The Historical X-ray Transient KY TrA in quiescence

Zurita, C.; Corral-Santana, J. M.; Casares, J.

doi:10.1093/mnras/stv2219

Cited by 11 publications

(6 citation statements)

References 18 publications

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“…Employing these values, we estimate the mean value of f (Γ, θ) = 9.74 (Fender 2001). Using the above data along with a range of distance to the source as D = 6 − 11 kpc (Hynes et al 2002;Zurita et al 2002), we estimate the observed kinetic jet power to be L obs jet ∼ 3 − 6 × 10 37 erg s −1 .…”

Section: Spectral Signature Of Disc-jet Connection and Estimation Of ...mentioning

confidence: 98%

Accretion flow dynamics during 1999 outburst of XTE J1859+226—modeling of broadband spectra and constraining the source mass

Nandi

Mandal

Sreehari

et al. 2018

Astrophys Space Sci

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We examine the dynamical behavior of accretion flow around XTE J1859+226 during the 1999 outburst by analyzing the entire outburst data (∼ 166 days) from RXTE Satellite. Towards this, we study the hysteresis behavior in the hardness intensity diagram (HID) based on the broadband (3−150 keV) spectral modeling, spectral signature of jet ejection and the evolution of Quasiperiodic Oscillation (QPO) frequencies using the twocomponent advective flow model around a black hole. We compute the flow parameters, namely Keplerian accretion rate (ṁ d ), sub-Keplerian accretion rate (ṁ h ), shock location (r s ) and black hole mass (M bh ) from the spectral modeling and study their evolution along the q-diagram. Subsequently, the kinetic jet power is computed as L obs jet ∼ 3 − 6 × 10 37 erg s −1 during one of the observed radio flares which indicates that jet power corresponds to 8 − 16% mass outflow rate from the disc. This estimate of mass outflow rate is in close agreement with the change in total accretion rate (∼ 14%) required for spectral modeling before and during the flare. Finally, we provide a mass estimate of the source XTE J1859+226 based on the spectral modeling that lies in the range of 5.2 − 7.9M ⊙ with 90% confidence.

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Section: Spectral Signature Of Disc-jet Connection and Estimation Of ...mentioning

confidence: 98%

Accretion flow dynamics during 1999 outburst of XTE J1859+226—modeling of broadband spectra and constraining the source mass

Nandi

Mandal

Sreehari

et al. 2018

Astrophys Space Sci

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“…This has been used not only as a very efficient way to distinguish among different populations in the Galactic plane (see e.g. Drew et al 2005;Corradi et al 2008Corradi et al , 2010Wevers et al 2016) but also to identify the missing optical counterpart of BH candidates (Zurita et al 2015). Figure 3 shows the uncalibrated (r − Hα) vs (r − i ) diagram of all the stars observed in the detector FoV and detected in all three filters.…”

Section: Hα Emission In Outburstmentioning

confidence: 99%

The long-term optical evolution of the black hole candidate MAXI J1659−152

Corral-Santana

Torres

Shahbaz

et al. 2017

Monthly Notices of the Royal Astronomical Society

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We present 5 years of optical and infrared data of the black hole candidate MAXI J1659−152 covering its 2010 outburst, decay and quiescence. Combining optical data taken during the outburst decay, we obtain an orbital period of 2.414 ± 0.005 h, in perfect agreement with the value previously measured from X-ray dips. In addition, we detect a clear Hα excess in MAXI J1659−152 with data taken during the outburst decay. We also detect a single hump modulation most likely produced by irradiation. Assuming that the maximum occurs at orbital phase 0.5, we constrain the phase of the X-ray dips to be ∼ 0.65. We also detect the quiescent optical counterpart at r = 24.20 ± 0.08, I = 23.32 ± 0.02 and H = 20.7 ± 0.1. These magnitudes provide colour indices implying an M2-M5 donor star assuming 60% contribution from a disc component in the r -band.

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“…They have also derived inclination angle as 68 ± 2 • , which is lower than the value reported by others (for example, Wagner et al, 2001). This may be due to their assumption of negligible non-stellar flux contribution in Near-Infrared band (Wagner et al, 2001, Zurita et al, 2002, Khargharia et al, 2013. Our estimated mass is consistent with the value determined by Wagner et al (2001), McClintock et al (2001a and Khargharia et al (2013).…”

Section: Discussion and Concluding Remarksmentioning

confidence: 99%

Properties of the black hole candidate XTE J1118+480 with the TCAF solution during its jet activity induced 2000 outburst

Chatterjee

Debnath

Jana

et al. 2019

Astrophys Space Sci

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Galactic black hole candidate (BHC) XTE J1118+480 during its 2000 outburst has been studied in a broad energy range using the archival data of PCA and HEXTE payloads of Rossi X-ray Timing Explorer. Detailed spectral and temporal properties of the source are studied. Low and very low frequency quasi-periodic oscillations (QPOs), with a general trend of increasing frequency are observed during the outburst. Spectral analysis is done using the combined data of PCA and HEXTE instruments with two types of models: the well known phenomenological power-law model and the current version of the fits file of two-component advective flow (TCAF) solution as an additive table model in XSPEC. During the entire period of the outburst, a nonthermal power-law component and the TCAF model fitted sub-Keplerian halo rate were found to be highly dominant. We suggest that this so-called outburst is due to enhanced jet activity. Indeed, the 'outburst' subsides when this activity disappears. We estimated X-ray fluxes coming from the base of the jet and found that the radio flux is correlated with this X-ray flux. Though the object was in the hard state in the entire episode, the spectrum becomes slightly softer with the rise in Keplerian disk rate in the late declining phase. We also estimated the probable mass of the source from our spectral analysis with the TCAF solution. Our estimated mass of XTE J1118+480 is 6.99 +0.50 −0.74 M ⊙ i.e., in the range of 6.25 − 7.49 M ⊙ .

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The Historical X-ray Transient KY TrA in quiescence

Cited by 11 publications

References 18 publications

Accretion flow dynamics during 1999 outburst of XTE J1859+226—modeling of broadband spectra and constraining the source mass

Accretion flow dynamics during 1999 outburst of XTE J1859+226—modeling of broadband spectra and constraining the source mass

The long-term optical evolution of the black hole candidate MAXI J1659−152

Properties of the black hole candidate XTE J1118+480 with the TCAF solution during its jet activity induced 2000 outburst

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