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|Title:||The discovery of RE 1307 + 535: the shortest period AM Her system|
|Authors:||Osborne, Julian Paul|
Beardmore, A. P.
Wheatley, P. J.
Watson, M. G.
Mason, K. O.
Hassall, B. J. M.
King, A. R.
|Citation:||Monthly Notices Of The Royal Astronomical Society, 1994, 270 (3), pp. 650-662 (13)|
|Abstract:||We report on a ROSAT Wide Field Camera EUV survey observation of RE 1307 + 535 which, together with optical spectroscopic and photometric observations, shows that this object is an AM Her system. These observations reveal that RE 1307 + 535 has an orbital period of 79.69 min, the shortest orbital period known for such a system. RE 1307 + 535 was observed by us in both high (V = 17–18) and low (V = 20–21) states, with evidence of cyclotron emission being seen in both cases. We use the high-state spectroscopy to show that the optical emission comes from a region with a magnetic field, B ≈ 30–40 MG. We derive EUV temperature and luminosity limits. IRCAM infrared photometry is used to put a lower limit on the distance to RE 1307 + 535 of d > 705 pc. RE 1307 + 535 is thus one of the most distant AM Her systems known, and is the first that is at a measured distance of z > 630 pc above the Galactic plane.|
|Rights:||This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 1994 Royal Astronomical Society. Provided by the NASA Astrophysics Data System. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. Deposited with reference to the publisher’s archiving policy available on the SHERPA/RoMEO website.|
|Appears in Collections:||Published Articles, Dept. of Physics and Astronomy|
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