Orbital Parameters of the Microquasar LSI +61 303

Abstract

New optical spectroscopy of the HMXB microquasar LSI +61 303 is presented. Eccentric orbital fits to our radial velocity measurements yield updated orbital parameters in good agreement with previous work. Our orbital solution indicates that the periastron passage occurs at radio phase 0.23 and the X-ray/radio outbursts are triggered 2.5--4 days after the compact star passage. The spectrum of the optical star is consistent with a B0 V spectral type and contributes ~65 percent of the total light, the remaining due to emission by a circumstellar disc. We also measure the projected rotational velocity to be v sin i = 113 km/s.

6 pages, accepted for publication in MNRAS

References in corpus (2)

• LSI+61303 in the context of microquasars
• gamma-ray emission from microquasars: a numerical model for LSI+61 303

Cited by in corpus (108)

• Be/X-ray binaries
• Variable Very High Energy Gamma-ray Emission from the Microquasar LS I +61 303
• Gamma-ray binaries: pulsars in disguise ?
• High-Mass X-ray Binaries in the Milky Way: A closer look with INTEGRAL
• Gamma-ray absorption in massive X-ray binaries
• VERITAS Observations of the gamma-Ray Binary LS I +61 303
• Fermi LAT Observations of LS I +61 303: First detection of an orbital modulation in GeV Gamma Rays
• Understanding the Very High-Energy Emission from Microquasars
• Accretion vs colliding wind models for the gamma-ray binary LS I +61 303: an assessment
• The Orbits of the Gamma-ray Binaries LS I +61 303 and LS 5039
• Periodic very high energy gamma-ray emission from LS I +61 303 observed with the MAGIC telescope
• Hadronic high-energy gamma-ray emission from the microquasar LS I $+61303$
• Population of persistent high mass X-ray binaries in the Milky Way
• A catalogue of high-mass X-ray binaries in the Galaxy: from the INTEGRAL to the Gaia era
• A magnetar-like event from LS I +61 303 and its nature as a gamma-ray binary
• On the binary nature of the gamma-ray sources AGL J2241+4454 (=MWC 656) and HESS J0632+057 (=MWC 148)
• INTEGRAL and XMM-Newton observations of LSI +61 303
• Joint H-alpha and X-Ray Observations of Massive X-Ray Binaries. II. The Be X-ray Binary and Microquasar LS I +61 303
• A compact pulsar wind nebula model of the gamma-ray loud binary LS I +61 303
• Propagation of very high energy gamma-rays inside massive binaries LS 5039 and LSI +61 303
• Multi-wavelength (radio, X-ray and gamma-ray) observations of the gamma-ray binary LS I +61 303
• Discovery of extended and variable radio structure from the gamma-ray binary system PSR B1259-63/LS 2883
• Correlated X-ray and Very High Energy emission in the gamma-ray binary LS I +61 303
• Chandra Observations of the Gamma-ray Binary LSI+61303: Extended X-ray Structure?
• High-energy neutrino emission from X-ray binaries
• Large-scale flow dynamics and radiation in pulsar gamma-ray binaries
• Supernova Kicks and Misaligned Be Star Binaries
• Long Term X-ray Monitoring Of The TeV Binary LS I +61 303 with RXTE
• Pulsar wind zone processes in LS 5039
• Multiwavelength Observations of LS I +61 303 with VERITAS, Swift and RXTE
• Non-thermal emission from secondary pairs in close TeV binary systems
• Discovery of slow X-ray pulsations in the high-mass X-ray binary 4U 2206+54
• VERITAS Observations of the TeV Binary LS I +61 303 During 2008-2010
• VLBA images of the precessing jet of LSI+61303
• A Time Dependent Leptonic Model for Microquasar Jets: Application to LSI 61 303
• Spectral signature of a free pulsar wind in the gamma-ray binaries LS 5039 and LSI +61$\degr$303
• Radio Spectral Index Analysis and Classes of Ejection in LS I +61 303
• On the origin of correlated X-ray/VHE emission from LS I +61 303
• gamma-ray emission from LS I +61 303: The impact of basic system uncertainties
• The Black Hole Candidate LSI+61303
• Swift/XRT monitoring of five orbital cycles of LSI +61 303
• Possible changes of state and relevant timescales for a neutron star in LS I +61°303
• Super-orbital variability of LS I +61°303 at TeV energies
• Long-term X-ray monitoring of LS I +61 303: analysis of spectral variability and flares
• LS I +61 303 as a potential neutrino source on the light of MAGIC results
• Astrometric observations of X-ray binaries using very long baseline interferometry
• Binaries with the eyes of CTA
• Probing the Nature of the unidentified TeV Gamma-ray source HESS J0632+057 with Swift
• High-energy emissions from the gamma-ray binary LS 5039
