6533b7d0fe1ef96bd125b8d7
RESEARCH PRODUCT
BeppoSAX observation of 4U 1907+09: Detection of a cyclotron line and its second harmonic
T. Di SalvoN. R. RobbaMauro OrlandiniSantina PirainoAndrea SantangeloG. CusumanoLuciano Burderisubject
PhysicsAtmospheric ScienceAstrophysics::High Energy Astrophysical PhenomenaCyclotronContinuum (design consultancy)Aerospace EngineeringAstronomy and AstrophysicsAstrophysicsSpectral linelaw.inventionMagnetic fieldNeutron starGeophysicsSpace and Planetary SciencelawGeneral Earth and Planetary SciencesAbsorption (electromagnetic radiation)Gravitational redshiftLine (formation)description
Abstract We report the detection of a cyclotron absorption line and its second harmonic in the average spectrum of the high mass X-ray binary 4U1907+09 observed by the BeppoSAX satellite. The broad band spectral capability of BeppoSAX allowed a good determination of the continuum against which the two absorption features are evident at ∼ 19 and ∼ 39 keV. Correcting for the gravitational redshift of a ∼ 1.4 M⊙ neutron star, the inferred surface magnetic field strength is Bsurf = 2.1 × 1012 G.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2000-01-01 |