Observation of variable pre-eclipse dips and disk winds in the eclipsing LMXB XTE J1710-281

Abstract

We report the first detection of highly ionized Fe species in the X-ray spectrum of the eclipsing and dipping Low Mass X-ray Binary XTE J1710-281. Using archival Chandra and Suzaku observations, we have carried out a spectro-timing analysis of the source during three different epochs. We compare the average orbital profile and obtain differences in pre-eclipse dip morphologies between different observation epochs. We observe an orbit to orbit evolution of the dips for the first time in this source in both the Chandra observations, reflecting changes in the structure of the accretion disc in timescales of hours. We further perform intensity resolved spectroscopy for both the Chandra and the Suzaku data to characterize the changes in the spectral parameters from the persistent to the dipping intervals. We find that the absorbers responsible for the dips, can be best described using a partially ionized partial covering absorber, with an ionization parameter, log($\xi$) of $\sim$2. The photon index of the source remained at $\sim$2 during both the Chandra and the Suzaku observations. In the 0.6-9 keV Suzaku spectra, we detect a broad 0.72 keV Fe L-alpha emission line complex and two narrow absorption lines at $\sim$6.60 keV and $\sim$7.01 keV. The highly ionized Fe line signatures, being an indicator of accretion disc-winds, has been observed for the first time in XTE J1710-281.

Accepted for publication in MNRAS

References in corpus (13)

• On why the Iron K-shell absorption in AGN is not a signature of the local Warm/Hot Intergalactic Medium
• Accretion disc atmospheres and winds in low-mass X-ray binaries
• A connection between accretion state and $\text{Fe K absorption}$ in an accreting neutron star: black hole-like soft state winds?
• Eclipse Timings of the Transient Low Mass X-ray Binary EXO0748-676. IV. The Rossi X-Ray Timing Explorer Eclipses
• On the Fe K absorption - accretion state connection in the Galactic center neutron star X-ray binary AX J1745.6-2901
• Chandra X-ray spectroscopy of a clear dip in GX 13+1
• Variations in the dip properties of the low-mass X-ray binary XB 1254-69 observed with XMM-Newton and INTEGRAL
• Parameterization studies of the properties of the X-ray dips for Low Mass X-ray binary X1916-053
• Intermittent dipping in a low-mass X-ray Binary
• IGR J17451-3022: a dipping and eclipsing low mass X-ray binary
• Measuring the orbital periods of low mass X-ray binaries in the X-ray band
• XMM-Newton view of the double-peaked Fe K-alpha complex in E1821+643
• X-ray and optical orbital modulation of EXO 0748-676: A co-variability study using XMM-Newton

Cited by in corpus (9)

• Dynamical confirmation of a stellar-mass black hole in the transient X-ray dipping binary MAXI J1305-704
• Delimiting the black hole mass in the X-ray transient MAXI J1659-152 with H$\alpha$ spectroscopy
• Investigation of X-ray timing and spectral properties of ESO 243-49 HLX-1 with long-term Swift Monitoring
• Spectral properties of MXB 1658-298 in the low/hard and high/soft state
• Broad-band spectral analysis of LMXB XTE J1710-281 with Suzaku
• Eclipse Timings of the LMXB XTE J1710-281 : Discovery of a third orbital period glitch
• A Spectroscopic Angle on Central Engine Size Scales in Accreting Neutron Stars
• Accretion disc winds in X-ray binaries
• The puzzling orbital residuals of XTE J1710-281: is a Jovian planet orbiting around the binary system?