منابع مشابه
Revised masses of α Centauri
With the precise radial velocities lately published (Murdoch et al., 1993), a simultaneous least-squares adjustment of all visual and spectroscopic observations of the α Centauri system is now possible and likely to yield some accurate information. Such an orbit determination leads to a mass ratio in agreement with the astrometric estimate of Kamper & Wesselink (1978) but yields upward revision...
متن کاملCalibrations of α Centauri A & B
Detailed evolutionary models of the visual binary α Centauri, including pre main-sequence evolution, have been performed using the masses recently determined by Pourbaix et al. (1999). Models have been constructed using the CEFF equation of state, OPAL opacities, NACRE thermonuclear reaction rates and microscopic diffusion. A χ2-minimization is performed to derive the most reliable set of model...
متن کاملParallax and masses of α Centauri revisited⋆
Context. Despite the thorough work of van Leeuwen, the parallax of α Centauri is still far from being carved in stone. Any derivation of the individual masses is therefore uncertain, if not questionable. And yet, that does not prevent this system from being used for calibration purpose in several studies. Aims. We aim for more accurate model-free parallax and individual masses of this system. M...
متن کامل1B3 α-mPDGFRβ Ab and 2B4 α-flk-1 Ab
Both laboratory and early clinical studies to date have demonstrated that bispecific antibodies (BsAb) may have significant potential application in cancer therapy. The clinical development of BsAb as therapeutics has, however, been hampered by the difficulty in preparing the materials in sufficient quantity and quality by traditional methods. In recent years, a variety of recombinant methods h...
متن کاملA BeppoSAX/LECS X-ray observation of α Centauri
We present the X-ray spectrum of the nearby binary α Cen AB (G2V + K1V) that has been obtained from observations with the low-energy concentrator (LECS) onboard the BeppoSAX X-ray astronomy satellite. SAX combines, in contrast to previous satellites, simultaneous coverage of the 0.1-10 keV energy range with sufficient spectral resolution to determine emission measure distributions and elemental...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2000
ISSN: 0004-637X,1538-4357
DOI: 10.1086/308446