2022MNRAS.510.4639L

Query : 2022MNRAS.510.4639L

2022MNRAS.510.4639L - Mon. Not. R. Astron. Soc., 510, 4639-4644 (2022/March-1)

Sensitivity studies on the thermal beta+decay and thermal neutrino loss rates in the multizone X-ray burst model MESA.

LAU R.

Abstract (from CDS):

Recently, it has been discovered that the beta+decay rates and neutrino loss rates of 64Ga and 68Se greatly affect the light curves and final abundances of X-ray bursts in a one-zone model in all circumstances. Here we further expand the study to the multizone model MESA and compare the results with observations of the bursting source GS 1826-24. It was found that the light curve of the modified beta decay rates of 64Ga is more comparable to observations than the standard beta decays. The final mass fractions of the ashes of the X-ray bursts for elements with a mass number of 38 (38Ar, 38Ca) are greatly modified because of the beta+decay rate and neutrino loss rate of 68Se. They also produce more URCA nuclei, which may lead to stronger cooling in the neutron star crusts. Both the modified rates of 68Se and 64Ga make the recurrence times of the simulated X-ray bursts longer because they cause more energy loss than the standard rates and more time is needed to accumulate energy to trigger the bursts.

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): stars: neutron - X-rays: binaries

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* V4634 Sgr LXB 18 29 28.8 -23 47 48 18.90 19.40 19     ~ 399 0

Query : 2022MNRAS.510.4639L

Basic data :
V* V4634 Sgr -- Low Mass X-ray Binary
Other object types: otypes_help 		X (2022MNRAS,Ginga,...), LXB (2013ApJS), V* (NSV,V*), gam (INTEGRAL1,INTREF), N* (2014MNRAS), N*? (2007ApJS)
ICRS coord. (ep=J2000) : 		18 29 28.8 -23 47 48 (X-ray) [ 5000 5000 90 ] D 2022A&A...661A..38P
FK4 coord. (ep=B1950 eq=1950) : 		18 26 25.7 -23 49 50 [ 5000 5000 90 ]
Gal coord. (ep=J2000) : 		009.2736 -06.0896 [ 5000 5000 90 ]
Fluxes (3) :
U 18.90 [~] D 2007A&A...469..807L
B 19.40 [~] D 2007A&A...469..807L
V 19 [~] D 2007A&A...469..807L
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Identifiers (14) :
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NSV 24453 INTREF 912 SRGA J182928.8-234748 V* V4634 Sgr
Ginga 1826-238 PBC J1829.4-2347 SWIFT J1829.4-2346 [KRL2007b] 322
Ginga 1826-24 RX J1829.4-2347 SWIFT J1829.5-2347
INTEGRAL1 92 1RXS J182928.2-234743 4U 1826-24

References (399 between 1850 and 2026) (Total 399)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Distance : 1   

   

Observing logs
XMM : 3   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : V* V4634 Sgr

Link by name to the catalogue in VizieR :

NSV 24453 1RXS J182928.2-234743 V* V4634 Sgr

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