| Full text | |
| Author(s): |
Coelho, Jaziel G.
[1, 2]
;
de Araujo, Jose C. N.
[1]
;
Ladislau, Samantha M.
[1]
;
Nunes, Rafael C.
[1]
Total Authors: 4
|
| Affiliation: | [1] Inst Nacl Pesquisas Espaciais, Div Astrofis, Ave Astronautas 1758, BR-12227010 Sao Jose Dos Campos, SP - Brazil
[2] Univ Tecnol Fed Parana, Dept Fis, BR-85884000 Medianeira, PR - Brazil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | ASTROPHYSICAL JOURNAL; v. 920, n. 1 OCT 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
As is well known, pulsars are extremely stable rotators. However, although slowly, they spindown thanks to brake mechanisms, which are in fact still a subject of intense investigation in the literature. Since pulsars are usually modeled as highly magnetized neutron stars that emit beams of electromagnetic radiation out of their magnetic poles, it is reasonable to consider that the spindown has to do with a magnetic brake. Although an interesting and simple idea, a pure magnetic brake is not able to adequately account for the spindown rate. Thus, many alternative spindown mechanisms appear in the literature, among them the pulsar wind model, where the wind of particles coming from the pulsar itself can carry part of its rotational kinetic energy. Such a spindown mechanism depends critically on three parameters, namely, the dipole magnetic field (B), the angle between the magnetic and rotation axes (phi), and the density of primary particles (zeta) of the pulsar's magnetosphere. Differently from a series of articles in this subject, we consider for the first time in the literature a statistical modeling that includes a combination of a magnetic dipole and wind brakes. As a result, we are able to constrain the above referred parameters in particular for Crab and Vela pulsars. (AU) | |
| FAPESP's process: | 13/26258-4 - Superdense matter in the universe |
| Grantee: | Manuel Máximo Bastos Malheiro de Oliveira |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 15/15897-1 - Cherenkov Telescope Array - CTA |
| Grantee: | Luiz Vitor de Souza Filho |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 18/18036-5 - Investigating physical aspects beyond the standard model linked to the themes of dark energy, modified gravity, neutrinos and gravitational waves |
| Grantee: | Rafael da Costa Nunes |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |