Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-07-09
Astrophys.J.597:479-493,2003
Astronomy and Astrophysics
Astrophysics
44 pages including 16 figures; ApJ, in press
Scientific paper
10.1086/378318
V1432 Aquilae (=RX J1940.2-1025) is the X-ray bright, eclipsing magnetic cataclysmic variable ~37' away from the Seyfert galaxy, NGC 6814. Due to a 0.3% difference between the orbital (12116.3 s) and the spin (12150 s) periods, the accretion geometry changes over the ~50 day beat period. Here we report the results of an RXTE campaign to observe the eclipse 25 times, as well as of archival observations with ASCA and BeppoSAX. Having confirmed that the eclipse is indeed caused by the secondary, we use the eclipse timings and profiles to map the accretion geometry as a function of the beat phase. We find that the accretion region is compact, and that it moves relative to the center of white dwarf on the beat period. The amplitude of this movement suggest a low-mass white dwarf, in contrast to the high mass previously estimated from its X-ray spectrum. The size of the X-ray emission region appears to be larger than in other eclipsing magnetic CVs. We also report on the RXTE data as well as the long-term behavior of NGC 6814, indicating flux variability by a factor of at least 10 on time scales of years.
Hellier Coel
Madejski Greg
Mukai Kazuhiko
Patteson J.
Skillman David R.
No associations
LandOfFree
X-ray Variability of the Magnetic Cataclysmic Variable V1432 Aql and the Seyfert Galaxy NGC 6814 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 X-ray Variability of the Magnetic Cataclysmic Variable V1432 Aql and the Seyfert Galaxy NGC 6814, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and X-ray Variability of the Magnetic Cataclysmic Variable V1432 Aql and the Seyfert Galaxy NGC 6814 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-136882