Search Publications
γ2 Velorum: orbital solution and fundamental parameter determination with SUSI
Tuthill, P. G.; Davis, J.; Tango, W. J. +1 more
The first complete orbital solution for the double-lined spectroscopic binary system γ2 Velorum, obtained from measurements with the Sydney University Stellar Interferometer (SUSI), is presented. This system contains the closest example of a Wolf-Rayet star and the promise of full characterization of the basic properties of this exotic …
Absolute magnitudes of OB and Be stars based on Hipparcos parallaxes - III
Wegner, W.
The absolute visual magnitudes, MV, of A-M stars are based on calculated Hipparcos trigonometric parallaxes. The sample used consists of 30986 unreddened and reddened A-M stars in luminosity classes Ia, Iab, Ib, II, III, IV and V. The colour excesses of the reddened stars were calculated using the mean colour indices, according to the S…
Semiregular variables in the solar neighbourhood
Glass, I. S.; van Leeuwen, F.
Period-luminosity sequences have been shown to exist among the semiregular variables (SRVs) in the Magellanic Clouds, the bulge of the Milky Way galaxy and elsewhere. Using modern-period and revised Hipparcos parallax data, this paper demonstrates that they also appear among the M giant SRVs of the solar neighbourhood. Their distribution in the K,…
η Muscae: a young detached binary with two identical components
Demircan, O.; Bakış, V.; Eker, Z. +1 more
High-resolution (λ/dλ ~ 41000) echelle spectra of the multiple system η Muscae were analysed. Precise spectroscopic orbital elements of the close pair η Muscae-A were obtained by means of two techniques; cross-correlation and spectral disentangling. The updated light elements of the close pair were derived using new photometric and spectroscopic d…
Orbital solution and fundamental parameters of σ Scorpii
Tuthill, P. G.; Davis, J.; Tango, W. J. +2 more
The first orbital solution for the spectroscopic pair in the multiple star system σ Scorpii, determined from measurements with the Sydney University Stellar Interferometer, is presented. The primary component is of β Cephei variable type and has been one of the most intensively studied examples of its class. The orbital solution, when combined wit…
Further observations of Hipparcos red stars and standards for UBV(RI)C photometry
Kilkenny, D.; Marang, F.; Koen, C. +2 more
We present homogeneous and standardized UBV(RI)C JHK photometry for over 100 M stars selected from an earlier paper on the basis of apparent photometric constancy. L photometry has been obtained for stars brighter than about L = 6. Most of the stars have a substantial number of UBV(RI)C observations and, it is hoped, will pro…
The double-lined spectroscopic binary HR 6046
Griffin, R. E. M.; Scarfe, C. D.; Griffin, R. F.
HR 6046 has long been known as a single-lined binary system, for which preliminary orbital solutions were given in the 1930s, but the nature of the secondary star in the system has to date appeared puzzling. The rather large masses which the component stars were once believed to possess caused much speculation that the secondary was a `collapsed s…
Detection of 6-cm radio-continuum emission from an EB (β-Lyrae type) variable star - HIP 68718
Filipović, M. D.; Anderson, M. W. B.
We report the 6-cm radio-continuum detection of a previously unknown radio star, HIP 68718, identified by the Hipparcos satellite as an EB or β-Lyrae type optical variable. Only five prior radio detections of this type are reported in the literature. The radio source (VLA J140402-002145) was detected at the 6σ level, with an associated <1arcsec…