Pulsars and interstellar medium - Multiple regression analysis of related parameters

Details Pulsars and interstellar medium - Multiple regression analysis of related parameters Pulsars and interstellar medium - Multiple regression analysis of related parameters

Jan 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ap%26ss.108..187a&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 108, no. 1, Jan. 1985, p. 187-193. Research supported by the Ministero del

Statistics

Computation

Computational Astrophysics, Interstellar Matter, Pulsars, Regression Analysis, Electron Density (Concentration), H Ii Regions, Peculiar Stars, Stellar Luminosity

Scientific paper

The relationship between pulsars and the interstellar-medium electron density (IED) is investigated by performing multiple stepwise regression analysis on the parameters for which linear correlations with the galactic continuum background temperature at 408 MHz (T408) have been established in 325 pulsars by Fracassini et al. (1983) (dispersion measure, radio luminosity, heliocentric distance, and galactocentric radius). An empirical relation is derived; the results are presented in a table and graph; and the pulsars are classified as peculiar, normal, or standard on the basis of their O-C values. Standard pulsars are shown to have actual T4O8 values equal to those calculated statistically and to confirm theoretically based T408-IED relationships, whereas normal pulsars are indicators of regions in which the observed and calculated T4O8 are in agreement only on average, and peculiar pulsars are associated with regions in which T4O8 is significantly above or below the average and IED is depleted (by accretion phenomena) or increased (by H II regions or star formation in front of the pulsar).

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