Evidence for strange stars from joint observation of harmonic absorption bands and of redshift

Abstract

From recent reports on terrestrial heavy ion collision experiments it appears that one may not obtain information about the existence of asymptotic freedom (AF) and chiral symmetry restoration (CSR) for quarks of QCD at high density. This information may still be obtained from compact stars - if they are made up of strange quark matter. Very high gravitational redshift lines (GRL), seen from some compact stars, seem to suggest high ratios of mass and radius (M/R) for them. This is suggestive of strange stars (SS) and can in fact be fitted very well with SQM equation of state deduced with built in AF and CSR. In some other stars broad absorption bands appear at about ~ 0.3 keV and multiples thereof, that may fit in very well with resonance with harmonic compressional breathing mode frequencies of these SS. Emission at these frequencies are also observed in six stars. If these two features of large GRL and BAB were observed together in a single star, it would strengthen the possibility for the existence of SS in nature and would vindicate the current dogma of AF and CSR that we believe in QCD. Recently, in 4U 1700-24, both features appear to be detected, which may well be interpreted as observation of SS - although the group that analyzed the data did not observe this possibility. We predict that if the shifted lines, that has been observed, are from neon with GRL shift z = 0.4 - then the compact object emitting it is a SS of mass 1.2 M_sun and radius 7 km. In addition the fit to the spectrum leaves a residual with broad dips at 0.35 keV and multiples thereof, as in 1E1207-5209 which is again suggestive of SS.

arXiv comment5 pages, 4 figures, accepted for publication in the MNRAS

References in corpus (24)

• Quark Gluon Plasma an Color Glass Condensate at RHIC? The perspective from the BRAHMS experiment
• The PHOBOS Perspective on Discoveries at RHIC
• MeV Dark Matter: Has It Been Detected?
• Identified particle distributions in pp and Au+Au collisions at sqrt{s_NN}=200 GeV
• Gravitationally redshifted absorption lines in the X-ray burst spectra of a neutron star
• Strange Stars with Realistic Quark Vector Interaction and Phenomenological Density-dependent Scalar Potential
• Is SAX J1808.4-3658 a Strange Star ?
• Discovery of absorption features in the X-ray spectrum of an isolated neutron star
• Quark deconfinement and implications for the radius and the limiting mass of compact stars
• Rotational Evolution During Type I X-Ray Bursts
• Ultracompact X-Ray Binaries with Neon-Rich Degenerate Donors
• On the nature of the compact star in 4U 1728-34
• 511 KeV Photons From Color Superconducting Dark Matter
• What if pulsars are born as strange stars?
• Superbursts from Strange Stars
• Superbursts and long bursts as surface phenomenon of compact objects
• Origin and interpretation of kilohertz QPOs from strange stars in X-ray binary system: theoretical hydrodynamical description
• Discovery of a redshifted X-ray emission line in the symbiotic neutron star binary 4U 1700+24
• A model finding a new Richardson potential with different scales for confinement and asymptotic freedom, by fitting the properties of ${\D}^{++}$ and ${\Om}^{-}$
• Have we observed the skin vibration of realistic strange stars (ReSS) ?
• Possible evidence of surface vibration of strange stars from stellar observations
• Newtonian and general relativistic contribution of gravity to surface tension of strange stars
• Strange Pulsar Hypothesis
• Strange stars and superbursts at near-Eddington mass accretion rates

Cited by in corpus (5)

• Measurement of neutron star parameters: a review of methods for low-mass X-ray binaries
• Determining the neutron star equation of state using the narrow-band gravitational wave detector Schenberg
• A powerful e^{+-} outflow driven by a proto-strange quark star
• Bound for entropy and viscosity ratio for strange quark matter
• X-ray views of neutron star low-mass X-ray binaries