2022A&A...661A..45T


Query : 2022A&A...661A..45T

2022A&A...661A..45T - Astronomy and Astrophysics, volume 661A, 45-45 (2022/5-1)

SRG/ART-XC, Swift, NICER, and NuSTAR study of different states of the transient X-ray pulsar MAXI J0903-531.

TSYGANKOV S.S., MOLKOV S.V., DOROSHENKO V., MUSHTUKOV A.A., MEREMINSKIY I.A., SEMENA A.N., THALHAMMER P., WILMS J. and LUTOVINOV A.A.

Abstract (from CDS):

The results of the broadband spectral and timing study of the recently discovered transient X-ray pulsar MAXI J0903-531 in a wide range of luminosities that differ by a factor of ∼30 are reported. The observed X-ray spectrum in both states can be described as a classical pulsar-like spectrum consisting of a power law with a high-energy cutoff. We argue that the absence of the spectrum transformation to the two-hump structure that is expected at low fluxes indicates that the magnetic field of the neutron star is relatively weak below (2-3) x 1012 G. This estimate is consistent with other indirect constraints and non-detection of any absorption features that might be interpreted as a cyclotron absorption line. The timing analysis of the NuSTAR data revealed only slight variations of a single-peaked pulse profile of the source as a function of the energy band and mass accretion rate. In both intensity states, the pulsed fraction increases from 40% to roughly 80% with the energy. Finally, we were also able to obtain the orbital solution for the binary system using data from the Fermi/GBM, NICER, and NuSTAR instruments.

Abstract Copyright: © ESO 2022

Journal keyword(s): accretion, accretion disks - magnetic fields - X-rays: binaries - stars: neutron - pulsars: individual: MAXI J0903-531 - radiative transfer

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 V* X Per HXB 03 55 23.0777456088 +31 02 45.039836148 6.090 6.840 6.720     O9.5III 940 0
2 HD 245770 HXB 05 38 54.5748918624 +26 18 56.836952784 9.30 9.84 9.39 8.77 8.30 O9/B0III/Ve 927 0
3 NAME SGR 0755-2933 HXB 07 55 32.0 -29 33 08           ~ 7 0
4 MAXI J0903-531 XB* 09 05 06.8206433269 -53 30 19.523474160           B1.5-2III-Ve 10 0
5 GRO J1008-571 HXB 10 09 46.9642314696 -58 17 35.603851848       14.63   B0e 204 0
6 2MASS J12440380-6322320 IR 12 44 03.80856 -63 22 32.0592           ~ 5 0
7 V* V850 Cen HXB 13 01 17.0968941216 -61 36 06.637549788   15.6 14.40     B2Vne 302 0

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2022.08.09-15:32:06

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