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Two types of glitches in a solid quark star model.
- Source :
-
Monthly Notices of the Royal Astronomical Society . Sep2014, Vol. 443 Issue 3, p2705-2710. 6p. - Publication Year :
- 2014
-
Abstract
- Glitch (sudden spin-up) is a common phenomenon in pulsar observations. However, the physical mechanism of glitch is still a matter of debate because it depends on the puzzle of pulsar's inner structure, i.e. the equation of state of dense matter. Some pulsars (e.g. Vela like) show large glitches (Δν/ν ∼ 10−6) but release negligible energy, whereas the large glitches of AXPs/SGRs (anomalous X-ray pulsars/soft gamma repeaters) are usually (but not always) accompanied with detectable energy releases manifesting as X-ray bursts or outbursts. We try to understand this aspect of glitches in a starquake model of solid quark stars. There are two kinds of glitches in this scenario: bulk-invariable (type I) and bulk-variable (type II) ones. The total stellar volume changes (and then energy releases) significantly for the latter but not for the former. Therefore, glitches accompanied with X-ray bursts (e.g. that of AXP/SGRs) could originate from type II starquakes induced probably by accretion, while the others without evident energy release (e.g. that of Vela pulsar) would be the result of type I starquakes due to, simply, a change of stellar ellipticity. [ABSTRACT FROM PUBLISHER]
- Subjects :
- *QUARKS
*STAR observations
*PULSARS
*X-ray bursts
*MAGNETARS
Subjects
Details
- Language :
- English
- ISSN :
- 00358711
- Volume :
- 443
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Monthly Notices of the Royal Astronomical Society
- Publication Type :
- Academic Journal
- Accession number :
- 97546895
- Full Text :
- https://doi.org/10.1093/mnras/stu1370