The cyclotron line of Gemingas atmosphere and consequences
Giovanni F Bignami
Jan - 1998
DOI: 10.1016/S0273-1177(97)00810-7

journal : Advances in Space Research

Issue : 1-2
type: Article Journal

Abstract
Abstract In the panorama of Isolated Neutron Star (INS) optical astronomy new data are rapidly accumulating, especially on the recently discovered middle age (e 10 5 y) emitters. For Geminga, wide band photometry has led to the discovery of a spectral feature superimposed to the thermal continuum. Its most natural interpretion is that of emission at the ion cyclotron frequency, leading to a B-field value of H 35 10 11 G. This is the first in situ measurement of an INS surface magnetic field. Other relevant characteristics of Geminga are reviewed.

keywords : G. F. Bignami: ASI authors