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Mignani, R.P.; Vande Putte, D.; Cropper, M.; Turolla, R.; Zane, S.; Pellizza, L.J.; Bignone, L.A.; Sartore, N.; Treves, A. "The birthplace and age of the isolated neutron star RX J1856.5-3754" (2013) Monthly Notices of the Royal Astronomical Society. 429(4):3517-3521
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Abstract:

X-ray observations unveiled various types of radio-silent isolated neutron stars (INSs), phenomenologically very diverse, e.g. the ~Myr old X-ray-dim INSs (XDINSs) and the ~kyr old magnetars. Although their phenomenology is much diverse, the similar periods (P = 2-10 s) and magnetic fields (≈1014G) suggest that XDINSs are evolved magnetars, possibly born from similar populations of supermassive stars. One way to test this hypothesis is to identify their parental star clusters by extrapolating backwards the NS velocity vector in the Galactic potential. By using the information on the age and space velocity of the XDINS RXJ1856.5-3754, we computed backwards its orbit in the Galactic potential and searched for its parental stellar cluster by means of a closest approach criterion. We found a very likely association with the Upper Scorpius OB association, for a NS age of 0.42 ± 0.08 Myr, a radial velocity Vr NS=67 ± 13 km s-1, and a present-time parallactic distance dπ NS=123-15 +11 pc. Our result confirms that the 'true' NS age is much lower than the spin-down age (τsd = 3.8Myr), and is in good agreement with the cooling age, as computed within standard cooling scenarios. The mismatch between the spin-down and the dynamical/cooling age would require either an anomalously large breaking index (n~20) or a decaying magnetic field with initial value B0≈1014G. Unfortunately, owing to the uncertainty on the age of the Upper Scorpius OB association and the masses of its members, we cannot yet draw firm conclusions on the estimated mass of the RXJ1856.5-3754 progenitor. © 2013 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society.

Registro:

Documento: Artículo
Título:The birthplace and age of the isolated neutron star RX J1856.5-3754
Autor:Mignani, R.P.; Vande Putte, D.; Cropper, M.; Turolla, R.; Zane, S.; Pellizza, L.J.; Bignone, L.A.; Sartore, N.; Treves, A.
Filiación:Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey RH5 6NT, United Kingdom
Kepler Institute of Astronomy, University of Zielona Góra, Lubuska 2, PL-65-265, Zielona Góra, Poland
Dipartimento di Fisica e Astronomia, Universit́a di Padova, via Marzolo 8, I-35131 Padova, Italy
Instituto de Astronomía y Física del Espacio, UBA-CONICET, C.C. 67, Suc. 28 (C1428ZAA), Buenos Aires, Argentina
INAF-Istituto di Astrofisica Spaziale e Fisica Cosmica Milano, via E. Bassini 15, I-20133 Milano, Italy
Dipartimento di Fisica e Matematica, Universitá dell'Insubria, via Valleggio 11, I-22100 Como, Italy
Palabras clave:Neutron; Stars
Año:2013
Volumen:429
Número:4
Página de inicio:3517
Página de fin:3521
DOI: http://dx.doi.org/10.1093/mnras/sts627
Título revista:Monthly Notices of the Royal Astronomical Society
Título revista abreviado:Mon. Not. R. Astron. Soc.
ISSN:00358711
CODEN:MNRAA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00358711_v429_n4_p3517_Mignani

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Citas:

---------- APA ----------
Mignani, R.P., Vande Putte, D., Cropper, M., Turolla, R., Zane, S., Pellizza, L.J., Bignone, L.A.,..., Treves, A. (2013) . The birthplace and age of the isolated neutron star RX J1856.5-3754. Monthly Notices of the Royal Astronomical Society, 429(4), 3517-3521.
http://dx.doi.org/10.1093/mnras/sts627
---------- CHICAGO ----------
Mignani, R.P., Vande Putte, D., Cropper, M., Turolla, R., Zane, S., Pellizza, L.J., et al. "The birthplace and age of the isolated neutron star RX J1856.5-3754" . Monthly Notices of the Royal Astronomical Society 429, no. 4 (2013) : 3517-3521.
http://dx.doi.org/10.1093/mnras/sts627
---------- MLA ----------
Mignani, R.P., Vande Putte, D., Cropper, M., Turolla, R., Zane, S., Pellizza, L.J., et al. "The birthplace and age of the isolated neutron star RX J1856.5-3754" . Monthly Notices of the Royal Astronomical Society, vol. 429, no. 4, 2013, pp. 3517-3521.
http://dx.doi.org/10.1093/mnras/sts627
---------- VANCOUVER ----------
Mignani, R.P., Vande Putte, D., Cropper, M., Turolla, R., Zane, S., Pellizza, L.J., et al. The birthplace and age of the isolated neutron star RX J1856.5-3754. Mon. Not. R. Astron. Soc. 2013;429(4):3517-3521.
http://dx.doi.org/10.1093/mnras/sts627