Show simple item record

dc.contributor.authorTovmassian, G.
dc.contributor.authorGonzález Buitrago, D.
dc.contributor.authorThorstensen, J. R.
dc.contributor.authorMiguel Agustino, Enrique de
dc.identifier.citationTovmassian, G., González Buitrago, D., Thorstensen, J.R. ... de Miguel Agustino, E. (2017) . IGR J19552+0044: A new asynchronous short period polar Filling the gap between intermediate and ordinary polars. Astronomy & Astrophysics, 608, A36. DOI:
dc.description.abstractContext. Based on XMM-Newton X-ray observations IGR J19552+0044 appears to be either a pre-polar or an asynchronous polar. Aims. We conducted follow-up optical observations to identify the sources and periods of variability precisely and to classify this X-ray source correctly. Methods. Extensive multicolor photometric and medium- to high-resolution spectroscopy observations were performed and period search codes were applied to sort out the complex variability of the object. Results. We found firm evidence of discording spectroscopic (81.29 ± 0.01 m) and photometric (83.599 ± 0.002 m) periods that we ascribe to the white dwarf (WD) spin period and binary orbital period, respectively. This confirms that IGR J19552+0044 is an asynchronous polar. Wavelength dependent variability and its continuously changing shape point at a cyclotron emission from a magnetic WD with a relatively low magnetic field below 20 MG. Conclusions. The difference between the WD spin period and the binary orbital period proves that IGR J19552+0044 is a polar with the largest known degree of asynchronism (0.97 or 3%).es_ES
dc.publisherEDP Scienceses_ES
dc.relation.isversionofPublisher’s versión
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.subject.otherAccretion diskses_ES
dc.subject.otherMagnetic fieldes_ES
dc.titleIGR J19552+0044: A new asynchronous short period polar Filling the gap between intermediate and ordinary polarses_ES

Files in this item

This item appears in the following Collection(s)

Show simple item record

Atribución-NoComercial-SinDerivadas 3.0 España
Except where otherwise noted, this item's license is described as Atribución-NoComercial-SinDerivadas 3.0 España

Copyright © 2008-2010. ARIAS MONTANO. Repositorio Institucional de la Universidad de Huelva
Contact Us | Send Feedback |