Bulletin de la Société Royale des Sciences de Liège

0037-9565 1783-5720

 

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Arti Joshi & Jeewan Chandra Pandey

IPHAS J025827.88+635234.9 and IPHAS J051814.33+294113.0: Two probable eclipsing intermediate polars

(Volume 87 - Année 2018 — Actes de colloques — First Belgo-Indian Network for Astronomy & Astrophysics (BINA) workshop - November 2016 - Nainital, India)
DOI: 10.25518/0037-9565.7629
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Mots-clés : astronomie, astrophysique, cataclysme, étoiles, polarimétrie, variabilité

Abstract

We present photometry in the R-band and linear polarimetry of two cataclysmic variables, namely IPHAS J025827.88 + 635234.9 and IPHAS J051814.33 + 294113.0. The data were obtained from 1-m class tele-scopes of the Aryabhatta Research Institute of Observational Sciences (ARIES; Nainital, India). In addition to the deep eclipse, strong short-period oscillations are also found. We derived a pulse period of (1203 ± 25) s for IPHAS J025827.88 + 635234.9 and (3277 ± 81) s for IPHAS J051814.33 + 294113.0. The presence of both orbital and spin modulations in these systems indicate that they belong to a class of intermediate polars. The full width at half depth of the eclipse is also found to be variable from epoch to epoch for IPHAS J025827.88 + 635234.9. The presence of a variable linear polarization of high value in these two sources indicates that these systems possess a strong magnetic field.

Keywords : astronomy, astrophysics, cataclysmic, polarimetry, stars, variability

Om dit artikel te citeren:

Arti Joshi & Jeewan Chandra Pandey, «IPHAS J025827.88+635234.9 and IPHAS J051814.33+294113.0: Two probable eclipsing intermediate polars», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 87 - Année 2018, Actes de colloques, First Belgo-Indian Network for Astronomy & Astrophysics (BINA) workshop - November 2016 - Nainital, India, 176 - 184 URL : http://popups.ulg.be/0037-9565/index.php?id=7629.

Over : Arti Joshi

Aryabhatta Research Institute of Observational Sciences (ARIES), Nainital-263002, India, arti@aries.res.in

Over : Jeewan Chandra Pandey

Aryabhatta Research Institute of Observational Sciences (ARIES), Nainital-263002, India