A Pulsar Supernova Association?

Supernovae. Part II: the aftermath

“…, by Jones, 1980, and Smith (1976), Taylor and Manchester (1977), and Irvine (1978), and the conference proceedings edited by Gursky and Ruffini (1975), Giacconi and Ruffini (1978), Smarr (1979), and Sieber and Wielebinski (1981) Tauri. Needham (1957Needham ( , 1970 (Large, Vaughn, and Mills, 1968), at about the same distance (Kristian, 1970), and of approximately the same age (Shklovskii, 1970). And the 0.15-s pulsar 1509-58 (Manchester, Tuohy, and D'Amico, 1982) is well within the SNR MSH 15-5(2), but is not obviously of the same age.…”

Origins of the Molonglo Radio Observatory ? The Cross and the MOST

“…At Molonglo, Tony Turtle undertook to search in the southern sky using the fan beam of the east-west arm and promptly discovered two (Turtle and Vaughan 1968), but then had to depart for an overseas commitment. Michael Large took up the search and almost immediately found the Vela pulsar within the confines of a supernova remnant and with a period of 0·09 s, very much faster than any known until then (Large et al 1968). Shortly afterwards an even faster pulsar was shown to be within the Crab Nebula using Cornell University's giant reflector at Arecibo and the only reasonable explanation in terms of spinning neutron stars became generally accepted.…”

Age of the VELA pulsar PSR 0833-45

“…Previously, the present author made a general suggestion that, to account for the high galactic latitudes and spatial pairs of some pulsars, these stars could be interpreted as high-velocity "runaways" from disrupted close binary systems (Stothers 1969). Among several developers of this idea (Gott, Gunn, and Ostriker 1970; Prentice 1970), Seward et al (1971) used it specifically to estimate the age of PSR 0833-45 from its location in Vela X, and found, tentatively, a value of ~ 10 5 yr. On the other hand, since the nebula is asymmetrical in form, the eccentric location of the pulsar is more likely due to the asymmetrical expansion of the nebula (Large, Vaughan, and Mills 1968), as Seward et al themselves were aware. Therefore, 10 5 yr should be regarded as only an upper limit.…”

“…The estimated uncertainty of these ages is about a factor of 2. From proper-motion measurements of the optical filaments, van den Bergh (1973) and van den Bergh, Marscher, and Terzian (1973) concluded that either the age of the remnant is > 10,000 yr or the supernova shell has been decelerated by the interstellar medium (it is also possible that the observed nebular material consists of shocked clouds moving more slowly than the blast wave itself, as suggested by McKee and Cowie (1975)). Therefore the true age could be smaller than 10 4 yr by an unknown factor.…”

“…The pulsar itself is not located at the center of Vela X (Large, Vaughan, and Mills 1968;van den Bergh, Marscher, and Terzian 1973). If it has moved significantly away from the center, it must have done so at high velocity because its age according to any determination is short.…”