The Radius of PSR J0740+6620 from NICER and XMM-Newton Data
M.C. Miller
,
F.K. Lamb
,
A.J. Dittmann
,
S. Bogdanov
,
Z. Arzoumanian
,
K.C. Gendreau
,
S. Guillot
(1, 2)
,
W.C. G. Ho
,
J.M. Lattimer
,
M. Loewenstein
,
S.M. Morsink
,
P.S. Ray
,
M.T. Wolff
,
C.L. Baker
,
T. Cazeau
,
S. Manthripragada
,
C.B. Markwardt
,
T. Okajima
,
S. Pollard
,
I. Cognard
(3, 4)
,
H.T. Cromartie
,
E. Fonseca
,
L. Guillemot
(3, 4)
,
M. Kerr
,
A. Parthasarathy
,
T.T. Pennucci
,
S. Ransom
,
I. Stairs
M.C. Miller
- Fonction : Auteur
F.K. Lamb
- Fonction : Auteur
A.J. Dittmann
- Fonction : Auteur
S. Bogdanov
- Fonction : Auteur
Z. Arzoumanian
- Fonction : Auteur
K.C. Gendreau
- Fonction : Auteur
W.C. G. Ho
- Fonction : Auteur
J.M. Lattimer
- Fonction : Auteur
M. Loewenstein
- Fonction : Auteur
S.M. Morsink
- Fonction : Auteur
P.S. Ray
- Fonction : Auteur
M.T. Wolff
- Fonction : Auteur
C.L. Baker
- Fonction : Auteur
T. Cazeau
- Fonction : Auteur
S. Manthripragada
- Fonction : Auteur
C.B. Markwardt
- Fonction : Auteur
T. Okajima
- Fonction : Auteur
S. Pollard
- Fonction : Auteur
H.T. Cromartie
- Fonction : Auteur
E. Fonseca
- Fonction : Auteur
M. Kerr
- Fonction : Auteur
A. Parthasarathy
- Fonction : Auteur
T.T. Pennucci
- Fonction : Auteur
S. Ransom
- Fonction : Auteur
I. Stairs
- Fonction : Auteur
Résumé
PSR J0740+6620 has a gravitational mass of 2.08 ± 0.07 M ⊙, which is the highest reliably determined mass of any neutron star. As a result, a measurement of its radius will provide unique insight into the properties of neutron star core matter at high densities. Here we report a radius measurement based on fits of rotating hot spot patterns to Neutron Star Interior Composition Explorer (NICER) and X-ray Multi-Mirror (XMM-Newton) X-ray observations. We find that the equatorial circumferential radius of PSR J0740+6620 is km (68%). We apply our measurement, combined with the previous NICER mass and radius measurement of PSR J0030+0451, the masses of two other ∼2 M ⊙ pulsars, and the tidal deformability constraints from two gravitational wave events, to three different frameworks for equation-of-state modeling, and find consistent results at ∼1.5–5 times nuclear saturation density. For a given framework, when all measurements are included, the radius of a 1.4 M ⊙ neutron star is known to ±4% (68% credibility) and the radius of a 2.08 M ⊙ neutron star is known to ±5%. The full radius range that spans the ±1σ credible intervals of all the radius estimates in the three frameworks is 12.45 ± 0.65 km for a 1.4 M ⊙ neutron star and 12.35 ± 0.75 km for a 2.08 M ⊙ neutron star.
Domaines
Astrophysique [astro-ph] Relativité Générale et Cosmologie Quantique [gr-qc] Physique Nucléaire Expérimentale [nucl-ex] Physique Nucléaire Théorique [nucl-th] Planète et Univers [physics]Format du dépôt | Notice |
---|---|
Type de dépôt | Article dans une revue |
Titre |
en
The Radius of PSR J0740+6620 from NICER and XMM-Newton Data
|
Résumé |
en
PSR J0740+6620 has a gravitational mass of 2.08 ± 0.07 M ⊙, which is the highest reliably determined mass of any neutron star. As a result, a measurement of its radius will provide unique insight into the properties of neutron star core matter at high densities. Here we report a radius measurement based on fits of rotating hot spot patterns to Neutron Star Interior Composition Explorer (NICER) and X-ray Multi-Mirror (XMM-Newton) X-ray observations. We find that the equatorial circumferential radius of PSR J0740+6620 is km (68%). We apply our measurement, combined with the previous NICER mass and radius measurement of PSR J0030+0451, the masses of two other ∼2 M ⊙ pulsars, and the tidal deformability constraints from two gravitational wave events, to three different frameworks for equation-of-state modeling, and find consistent results at ∼1.5–5 times nuclear saturation density. For a given framework, when all measurements are included, the radius of a 1.4 M ⊙ neutron star is known to ±4% (68% credibility) and the radius of a 2.08 M ⊙ neutron star is known to ±5%. The full radius range that spans the ±1σ credible intervals of all the radius estimates in the three frameworks is 12.45 ± 0.65 km for a 1.4 M ⊙ neutron star and 12.35 ± 0.75 km for a 2.08 M ⊙ neutron star.
|
Auteur(s) |
M.C. Miller
, F.K. Lamb
, A.J. Dittmann
, S. Bogdanov
, Z. Arzoumanian
, K.C. Gendreau
, S. Guillot
1, 2
, W.C. G. Ho
, J.M. Lattimer
, M. Loewenstein
, S.M. Morsink
, P.S. Ray
, M.T. Wolff
, C.L. Baker
, T. Cazeau
, S. Manthripragada
, C.B. Markwardt
, T. Okajima
, S. Pollard
, I. Cognard
3, 4
, H.T. Cromartie
, E. Fonseca
, L. Guillemot
3, 4
, M. Kerr
, A. Parthasarathy
, T.T. Pennucci
, S. Ransom
, I. Stairs
1
IRAP -
Institut de recherche en astrophysique et planétologie
( 135748 )
- 9 avenue Colonel Roche 31028 Toulouse
- France
2
CNES -
Centre National d'Études Spatiales [Toulouse]
( 307314 )
- 18 avenue Edouard Belin 31401 Toulouse
- France
3
USN -
Unité Scientifique de la Station de Nançay
( 491 )
- 18330 NANCAY
- France
4
LPC2E -
Laboratoire de Physique et Chimie de l'Environnement et de l'Espace
( 185533 )
- 3A, Avenue de la Recherche Scientifique 45071 Orléans cedex 2
- France
|
Langue du document |
Anglais
|
Vulgarisation |
Non
|
Comité de lecture |
Oui
|
Audience |
Internationale
|
Date de publication |
2021
|
Volume |
918
|
Numéro |
2
|
Page/Identifiant |
L28
|
Nom de la revue |
|
Domaine(s) |
|
arXiv Id | 2105.06979 |
DOI | 10.3847/2041-8213/ac089b |
inSPIRE HEP | 1863305 |
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