Refined mass and geometric measurements of the high-mass PSR J0740+ 6620
E Fonseca, HT Cromartie, TT Pennucci… - The Astrophysical …, 2021 - iopscience.iop.org
The Astrophysical Journal Letters, 2021•iopscience.iop.org
We report results from continued timing observations of PSR J0740+ 6620, a high-mass, 2.8
ms radio pulsar in orbit with a likely ultracool white dwarf companion. Our data set consists
of combined pulse arrival-time measurements made with the 100 m Green Bank Telescope
and the Canadian Hydrogen Intensity Mapping Experiment telescope. We explore the
significance of timing-based phenomena arising from general relativistic dynamics and
variations in pulse dispersion. When using various statistical methods, we find that …
ms radio pulsar in orbit with a likely ultracool white dwarf companion. Our data set consists
of combined pulse arrival-time measurements made with the 100 m Green Bank Telescope
and the Canadian Hydrogen Intensity Mapping Experiment telescope. We explore the
significance of timing-based phenomena arising from general relativistic dynamics and
variations in pulse dispersion. When using various statistical methods, we find that …
Abstract
We report results from continued timing observations of PSR J0740+ 6620, a high-mass, 2.8 ms radio pulsar in orbit with a likely ultracool white dwarf companion. Our data set consists of combined pulse arrival-time measurements made with the 100 m Green Bank Telescope and the Canadian Hydrogen Intensity Mapping Experiment telescope. We explore the significance of timing-based phenomena arising from general relativistic dynamics and variations in pulse dispersion. When using various statistical methods, we find that combining∼ 1.5 yr of additional, high-cadence timing data with previous measurements confirms and improves on previous estimates of relativistic effects within the PSR J0740+ 6620 system, with the pulsar mass ${m} _ {p}=\,{2.08} _ {-0.07}^{+ 0.07}\{M} _ {\odot} $
iopscience.iop.org