| | |
| | |
Stat |
Members: 3667 Articles: 2'599'751 Articles rated: 2609
07 February 2025 |
|
| | | |
|
Article overview
| |
|
Rotating Skyrmion Stars | Rachid OUYED
; | Date: |
9 Jul 2001 | Subject: | astro-ph | Affiliation: | NORDITA, Copenhagen, Denmark | Abstract: | In a previous paper, using an equation of state of dense matter representing a fluid of Skyrmions we constructed the corresponding non-rotating compact-star models in hydrostatic equilibrium; these are mostly fluid stars (the Skyrmion fluid) thus naming them {it Skyrmion Stars}. Here we generalize our previous calculations by constructing equilibrium sequences of rotating Skyrmion stars in general relativity using the computer code {it RNS} developed by Stergioulas. We calculated their masses and radii to be 0.4 le M/M_{odot} le 3.45, and 13.0 {
m km}le Rle 23.0 {
m km}, respectively (R being the circumferential radius of the star). The period of the maximally rotating Skyrmion stars is calculated to be 0.8 {
m ms}le P le 2.0 {
m ms}. We find that a gap (the height between the star surface and the inner stable circular orbit) starts to appear for Msim 2.0M_{odot}. Specifically, the Skyrmion star mass range with an existing gap is calculated to be 1.8 < M/ M_{odot} < 3.0 with the corresponding orbital frequency 0.8 {
m kHz} <
u_{
m ISCO} < 1.3 {
m kHz}. We apply our model to the 4U 1820-30 low mass X-ray binary and suggest a plausible Skyrmion star candidate in the 4U 1636-53 system. We discuss the difficulties encountered by our model in the 4U 0614+09 case with the highest known Quasi-Periodic Oscillation frequency of 1329 Hz. A comparative study of Skyrmion stars and models of neutron stars based on recent/modern equations of state is also presented. | Source: | arXiv, astro-ph/0107154 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
|
| |
|
|
|