MNRAS-1994-Osborne-650-62.pdf (385.84 kB)
The discovery of RE 1307 + 535: the shortest period AM Her system
journal contribution
posted on 2016-01-27, 12:14 authored by Julian Paul Osborne, A. P. Beardmore, P. J. Wheatley, P. Hakala, M. G. Watson, K. O. Mason, B. J. M. Hassall, A. R. KingWe 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.
History
Citation
Monthly Notices Of The Royal Astronomical Society, 1994, 270 (3), pp. 650-662 (13)Author affiliation
/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Physics and AstronomyVersion
- VoR (Version of Record)
Published in
Monthly Notices Of The Royal Astronomical SocietyPublisher
Wiley-blackwellissn
0035-8711eissn
1365-2966Acceptance date
1994-05-06Copyright date
1994Available date
2016-01-27Publisher DOI
Publisher version
http://mnras.oxfordjournals.org/content/270/3/650.shortLanguage
enAdministrator link
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Keywords
Science & TechnologyPhysical SciencesAstronomy & AstrophysicsASTRONOMY & ASTROPHYSICSBINARIES, CLOSESTARS, INDIVIDUAL, RE 1307+535STARS, MAGNETIC FIELDSSTARS, VARIABLES, OTHERULTRAVIOLET, STARSX-RAY BINARIESCATACLYSMIC VARIABLESHERCULIS BINARYCYCLOTRON HUMPSBROWN DWARFSV834 CENEVOLUTIONSTARSPOLARIMETRYTEMPERATURE