Is PSR B0943+10 a Low-Mass Quark Star?

  title={Is PSR B0943+10 a Low-Mass Quark Star?},
  author={Youling Yue and X H Cui and Ren-xin Xu},
  journal={The Astrophysical Journal},
A recent X-ray observation has shown that the radio pulsar PSR B0943+10, with clear drifting subpulses, has a much smaller polar cap area than that of conventional pulsars with mass of ~1 M☉ and radius of ~10 km. Zhang and coworkers have addressed the fact that this new result conflicts with the standard vacuum gap model. Nonetheless, the discrepancy could be explained if PSR B0943+10 is actually a low-mass quark star. We find that the potential drop in the open field line region of oblique… Expand

Figures from this paper

XMM-Newton Observations of Radio Pulsars B0834+06 and B0826?34 and Implications for the Pulsar Inner Accelerator
We report the X-ray observations of two radio pulsars with drifting subpulses, B0834+06 and B0826?34, using XMM-Newton. PSR B0834+06 was detected with a total of 70 counts from the three EPICExpand
0 Se p 20 07 Possible evidence that pulsars are quark stars
It is a pity that the real state of matter in pulsar-like stars is till not determined confidently because of the uncertainty about cold matter at supr anuclear density, even 40 years after theExpand
High braking index pulsar PSR J1640-4631: low-mass neutron star with a large inclination angle?
Recent timing observation constrained the braking index of the X-ray pulsar PSR J1640-4631 to be n = 3.15 ± 0.03, which is the highest value of all pulsars with measured braking indices so far. InExpand
Pulsar slow glitches in a solid quark star model
A series of five unusual slow glitches of the radio pulsar B1822-09 (PSR J1825-0935) was observed between 1995 and 2005. This is a phenomenon that is understood in a solid quark star model, andExpand
PSR B1828–11: a precession pulsar torqued by a quark planet?
The pulsar PSR B1828−11 has long-term, highly periodic and correlated variations in both pulse shape and the rate of slow-down. This phenomenon may provide evidence for the precession of the pulsarExpand
Millisecond pulsars modelled as strange quark stars admixed with condensed dark matter.
We study for the first time how a new class of stars could impact an ensemble of pulsars with known masses and spin-periods. These new compact objects are strange stars admixed with condensed darkExpand
The Birth of Quark Stars: Photon-driven Supernovae?
In this Letter we propose a possible mechanism for trying to alleviate the current difficulty in core-collapse supernovae by forming a strange quark star inside the collapsing core. Although theExpand
Possible evidence that pulsars are quark stars
It is a pity that the real state of matter in pulsar‐like stars is still not determined confidently because of the uncertainty about cold matter at supranuclear density, even 40 years after theExpand
AXPs/SGRs: Magnetars or quark-stars?
Abstract The magnetar model and a solid quark star model for anomalous X-ray pulsars/soft gamma-ray repeaters (AXPs/SGRs) are discussed. Different manifestations of pulsar-like stars are speculatedExpand
Strange quark stars: observations and speculations
Two kinds of difficulties have challenged the physics community for many years: (1) knowing nature's building blocks (particle physics) and (2) understanding interacting many-body systems (many-bodyExpand


Is RX J1856.5-3754 a Quark Star?
Deep Chandra Low Energy Transmission Grating and High Resolution Camera spectroscopic observations of the isolated neutron star candidate RX J1856.5-3754 have been analyzed to search for metallic andExpand
An XMM-Newton Observation of the Drifting Pulsar B0943+10
Radio pulsar subpulse drifting has been interpreted as rotation of subbeams (sparks) of pair plasma produced by intermittent breakdowns of an inner vacuum gap above the pulsar polar cap. This modelExpand
PSR 0943+10: A bare strange star?
Recent work by Rankin & Deshpande strongly suggests that there exist strong "microstorms" rotating around the magnetic axis of the 1.1 s pulsar PSR 0943+10. Such a feature hints that most probablyExpand
GCRT J1745—3009: a precessing radio pulsar?
A unique transient bursting radio source, GCRT J1745-3009,has been discovered (Hyman et al. 2005a) near the direction of the Galactic center. It is still an open question to explain this phenomenon,Expand
1E 1207.4-5209: a low-mass bare strange star?
Both rotation- and accretion-powered low-mass bare strange stars are studied, with particular regard to their astrophysical appearance. It is suggested that low-mass bare strange stars, with weakerExpand
Pulsars with strong magnetic fields: polar gaps, bound pair creation and nonthermal luminosities
Modifications to polar-gap models for pulsars are discussed for the case where the surface magnetic field, Bs, of the neutron star is strong. For B ~ 4 X 108 T, the curvature ,-quanta emittedExpand
Revised Pulsar Spin-down
We address the issue of electromagnetic pulsar spin-down by combining our experience from the two limiting idealized cases that have been studied thoroughly in the past: that of an aligned rotator,Expand
Bare Quark Stars or Naked Neutron Stars? The Case of RX J1856.5–3754
In a cool neutron star (T 106 K) endowed with a rather high magnetic field (B 1013 G), a phase transition may occur in the outermost layers. As a consequence, the neutron star becomes "bare," i.e.,Expand
What if pulsars are born as strange stars
Abstract The possibility and the implications of the idea, that pulsars are born as strange stars, are explored. Strange stars are very likely to have atmospheres with typical mass of ∼5×10−15M⊙ butExpand
Drifting subpulses and inner acceleration regions in radio pulsars
The classical vacuum gap model of Ruderman & Sutherland, in which spark-associated subbeams of subpulse emission circulate around the magnetic axis due to the E × B drift of spark plasma filaments,Expand