Stars: binaries: spectroscopic
New binaries among UV-selected, hot subdwarf stars and population properties
... SWASP (1SWASP J220551.98 − 314103.9), and ASAS show vari- ability with mutually consistent periods of 0.341 559 ± 0.000 003, 0.341 563 ± 0.000 002, and 0.341 561 ± 0.000 002 d, respectively. The photometric periods are ...
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Searching for spectroscopic binaries within transition disk objects
... the spectroscopic binary ( SB ) fraction is similar or enhanced in the TD population relative to stars without such ...double-lined spectroscopic binary in Section 4 and evaluate possible biases and ...
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Hot subluminous stars : highlights from the MUCHFUSS and Kepler missions
... Besides pulsating stars, some sdB+WD binaries were found in the Kepler sample. In addition to ellipsoidal variations caused by tidal distortions of the sdB star, the Kepler light curves show variations ...
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Eclipsing white dwarf binaries
... both stars and the orbital inclination which makes model-independent mass-radius measurements ...double-lined spectroscopic binary, currently the only known double-lined eclipsing white dwarf binary, and ...
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The observed distribution of spectroscopic binaries from the Anglo-Australian planet search
... these stars (bear- ing in mind that the R HK index is merely a ‘snapshot’ measurement) would mean that the internal errors would not properly reflect the uncertainty in the RV ...inactive stars in Doppler ...
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Imaging the cool stars in the interacting binaries AE Aqr, BV Cen and V426 Oph
... late-type stars increases with increasing rotation ...such stars can be used to reconstruct ‘Doppler images’ of the distribution of cool, dark starspots on their stellar ...Interacting binaries, ...
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Pulsating variable stars and large spectroscopic surveys
... variable stars has taken a giant leap forward thanks to the photometric measurements provided by space missions like M ost , C o R o T, Kepler/K2, and B rite ...ground-based spectroscopic follow-up ...of ...
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On the orbital periods of the AM CVn stars HP Librae and V803 Centauri
... The spectroscopic S-wave behaviour observed in V803 Cen is seen in many interacting binaries and has, as far as we know, always been associated with the accretion stream–accretion disc impact, rather than ...
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Spectroscopic Analysis of Eclipsing Binary Stars
... In order to obtain the physical and geometric parameters of the binary components, we adjusted a numerical eclipsing binary model to the observations; the mass-ratio of ER Vul and BX And were fixed at the values of 0.96 ...
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A spectroscopic study of high mass X ray binaries
... accepted, stars exhibiting Be spectra may be expected to show, at various times, shell spectra (absorption lines with deep, narrow cores), emission lines and “normal” early-type ...Be stars have been seen ...
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Early disc accretion as the origin of abundance anomalies in globular clusters
... all stars having the same age and chemical abundance), are now known to host a vari- ety of anomalies, such as multiple discrete (or spreads in) populations in colour–magnitude diagrams and abundance variations in ...
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Spin period change and the magnetic fields of neutron stars in Be X-ray binaries in the SMC
... neutron stars are near spin equilibrium, then over half of them, including all with spin periods over about 100 seconds, have magnetic fields over the quantum critical level of ...neutron stars are not ...
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K2 variable catalogue : variable stars and eclipsing binaries in K2 campaigns 1 and 0
... The K2 mission (Howell et al. 2014) is the survey now being conducted with the repurposed Kepler space telescope, and be- came fully operational in June 2014. It will survey a series of fields near the ecliptic, ...
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Populations in old stellar systems
... HB stars in the outer radial ...the stars divide naturally into two groups, one with CN indices close to the adopted baseline (the CN weak group) and those with a CN index several tenths larger than that of ...
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Multimessenger Probes of High-energy Sources
... neutron stars or super- massimve black holes (like in jet og Active Galactic Nuclei) may interact with the radiation or dust surrounding them to produce these pions and kaons that decay into ...
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Neutron Stars and NuSTAR: A Systematic Survey of Neutron Star Masses in High Mass X ray Binaries & Characterization of CdZnTe Detectors for NuSTAR
... Depending on the spectral and luminosity class, OB star spectra have strong Balmer series lines, as well as lines from He, C, N, O etc. in the blue part of the optical spectrum (∼3500 ˚ A–5500 ˚ A). In contrast, there ...
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Doppler tomography and photometry of the cataclysmic variable 1RXS J064434 5+334451
... Townsley & G¨ansicke 2009), the disc will become steady and re- main bright for longer periods, suppressing the typical outbursts of CVs with lower mass transfer. These systems are commonly referred to as nova-like ...
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The EBLM Project V Physical properties of ten fully convective, very low mass stars
... Dartmouth and Exeter/Lyon isochrones are in good agreement, we used the Dartmouth isochrones to verify that the radius residu- als are not significantly overestimated due to the extrapolation of the Exeter/Lyon models. ...
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Optical spectroscopy of (candidate) ultracompact X ray binaries : constraints on the composition of the donor stars
... For a detailed discussion of the formation of ultra-compact bi- naries in the field we refer to Nelson et al. (1986); Nelemans et al. (2001); Podsiadlowski et al. (2002) and references therein. In short there are three ...
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Spectroscopic studies of hot, luminous stars
... Hot stars experience a large mass loss through stellar wind during their lifetimes, and this will slowly strip off the outer layers of the stars, exposing deeper ...these stars appear to be in, and ...
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