All Outputs (6)

Excess barium in a K dwarf-white dwarf binary system. (1996)
Journal Article
Jeffries, R. D., & Smalley, B. (1996). Excess barium in a K dwarf-white dwarf binary system. Astronomy and Astrophysics, 315, L19-L22

We present spectroscopic evidence for an excess of the s-process element barium, in the rapidly rotating, K-dwarf component of the wide binary system 2REJ0357+283. The secondary star is a hot white dwarf (WD) and our result argues for a model where t... Read More about Excess barium in a K dwarf-white dwarf binary system..

2RE J0241-525: a nearby post-T Tauri visual binary system (1996)
Journal Article
Jeffries, R., Buckley, D., James, D., & Stauffer, J. (1996). 2RE J0241-525: a nearby post-T Tauri visual binary system. Monthly Notices of the Royal Astronomical Society, 281(3), 1001–1015. https://doi.org/10.1093/mnras/281.3.1001

We present high-spatial-resolution X-ray observations, photometry and spectroscopy of the two low-mass, active stars proposed as optical counterparts to the extreme ultraviolet source 2RE J0241 —525 (=EUVE J0241—530). It is confirmed that both stars,... Read More about 2RE J0241-525: a nearby post-T Tauri visual binary system.

The appearance of broad H$α$ in BL Lacertae (1996)
Journal Article
Corbett, E., Robinson, A., Axon, D., Hough, J., Jeffries, R., Thurston, M., & Young, S. (1996). The appearance of broad H$α$ in BL Lacertae. Monthly Notices of the Royal Astronomical Society, 281(3), 737–749. https://doi.org/10.1093/mnras/281.3.737

We present optical spectropolarimetry confirming Vermeulen et al.' recent discovery of a broad Ha emission line in BL Lacertae. This feature, which is present at about the same strength in spectra taken two days apart, is comparable in width (FWHM ≈... Read More about The appearance of broad H$α$ in BL Lacertae.

Wind-accretion induced rapid rotation and a new class of active star (1996)
Journal Article
Jeffries, R., & Stevens, I. (1996). Wind-accretion induced rapid rotation and a new class of active star. Monthly Notices of the Royal Astronomical Society, 279(1), 180–190. https://doi.org/10.1093/mnras/279.1.180

A physical model is presented to explain the occurrence of wide binary systems discovered at EUV wavelengths, such as 2RE J0044 + 093, which consist of a hot white dwarf and an ultra-rapidly rotating K-dwarf. It is difficult to explain the rapid rota... Read More about Wind-accretion induced rapid rotation and a new class of active star.

Are there any isolated old neutron stars in the ROSAT Wide Field Camera survey? (1996)
Journal Article
Manning, R., Jeffries, R., & Willmore, A. (1996). Are there any isolated old neutron stars in the ROSAT Wide Field Camera survey?. Monthly Notices of the Royal Astronomical Society, 278(2), https://doi.org/10.1093/mnras/278.2.577

We present the results of Monte Carlo simulations to predict the number of isolated old neutron stars (IONs) that are observed in the ROSAT Wide Field Camera (WFC) survey as a result of accretion-powered extreme ultraviolet (EUV) emission. Magnetic f... Read More about Are there any isolated old neutron stars in the ROSAT Wide Field Camera survey?.

Is 2RE J0357+283 the most coronally active star in the Galaxy? (1996)
Journal Article
Jeffries, R. D., Burleigh, M. R., & Robb, R. M. (1996). Is 2RE J0357+283 the most coronally active star in the Galaxy?. Astronomy and Astrophysics, 305,

The late-type stellar counterpart to the EUV source 2RE J0357+283 is found to be an ultra-fast rotating K2V star, with a rotation period of 8.76 hrs and vsini of 141+/-5km/s. If this were the only source of the EUV emission, then it would be the most... Read More about Is 2RE J0357+283 the most coronally active star in the Galaxy?.