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A black widow population dissection through HiPERCAM multi-band light curve modelling
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Sánchez, D Mata, Kennedy, M. R., Clark, C. J., Breton, R. P., Dhillon, V. S., Voisin, G., Camilo, F., Littlefair, S., Marsh, T. R. and Stringer, J. (2023) A black widow population dissection through HiPERCAM multi-band light curve modelling. Monthly Notices of the Royal Astronomical Society, 520 (2). pp. 2217-2244. doi:10.1093/mnras/stad203 ISSN 1745-3933.
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Official URL: https://doi.org/10.1093/mnras/stad203
Abstract
Black widows are extreme millisecond pulsar binaries where the pulsar wind ablates their low-mass companion stars. In the optical range, their 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 (usgsrsiszs) 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, which can be attributed to the high number of Roche-lobe filling companions. On the other hand, the positive correlation between the orbital inclination and the irradiation temperature of the companion is puzzling. 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.
Item Type: | Journal Article | |||||||||||||||||||||
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Subjects: | Q Science > QB Astronomy | |||||||||||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | |||||||||||||||||||||
SWORD Depositor: | Library Publications Router | |||||||||||||||||||||
Library of Congress Subject Headings (LCSH): | Pulsars, Astrophysics, Neutron stars, Astronomy | |||||||||||||||||||||
Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | |||||||||||||||||||||
Publisher: | Oxford University Press | |||||||||||||||||||||
ISSN: | 1745-3933 | |||||||||||||||||||||
Official Date: | April 2023 | |||||||||||||||||||||
Dates: |
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Volume: | 520 | |||||||||||||||||||||
Number: | 2 | |||||||||||||||||||||
Page Range: | pp. 2217-2244 | |||||||||||||||||||||
DOI: | 10.1093/mnras/stad203 | |||||||||||||||||||||
Status: | Peer Reviewed | |||||||||||||||||||||
Publication Status: | Published | |||||||||||||||||||||
Re-use Statement: | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society All rights reserved. | |||||||||||||||||||||
Access rights to Published version: | Open Access (Creative Commons) | |||||||||||||||||||||
Date of first compliant deposit: | 26 July 2023 | |||||||||||||||||||||
Date of first compliant Open Access: | 1 August 2023 | |||||||||||||||||||||
RIOXX Funder/Project Grant: |
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