Optical photometry of the PSR B0656+14 and its neighborhood

Details Optical photometry of the PSR B0656+14 and its neighborhood Optical photometry of the PSR B0656+14 and its neighborhood

2000-09-05

arxiv.org/abs/astro-ph/0009064v1

Astronomy and Astrophysics

Astrophysics

12 pages, 20 figures, submitted to A&A. Images are available in FITS format at http://www.ioffe.rssi.ru/astro/NSG/obs/0656-pho

Scientific paper

10.1051/0004-6361:20010289

We present the results of the broad-band photometry of the nearby middle-aged radio pulsar PSR B0656+14 and its neighborhood obtained with the 6-meter telescope of the SAO RAS and with the Hubble Space Telescope. The broad-band spectral flux $F_\nu$ of the pulsar decreases with increasing frequency in the near-IR range and increases with frequency in the near-UV range. The increase towards UV can be naturally interpreted as the Rayleigh-Jeans tail of the soft thermal component of the X-ray spectrum emitted from the surface of the cooling neutron star. Continuation of the power-law component, which dominates in the high-energy tail of the X-ray spectrum, to the IR-optical-UV frequencies is consistent with the observed fluxes. This suggests that the non-thermal pulsar radiation may be of the same origin in a broad frequency range from IR to hard X-rays. We also studied 4 objects detected in the pulsar's 5" neighborhood.

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