On Strong P-Ṗ and Dm- Ṗ Correlations of Pulsars
Student: Stephanie Isioma Ossai (Project, 2025)
Department of Physics
University of Nigeria, Nsukka, Enugu State
Abstract
We have conducted a statistical analysis of a sample of 2064 pulsars with published values of dispersion measure, rotation period and period derivative. Our sample is heterogeneous, consisting of 1740 pulsars, 900 milliseconds pulsars and 138 magnetars. Scatter plots of period derivative (Ṗ) against period (P) reveals a positive trend for all the 2064 pulsars. Also, simple regression analysis of the data for the 2064 pulsars shows a strong correlation, (with correlation coefficient, r ~ 0.6) between the period derivative and period. This implies that pulsars with high spin down rate (Ṗ) are associated with high rotation period (P). Similarly, scatter plot of dispersion measure (DM) against the period derivative (Ṗ), shows a positive relationship between them with a very strong correlation (r ~ 0.8). This implies that pulsars with large spin down rates are associated with large dispersion measure.
Keywords
For the full publication, please contact the author directly at: isiomaossai54@gmail.com
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- UMA UKPAI SCHOOL OF THEOLOGY, UYO, AKWA IBOM STATE (AFFL TO UNIVERSITY OF UYO) 1
- Umaru Ali Shinkafi Polytechnic, Sokoto, Sokoto State 24
- Umaru Musa Yaradua University, Katsina, Katsina State 28
- Umca, Ilorin (Affiliated To University of Ibadan), Kwara State 1
- University of Abuja, Abuja, Fct 116
- University of Africa, Toru-Orua, Bayelsa State 4
- University of Benin, Benin City, Edo State 362
- University of Calabar Teaching Hospital School of Health Information Mgt. 1
- University of Calabar, Calabar, Cross River State 240
- University of Ibadan, Ibadan, Oyo State 14