520 research outputs found
Start-up incentives the Netherlands
Generally, there are three different types of start-up incentive for unemployed and inactive people in the Netherlands. The first is a set of incentives for potential entrepreneurs receiving Unemployment Benefits (UB) (Werloosheidwet - WW). Such incentives have existed since 2006 and were adjusted in 2013. Second, as of 2004 there are specific incentives for people who receive social assistance (Wet werk en inkomen - WWB). Third, there are incentives for people who are ill or who have a work disability and receive benefits related to their work incapacity (Wet werk en inkomen naar arbeidsvermogen – WIA for work disability; Ziektewet for illness; or Wajong for young disabled). These incentives are all aimed at stimulating unemployed people to leave benefits by starting-up a business. They also appear to be cost-effective, as often the incentive consists of guidance for the new entrepreneur and the temporary abolishment of the obligation to apply for a job
Probing the origin of quasi-periodic oscillations:the short-time-scale evolution of phase lags in GRS 1915+105
Radio detections of IR-selected runaway stellar bow shocks
Massive stars moving at supersonic peculiar velocities through the
interstellar medium (ISM) can create bow shocks, arc-like structures at the
interface between the stellar wind and the ISM. Many such bow shocks have been
detected and catalogued at IR wavelengths, but detections in other wavebands
remain rare. Strikingly, while electrons are expected to be accelerated in the
bow shock and their non-thermal emission may include synchrotron emission at
low frequencies, only two massive runaway stellar bow shocks have to date been
detected in the radio band. Here, we examine a sample of fifty IR-detected bow
shocks from the E-BOSS catalogues in recently released radio images from the
Rapid ASKAP Continuum Survey (RACS). We identify three confident and three
likely counterparts, as well as three inconclusive candidates requiring
confirmation via follow-up observations. These detections significantly
increase the number of known radio massive stellar bow shocks and highlight the
advantage of dedicated searches with current and next-generation radio
telescopes. We investigate the underlying radio emission mechanism for these
radio sources, finding a mix of free-free-dominated and synchrotron-dominated
systems. We also discuss the non-detected targets by putting constraints on
their emission properties and investigating their detectability with future
observations. Finally, we propose several future avenues of research to advance
the study and understanding of bow shocks at radio frequencies.Comment: 17 pages, 12 figures, 3 tables. Resubmitted to MNRAS after final
round of very minor referee comment
Discovery of accretion-driven pulsations in the prolonged low X-ray luminosity state of the Be/X-ray transient GX 304-1
We present our Swift monitoring campaign of the slowly rotating neutron star
Be/X-ray transient GX 304-1 (spin period of ~275 s) when the source was not in
outburst. We found that between its type-I outbursts the source recurrently
exhibits a slowly decaying low-luminosity state (with luminosities of
10^(34-35) erg/s). This behaviour is very similar to what has been observed for
another slowly rotating system, GRO J1008-57. For that source, this
low-luminosity state has been explained in terms of accretion from a
non-ionised ('cold') accretion disk. Due to the many similarities between both
systems, we suggest that GX 304-1 enters a similar accretion regime between its
outbursts. The outburst activity of GX 304-1 ceased in 2016. Our continued
monitoring campaign shows that the source is in a quasi-stable low-luminosity
state (with luminosities a few factors lower than previously seen) for at least
one year now. Using our NuSTAR observation in this state, we found pulsations
at the spin period, demonstrating that the X-ray emission is due to accretion
of matter onto the neutron star surface. If the accretion geometry during this
quasi-stable state is the same as during the cold-disk state, then matter
indeed reaches the surface (as predicted) during this latter state. We discuss
our results in the context of the cold-disk accretion model.Comment: 5 pages, 2 figures, accepted for A&A Letter
ATCA radio detection of the new X-ray transient IGR J17591-2342 suggests a black hole candidate
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