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| DOI | 10.1088/0004-637X/758/2/79 | ||||
| Año | 2012 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
We present time-resolved photometry of a cataclysmic variable discovered in the Isaac Newton Telescope Photometric H alpha Survey of the northern galactic plane, IPHAS J062746.41+014811.3, and classify the system as the fourth deeply eclipsing intermediate polar known with an orbital period of P-orb = 8.16 hr and a spin period of P-spin = 2210 s. The system shows mild variations of its brightness that appear to be accompanied by a change in the amplitude of the spin modulation at optical wavelengths and a change in the morphology of the eclipse profile. The inferred magnetic moment of the white dwarf is mu(wd) similar to (6-7) x 10(33) G cm(3), and in this case IPHAS J062746.41+014811.3 will evolve either into a short-period EX Hya-like intermediate polar with a large P-spin/P-orb ratio or, perhaps more likely, into a synchronized polar. Swift observations show that the system is an ultraviolet and X-ray source, with a hard X-ray spectrum that is consistent with those seen in other intermediate polars. The ultraviolet light curve shows orbital modulation and an eclipse, while the low signal-to-noise ratio X-ray light curve does not show a significant modulation on the spin period. The measured X-ray flux is about an order of magnitude lower than would be expected from scaling by the optical fluxes of well-known X-ray-selected intermediate polars.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Aungwerojwit, A. | - |
Naresuan Univ - Tailandia
CHE - Tailandia Naresuan University - Tailandia South Carolina Commission on Higher Education - Estados Unidos Ministry of Higher Education, Science, Research and Innovation - Tailandia |
| 2 | Gansicke, Boris T. | Hombre |
Univ Warwick - Reino Unido
The University of Warwick - Reino Unido University of Warwick - Reino Unido |
| 3 | Wheatley, Peter J. | Hombre |
Univ Warwick - Reino Unido
The University of Warwick - Reino Unido University of Warwick - Reino Unido |
| 4 | Pyrzas, Stylianos | Hombre |
Univ Warwick - Reino Unido
Universidad Católica del Norte - Chile The University of Warwick - Reino Unido University of Warwick - Reino Unido |
| 5 | Staels, B. | Hombre |
Universidad Católica del Norte - Chile
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| 6 | Krajci, Thomas | Hombre |
CBA Flanders - Bélgica
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| 7 | Rodriguez-Gil, Pablo | Hombre |
Astrokolkhoz Observ - Estados Unidos
Inst Astrofis Canarias - España UNIV LA LAGUNA - España Grupo de Telescopios Isaac Newton, España - España Astrokolkhoz Observatory - Estados Unidos Instituto Astrofisico de Canarias - España Universidad de La Laguna - España Isaac Newton Group - España |
| Agradecimiento |
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| This work is supported by the Thailand Research Fund under grant number MRG5180136. We gratefully acknowledge the observations of IPHAS J0627 taken through AAVSOnet, operated by the American Association of Variable Star Observers. We thank the referee for his/her constructive comments which have improved the paper. |