XMM-Newton observations of the eclipsing polar V2301 Oph

Details XMM-Newton observations of the eclipsing polar V2301 Oph XMM-Newton observations of the eclipsing polar V2301 Oph

2007-05-21

arxiv.org/abs/0705.2936v1

Mon.Not.Roy.Astron.Soc.379:1209-1216,2007

Astronomy and Astrophysics

Astrophysics

Accepted MNRAS

Scientific paper

10.1111/j.1365-2966.2007.12011.x

We present XMM-Newton observations of the eclipsing polar V2301 Oph which cover nearly 2.5 binary orbital cycles and 2 eclipses. This polar is believed to have the lowest magnetic field strength (7 MG) of any known polar. We find evidence for structure in the X-ray eclipse profile which shows a `standstill' feature lasting 26+/-4 sec. This allows us to place an upper limit on the mass of the white dwarf of ~1.2 Msun. We find no evidence for QPOs in the frequency range 0.02-10 Hz. This coupled with the absence of QPOs in RXTE data suggest that, if present, any oscillations in the shock front have a minimal effect on the resultant X-ray flux. We find no evidence for a distinct soft X-ray component in its spectrum - it therefore joins another 7 systems which do not show this component. We suggest that those systems which are asynchronous, have low mass transfer rates, or have accretion occurring over a relatively large fraction of the white dwarf are more likely to show this effect. We find that the specific mass transfer rate has to be close to 0.1 g cm^-2 s^-1 to predict masses which are consistent with that derived from our eclipse analysis. This maybe due to the fact that the low magnetic field strength allows accretion to take place along a wide range of azimuth.

Affiliated with

Also associated with

No associations

Rating

XMM-Newton observations of the eclipsing polar V2301 Oph 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 XMM-Newton observations of the eclipsing polar V2301 Oph, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and XMM-Newton observations of the eclipsing polar V2301 Oph will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-334820