Broad-band variability in accreting compact objects

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dc.contributor.authorScaringi S
dc.date.accessioned2017-05-10T04:10:24Z
dc.date.available2017-05-10T04:10:24Z
dc.date.issued2014en
dc.date.updated2017-05-01T02:08:05Z
dc.description.abstractCataclysmic variable stars are in many ways similar to X-ray binaries. Both types of systems possess an accretion disk, which in most cases can reach the surface (or event horizon) of the central compact object. The main difference is that the embedded gravitational potential well in X-ray binaries is much deeper than those found in cataclysmic variables. As a result, X-ray binaries emit most of their radiation at X-ray wavelengths, as opposed to cataclysmic variables which emit mostly at optical/ultraviolet wavelengths. Both types of systems display aperiodic broad-band variability which can be associated to the accretion disk. Here, the properties of the observed X-ray variability in XRBs are compared to those observed at optical wavelengths in CVs. In most cases the variability properties of both types of systems are qualitatively similar once the relevant timescales associated with the inner accretion disk regions have been taken into account. The similarities include the observed power spectral density shapes, the rms-flux relation as well as Fourier-dependant time lags. Here a brief overview on these similarities is given, placing them in the context of the fluctuating accretion disk model which seeks to reproduce the observed variability.en
dc.identifier.citationScaringi S Broad-band variability in accreting compact objects.en
dc.identifier.urihttp://hdl.handle.net/10092/13436
dc.language.isoen
dc.relation.uriarXiv:1407.0957v2en
dc.subjectastro-ph.HEen
dc.subjectastro-ph.SRen
dc.subjectCataclysmic variablesen
dc.subjectX-ray binariesen
dc.subjectOpticalen
dc.subjectTimingen
dc.subjectPhotometryen
dc.subjectindividual: MV Lyraeen
dc.subjectindividual: LU Cam.en
dc.subject.anzsrcField of Research::02 - Physical Sciences::0201 - Astronomical and Space Sciences::020106 - High Energy Astrophysics; Cosmic Raysen
dc.subject.anzsrcFields of Research::51 - Physical sciences::5101 - Astronomical sciences::510109 - Stellar astronomy and planetary systemsen
dc.titleBroad-band variability in accreting compact objectsen
dc.typeJournal Articleen
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