Light curve analysis of a transitional millisecond pulsar PSR J1023+0038 with Kepler K2 mission

© Published under licence by IOP Publishing Ltd. PSR J1023+0038 has been known as a transitional pulsar-low-mass-X-ray binary (LMXB) system, which provides crucial information in understanding the evolution of pulsars in binary systems. We report analysis of 80-day continuous optical light curve of...

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Main Authors: C. Nilarat, P. Jaroenjittichai, A. P. Jaroenjittichai
Format: Conference Proceeding
Published: 2020
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/68062
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-680622020-04-02T15:18:05Z Light curve analysis of a transitional millisecond pulsar PSR J1023+0038 with Kepler K2 mission C. Nilarat P. Jaroenjittichai A. P. Jaroenjittichai Physics and Astronomy © Published under licence by IOP Publishing Ltd. PSR J1023+0038 has been known as a transitional pulsar-low-mass-X-ray binary (LMXB) system, which provides crucial information in understanding the evolution of pulsars in binary systems. We report analysis of 80-day continuous optical light curve of PSR J1023+0038 with the Kepler observations during K2 mission. The light curve was observed from May to August 2017, where the system appeared to be in its LMXB state. At ∼30 minutes time resolution, the data were fitted with a Gaussian window function, which generated a smoothed light curve with 100, 000 from 3545 raw data input. The time at the maxima and minima of the light curve was measured and compared with the orbit ephemeris predicted from a quadratic polynomial function published by previous work. We found that at MJD ∼57935 there appeared to be a constant delay of ∼1.06 hr added to the orbit, which then gradually recovered to the expected period at MJD ∼57965. Possible causes have been proposed to explain such delay includes a third body involvement or hot spots on the star. 2020-04-02T15:18:05Z 2020-04-02T15:18:05Z 2019-12-16 Conference Proceeding 17426596 17426588 2-s2.0-85077817240 10.1088/1742-6596/1380/1/012145 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85077817240&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/68062
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Physics and Astronomy
spellingShingle Physics and Astronomy
C. Nilarat
P. Jaroenjittichai
A. P. Jaroenjittichai
Light curve analysis of a transitional millisecond pulsar PSR J1023+0038 with Kepler K2 mission
description © Published under licence by IOP Publishing Ltd. PSR J1023+0038 has been known as a transitional pulsar-low-mass-X-ray binary (LMXB) system, which provides crucial information in understanding the evolution of pulsars in binary systems. We report analysis of 80-day continuous optical light curve of PSR J1023+0038 with the Kepler observations during K2 mission. The light curve was observed from May to August 2017, where the system appeared to be in its LMXB state. At ∼30 minutes time resolution, the data were fitted with a Gaussian window function, which generated a smoothed light curve with 100, 000 from 3545 raw data input. The time at the maxima and minima of the light curve was measured and compared with the orbit ephemeris predicted from a quadratic polynomial function published by previous work. We found that at MJD ∼57935 there appeared to be a constant delay of ∼1.06 hr added to the orbit, which then gradually recovered to the expected period at MJD ∼57965. Possible causes have been proposed to explain such delay includes a third body involvement or hot spots on the star.
format Conference Proceeding
author C. Nilarat
P. Jaroenjittichai
A. P. Jaroenjittichai
author_facet C. Nilarat
P. Jaroenjittichai
A. P. Jaroenjittichai
author_sort C. Nilarat
title Light curve analysis of a transitional millisecond pulsar PSR J1023+0038 with Kepler K2 mission
title_short Light curve analysis of a transitional millisecond pulsar PSR J1023+0038 with Kepler K2 mission
title_full Light curve analysis of a transitional millisecond pulsar PSR J1023+0038 with Kepler K2 mission
title_fullStr Light curve analysis of a transitional millisecond pulsar PSR J1023+0038 with Kepler K2 mission
title_full_unstemmed Light curve analysis of a transitional millisecond pulsar PSR J1023+0038 with Kepler K2 mission
title_sort light curve analysis of a transitional millisecond pulsar psr j1023+0038 with kepler k2 mission
publishDate 2020
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85077817240&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/68062
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