RNS is a code written by Nikolaos Stergioulas which constructs models of rapidly rotating, relativistic, compact stars using tabulated equations of state which are supplied by the user. Please direct questions about this program to either Sharon Morsink or Nikolaos Stergioulas.
The code was mainly developed while Stergioulas and Morsink worked at UWM, Nikolaos as a graduate student and Sharon as a postdoc. Currently Nikolaos Stergioulas is an assistant professor at the Aristotle University of Thessaloniki (Greece) and Sharon Morsink is an Associate Professor at University of Alberta (Canada).
The code is based on the method developed by Komatsu, Eriguchi & Hachisu (1989) and modifications introduced by Cook, Shapiro & Teukolsky (1994). It can compute individual models as well as sequences of fixed mass, rest mass, angular velocity or angular momentum models. All models assume uniform rotation. You can read more about this code in Stergioulas and Friedman (1995) and in Nozawa, Stergioulas, Gourgoulhon & Eriguchi (1998) and references therein.
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Version 1 This version of the code is best for users who simply wish to input an equation of state and a parameter (such as angular velocity, mass, etc.) and have the computer output a list of the star's properties.
- rns.v1.1c Nick's 1996 version.
- rns.v1.1d Includes modifications by Sharon Morsink (1997): Prints the star's quadrupole moment (Based on method by Laarakkers and Poisson (1997)); Units for polytropic stars are corrected.
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Version 2 This version of the code is more suitable if you wish to use the results (such as the metric) in another application. The code is modularized so that it is fairly easy to call up from other programs. An example program is included. (Please email Sharon Morsink with suggestions which will make this more user friendly.)
- rns.v2.0 Apr. 13, 1999.
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Nuclear equation of state files are available at eos. An index to the available EOS files is included.
- Nikolaos Stergioulas' web page, with more information and videos about Rotating Relativistic Stars
- Sharon Morsink's web page
- Greg Cook - for supplying some equations of state files
- Shai Ayal - for pointing out an error in a previous version of 2.0
1. astro-ph/9411032 :
Title: COMPARING MODELS OF RAPIDLY ROTATING RELATIVISTIC STARS CONSTRUCTED BY TWO NUMERICAL METHODS
Authors: Nikolaos Stergioulas, John L. Friedman
Comments: 12 pages, AASTEX + 10 postscript figures and postscript version of tex file, accepted for publication in the Astrophysical Journal
Journal-ref: ApJ 444 (1995) 306
Title: The Structure and Stability of Rotating Relativistic Stars
Authors: Nikolaos Stergioulas
Comments: Ph.D Thesis, UWM, Department of Physics, 1996
3. astro-ph/9608179 :
Title: Upper Limit Set by Causality on the Rotation and Mass of Uniformly Rotating Relativistic Stars
Authors: Scott Koranda (Case Western Reserve University), Nikolaos Stergioulas, John L. Friedman (University of Wisconsin- Milwaukee)
Comments: 28 pages, LaTeX2e, 8 Postscript figures, submitted to ApJ
Journal-ref: ApJ 488 (1997) 799
4. gr-qc/9705056 :
Title: Nonaxisymmetric Neutral Modes in Rotating Relativistic Stars
Authors: Nikolaos Stergioulas, John L. Friedman
Comments: 57 pages, 9 figures
Journal-ref: ApJ 492 (1998) 301
5. gr-qc/9709033 :
Title: Quadrupole moments of rotating neutron stars
Authors: William G. Laarakkers, Eric Poisson
Comments: ReVTeX, 7 pages, 5 figures, additional material, and references added
Journal-ref:
6. astro-ph/9712120 :
Title: A General Relativistic Calculation of Boundary Layer and Disk Luminosity for Accreting Non-Magnetic Neutron Stars in Rapid Rotation
Authors: Arun V. Thampan (1), Bhaskar Datta (1 and 2) ((1)Indian Institute of Astrophysics, Bangalore, India, (2)Raman Research Institute, Bangalore, India)
Comments: LaTeX file using mn.sty, 11 pages (including 7 figs, 1 table), uses psbox.tex. Accepted for publication in MNRAS
Journal-ref:
7. gr-qc/9804048 :
Title: Construction of Highly Accurate Models of Rotating Neutron Stars - Comparison of Three Different Numerical Schemes
Authors: Tetsuo Nozawa, Nikolaos Stergioulas, Eric Gourgoulhon, Yoshiharu Eriguchi
Comments: 24 pages with 16 figures, submitted to Astronomy and Astrophysics
Journal-ref: A&AS 132 (1998) 431
8. gr-qc/9805012 :
Title: Rotating Stars in Relativity
Authors: Nikolaos Stergioulas
Comments: 23 pages, review article for Living Reviews in Relativity, this http URL replaced with final version (corrected minor typing errors, updated several sections and added new references)
Journal-ref: Living Reviews in Relativity, Vol. 1, No. 1998-8, (1998)
9. gr-qc/9806008 :
Title: Quasi-normal modes of rotating relativistic stars - neutral modes for realistic equations of state
Authors: Sharon M. Morsink, Nikolaos Stergioulas, Steve R. Blattnig
Comments: 12 pages, 5 figures, submitted to ApJ
Journal-ref:
10. astro-ph/9808227 :
Title: Relativistic precession around rotating neutron stars: Effects due to frame-dragging and stellar oblateness
Authors: Sharon M. Morsink, Luigi Stella
Comments: 35 pages including 10 figures and 6 tables. To appear in the Astrophysical Journal
Journal-ref:
To add or update references, email: Sharon Morsink
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