Timing and noise analysis of five millisecond pulsars observed with MeerKAT

被引：0

作者：

Chisabi, M. ^{[1
]}

Andrianomena, S. ^{[2
,3
]}

Enwelum, U. ^{[4
]}

Gasennelwe, E. G. ^{[5
]}

Idris, A.

Idogbe, E. A. ^{[6
]}

Shilunga, S. ^{[7
]}

Geyer, M. ^{[2
,8
]}

Reardon, D. J. ^{[9
,10
]}

Okany, C. F. ^{[6
,11
]}

Shamohammadi, M. ^{[9
,10
]}

Shannon, R. M. ^{[9
,10
]}

Krishnan, V. Venkatraman ^{[12
]}

Abbate, F. ^{[12
,13
]}

Kramer, M.

机构：

[1] Copperbelt Univ, Dept Phys, Jambo Dr, Riverside, Kitwe, Zambia

[2] South African Radio Astron Observ, Liesbeek House,River Pk Liesbeek Pkwy,Settlers Way, ZA-7705 Mowbray, South Africa

[3] Univ Western Cape, Dept Phys & Astron, ZA-7535 Cape Town, South Africa

[4] Univ Nigeria, Dept Sci Lab Technol, Nsukka 410001, Nigeria

[5] Univ Botswana, Dept Phys, Private Bag UB 0022, Gaborone, Botswana

[6] Natl Space Res & Dev Agcy, Ctr Basic Space Sci, Astron Div, Nsukka, Nigeria

[7] Univ Namibia, Dept Phys Chem & Mat Sci, Private bag 13301, Windhoek 10023, Namibia

[8] Univ Cape Town, Dept Math & Appl Math, High Energy Phys, Cosmol & Astrophys Theory HEPCAT Grp, ZA-7700 Rondebosch, South Africa

[9] Swinburne Univ Technol, Ctr Astrophys & Supercomp, POB 218, Hawthorn, Vic 3122, Australia

[10] Australian Res Council, Ctr Excellence Gravitat Wave Discovery OzGrav, Hawthorn, Vic 3122, Australia

[11] Univ Nigeria, Dept Phys & Astron, Nsukka 410101, Nigeria

[12] Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany

[13] INAF Osservatorio Astron Cagliari, Via Sci 5, I-09047 Selargius, CA, Italy

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2025年 / 537卷 / 03期

基金：

澳大利亚研究理事会; 新加坡国家研究基金会;

关键词：

astrometry; parallaxes; stars: neutron; pulsars: general; EQUATION-OF-STATE; SHAPIRO DELAY; SPIN NOISE; BINARY; MASS; DISCOVERY; CONSTRAINTS; EVOLUTION; MODEL;

D O I：

10.1093/mnras/staf100

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Millisecond pulsars (MSPs) in binary systems are precise laboratories for tests of gravity and the physics of dense matter. Their orbits can show relativistic effects that provide a measurement of the neutron star mass and the pulsars are included in timing array experiments that search for gravitational waves. Neutron star mass measurements are key to eventually solving the neutron star equation of state and these can be obtained by a measure of the Shapiro delay if the orbit is viewed near edge-on. Here, we report on the timing and noise analysis of five MSPs observed with the MeerKAT radio telescope: PSRs J0900-3144, J0921-5202, J1216-6410, J1327-0755, and J1543-5149. We searched for the Shapiro delay in all of the pulsars and obtain weak detections for PSRs J0900-3144, J1216-6410, and J1327-0755. We report a higher significance detection of the Shapiro delay for PSR J1543-5149, giving a precise pulsar mass of M-p = 1.349(-0.061)(+0.043)M(circle dot) and companion white-dwarf mass M-c = 0.223(-0.007)(+0.005) M-circle dot. This is an atypically low-mass measurement for a recycled MSP. In addition to these Shapiro delays, we also obtain timing model parameters including proper motions and parallax constraints for most of the pulsars.

引用

页码：2462 / 2470

页数：9

共 57 条

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