Query : 2002A&A...393..629B

2002A&A...393..629B - Astronomy and Astrophysics, volume 393, 629-635 (2002/10-2)

Pulsar bow-shock nebulae. III. Inclusion of a neutral component and Hα luminosity.


Abstract (from CDS):

The interaction of the wind from a pulsar (or more generally from a star) with the ambient medium gives rise to the formation of a bow-shock nebula. We present a model of adiabatic bow-shock nebulae, including the presence of a neutral component in the interstellar medium. As demonstrated in a previous paper (Bucciantini & Bandiera, 2001A&A...375.1032B, hereafter Paper I), the velocity and the luminosity of the pulsar, as well as the characteristics of the interstellar medium (ISM), play an essential role in determining the properties of bow shock nebulae. In particular, the Balmer emission is strongly affected by the rates of hydrogen charge-exchange and collisional excitation. So far, only one-component models have been proposed, treating the neutrals as a small perturbation. The distribution of neutral hydrogen in the nebula, derived by our model, is then used to determine how the Hα luminosity varies along the bow shock. We find that the luminosity trend is different for charge-exchange and collisional excitation, and that processes like diffusion or ionization may reduce the emission in the head of the nebula.

Abstract Copyright:

Journal keyword(s): shock waves - stars: pulsars: general - stars: winds, outflow - ISM: general

CDS comments: PSR J0437+4715 is a misprint for PSR J0437-4715.

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 PSR J0437-47 Psr 04 37 15.7994581776 -47 15 08.544351636           DC 855 0
2 PSR B0740-28 Psr 07 42 49.0730 -28 22 43.510           ~ 387 0
3 RX J1856.6-3754 Psr 18 56 35.11 -37 54 30.5     25.7     ~ 423 0
4 PSR J1959+2048 Psr 19 59 36.7480 +20 48 14.599   20.4       ~ 773 2
5 PSR B2223+65 Psr 22 25 52.36 +65 35 33.8           ~ 317 0

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