The broad band X-ray/hard X-ray spectra of accreting neutron stars

Abstract

I review the energy spectra of low mass X-ray binaries (LMXBs) containing weakly magnetized accreting neutron stars (NS), emphasizing the most recent broad band (0.1-200 keV) spectral and timing observations performed by Beppo-SAX and RXTE. Drawing on the similarities between black hole candidate (BHC) and NS accretion, I discuss the accretion geometry and emission processes of NS LMXBs.

15 pages, 17 figures, Invited review at the 33rd COSPAR Scientific Assembly, Warsaw, Poland, July, 2000. Accepted for publication in Advances in Space Research. The paper is also available from http://www.cesr.fr/~barret/

Cited by in corpus (82)

• Evaluating Spectral Models and the X-ray States of Neutron-Star X-ray Transients
• Relativistic Lines and Reflection from the Inner Accretion Disks Around Neutron Stars
• Black hole-like hysteresis and accretion states in neutron star low mass X-ray binaries
• Physics of accretion in the millisecond pulsar XTE J1751-305
• Average hard X-ray emission from NS LMXBs: Observational evidence of different spectral states in NS LMXBs
• ULX spectra revisited: Accreting, highly magnetized neutron stars as the engines of ultraluminous X-ray sources
• Accretion disks and coronae in the X-ray flashlight
• A peculiar spectral state transition of 4U1705--44: when an Atoll looks like a Z
• A new Comptonization model for low-magnetized accreting neutron stars in low mass X-ray binaries
• Identification of black hole power spectral components across all canonical states
• The Central Engines of 19 LINERs as Viewed by Chandra
• A physical interpretation of the variability power spectral components in accreting neutron stars
• A Deep Chandra ACIS Survey of M83
• Spectral variability in Cygnus X-3
• On the Fe K absorption - accretion state connection in the Galactic center neutron star X-ray binary AX J1745.6-2901
• The Burst and Transient Source Experiment (BATSE) Earth Occultation Catalog of Low-Energy Gamma-Ray Sources
• An XMM Observation of IGR J16320-4751=AX J1631.9-4752
• A dichotomy between the hard state spectral properties of black hole and neutron star X-ray~binaries
• A broad iron line in the Chandra/HETG spectrum of 4U 1705-44
• Quadrupole moment of a magnetically confined mountain on an accreting neutron star: effect of the equation of state
• X-ray polarimetry and spectroscopy of the neutron star low-mass X-ray binary GX 9+9: an in-depth study with IXPE and NuSTAR
• Suzaku and BeppoSAX X-ray Spectra of the Persistently Accreting Neutron-Star Binary 4U 1705-44
• INTEGRAL detection of a long powerful burst from SLX1735-269
• Spectral and Timing Properties of Atoll Source 4U 1705-44 : LAXPC/AstroSat Results
• A Soft X-Ray Spectral Episode for the Clocked Burster, GS 1826-24 as Measured by Swift and NuSTAR
• Burst-properties as a function of mass accretion rate in GX 3+1
• The discovery outburst of the X-ray transient IGR J17497-2821 observed with RXTE and ATCA
• Unveiling the Nature of the High Energy Source IGR J19140+0951
• XMM-Newton study of the persistent X-ray source 1E1743.1-2843 located in the Galactic Center direction
• Relativistic X-Ray Reflection and Photoionised Absorption in the Neutron-Star Low-Mass X-ray Binary GX 13+1
• NuSTAR + XMM-Newton monitoring of the neutron star transient AX J1745.6-2901
• The X-ray spectral evolution of Cyg X-2 in the framework of bulk Comptonization
• Super-Orbital Variability in Hard X-rays
• Suzaku spectroscopy of the neutron star transient 4U 1608-52 during its outburst decay
• Suzaku Studies of Luminosity-Dependent Changes in the Low-Mass X-ray Binary Aquila X-1
• A test of the nature of the Fe K Line in the neutron star low-mass X-ray binary Serpens X-1
• Comparing the Accretion Disk Evolution of Black Hole and Neutron Star X-ray Binaries from Low to Super-Eddington Luminosity
• The first detection of Compton Reflection in the Low-Mass X-ray Binary 4U1705-44 with INTEGRAL and BeppoSAX
• The chemical composition of the accretion disk and donor star in Ultra Compact X-ray Binaries: A comprehensive X-ray analysis
