A Population-Informed Mass Estimate for Pulsar J0740+6620
- Creators
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Farr, Will M.
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Chatziioannou, Katerina
Abstract
Galactic double neutron star systems have a tight mass distribution around ∼1.35 M_⊙, but the mass distribution of all known pulsars is broader (Tauris et al. 2017). Here we reconstruct the Alsing et al. (2018), Antoniadis et al. (2016) bimodal mass distribution of pulsars observed in binary systems, incorporating data from observations of J0740+6620 which were not available at the time of those works. Because J0740+6620 is an outlier in the mass distribution with non-negligible uncertainty in its mass measurement, its mass receives a large correction from the population, becoming m_(J0740+6620) = 2.03^(+0.10)_(-0.08) M_⊙ (median and 68% CI). Stochastic samples from our population model, including population-informed pulsar mass estimates, are available at https://github.com/farr/AlsingNSMassReplication and archived at Farr & Chatziioannou (2020).
Additional Information
© 2020. The American Astronomical Society. Published May 2020. We thank Cole Miller for useful discussion. WMF and KC are supported in part by the Simons Foundation. Software: matplotlib (Hunter 2007), stan (Carpenter et al. 2017), numpy (Oliphant 2006), scipy (Virtanen et al. 2020), astropy (Astropy Collaboration 2013; Price-Whelan et al. 2018), arviz (Kumar et al. 2019), pandas (The Pandas Development Team 2020), seaborn (Waskom et al. 2020).Attached Files
Published - Farr_2020p65.pdf
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Additional details
- Eprint ID
- 111625
- Resolver ID
- CaltechAUTHORS:20211022-230957539
- Simons Foundation
- Created
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2021-10-22Created from EPrint's datestamp field
- Updated
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2021-10-26Created from EPrint's last_modified field