• Inverse Compton e-p pair cascade model for the gamma-ray production in massive binary LSI +61^o 303
• Overview of non-transient gamma-ray binaries and prospects for the Cherenkov Telescope Array
• Intrinsic physical properties and Doppler boosting effects in LSI+61303
• A Radio Pulsar Search of the Gamma-ray Binaries LS I +61 303 and LS 5039
• The twisted jets of Circinus X-1
• Gamma Ray Signal from the Pulsar Wind in the Binary Pulsar system PSR B1259-63/LS2883
• Exceptionally bright TeV flares from the binary LS I +61${}^{\circ }$ 303
• Constraints to neutron-star kicks in High-Mass X-ray Binaries with Gaia EDR3
• Long-term monitoring of LS I+61303 with INTEGRAL
• Origin of the long-term modulation of radio emission of LS I +61 303
• Radio Emission from the Be/Black Hole Binary MWC 656
• TeV Gamma-rays from accreting magnetars in massive binaries
• Orbital variability of the optical linear polarization of the $\gamma$-ray binary LS I +61 303 and new constraints on the orbital parameters
• A Faraday Rotation Study of the Stellar Bubble and HII Region Associated with the W4 Complex
• Spectral analysis in orbital/superorbital phase space and hints of superorbital variability in the hard X-rays of LS I +61 303
• Feasibility Study of Lense-Thirring Precession in LS I +61303
• Detection of the gamma-ray binary LS I +61 303 in a low flux state at Very High Energy gamma-rays with the MAGIC Telescopes in 2009
• Evidence of coupling between the thermal and nonthermal emission in the gamma-ray binary LS I +61 303
• XMM-Newton and ESO observations of the two unidentified gamma-ray sources 3EG J0616-3310 and 3EG J1249-8330
• Discovery of a periodical apoastron GeV peak in LS I +61°303
• H-alpha Emission Variability in the gamma-ray Binary LS I +61 303
• Search for radio pulsations in LS I +61 303
• Revisiting LS I +61 303 with VLBI astrometry
• The broad-band radio spectrum of LSI+61303 in outburst
• Long-term OVRO monitoring of LSI+61303: confirmation of the two close periodicities
• Evidence for periodic accretion-ejection in LSI+61303
• Multiwavelength Observations of The TeV Binary LS I +61 303 with VERITAS, Fermi-LAT and Swift-XRT During a TeV Outburst
• Impact of the orbital uncertainties on the timing of pulsars in binary systems
• Radio QPO in the $\gamma$-ray-loud X-ray binary LS I +61${}^{\circ }$303
• Connection between orbital modulation of H-alpha and gamma-rays in the Be/X-ray binary LSI+61303
• Modelling the correlated keV/TeV light curves of Be/gamma-ray binaries
• Tidal Interaction in High Mass X-ray Binaries
• Understanding the periodicities in radio and GeV emission from LS I+61303
• Simultaneous long-term monitoring of LS I +61°303 by OVRO and Fermi-LAT
• Does the gamma-ray binary LS I +61°303 harbor a magnetar?
• TeV Gamma Ray Astronomy
• Spectropolarimetric Study on Circumstellar Structure of Microquasar LS I +61deg 303
• Orbital and superorbital variability of LS I +61 303 at low radio frequencies with GMRT and LOFAR
• A Precessing Jet Scenario for the Multi-Wavelength Long-Term Modulation of LS I +61${}^{\circ }$303
• Optical spectroscopy of the Be/black hole binary MWC656 -- interaction of a black hole with a circumstellar disc
• Hour time-scale QPOs in the X-ray and radio emission of LS I +61${}^{\circ }$303
• AGNs and microquasars as high energy gamma-ray sources
• Owens Valley Radio Observatory monitoring of LS I +61°303 completes three cycles of the super-orbital modulation
• A precessing stellar disk model for superorbital modulations of the gamma-ray binary LS I+61${}^{\circ }$ 303
• Achromatic rapid flares in hard X-rays in the $\gamma$-ray binary LS I +61-303
• Implications of the radio spectral index transition in LS I +61°303 for its INTEGRAL data analysis
• VHE Gamma-rays from Galactic X-ray Binary Systems
• Rapid X-ray variability of the gamma-ray binary LS I+61 303
• Gamma ray attenuation in X-ray binaries: An application to LSI +61 303
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• Optical microflares in LS I +61 303 and the search for their multiwavelength counterpart
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• Whipple Telescope Observations of LS I +61 303: 2004-2006
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• Very High-energy Gamma-ray Emission from LS I +61${}^{\circ }$ ~303 Binary
• Observations of LSI+61303 with Swift
• INTEGRAL View of TeV Sources: A Legacy for the CTA Project
• Discovery of microquasar LS I +61 303 at very high energy gamma-rays with MAGIC