Astronomy and Astrophysics – Astrophysics – Galaxy Astrophysics
Scientific paper
2009-01-20
Astronomy and Astrophysics
Astrophysics
Galaxy Astrophysics
Accepted for publication in MNRAS
Scientific paper
10.1111/j.1365-2966.2009.14528.x
We report the discovery of an eclipsing polar, 2XMMi J225036.9+573154, using XMM-Newton. It was discovered by searching the light curves in the 2XMMi catalogue for objects showing X-ray variability. Its X-ray light curve shows a total eclipse of the white dwarf by the secondary star every 174 mins. An extended pre-eclipse absorption dip is observed in soft X-rays at phi=0.8-0.9, with evidence for a further dip in the soft X-ray light curve at phi~0.4. Further, X-rays are seen from all orbital phases (apart from the eclipse) which makes it unusual amongst eclipsing polars. We have identified the optical counterpart, which is faint (r=21), and shows a deep eclipse (>3.5 mag in white light). Its X-ray spectrum does not show a distinct soft X-ray component which is seen in many, but not all, polars. Its optical spectrum shows Halpha in emission for a fraction of the orbital period.
Barclay Thomas
Hakala Pasi
Ramsay Gavin
Rosen Simon
No associations
LandOfFree
2XMMi J225036.9+573154 - a new eclipsing AM Her binary discovered using XMM-Newton does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with 2XMMi J225036.9+573154 - a new eclipsing AM Her binary discovered using XMM-Newton, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 2XMMi J225036.9+573154 - a new eclipsing AM Her binary discovered using XMM-Newton will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-435350