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Follow-up timing of 12 pulsars discovered in Commensal Radio Astronomy FAST Survey

Fuente: arXiv

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Auteurs principaux:	Zhao, D., Yuan, J. P., Wang, N., Li, D., Wang, P., Xue, M. Y., Zhu, W. W., Miao, C. C., Yan, W. M., Wang, J. B., Yao, J. M., Wu, Q. D., Wang, S. Q., Sun, S. N., Kou, F. F., Chen, Y. T., Dang, S. J., Feng, Y., Liu, Z. J., Miao, X. L., Meng, L. Q., Yuan, M., Niu, C. H., Niu, J. R., Qian, L., Wang, S., Xie, X. Y., Xiao, Y. F., Yue, Y. L., You, S. P., Yu, X. H., Zhao, R. S., Yuen, R., Zhou, X., Zhang, L., Xie, M., Li, Y. X., Wang, C. J., Luo, Z. K., Gan, Z. Y., Sun, Z. Y., Chi, M. m.
Format:	Preprint
Publié:	2024
Sujets:	High Energy Astrophysical Phenomena
Accès en ligne:	Acceder al recurso
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author	Zhao, D. Yuan, J. P. Wang, N. Li, D. Wang, P. Xue, M. Y. Zhu, W. W. Miao, C. C. Yan, W. M. Wang, J. B. Yao, J. M. Wu, Q. D. Wang, S. Q. Sun, S. N. Kou, F. F. Chen, Y. T. Dang, S. J. Feng, Y. Liu, Z. J. Miao, X. L. Meng, L. Q. Yuan, M. Niu, C. H. Niu, J. R. Qian, L. Wang, S. Xie, X. Y. Xiao, Y. F. Yue, Y. L. You, S. P. Yu, X. H. Zhao, R. S. Yuen, R. Zhou, X. Zhang, L. Xie, M. Li, Y. X. Wang, C. J. Luo, Z. K. Gan, Z. Y. Sun, Z. Y. Chi, M. m. Wang, C. J.
author_facet	Zhao, D. Yuan, J. P. Wang, N. Li, D. Wang, P. Xue, M. Y. Zhu, W. W. Miao, C. C. Yan, W. M. Wang, J. B. Yao, J. M. Wu, Q. D. Wang, S. Q. Sun, S. N. Kou, F. F. Chen, Y. T. Dang, S. J. Feng, Y. Liu, Z. J. Miao, X. L. Meng, L. Q. Yuan, M. Niu, C. H. Niu, J. R. Qian, L. Wang, S. Xie, X. Y. Xiao, Y. F. Yue, Y. L. You, S. P. Yu, X. H. Zhao, R. S. Yuen, R. Zhou, X. Zhang, L. Xie, M. Li, Y. X. Wang, C. J. Luo, Z. K. Gan, Z. Y. Sun, Z. Y. Chi, M. m. Wang, C. J.
contents	We present phase-connected timing ephemerides, polarization pulse profiles and Faraday rotation measurements of 12 pulsars discovered by the Five-hundred-meter Aperture Spherical radio Telescope (FAST) in the Commensal Radio Astronomy FAST Survey (CRAFTS). The observational data for each pulsar span at least one year. Among them, PSR J1840+2843 shows subpulse drifting, and five pulsars are detected to exhibit pulse nulling phenomena. PSR J0640$-$0139 and PSR J2031$-$1254 are isolated MSPs with stable spin-down rates ($\dot{P}$) of $4.8981(6) \times $10$^{-20}$\,s\,s$^{-1}$ and $6.01(2) \times $10$^{-21}$\,s\,s$^{-1}$, respectively. Additionally, one pulsar (PSR J1602$-$0611) is in a neutron star - white dwarf binary system with 18.23-d orbit and a companion of $\leq$ 0.65M$_{\odot}$. PSR J1602$-$0611 has a spin period, companion mass, and orbital eccentricity that are consistent with the theoretical expectations for MSP - Helium white dwarf (He - WD) systems. Therefore, we believe it might be an MSP-He WD binary system. The locations of PSRs J1751$-$0542 and J1840+2843 on the $P-\dot{P}$ diagram are beyond the traditional death line. This indicates that FAST has discovered some low $\dot{E}$ pulsars, contributing new samples for testing pulsar radiation theories. We estimated the distances of these 12 pulsars based on NE2001 and YMW16 electron density models, and our work enhances the dataset for investigating the electron density model of the Galaxy.
format	Preprint
id	arxiv_https___arxiv_org_abs_2410_09518
institution	arXiv
publishDate	2024
record_format	arxiv
spellingShingle	Follow-up timing of 12 pulsars discovered in Commensal Radio Astronomy FAST Survey Zhao, D. Yuan, J. P. Wang, N. Li, D. Wang, P. Xue, M. Y. Zhu, W. W. Miao, C. C. Yan, W. M. Wang, J. B. Yao, J. M. Wu, Q. D. Wang, S. Q. Sun, S. N. Kou, F. F. Chen, Y. T. Dang, S. J. Feng, Y. Liu, Z. J. Miao, X. L. Meng, L. Q. Yuan, M. Niu, C. H. Niu, J. R. Qian, L. Wang, S. Xie, X. Y. Xiao, Y. F. Yue, Y. L. You, S. P. Yu, X. H. Zhao, R. S. Yuen, R. Zhou, X. Zhang, L. Xie, M. Li, Y. X. Wang, C. J. Luo, Z. K. Gan, Z. Y. Sun, Z. Y. Chi, M. m. Wang, C. J. High Energy Astrophysical Phenomena We present phase-connected timing ephemerides, polarization pulse profiles and Faraday rotation measurements of 12 pulsars discovered by the Five-hundred-meter Aperture Spherical radio Telescope (FAST) in the Commensal Radio Astronomy FAST Survey (CRAFTS). The observational data for each pulsar span at least one year. Among them, PSR J1840+2843 shows subpulse drifting, and five pulsars are detected to exhibit pulse nulling phenomena. PSR J0640$-$0139 and PSR J2031$-$1254 are isolated MSPs with stable spin-down rates ($\dot{P}$) of $4.8981(6) \times $10$^{-20}$\,s\,s$^{-1}$ and $6.01(2) \times $10$^{-21}$\,s\,s$^{-1}$, respectively. Additionally, one pulsar (PSR J1602$-$0611) is in a neutron star - white dwarf binary system with 18.23-d orbit and a companion of $\leq$ 0.65M$_{\odot}$. PSR J1602$-$0611 has a spin period, companion mass, and orbital eccentricity that are consistent with the theoretical expectations for MSP - Helium white dwarf (He - WD) systems. Therefore, we believe it might be an MSP-He WD binary system. The locations of PSRs J1751$-$0542 and J1840+2843 on the $P-\dot{P}$ diagram are beyond the traditional death line. This indicates that FAST has discovered some low $\dot{E}$ pulsars, contributing new samples for testing pulsar radiation theories. We estimated the distances of these 12 pulsars based on NE2001 and YMW16 electron density models, and our work enhances the dataset for investigating the electron density model of the Galaxy.
title	Follow-up timing of 12 pulsars discovered in Commensal Radio Astronomy FAST Survey
topic	High Energy Astrophysical Phenomena
url	https://arxiv.org/abs/2410.09518