C.D.S. - SIMBAD4 rel 1.7 - 2021.01.27CET18:52:39

2001A&A...380..186H - Astronomy and Astrophysics, volume 380, 186-189 (2001/12-2)

Apparent radii of neutron stars and equation of state of dense matter.


Abstract (from CDS):

Apparent (radiation) radius of neutron star, R, depends on the star gravitational mass in quite a different way than the standard coordinate radius in the Schwarzschild metric, R. We show that, for a broad set of equations of state of dense matter, R(Mmax) for the configurations with maximum allowable masses is very close to the absolute lower bound on R at fixed M, resulting from the very definition of R. Also, the value of R at given M, corresponding to the maximum compactness (minimum R) of neutron star consistent with general relativity and condition vsound<c, is only 0.6% higher than this absolute lower bound. Theoretical predictions for R are compared with existing observational estimates of the apparent radii of neutron stars.

Abstract Copyright:

Journal keyword(s): dense matter - equation of state - stars: neutron - stars

Simbad objects: 3

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Number of rows : 3

N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
1 2E 3049 X 13 26 19.796 -47 29 10.51   26.8   25.3   ~ 19 0
2 NGC 5139 GlC 13 26 47.28 -47 28 46.1   6.12 5.33     ~ 3056 0
3 RX J1856.6-3754 N* 18 56 35.11 -37 54 30.5     25.7     ~ 391 0

    Equat.    Gal    SGal    Ecl

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