The Symbiotic X-ray Binary IGR J16194-2810: A Window on the Future Evolution of Wide Neutron Star Binaries From Gaia

Abstract

We present optical follow-up of IGR J16194-2810, a hard X-ray source discovered by the INTEGRAL mission. The optical counterpart is a $\sim 500L_{\odot }$ red giant at a distance of $2.1$ kpc. We measured 17 radial velocities (RVs) of the giant over a period of $271$ days. Fitting these RVs with a Keplerian model, we find an orbital period of $P_{\mathrm{orb}}=192.73\pm 0.01$ days and a companion mass function $f(M_2)=0.365\pm 0.003M_{\odot }$. We detect ellipsoidal variability with the same period in optical light curves from the ASAS-SN survey. Joint fitting of the RVs, light curves, and the broadband SED allows us to robustly constrain the masses of both components. We find a giant mass of $M_{\star }=0.99_{-0.03}^{+0.02}{M}_{\odot }$ and a companion mass of $M_2=1.23_{-0.03}^{+0.05}{M}_{\odot }$, implying that the companion is a neutron star (NS). We recover a $4.06$-hour period in the system's TESS light curve, which we tentatively associate with the NS spin period. The giant does not yet fill its Roche lobe, suggesting that current mass transfer is primarily via winds. MESA evolutionary models predict that the giant will overflow its Roche lobe in $5$-$10$ Myr, eventually forming a recycled pulsar + white dwarf binary with a $\sim 900$ day period. IGR J16194-2810 provides a window on the future evolution of wide NS + main sequence binaries recently discovered via Gaia astrometry. As with those systems, the binary's formation history is uncertain. Before the formation of the NS, it likely survived a common envelope episode with a donor-to-accretor mass ratio $\gtrsim 10$ and emerged in a wide orbit. The NS likely formed with a weak kick ($v_{\mathrm{kick}}\lesssim 50\mathrm{km}{\mathrm{s}}^{-1}$), as stronger kicks would have disrupted the orbit.

arXiv comment21 pages, 13 figures, Accepted to PASP

References in corpus (58)

• Astropy: A Community Python Package for Astronomy
• emcee: The MCMC Hammer
• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• Modules for Experiments in Stellar Astrophysics (MESA)
• Gaia Data Release 3: Summary of the content and survey properties
• The Transiting Exoplanet Survey Satellite
• Modules for Experiments in Stellar Astrophysics (MESA): Giant Planets, Oscillations, Rotation, and Massive Stars
• Modules for Experiments in Stellar Astrophysics (MESA): Binaries, Pulsations, and Explosions
• MESA Isochrones and Stellar Tracks (MIST). I: Solar-Scaled Models
• The Galaxy Evolution Explorer: A Space Ultraviolet Survey Mission
• Modules for Experiments in Stellar Astrophysics (MESA): Convective Boundaries, Element Diffusion, and Massive Star Explosions
• Estimating distances from parallaxes. V: Geometric and photogeometric distances to 1.47 billion stars in Gaia Early Data Release 3
• The Man Behind the Curtain: X-rays Drive the UV through NIR Variability in the 2013 AGN Outburst in NGC 2617
• Modules for Experiments in Stellar Astrophysics (MESA): Pulsating Variable Stars, Rotation, Convective Boundaries, and Energy Conservation
• galpy: A Python Library for Galactic Dynamics
• A statistical study of 233 pulsar proper motions
• A 3D Dust Map Based on Gaia, Pan-STARRS 1 and 2MASS
• The All-Sky Automated Survey for Supernovae (ASAS-SN) Light Curve Server v1.0
• Gaia Early Data Release 3: Parallax bias versus magnitude, colour, and position
• The GALAH Survey: Scientific Motivation
• Gaia Early Data Release 3: Photometric content and validation
• A standard stellar library for evolutionary synthesis: I. Calibration of theoretical spectra
• Optimal Techniques in Two-dimensional Spectroscopy: Background Subtraction for the 21st Century
• Chemical Cartography with APOGEE: Metallicity Distribution Functions and the Chemical Structure of the Milky Way Disk
• The GALAH+ Survey: Third Data Release
• Modules for Experiments in Stellar Astrophysics (MESA): Time-Dependent Convection, Energy Conservation, Automatic Differentiation, and Infrastructure
• A standard stellar library for evolutionary synthesis: II. The M dwarf extension
• The SRG/eROSITA all-sky survey: First X-ray catalogues and data release of the western Galactic hemisphere
• CERES: A Set of Automated Routines for Echelle Spectra
• The Evolution of Early-Type Galaxies in Distant Clusters II: Internal Kinematics of 55 Galaxies in the z=0.33 Cluster CL1358+62
• A Sun-like star orbiting a black hole
• The influence of atomic diffusion on stellar ages and chemical tagging
• A red giant orbiting a black hole
• A New Stellar Atmosphere Grid and Comparisons with HST/STIS Calspec Flux Distributions
• Robust Data-driven Metallicities for 175 Million Stars from Gaia XP Spectra
• The ROSAT All-Sky Survey Bright Source Catalogue
• Discovery of a dormant 33 solar-mass black hole in pre-release Gaia astrometry
• Tidal Synchronization and Differential Rotation of Kepler Eclipsing Binaries
• A non-interacting Galactic black hole candidate in a binary system with a main-sequence star
• IGR J16194-2810: a new symbiotic X-ray binary
• Infrared Spectroscopy of Symbiotic Stars. IV. V2116 Ophiuchi/GX 1+4, The Neutron Star Symbiotic
• X-ray and optical monitoring of the peculiar source 4U 1700+24/V934 Her
• Wind-accreting Symbiotic X-ray Binaries
• Evidence that the Hot Jupiter WASP-77 A b Formed Beyond Its Parent Protoplanetary Disk's H2O Ice Line
• The All Sky Automated Survey. Variable Stars in the 0h - 6h Quarter of the Southern Hemisphere
• Chandra localisation and optical/NIR follow-up of Galactic X-ray sources
• Search for Dormant Black Holes in Ellipsoidal Variables I. Revisiting the Expected Amplitudes of the Photometric Modulation
• The M Supergiant High Mass X-Ray Binary 4U 1954+31
• Infrared Spectroscopy of Symbiotic Stars. XII. The Neutron Star SyXB System 4U 1700+24 = V934 Herculis
• A Simple Code for Rotational Broadening of Broad Wavelength Range High-Dispersion Spectra
• IGR J17329-2731: The birth of a symbiotic X-ray binary
• A $1.9M_{\odot }$ neutron star candidate in a 2-year orbit
• SRGA J181414.6-225604: A new Galactic symbiotic X-ray binary outburst triggered by an intense mass loss episode of a heavily obscured Mira variable
• K2 & TESS observations of symbiotic X-ray binaries: GX 1+4 and IGR J16194-2810
• Suzaku Observation of the Symbiotic X-Ray Binary IGR J16194-2810
• A massive AGB donor in Scutum X-1: Identification of the first Mira variable in an X-ray binary
• Spectroscopic analysis of cool giants and supergiants

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