The Spin and Orientation of the Black Hole in XTE J1908$+$094

Abstract

NuSTAR observed the black hole candidate XTE J1908$+$094 during its 2013 and 2019 outbursts. We use relativistic reflection to measure the spin of the black hole through 19 different assumptions of relxill flavors and parameter combinations. The most favored model in terms of Deviance Information Criterion (DIC) measures the spin of the black hole to be $a=0.55_{-0.45}^{+0.29}$, and an inclination of $\theta =27_{-3}^{+2}$ degrees ($1\sigma$ statistical errors). We look at the effects of coronal geometry assumptions and density of the accretion disk on the spin prediction. All 19 tested models provide consistent spin estimates. We discuss the evolution of spin measurement techniques using relativistic reflection in X-ray binaries and discuss the implications of this spin measurement in reconciling the distributions of stellar mass black hole spin measurements made through X-ray and gravitational wave observations.

16 pages, 7 figures, 3 tables. Accepted for publication in ApJ

References in corpus (18)

• GWTC-2: Compact Binary Coalescences Observed by LIGO and Virgo During the First Half of the Third Observing Run
• Relativistic X-ray Lines from the Inner Accretion Disks Around Black Holes
• The role of the reflection fraction in constraining black hole spin
• Observational Constraints on Black Hole Spin
• The Masses and Spins of Neutron Stars and Stellar-Mass Black Holes
• Broad iron K-alpha emission lines as a diagnostic of black hole spin
• On the Bardeen-Petterson Effect in black hole accretion discs
• Supernova Fallback as Origin of Neutron Star Spins and Spin-kick Alignment
• Viscous Torque and Dissipation in the Inner Region of a Thin Accretion Disk: Implications for Measuring Black Hole Spin
• You Can't Always Get What You Want: The Impact of Prior Assumptions on Interpreting GW190412
• A New Spin on an Old Black Hole: NuSTAR Spectroscopy of EXO 1846-031
• NuSTAR Observations of the Black Hole GS 1354-645: Evidence of Rapid Black Hole Spin
• Black Hole Spin in X-ray Binaries: Giving Uncertainties an $f$
• NuSTAR low energy effective area correction due to thermal blanket tear
• Studying the Reflection Spectra of the New Black Hole X-ray Binary Candidate MAXI J1631-479 Observed by NuSTAR: A Variable Broad Iron Line Profile
• Accretion induced black hole spin up revised by numerical GR MHD simulations
• Alignment and precession of a black hole misaligned with its accretion disc: Application to Low Mass X-ray Binaries
• Properties of Faint X-ray Activity of XTE J1908+094 in 2019

Cited by in corpus (1)

• A Systematic View of Ten New Black Hole Spins