AM CVn
XMM Newton observations of AM CVn binaries
... in AM CVn systems will not only affect the properties of their helium dominated accre- tion disks, but also their boundary ...period AM CVn ...
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XMM Newton observations of AM CVn binaries : V396 Hya and SDSS J1240 01
... It is noticeable that systems with orbital periods shorter than 25 mins are concentrated in the lower left hand corner of the colour-colour plane, ie compared to other CVs they show either a low soft X-ray flux or a high ...
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XMM Newton observations of AM CVn binaries : V396 Hya and SDSS J1240–01
... To determine the level of variability for our wider sample of AM CVn systems, we measured the rms of the power spectra for each of the X-ray and UV light curves. We did this for the 0.15−1 keV energy band ...
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Finding Needles in the Haystack: A Search for AM CVn Systems Using the Palomar Transient Factory
... outbursting AM CVn system discovered by the Palomar Transient Factory ...(PTF). AM CVn systems are stellar binaries with some of the smallest separations known and orbital periods ranging from ...
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High-speed photometry of Gaia14aae: an eclipsing AM CVn that challenges formation models
... channels for AM CVn formation. Our measured donor mass and radius do not fit with the contraction that is predicted for AM CVn donors descended from white dwarfs or helium stars at long ...
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The long term optical behaviour of helium accreting AM CVn binaries
... known AM CVn sys- tems of which half a dozen have been found to exhibit at least one outburst, where they increase in brightness typi- cally by 3–4 ...
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SDSS J124058 03 015919 2 : a new AM CVn star with a 37 min orbital period
... new AM CVn star (see table 1) shows that it has been observed on quite a few occasions, where it was al- ways close to V = ...outbursting AM CVn star, ‘SN2003aw’ at ∼34 minutes (Woudt & ...
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SDSS J080449 49+161624 8 : a peculiar AM CVn star from a colour selected sample of candidates
... in AM CVn stars: a double-peaked profile from the accretion disc, similar to the profiles seen in non-magnetic, hydrogen- rich CVs, plus a very narrow spike unique to the AM CVns, which is thought to ...
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A census of AM CVn stars : three new candidates and one confirmed 48 3 minute binary
... known AM CVn stars with SDSS photometry; open stars are the four new systems presented here (SDSS J0902, J1525, J1721, J1642 from left to ...of AM CVns in our spectroscopy or the DR7 spectroscopic ...
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On the orbital periods of the AM CVn stars HP Librae and V803 Centauri
... of AM CVn (Roelofs et ...in AM CVn and other inter- acting binaries, the strength of the S-wave is seen to vary strongly with phase, which can be explained by a varying visibility of the ...
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A 15 7 minute AM CVn binary discovered in K2
... A fourth category of AM CVn stars exists, which con- tains the two shortest-period binaries known (HM Cnc and V407 Vul, both with orbital periods less than 10 minutes). These systems do not seem to behave ...
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A 15.7-Minute AM CVn Binary Discovered in K2
... A fourth category of AM CVn stars exists, which con- tains the two shortest-period binaries known (HM Cnc and V407 Vul, both with orbital periods less than 10 minutes). These systems do not seem to behave ...
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Total eclipse of the heart: : the AM CVn Gaia14aae/ASSASN 14cn
... eclipsing AM CVn-system, Gaia14aae ...outbursting AM CVn period ...eclipsing AM CVn star known, and the first in which the WD is totally ...
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Total eclipse of the heart: the AM CVn Gaia14aae/ASSASN-14cn
... outbursting AM CVn stars and evolved CVs ...outbursting AM CVn stars, such as Gaia14aae, both have low mass transfer rates and extreme mass ratios, which are likely to impact on the duration ...
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Hubble space telescope parallaxes of AM CVn stars and astrophysical consequences
... five AM CVn ...objects. AM CVn, HP Lib and GP Com have never been observed to show brightness vari- ations much larger than about a tenth of a magnitude around their mean, and it is commonly ...
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Gaia14aae: the first fully-eclipsing AM CVn
... Gaia14aae was one of the first transients discovered by the Gaia Science Alerts project. It eclipses on a period of 50 minutes, and is the only known AM CVn in which the white dwarf is fully eclipsed. This ...
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Kinematics of the ultracompact helium accretor AM canum venaticorum
... for AM CVn implied by the central spike is significantly higher than previously thought, although there has been a study by Pearson (2003) suggesting, in fact, a mass ratio q ∼ ...
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Optical spectroscopy of (candidate) ultracompact X ray binaries : constraints on the composition of the donor stars
... of AM CVn stars (ultra-compact bina- ries which have white dwarf instead of neutron star accretors, see Nelemans 2005, for a recent review) only He donors are ...
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MOA 2010 BLG 523 : "Failed Planet" = RS CVn Star
... RS CVn stars were found very frequently at T ∼ 5250 ...RS CVn star, so one would expect to see the strong calcium H&K emission characteristic of such stars in the UVES ...
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Estimation of Intermodulation Rejection Value as a Function of Frequency in Power Amplifier Using AM AM and AM PM Diagrams Based on Power Series Analysis
... When multiple signals are passed through a common am- plifier, the nonlinearity of amplifier cause intermodula- tion (IM) products to be generated [2]. One of the major areas in analyzing nonlinear effect of power ...
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