Mass constraints to Sco X-1 from Bowen flourescence and deep near-infrared spectroscopy
arXiv:1501.02269 · doi:10.1093/mnrasl/slv002
Abstract
More than 50 years after the dawn of X-ray astronomy, the dynamical parameters of the prototypical X-ray binary Sco X-1 are still unknown. We combine a Monte Carlo analysis, which includes all the previously known orbital parameters of the system, along with the K-correction to set dynamical constraints to the masses of the compact object (M1<1.73 Msun) and the companion star (0.28 Msun<M2<0.70 Msun). For the case of a canonical neutron star mass of M1= 1.4 Msun, the orbital inclination is found to be lower than 40 degree. We also present the best near-infrared spectrum of the source to date. There is no evidence of donor star features on it, but we are able to constrain the veiling factor as a function of the spectral type of the secondary star. The combination of both techniques restricts the spectral type of the donor to be later than K4 and luminosity class IV. It also constrains the contribution of the companion light to the infrared emission of Sco X-1 to be lower than 33 percent. This implies that the accretion related luminosity of the system in the K band is larger than 4 x 10E35 erg/s.
6 pages, 2 figures, accepted for publication in MNRAS Letters
References in corpus (8)
- Shapiro delay measurement of a two solar mass neutron star
- Mass Measurements of Stellar and Intermediate Mass Black-Holes
- Black hole-like hysteresis and accretion states in neutron star low mass X-ray binaries
- On the masses and evolutionary status of the black hole binary GX 339-4. A twin system of XTE J1550-564?
- Detection of the Irradiated Donor in the LMXBs 4U 1636-536 (=V801 Ara) and 4U 1735-444 (=V926 Sco)
- Precision ephemerides for gravitational-wave searches: I. Sco X-1
- Echoes from the companion star in Sco X-1
- A detection of the donor star of Aquila X-1 during its 2004 outburst?
Cited by in corpus (22)
- Evidence for simultaneous jets and disk winds in luminous low-mass X-ray binaries
- X-ray Binaries
- Low Mass X-ray Binaries: The Effects of the Magnetic Braking Prescription
- Swift J1357.2-0933: a massive black hole in the Galactic thick disc
- Evolving LMXBs: CARB Magnetic Braking
- Low-Mass X-ray Binaries
- Near-infrared emission lines trace the state-independent accretion disc wind of the black hole transient MAXI J1820+070
- The donor of Aquila X-1 revealed by high angular resolution near-infrared spectroscopy
- Precision ephemerides for gravitational-wave searches -- III. Revised system parameters of Sco X-1
- Discovery of optical and infrared accretion disc wind signatures in the black hole candidate MAXI J1348-630
- Mass transfer and magnetic braking in Sco X-1
- Kepler K2 Observations of Sco X-1: Orbital Modulations and Correlations with Fermi GBM and MAXI
- Precision Ephemerides for Gravitational-wave Searches -- IV: Corrected and refined ephemeris for Scorpius X-1
- Optical and near-infrared spectroscopy of the black hole transient 4U 1543-47 during its 2021 ultra-luminous state
- Constraining Progenitors of Observed LMXBs Using CARB Magnetic Braking
- Lens Flare: Magnified X-Ray Binaries as Passive Beacons in SETI
- Bowen emission from Aquila X-1: evidence for multiple components and constraint on the accretion disc vertical structure
- Formation of Sco X-1 induced by anomalous magnetic braking of Ap/Bp stars
- Accretion disc winds in X-ray binaries
- A search for signatures of interactions of X-ray binary outflows with their environments with ALMA
- The NICER view of Scorpius X-1
- Sco X-1 as a continuous gravitational waves source: modelling the secular evolution using MESA