X-ray correlation of quiescent BH sources are still on the extension of sub-Eddington BH sources and the strong radio sources follow a steeper correlation (ξ X ∼ 1.30). The results are consistent with recent observations in BH XRBs. It is predicted that the X-ray emissions of both sub-Eddington BH sources and quiescent BH sources originate from radiatively inefficient accretion mode, while the X-ray emissions of strong radio sources dominantly originate from the jet.

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“…Laboratory experiments will provide an emerging understanding of nuclear matter EOS and the transition to deconfined quark matter. Hopefully, the high density behavior of the NS EOS can be determined soon, shedding light on many unsolved problems in nuclear physics and high-energy astrophysics [e.g., 310,311,312,313,314,315].…”

Section: Summary and Perspectivesmentioning

confidence: 99%

Neutron star equation of state: QMF modeling and applications

Li,

Zhu,

Zhou

et al. 2020

Preprint

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Because of the development of many-body theories of nuclear matter, the longstanding, open problem of the equation of state (EOS) of dense matter may be understood in the near future through the confrontation of theoretical calculations with laboratory measurements of nuclear properties & reactions and increasingly accurate observations in astronomy. In this review, we focus on the following six aspects: 1) providing a survey of the quark mean-field (QMF) model, which consistently describes a nucleon and many-body nucleonic system from a quark potential; 2) applying QMF to both nuclear matter and neutron stars; 3) extending QMF formalism to the description of hypernuclei and hyperon matter, as well as hyperon stars; 4) exploring the hadron-quark phase transition and hybrid stars by combining the QMF model with the quark matter model characterized by the sound speed; 5) constraining interquark interactions through both the gravitational wave signals and electromagnetic signals of binary merger event GW170817; and 6) discussing further opportunities to study dense matter EOS from compact objects, such as neutron star cooling and pulsar glitches.

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On the Formation of PSR J1640+2224: A Neutron Star Born Massive?

Cited by 45 publications

References 65 publications

The NANOGrav 12.5 yr Data Set: Observations and Narrowband Timing of 47 Millisecond Pulsars

The NANOGrav 12.5 yr Data Set: Observations and Narrowband Timing of 47 Millisecond Pulsars

The fundamental plane of black hole activity for quiescent sources

Neutron star equation of state: QMF modeling and applications

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