Volume 370, Number 3, May II 2001
|Page(s)||1004 - 1016|
|Section||Interstellar and circumstellar matter|
|Published online||15 May 2001|
Optical photometry of the PSR B0656+14 and its neighborhood
Ioffe Physical Technical Institute, Politekhnicheskaya 26, St. Petersburg 194021, Russia e-mail: email@example.com
2 The Pennsylvania State University, Department of Astronomy & Astrophysics, 525 Davey Lab, University Park, PA 16802, USA e-mail: firstname.lastname@example.org
3 Special Astrophysical Observatory of RAS, Karachai-Cherkessia, Nizhnij Arkhyz 357147, Russia e-mail: email@example.com
4 Observatorio Astronomico Nacional de Instituto de Astronomia de UNAM, Ensenada, B.C., 22860, Mexico e-mail: firstname.lastname@example.org
5 Astro Space Center of the Russian Academy of Sciences, Moscow 117810, Russia e-mail: email@example.com
Corresponding author: A. B. Koptsevich, firstname.lastname@example.org
Accepted: 22 February 2001
We present the results of 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 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 within 5´´from the pulsar.
Key words: stars: neutron / pulsars: individual: PSR B0656+14, Geminga
© ESO, 2001
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