6533b833fe1ef96bd129bfb2
RESEARCH PRODUCT
A phase change in X Persei
S. J. UngerVictor RegleroP. RocheM. J. GorrodJ. KastnerAndrew NortonB. J. PayneM. J. CoeAmando EstelaJuan Fabregatsubject
PhysicsAbsorption spectroscopyInfraredBe starAstrophysics::High Energy Astrophysical PhenomenaX-ray binaryAstronomyBalmer seriesAstronomy and AstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysicssymbols.namesakeApparent magnitudeSpace and Planetary SciencesymbolsAstrophysics::Solar and Stellar AstrophysicsH-alphaAstrophysics::Earth and Planetary AstrophysicsEmission spectrumAstrophysics::Galaxy Astrophysicsdescription
We present a series of optical spectroscopic and infrared photometric observations of the Be/X-ray binary system X Per made over the last four years. Over this period the Hα line profile changed from emission to absorption, accompanied by a decrease in the infrared flux by over a magnitude and a flattening of the infrared spectrum. Such behaviour is consistent with the loss of the circumstellar disc or shell of material around the Be star and the reversion to a normal O/B-type star.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1991-12-15 | Monthly Notices of the Royal Astronomical Society |