A black widow population dissection through HiPERCAM multi-band light curve modelling

Abstract

Black widows are extreme millisecond pulsar binaries where the pulsar wind ablates their low-mass companion stars. Their optical light curves vary periodically due to the high irradiation and tidal distortion of the companion, which allows us to infer the binary parameters. We present simultaneous multi-band observations obtained with the HIPERCAM instrument at the 10.4-m GTC telescope for six of these systems. The combination of this five-band fast photometer with the world's largest optical telescope enables us to inspect the light curve range near minima. We present the first light curve for PSR J1641+8049, as well as attain a significant increase in signal-to-noise and cadence compared with previous publications for the remaining 5 targets: PSR J0023+0923, PSR J0251+2606, PSR J0636+5129, PSR J0952-0607 and PSR J1544+4937. We report on the results of the light curve modelling with the Icarus code for all six systems, which reveals some of the hottest and densest companion stars known. We compare the parameters derived with the limited but steadily growing black widow population for which optical modelling is available. We find some expected correlations, such as that between the companion star mean density and the orbital period of the system, but also a puzzling positive correlation between the orbital inclination and the irradiation temperature of the companion. We propose such a correlation would arise if pulsars with magnetic axis orthogonal to their spin axis are capable of irradiating their companions to a higher degree.

arXiv comment18 pages (+12 pages for appendix), 12 figures (+13 in the appendix), 3 tables (1 in the appendix). Accepted for publication in MNRAS on 2023 January 17th

References in corpus (71)

• The ATNF Pulsar Catalogue
• MultiNest: an efficient and robust Bayesian inference tool for cosmology and particle physics
• A new extensive library of PHOENIX stellar atmospheres and synthetic spectra
• Multimodal nested sampling: an efficient and robust alternative to MCMC methods for astronomical data analysis
• The u'g'r'i'z' Standard Star Network
• The Sixteenth Data Release of the Sloan Digital Sky Surveys: First Release from the APOGEE-2 Southern Survey and Full Release of eBOSS Spectra
• The NextGen Model Atmosphere grid for $3000\le \Teff \le 10000\K$
• A New Electron Density Model for Estimation of Pulsar and FRB Distances
• Importance Nested Sampling and the MultiNest Algorithm
• A Radio Pulsar Spinning at 716 Hz
• Time-dependent force-free pulsar magnetospheres: axisymmetric and oblique rotators
• The Second Fermi Large Area Telescope Catalog of Gamma-ray Pulsars
• The NANOGrav 11-year Data Set: High-precision timing of 45 Millisecond Pulsars
• A Radio Pulsar/X-ray Binary Link
• Galactic Reddening in 3D from Stellar Photometry - An Improved Map
• Photometric Response Functions of the SDSS Imager
• ULTRACAM: an ultra-fast, triple-beam CCD camera for high-speed astrophysics
• Peering into the dark side: magnesium lines establish a massive neutron star in PSR J2215+5135
• Evidence for a Massive Neutron Star from a Radial-Velocity Study of the Companion to the Black Widow Pulsar PSR B1957+20
• The Green Bank Northern Celestial Cap Pulsar Survey - I: Survey Description, Data Analysis, and Initial Results
• Ab-initio pulsar magnetosphere: three-dimensional particle-in-cell simulations of oblique pulsars
• Modeling high-energy pulsar lightcurves from first principles
• Formation of black widows and redbacks -- two distinct populations of eclipsing binary millisecond pulsars
• White Dwarf Donors in Ultracompact Binaries: The Stellar Structure of Finite Entropy Objects
• The NANOGrav 12.5 yr Data Set: Observations and Narrowband Timing of 47 Millisecond Pulsars
• Discovery of the Optical Counterparts to Four Energetic Fermi Millisecond Pulsars
• KOI 1224, a Fourth Bloated Hot White Dwarf Companion Found With Kepler
• PSR J1810+1744: Companion Darkening and a Precise High Neutron Star Mass
• Intra-Binary Shock Heating of Black Widow Companions
• Optical spectroscopy and demographics of redback millisecond pulsar binaries
• HiPERCAM: a quintuple-beam, high-speed optical imager on the 10.4-m Gran Telescopio Canarias
• The Green Bank North Celestial Cap Pulsar Survey III: 45 New Pulsar Timing Solutions
• LOFAR discovery of the fastest-spinning millisecond pulsar in the Galactic field
• X-Ray Observations of Black Widow Pulsars
• The evolution of ultracompact X-ray binaries
• A Metal-Rich Low-Gravity Companion to a Massive Millisecond Pulsar
• The High Time Resolution Universe Pulsar Survey VIII: The Galactic millisecond pulsar population
• Discovery of a Gamma-ray Black Widow Pulsar by GPU-accelerated Einstein@Home
• GMRT discovery of PSR J1544+4937, an eclipsing black-widow pulsar identified with a Fermi LAT source
• Einstein@Home Discovery of the Gamma-ray Millisecond Pulsar PSR J2039-5617 Confirms Its Predicted Redback Nature
• A Spectroscopic Study of the Extreme Black Widow PSR J1311-3430
• Study of spider pulsar binary eclipses and discovery of an eclipse mechanism transition
• Multiband Optical Light Curves of Black-Widow Pulsars
• Observations and Modeling of the Companions of Short Period Binary Millisecond Pulsars: Evidence for High-Mass Neutron Stars
• Long Term Variability of a Black Widow's Eclipses -- A Decade of PSR J2051$-$0827
• An image-based search for pulsars among Fermi unassociated LAT sources
• Six New Millisecond Pulsars from Arecibo Searches of Fermi Gamma-Ray Sources
• Novel modelling of ultra-compact X-ray binary evolution - stable mass transfer from white dwarfs to neutron stars
• An active, asynchronous companion to a redback millisecond pulsar
• New Black Widows and Redbacks in the Galactic Field
• A 350-MHz GBT Survey of 50 Faint Fermi Gamma-ray Sources for Radio Millisecond Pulsars
• Variable Heating and Flaring of Three Redback Millisecond Pulsar Companions
• Detection and timing of gamma-ray pulsations from the $707$ Hz pulsar J0952$-$0607
• Black widow evolution: magnetic braking by an ablated wind
• Formation of the planet around the millisecond pulsar J1719-1438
• Measuring the mass of the black widow PSR J1555-2908
• Timing of Eight Binary Millisecond Pulsars Found with Arecibo in Fermi-LAT Unidentified Sources
• A Dense Companion to the Short-Period Millisecond Pulsar Binary PSR J0636+5128
• Black widow formation by pulsar irradiation and sustained magnetic braking
• Identification of the Optical Counterpart of Fermi Black Widow Millisecond Pulsar PSR J1544+4937
• A model for redistributing heat over the surface of irradiated spider companions
• Heated Poles on the Companion of Redback PSR J2339$-$0533
• PSR J0636+5128: A Heated Companion in a Tight Orbit
• HiPERCAM: A high-speed, quintuple-beam CCD camera for the study of rapid variability in the Universe
• Optical photometry of two transitional millisecond pulsars in the radio pulsar state
• Discovery, Timing, and Multiwavelength Observations of the Black Widow Millisecond Pulsar PSR J1555-2908
• Timing stability of black widow pulsars
• Irradiated but not eclipsed, the case of PSR J0610-2100
• The peculiar chemical abundance of the transitional millisecond pulsar PSR J1023+0038 -- Li enhancement
• Radiative pulsar magnetospheres: oblique rotators
• Multi-colour optical light curves of the companion star to the millisecond pulsar PSR J2051-0827

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