2006A&A...458..523S


Query : 2006A&A...458..523S

2006A&A...458..523S - Astronomy and Astrophysics, volume 458, 523-532 (2006/11-1)

Consistency between deep crustal heating of strange stars in superbursters and soft X-ray transients.

STEJNER M. and MADSEN J.

Abstract (from CDS):

Both superbursters and soft X-ray transients probe the process of deep crustal heating in compact stars. It was recently shown that the transfer of matter from crust to core in a strange star can heat the crust and ignite superbursts provided certain constraints on the strange quark matter equation of state are fulfilled. We derive corresponding constraints on the equation of state for soft X-ray transients assuming their quiescent emission is powered in the same way, and further discuss the time dependence of this heating mechanism in transient systems. We approach this using a simple parametrized model for deep crustal heating in strange stars assuming slow neutrino cooling in the core and blackbody photon emission from the surface. The constraints derived for hot frequently accreting soft X-ray transients are always consistent with those for superbursters. The colder sources are consistent for low values of the quark matter binding energy, heat conductivity and neutrino emissivity. The heating mechanism is very time dependent which may help explain cold sources with long recurrence times. Thus deep crustal heating in strange stars can provide a consistent explanation for superbursters and soft X-ray transients.

Abstract Copyright:

Journal keyword(s): stars: neutron - dense matter - equation of state - X-rays: binaries - X-rays: bursts - X-rays: general

Simbad objects: 10

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Number of rows : 10
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 V* V822 Cen LXB 14 58 21.9347842080 -31 40 07.515432768 11.95 12.85 12.8     K3-K7V 530 0
2 V* QX Nor LXB 16 12 43.0 -52 25 23           ~ 871 1
3 MXB 1658-298 LXB 17 02 06.54 -29 56 44.1 18.35 18.75 18.3     ~ 342 0
4 RX J1709.5-2639 LXB 17 09 34 -26 39.9           ~ 113 0
5 NGC 6293 GlC 17 10 10.42 -26 34 54.2   9.96 9.02     ~ 259 0
6 KS 1731-260 LXB 17 34 13.46 -26 05 18.6       22.8 20.9 ~ 405 0
7 V* V4580 Sgr LXB 18 08 27.54 -36 58 44.3   16.81 16.51     ~ 926 0
8 V* V4722 Sgr LXB 18 10 44.47 -26 09 01.2   21.5       ~ 86 0
9 X Aql X-1 LXB 19 11 16.0571313336 +00 35 05.868232692           ~ 1080 1
10 V* LZ Aqr LXB 21 23 14.54 -05 47 52.9 15.90 16.78 16.8     ~ 144 0

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2022.08.09-03:10:13

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