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Revisiting the birth locations of pulsars B1929+10, B2020+28, and B2021+51

F. Kirsten ; Wouter Vlemmings (Institutionen för rymd- och geovetenskap, Radioastronomi och astrofysik) ; R. M. Campbell ; M. Kramer ; S. Chatterjee
Astronomy and Astrophysics (0004-6361). Vol. 577 (2015),
[Artikel, refereegranskad vetenskaplig]

We present new proper motion and parallax measurements obtained with the European VLBI Network (EVN) at 5 GHz for the three isolated pulsars B1929 + 10, B2020 + 28, and B2021 + 51. For B1929 + 10 we combined our data with earlier VLBI measurements and confirm the robustness of the astrometric parameters of this pulsar. For pulsars B2020 + 28 and B2021 + 51 our observations indicate that both stars are almost a factor of two closer to the solar system than previously thought, placing them at a distance of 1.39(-0.06)(+0.05) and 1.25(-0.17)(+0.14) kpc. Using our new astrometry, we simulated the orbits of all three pulsars in the Galactic potential with the aim to confirm or reject previously proposed birth locations. Our observations ultimately rule out a claimed binary origin of B1929 + 10 and the runaway star zeta Ophiuchi in Upper Scorpius. A putative common binary origin of B2020 + 28 and B2021 + 51 in the Cygnus Superbubble is also very unlikely.

Nyckelord: pulsars: individual: B1929+10, pulsars: individual: B2020+28, pulsars: individual: B2021+51, parallaxes, techniques: interferometric, proper motions



Denna post skapades 2015-08-07. Senast ändrad 2016-02-03.
CPL Pubid: 220361

 

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Projekt

Denna publikation är ett resultat av följande projekt:


Advanced radio astronomy in Europe (RADIONET-FP7) (EC/FP7/227290)