Compact bifluid hybrid stars: hadronic matter mixed with self-interacting fermionic asymmetric dark matter

Mukhopadhyay, S.; Atta, Debasis; Imam, Kouser; Basu, Debabrata; Samanta, C.

doi:10.1140/epjc/s10052-017-5006-3

Cited by 41 publications

(35 citation statements)

References 61 publications

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“…We considered fermionic Asymmetric Dark Matter (ADM) particles of mass 1 GeV mixed with rotating and non-rotating neutron stars [72]. ADM, like ordinary baryonic matter, is charge asymmetric with only the dark baryon (or generally only the particle) excess remains after the annihilation of and varying dark matter central enthalpies.…”

Section: Dark Mattermentioning

confidence: 99%

Superheavy Nuclei to Hypernuclei: A Tribute to Walter Greiner

Samanta

2018

EPJ Web Conf.

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In nuclear physics, superheavy and hypernuclei are two of the most important fields of research. The prediction of islands of superheavy elements (Z = 114, N = 184, 196 and Z = 164, N = 318) in late sixties by the Frankfurt school played a key role in extending the periodic table of elements up to atomic number 118. Similarly, the demonstration that nuclear matter can be compressed 510 times of its original volume by nuclear shock waves, produced during heavy ion collision, led to the production of singleand double-lambda hypernuclei, as well as anti-matter nuclei. Recent observation of antihypertriton—comprising an antiproton, an antineutron, and an antilambda hyperon, by the STAR collaboration has now made it possible to envision a 3-dimensional nuclear chart of hypernuclei. My own interest in superheavy and hypernuclei was shaped from my first meeting with Walter Greiner at the International Conference on Atomic and Nuclear clusters held at Santorini, Greece in 1993. I will present a brief summary of these exciting developments, including some of our own work. Professor Greiner’s vision, enthusiasm, and encouragement touched many lives and I was one of those privileged ones.

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Section: Dark Mattermentioning

confidence: 99%

Superheavy Nuclei to Hypernuclei: A Tribute to Walter Greiner

Samanta

2018

EPJ Web Conf.

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“…Moreover, the maximum value of the magnetic field at the centre is kept at 10B c which is 4.414 × 10 14 gauss, lower than the maximum limit prescribed by N. Chamel et al (41) and surface magnetic field strength ∼ 10 9 gauss determined from observational data (18; 19; 20). For Landau quantized EoS, we get stable super-Chandrasekhar white dwarf masses (10). Table -I shows variations of the masses and radii of non-magnetized white dwarfs with central electron number density n e .…”

Section: Critical Frequencies Spindown and Spindown Rates Of Sub-and ...mentioning

confidence: 88%

Gravitational waves from r-mode instability of massive young sub- and super-Chandrasekhar white dwarfs

Mukhopadhyay,

Banik

2020

Preprint

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In the present work we investigate the rmode instability windows, spindown and spindown rates of sub-and super-Chandrasekhar magnetized white dwarfs in presence of Landau quantization of the electron gas and magnetic braking. The gravitational wave strain amplitudes due to r-mode instability is also calculated. The dominant damping mechanism is taken to be the shear viscosity arising due to scattering of the degenerate electrons from the ion liquid. We find that the critical frequencies of Landau quantized magnetized white dwarfs are the lowest, those of non-Landau quantized ones are higher and those of non-magnetized ones are the highest at the same temperature. This implies that magnetic braking and Landau quantization both enhance r-mode instability. We have also seen that there is rapid spindown of magnetized white dwarfs due to additional magnetic braking term but there is no considerable effect of Landau quantization on the spindown and spindown rates for magnetic field strengths relevant for white dwarf interiors. We find that the rmode gravitational wave strain amplitude for a rapidly rotating super-Chandrasekhar white dwarf at 1 kpc is ∼ 10 −27 , making isolated massive rapidly rotating hot magnetized white dwarfs prime candidates for search of gravitational waves in the future.

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“…In this paper, we will mainly consider the hybrid stars by solving the following TOV configurations with multiple component fluids inside the star [19,20]:…”

Section: Btm Criteria and Saddle Instability For Hybrid Starsmentioning

confidence: 99%

Constraint on Hybrid Stars with Gravitational Wave Events

Hong

Lin

2020

Universe

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Motivated by the recent discoveries of compact objects from LIGO/Virgo observations, we study the possibility of identifying some of these objects as compact stars made of dark matter called dark stars, or the mix of dark and nuclear matters called hybrid stars. In particular, in GW190814, a new compact object with 2.6 M⊙ is reported. This could be the lightest black hole, the heaviest neutron star, and a dark or hybrid star. In this work, we extend the discussion on the interpretations of the recent LIGO/Virgo events as hybrid stars made of various self-interacting dark matter (SIDM) in the isotropic limit. We pay particular attention to the saddle instability of the hybrid stars which will constrain the possible SIDM models.

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Compact bifluid hybrid stars: hadronic matter mixed with self-interacting fermionic asymmetric dark matter

Cited by 41 publications

References 61 publications

Superheavy Nuclei to Hypernuclei: A Tribute to Walter Greiner

Superheavy Nuclei to Hypernuclei: A Tribute to Walter Greiner

Gravitational waves from r-mode instability of massive young sub- and super-Chandrasekhar white dwarfs

Constraint on Hybrid Stars with Gravitational Wave Events

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