Losing a minute every two years: SRG X-ray view of the rapidly accelerating X-ray pulsar SXP 1323

被引：5

作者：

Mereminskiy, I. A. ^{[1
]}

Mushtukov, A. A. ^{[1
,2
]}

Lutovinov, A. A. ^{[1
]}

Tsygankov, S. S. ^{[1
,3
]}

Semena, A. N. ^{[1
]}

Molkov, S., V ^{[1
]}

Shtykovsky, A. E. ^{[1
]}

机构：

[1] Russian Acad Sci, Space Res Inst, Profsoyuznaya 84-32, Moscow 117997, Russia

[2] Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands

[3] Univ Turku, Dept Phys & Astron, Turku 20014, Finland

来源：

ASTRONOMY & ASTROPHYSICS | 2022年 / 661卷

关键词：

X-rays; binaries; accretion; accretion disks; magnetic fields; individuals; SXP1323; stars; neutron; pulsars; general; SMALL-MAGELLANIC-CLOUD; SUPERNOVA REMNANT; DISK ACCRETION; SPIN-UP; DISCOVERY; PERIOD; LUMINOSITY; BINARIES; CATALOG; PULSATIONS;

D O I：

10.1051/0004-6361/202141813

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The source SXP 1323 is a peculiar high-mass X-ray binary located in the Small Magellanic Cloud. It is renowned for its rapid spin-up. We investigate for the first time broadband X-ray properties of SXP 1323 as observed by the Mikhail Pavlinsky ART-XC and eROSITA telescopes on board the Spectrum-Roentgen-Gamma observatory. Using ART-XC and eROSITA data, we produced a first broadband 1-20 keV X-ray spectrum and estimated the pulsed fraction box 8 keV. With the addition of archival XMM-Newton observations, we traced the evolution of the spin period of SXP 1323 over the last five years and found that after 2016, the source switched to a linear spin-up with a rate of -29.9 s yr(-1). The broadband X-ray spectrum is typical for accreting X-ray pulsars. It has a steep power-law index (Gamma = -0.15) and an exponential cutoff energy of 5.1 keV. No significant difference between spectra obtained in states with and without pulsations were found.

引用

页数：5

共 52 条

[1]

Arnaud KA, 1996, ASTR SOC P, V101, P17

[2] LIMITING LUMINOSITY OF ACCRETING NEUTRON STARS WITH MAGNETIC-FIELDS [J].

BASKO, MM ;

SUNYAEV, RA .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1976, 175 (02) :395-417

[3] On Timing and Spectral Characteristics of the X-ray Pulsar 4U 0115+63: Evolution of the Pulsation Period and the Cyclotron Line Energy [J].

Boldin, P. A. ;

Tsygankov, S. S. ;

Lutovinov, A. A. .

ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS, 2013, 39 (06) :375-388

[4] The eROSITA Final Equatorial Depth Survey (eFEDS) X-ray catalogue [J].

Brunner, H. ;

Liu, T. ;

Lamer, G. ;

Georgakakis, A. ;

Merloni, A. ;

Brusa, M. ;

Bulbul, E. ;

Dennerl, K. ;

Friedrich, S. ;

Liu, A. ;

Maitra, C. ;

Nandra, K. ;

Ramos-Ceja, M. E. ;

Sanders, J. S. ;

Stewart, I. M. ;

Boller, T. ;

Buchner, J. ;

Clerc, N. ;

Comparat, J. ;

Dwelly, T. ;

Eckert, D. ;

Finoguenov, A. ;

Freyberg, M. ;

Ghirardini, V ;

Gueguen, A. ;

Haberl, F. ;

Kreykenbohm, I ;

Krumpe, M. ;

Osterhage, S. ;

Pacaud, F. ;

Predehl, P. ;

Reiprich, T. H. ;

Robrade, J. ;

Salvato, M. ;

Santangelo, A. ;

Schrabback, T. ;

Schwope, A. ;

Wilms, J. .

ASTRONOMY & ASTROPHYSICS, 2022, 661

[5] Discovery of pulsations from NGC300 ULX1 and its fast period evolution [J].

Carpano, S. ;

Haberl, F. ;

Maitra, C. ;

Vasilopoulos, G. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2018, 476 (01) :L45-L49

[6] Discovery of a 26.2 day period in the long-term X-ray light curve of SXP 1323: a very short orbital period for a long spin period pulsar [J].

Carpano, S. ;

Haberl, F. ;

Sturm, R. .

ASTRONOMY & ASTROPHYSICS, 2017, 602

[7] Not an oxymoron: some X-ray binary pulsars with enormous spin-up rates reveal weak magnetic fields [J].

Christodoulou, D. M. ;

Laycock, S. G. T. ;

Kazanas, D. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2018, 478 (03) :3506-3512

[8] Magnetic fields of accreting X-ray pulsars with the Rossi X-ray Timing Explorer [J].

Coburn, W ;

Heindl, WA ;

Rothschild, RE ;

Gruber, DE ;

Kreykenbohm, I ;

Wilms, J ;

Kretschmar, P ;

Staubert, R .

ASTROPHYSICAL JOURNAL, 2002, 580 (01) :394-412

[9] THE 3 TYPES OF HIGH-MASS X-RAY PULSATOR [J].

CORBET, RHD .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1986, 220 (04) :1047-1056

[10] Magellanic cloud X-ray sources observed with ROSAT [J].

Cowley, AP ;

Schmidtke, PC ;

McGrath, TK ;

Ponder, AL ;

Fertig, MR ;

Hutchings, JB ;

Crampton, D .

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 1997, 109 (731) :21-38

← 1 2 3 4 5 6 →