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Titolo: The statistics of radio pulsars: A spark model
Autore: Fan, GL; Cheng, KS; Manchester, RN;
- Indirizzi:
- Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China Univ HongKong Hong Kong Hong Kong Peoples R China Kong, Peoples R China CSIRO, Australia Telescope Natl Facil, Epping, NSW 1710, Australia CSIRO Epping NSW Australia 1710 e Natl Facil, Epping, NSW 1710, Australia
- Titolo Testata:
- ASTROPHYSICAL JOURNAL
fascicolo: 1,
volume: 557,
anno: 2001,
parte:, 1
pagine: 297 - 303
- SICI:
- 0004-637X(20010810)557:1<297:TSORPA>2.0.ZU;2-V
- Fonte:
- ISI
- Lingua:
- ENG
- Soggetto:
- GALACTIC DISTRIBUTION; MAGNETIC-FIELDS; FREE-ELECTRONS; POLAR CAPS; BEAMS; LUMINOSITY; EMISSION; POPULATION; RADIATION; BIRTHRATE;
- Keywords:
- pulsars : general; stars : neutron; stars : statistics;
- Tipo documento:
- Article
- Natura:
- Periodico
- Settore Disciplinare:
- Physical, Chemical & Earth Sciences
- Citazioni:
- 51
- Recensione:
- Indirizzi per estratti:
- Indirizzo: Fan, GL Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China Univ Hong Kong Hong Kong Hong Kong Peoples R China oples R China
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- Citazione:
- G.L. Fan et al., "The statistics of radio pulsars: A spark model", ASTROPHYS J, 557(1), 2001, pp. 297-303
Abstract
We use Monte Carlo techniques to relate a theoretical pulsar emission model to the observed distributions of pulse period, magnetic field strength, distance, and luminosity of radio pulsars. We assume that the radio luminosity of pulsars is proportional to the gap potential and current flow from the polar cap. The current is assumed to be nonuniform and clustered in sparks, but only those sparks swept by the line of sight contribute to the observed radio luminosity. We test our model by using the Ruderman-Sutherland vacuum gap potential and find that the simulated distributions are consistentwith those observed, with the exception of the period distribution. The model predicts more long-period pulsars than are observed. This discrepancy may result from the model itself, a reduced sensitivity of surveys to long-period pulsars, or the nondipole spin-down of pulsars.
ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/05/13 alle ore 21:19:25