NICER X-Ray Observations of Seven Nearby Rotation-powered Millisecond Pulsars

被引：50

作者：

Guillot, Sebastien ^{[1
,2
]}

Kerr, Matthew ^{[3
]}

Ray, Paul S. ^{[3
]}

Bogdanov, Slavko ^{[4
]}

Ransom, Scott ^{[5
]}

Deneva, Julia S. ^{[6
]}

Arzoumanian, Zaven ^{[7
]}

Bult, Peter ^{[7
]}

Chakrabarty, Deepto ^{[8
]}

Gendreau, Keith C. ^{[7
]}

Ho, Wynn C. G. ^{[9
,10
,11
]}

Jaisawal, Gaurava K. ^{[12
]}

Malacaria, Christian ^{[13
,14
]}

Miller, M. Coleman ^{[15
,16
]}

Strohmayer, Tod E. ^{[7
,17
]}

Wolff, Michael T. ^{[3
]}

Wood, Kent S. ^{[18
]}

Webb, Natalie A. ^{[1
,2
]}

Guillemot, Lucas ^{[19
,20
]}

Cognard, Ismael ^{[19
,20
]}

Theureau, Gilles ^{[19
,20
,21
]}

机构：

[1] CNRS, IRAP, 9 Ave Colonel Roche,BP 44346, F-31028 Toulouse 4, France

[2] Univ Toulouse, CNES, UPS OMP, F-31028 Toulouse, France

[3] Naval Res Lab, Div Space Sci, Washington, DC 20375 USA

[4] Columbia Univ, Columbia Astrophys Lab, 550 West 120th St, New York, NY 10027 USA

[5] Natl Radio Astron Observ, 520 Edgemont Rd, Charlottesville, VA 22903 USA

[6] George Mason Univ, Naval Res Lab, Washington, DC 20375 USA

[7] NASA, Goddard Space Flight Ctr, Astrophys Sci Div, Greenbelt, MD 20771 USA

[8] MIT, Kavli Inst Astrophys & Space Res, 70 Vassar St, Cambridge, MA 02139 USA

[9] Haverford Coll, Dept Phys & Astron, 370 Lancaster Ave, Haverford, PA 19041 USA

[10] Univ Southampton, Math Sci Phys & Astron, Southampton SO17 1BJ, Hants, England

[11] Univ Southampton, STAG Res Ctr, Southampton SO17 1BJ, Hants, England

[12] Tech Univ Denmark, Natl Space Inst, Elektrovej 327-328, DK-2800 Lyngby, Denmark

[13] NASA, Marshall Space Flight Ctr, NSSTC, 320 Sparkman Dr, Huntsville, AL 35805 USA

[14] Univ Space Res Assoc, NSSTC, 320 Sparkman Dr, Huntsville, AL 35805 USA

[15] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

[16] Univ Maryland, Joint Space Sci Inst, College Pk, MD 20742 USA

[17] NASA, Goddard Space Flight Ctr, Joint Space Sci Inst, Greenbelt, MD 20771 USA

[18] Naval Res Lab, Washington, DC 20375 USA

[19] Univ Orleans, CNRS, Lab Phys & Chim Environm & Espace, LPC2E, F-45071 Orleans, France

[20] CNRS, Observ Paris, Stn Radioastron Nancay, INSU, F-18330 Nancay, France

[21] Univ Paris Diderot, PSL Res Univ, CNRS, LUTH,Observ Paris,Sorbonne Paris Cite, F-92195 Meudon, France

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2019年 / 887卷 / 01期

关键词：

EQUATION-OF-STATE; XMM-NEWTON OBSERVATIONS; NEUTRON-STAR; OPTICAL OBSERVATIONS; TIMING OBSERVATIONS; DENSE MATTER; EMISSION; MASS; RADIATION; CHANDRA;

D O I：

10.3847/2041-8213/ab511b

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Neutron star Interior Composition Explorer observed several rotation-powered millisecond pulsars (MSPs) to search for or confirm the presence of X-ray pulsations. When broad and sine-like, these pulsations may indicate thermal emission from hot polar caps at the magnetic poles on the neutron star surface. We report confident detections (>= 4.7 sigma after background filtering) of X-ray pulsations for five of the seven pulsars in our target sample: PSR J0614-3329, PSR J0636+5129, PSR J0751+1807, PSR J1012+5307, and PSR J2241-5236, while PSR J1552+5437 and PSR J1744-1134 remain undetected. Of those, only PSR J0751+1807 and PSR J1012+5307 had pulsations previously detected at the 1.7 sigma and almost 3 sigma confidence levels, respectively, in XMM-Newton data. All detected sources exhibit broad sine-like pulses, which are indicative of surface thermal radiation. As such, these MSPs are promising targets for future X-ray observations aimed at constraining the neutron star mass-radius relation and the dense matter equation of state using detailed pulse profile modeling. Furthermore, we find that three of the detected MSPs exhibit a significant phase offset between their X-ray and radio pulses.

引用

页数：15

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