• Simultaneous BeppoSAX and Rossi X-ray Timing Explorer observations of 4U1812-12
• The hard X-ray tails in neutron star low mass X-ray binaries: BeppoSAX observations and possible theoretical explanation of the GX 17+2 case
• Boundary layer emission in luminous LMXBs
• Simplified Picture of Low Mass X-ray Binaries based on Data from Aql X-1 and 4U1608-52
• Constraining the size of the Comptonizing medium by modeling the energy dependent time-lags of kHz QPOs of Neutron star system
• Correlations between X-ray Spectral and Timing Characteristics in Cyg X-2
• INTEGRAL observations of the Be/X-ray binary EXO 2030+375 during outburst
• Discovery of a new INTEGRAL source: IGR J19140+0951
• Mixed H/He bursts in SAX J1748.9-2021 during the spectral change of its 2015 outburst
• Relation between spectral changes and the presence of the lower kHz QPO in the neutron-star low-mass X-ray binary 4U 1636-53
• AstroSat/LAXPC view of GX 17+2: Spectral Evolution along the Z-track
• Slow and Fast Transitions in the Rising Phase of Outbursts from NS-LMXB transients, AqlX-1 and 4U1608-52
• Constraining the Coronal Heights and Readjustment Velocities Based on the Detection of a Few Hundred Seconds Delays in the Z Source GX 17+2
• Spectral evolution of bright NS LMXBs with INTEGRAL: an application of the thermal plus bulk Comptonization model
• Discovery of the new X-ray transient MAXI J1807+132: a Candidate of a Neutron Star Low-mass X-ray binary
• Broadband Spectral Analysis of Aql X-1
• The impact of neutron star spin on X-ray spectra
• Broadband X-ray emission and the reality of the broad iron line from the Neutron Star - White Dwarf X-ray binary 4U 1820-30
• The amplitude of the kilohertz quasi-periodic oscillations in 4U 1636$-$53 in the frequency-energy space
• Observing imprints of black hole event horizon on X-ray spectra
• INTEGRAL high energy monitoring of the X-ray burster KS 1741-293
• The ultra-compact binary 4U1850-087 observed with INTEGRAL: hard X-ray emission from an X-ray burster
• The very faint hard state of the persistent neutron star X-ray binary SLX 1737-282 near the Galactic centre
• SAXJ1712.6-3739: a persistent hard X-ray source as monitored with INTEGRAL
• Disappearance of the Fe K$\alpha$ emission line in Ultra Compact X-ray Binaries 4U 1543-624 and Swift J1756.9-2508
• Monte Carlo Simulations of Thermal Comptonization Process in a Two Component Advective Flow around a Neutron Star
• Decades' long-term variations in NS-LMXBs observed with MAXI/GSC, RXTE/ASM and Ginga/ASM
• Investigating the nature and properties of MAXI J1810-222 with radio and X-ray observations
• A Monte Carlo estimate for the fraction of thermal Comptonized photons that impinge back on the soft source in neutron star LMXBs
• AstroSat view of `Clocked` burster GS 1826-238:broad-band spectral nature of persistent and burst emission during soft state
• Swift monitoring of Cygnus X-2: investigating the NUV-X-ray connection
• Suzaku Observation of the Symbiotic X-Ray Binary IGR J16194-2810
• Correlated spectro-polarimetric study along the Z track in XTE J1701-462 puts constraints on its coronal geometry
• Probing spectral and temporal evolution of the neutron star low-mass X-ray binary 4U 1724-30 with AstroSat
• Hard-tail emission in the soft state of low-mass X-ray binaries and their relation to the neutron star magnetic field
• Timing Properties of Shocked Accretion Flows around Neutron Stars in Presence of Cooling
• Investigating the coronal structure by studying time lags in the Atoll source 4U 1705-44 using AstroSat
• Study on the energy limits of kHz QPOs in Sco X-1 with $RXTE$ and $Insight$-HXMT observations
• Timing and spectral study of XB 1254-690 using new RXTE PCA data
• An enigmatic hump around 30 keV in Suzaku spectra of Aquila X-1 in the Hard State
• Spectral study of neutron star low mass X-ray binary source 1A 1744-361
• AstroSat View of Transient Low-mass X-ray Binary XTE J1701-462: Spectral and Temporal Evolution along the Z-track
• Generalized Flows around Neutron Stars