A5078199074- Pulsars and Gravitational Waves Research
- High-pressure geophysics and materials
- Stellar, planetary, and galactic studies
- Geophysics and Gravity Measurements
- Astrophysical Phenomena and Observations
- Particle accelerators and beam dynamics
- Solar and Space Plasma Dynamics
- Particle Accelerators and Free-Electron Lasers
- Geophysics and Sensor Technology
- Superconducting Materials and Applications
- Gamma-ray bursts and supernovae
Norwegian University of Science and Technology
2022-2024
Universitat Politècnica de Catalunya
2024
Los Alamos National Laboratory
2024
ABSTRACT We present the first multiband optical light curves of PSR J1622−0315, among most compact known redback binary millisecond pulsars, with an orbital period $P_\mathrm{orb}=3.9 \, \text{h}$. find a flux modulation two maxima per cycle and peak-to-peak amplitude ${\simeq} 0.3 \text{mag}$, which we attribute to ellipsoidal shape tidally distorted companion star. The colours imply late-F early-G spectral-type do not show any detectable temperature changes along orbit. This suggests that...
Context. PSR J1023+0038 is the first millisecond pulsar that was ever observed as an optical and UV pulsar. So far, it only transitional The rotation- accretion-powered emission mechanisms hardly individually explain characteristics of pulsations. A synergistic model, combining these standard processes, proposed to origin X-ray/UV/optical Aims. We study phase lag between pulses in X-ray bands gain insight into physical cause it. Methods. performed a detailed timing analysis simultaneous or...
ABSTRACT Radio emission from pulsars can be used to map out their distances through dispersion measure (DM), which quantifies the amount of radio pulse dispersion. However, this method relies on accurately modelling free electron density in line sight. Here, we present a detailed study multiwavelength PSR J1720−0534, black widow compact binary millisecond pulsar discovered 2021, latest model Galaxy places at only 191 pc. We obtained and analysed deep observations γ-ray (Fermi-Large Area...
Abstract The companion to PSR J1622-0315, one of the most compact known redback millisecond pulsars, shows extremely low irradiation despite its short orbital period. We model this system determine binary parameters, combining optical observations from New Technology Telescope in 2017 and Nordic Optical 2022 with modeling code ICARUS . find a best-fit neutron star mass 2.3 ± 0.4 M ⊙ , 0.15 0.02 detect for first time low-level asymmetry minima as well change maxima light curves over five...
Radio emission from pulsars can be used to map out their distances through dispersion measure (DM), which quantifies the amount of radio pulse dispersion. However, this method relies on accurately modeling free electron density in line sight. Here, we present a detailed study multi-wavelength PSR J1720-0534, black widow compact binary millisecond pulsar discovered 2021, latest model Galaxy (YMW16; Yao et al. 2017) places at only 191 pc. We obtained and analyzed deep observations $\gamma$-ray...
The companion to PSR J1622-0315, one of the most compact known redback millisecond pulsars, shows extremely low irradiation despite its short orbital period. We model this system determine binary parameters, combining optical observations from NTT in 2017 and NOT 2022 with modeling code ICARUS. find a best-fit neutron star mass $2.3 \pm 0.4\,\text{M}_\odot $, $0.15 0.02\,\text{M}_\odot$. detect for first time low-level asymmetry minima as well change maxima light curves over five years....
We report here the results obtained from a systematic optical photometric survey aimed at finding new compact binary millisecond pulsars (also known as "spiders"): COmpact BInary PULsar SEarch (COBIPULSE). acquired multi-band images over one year around $33$ unidentified Fermi-LAT sources, selected pulsar candidates based on their curved GeV spectra and steady $\gamma$-ray emission. present discovery of four variables coinciding with Fermi sources 3FGL J0737.2$-$3233, J2117.6$+$3725 (two...
Abstract We report here the results obtained from a systematic optical photometric survey aimed at finding new compact binary millisecond pulsars (also known as “spiders”): COmpact BInary PULsar SEarch. acquired multiband images over 1 yr around 33 unidentified Fermi Large Area Telescope sources, selected pulsar candidates based on their curved GeV spectra and steady γ -ray emission. present discovery of four variables coinciding with sources 3FGL J0737.2−3233, J2117.6+3725 (two systems in...
We present the first multi-band optical light curves of PSR J1622-0315, among most compact known redback binary millisecond pulsars, with an orbital period Porb=3.9 h. find a flux modulation two maxima per cycle and peak-to-peak amplitude about 0.3 mag, which we attribute to ellipsoidal shape tidally distorted companion star. The colours imply late-F early-G spectral type do not show any detectable temperature changes along orbit. This suggests that irradiation star's inner face by pulsar...
PSR J1023+0038 is the first millisecond pulsar that was ever observed as an optical and UV pulsar. So far, it only transitional The rotation- accretion-powered emission mechanisms hardly individually explain characteristics of pulsations. A synergistic model, combining these standard processes, proposed to origin X-ray/UV/optical We study phase lag between pulses in X-ray bands gain insight into physical cause it. performed a detailed timing analysis simultaneous or quasi-simultaneous...