We report the discovery and analysis of a massive, compact, hierarchical triple system (TIC 470710327) initially identified by citizen scientists in data obtained by NASA’s Transiting Exoplanet ...Survey Satellite (TESS). Spectroscopic follow-up observations obtained with the HERMES spectrograph, combined with eclipse-timing variations (ETVs), confirm that the system is comprised of three OB stars, with a compact 1.10 d eclipsing binary and a non-eclipsing tertiary on a 52.04 d orbit. Dynamical modelling of the system (from radial velocity and ETVs) reveal a rare configuration wherein the tertiary star (O9.5-B0.5V; 14–17 Mꙩ) is more massive than the combined mass of the inner binary (10.9–13.2 Mꙩ). Given the high mass of the tertiary, we predict that this system will undergo multiple phases of mass transfer in the future, and likely end up as a double neutron star gravitational wave progenitor or an exotic Thorne–Żytkow object. Further observational characterization of this system promises constraints on both formation scenarios of massive stars as well as their exotic evolutionary end-products.
Staging and therapy monitoring of malignant lymphomas relies heavily on imaging using arbitrary size criteria from computed tomography (CT) and sometimes non-specific radionuclide studies to assess ...the activity of the disease. Treatment decisions are based on early assessment of the response to therapy and the residual volume of the disease. Our initial experience is reported using a new noninvasive, inexpensive, and reproducible passive imaging modality, Dynamic Infrared Imaging (DIRI), which may add a new dimension to functional imaging. This system relies on its ability to filter the raw infrared signal using biological oscillatory behavior. It detects and analyzes minute oscillations of temperature and heat distribution in tumors.
We present the status of the deficit in semileptonic decays of B mesons. All the results presented are based on measurements of the inclusive and exclusive semileptonic decays at the CLEO II detector ...at the Cornell CESR collider facility. In particular, detailed results on recent measurement of the B{yields}D**l{nu} are given, and an outline of the search for nonresonant decays is presented.
Measurement of αS from τ decays Sanghera, S.; Skwarnicki, T.; Wei, G. ...
Physics letters. B,
08/1995, Letnik:
356, Številka:
4
Journal Article
Recenzirano
We present measurements of spectral moments extracted from the invariant mass distributions of the final states of hadronic τ decay products recorded in the CLEO detector. From a fit of theoretical ...predictions to the measurements of spectral moments and the total hadronic decay width of the τ, we determine the strong coupling constant and a set of non-perturbative QCD parameters. The strong coupling constant is measured to be
α
s
(
m
τ
) = 0.306 ± 0.024, which when extrapolated to the
Z mass, yields
α
s
(
M
z
) = 0.114 ± 0.003.
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