HST/FOC observations confirm the presence of a spectral feature in the optical spectrum of Geminga
| dc.creator | Mignani, R. P. | |
| dc.creator | Caraveo, P. A. | |
| dc.creator | Bignami, G. F. | |
| dc.date | 1998-02-12 | |
| dc.date.accessioned | 2026-07-07T02:26:04Z | |
| dc.date.available | 2026-07-07T02:26:04Z | |
| dc.description | New optical and near-UV HST observations of Geminga are presented. When compared with previous ground-based and HST imaging, the data confirm and better define the presence of an emission feature centered at 6,000 Angstrom and superimposed on the thermal continuum best fitting the extreme-UV/soft X-ray data. This feature may be interpreted in terms of cyclotron emission originated from a mixture of H/He ions in the neutron star's atmosphere. In the case of pure Hydrogen, the feature wavelength would imply a magnetic field of order 3-5 10d11 G, consistent with the value deduced from the dynamical parameters of the pulsar. If due to a cyclotron emission, the observation of this feature would represent the first case of an in situ measurement of the surface magnetic field of an isolated neutron star. | |
| dc.description | 4 pages, 1 latex figure included, Accepted for publication on Astronomy and Astrophysics Letters | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9802158 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9802158 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/12125 | |
| dc.subject | Astrophysics | |
| dc.title | HST/FOC observations confirm the presence of a spectral feature in the optical spectrum of Geminga | |
| dc.type | text |