Mass Ejection by Strange Star Mergers and Observational Implications

Bauswein, Andreas; Janka, Hans‐Thomas; Oechslin, R.; Pagliara, Giuseppe; Sagert, Irina; Schaffner-Bielich, J.; Hohle, M. M.; Neuhäuser, R.

doi:10.1103/physrevlett.103.011101

Cited by 101 publications

(107 citation statements)

References 42 publications

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“…Therefore, it is reasonable to expect that it exists in some form in the Universe and can be detected. This supposition resulted in a number of searches for strange stars and quark stars, in which such a form of matter would be dominant and which could therefore be a possible source of strangelets penetrating outer space [22][23][24][25][26][27][28][29]. The experimental data mentioned above lead to a flux of strangelets which follows the A −7.5 behaviour, which in turn coincides with the behaviour of the abundance of 1 Nev…”

Section: Introductionmentioning

confidence: 88%

On muon bundles from the Universe

Kankiewicz

Rybczyński

Włdarczyk

et al. 2018

EPJ Web of Conferences

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Abstract. Recently the CERN ALICE experiment, in its dedicated cosmic ray run, observed muon bundles of very high multiplicities, thereby confirming similar findings from the LEP era at CERN (in the CosmoLEP project). We found significant evidence for anisotropy of arrival directions of the observed high multiplicity muonic bundles. The distribution on celestial sphere and the estimated directionality suggests their possible extragalactic source. We argue that muonic bundles of highest multiplicity are produced by strangelets, hypothetical stable lumps of strange quark matter infiltrating our Universe.

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Section: Introductionmentioning

confidence: 88%

On muon bundles from the Universe

Kankiewicz

Rybczyński

Włdarczyk

et al. 2018

EPJ Web of Conferences

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“…The process of fragmentation of strange quark matter is largely unknown due to the many uncertainties on the quark matter equation of state, it is possible that even if strange quark matter is ejected, a negligible amount of matter fragments into strangelets [57]. Another possibility has been put forward in [58] where for the first time, strange stars merger simulations have been performed. For values of the total mass of the binary system larger than about 3M a prompt collapse to a black hole is obtained, without a preceding formation of an accretion disk around the black hole.…”

Section: Properties Of Compact Starsmentioning

confidence: 97%

Delta isobars in neutron stars

Pagliara

Drago

Lavagno

et al. 2015

EPJ Web of Conferences

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Abstract. The appearance of delta isobars in beta-stable matter is regulated by the behaviour of the symmetry energy at densities larger than saturation density. We show that by taking into account recent constraints on the density derivative of the symmetry energy and the theoretical and experimental results on the excitations of delta isobars in nuclei, delta isobars are necessary ingredients for the equations of state used for studying neutron stars. We analyze the effect of the appearance of deltas on the structure of neutron stars: as in the case of hyperons, matter containing delta is too soft for allowing the existence of 2M neutron stars. Quark stars on the other hand, could reach very massive configurations and they could form from a process of conversion of hadronic stars in which an initial seed of strangeness appears through hyperons.

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“…Second, the total mass of the binary system exceeds 3M in most of the cases. Due to that many of these DQS systems collapse directly to a BH, as indicated by the analysis of Bauswein et al (2009). The exact fraction of events in which the BH is not promptly formed is linked to M Q max , but in any case it cannot exceed 12 events Gyr −1 .…”

Section: Strangelets Pollutionmentioning

confidence: 99%

Strange Quark Stars in Binaries: Formation Rates, Mergers, and Explosive Phenomena

Wiktorowicz

Drago

Pagliara

et al. 2017

ApJ

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Recently, the possible co-existence of a first family composed of "normal" neutron stars with a second family of strange quark stars has been proposed as a solution of problems related to the maximum mass and to the minimal radius of these compact stellar objects. In this paper we study the mass distribution of compact objects formed in binary systems and the relative fractions of quark and neutron stars in different subpopulations. We incorporate the strange quark star formation model provided by the two-families scenario and we perform a large-scale population synthesis study in order to obtain the population characteristics. According to our results, the main channel for strange quark star formation in binary systems is accretion from a secondary companion on a neutron star. Therefore, a rather large number of strange quark stars form by accretion in low-mass X-ray binaries and this opens the possibility of having explosive GRB-like phenomena not related to supernovae and not due to the merger of two neutron stars. The number of double strange quark star's systems is rather small with only a tiny fraction which merge within a Hubble time. This drastically limits the flux of strangelets produced by the merger, which turns out to be compatible with all limits stemming from Earth and Lunar experiments. Moreover, this value of the flux rules out at least one relevant channel for the transformation of all neutron stars into strange quark stars by strangelets' absorption.

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Mass Ejection by Strange Star Mergers and Observational Implications

Cited by 101 publications

References 42 publications

On muon bundles from the Universe

On muon bundles from the Universe

Delta isobars in neutron stars

Strange Quark Stars in Binaries: Formation Rates, Mergers, and Explosive Phenomena

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