論文

査読有り
2005年9月

HS0943+1404, a true intermediate polar

ASTRONOMY & ASTROPHYSICS
  • P Rodriguez-Gil
  • ,
  • BT Gansicke
  • ,
  • HJ Hagen
  • ,
  • D Nogami
  • ,
  • MAP Torres
  • ,
  • H Lehto
  • ,
  • A Aungwerojwit
  • ,
  • S Littlefair
  • ,
  • S Araujo-Betancor
  • ,
  • D Engels

440
2
開始ページ
701
終了ページ
709
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1051/0004-6361:20053141
出版者・発行元
EDP SCIENCES S A

We have identified a new intermediate polar, HS 0943+ 1404, as part of our ongoing search for cataclysmic variables in the Hamburg Quasar Survey. The orbital and white dwarf spin periods determined from time-resolved photometry and spectroscopy are P-orb similar or equal to 250 min and P-spin = 69.171 +/- 0.001 min, respectively. The combination of a large ratio P-spin/P-orb similar or equal to 0.3 and a long orbital period is very unusual compared to the other known intermediate polars. The magnetic moment of the white dwarf is estimated to be mu(1) similar to 10(34) Gcm(3), which is in the typical range of polars. Our extensive photometry shows that HS 0943+ 1404 enters into deep (similar to 3mag) low states, which are also a characteristic feature of polars. We therefore suggest that the system is a true "intermediate" polar that will eventually synchronise, that is, a transitional object between intermediate polars and polars. The optical spectrum of HS 0943+1404 also exhibits a number of unusual emission lines, most noticeably NII lambda 5680, which is likely to reflect enhanced nitrogen abundances in the envelope of the secondary.

リンク情報
DOI
https://doi.org/10.1051/0004-6361:20053141
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000231547400037&DestApp=WOS_CPL
ID情報
  • DOI : 10.1051/0004-6361:20053141
  • ISSN : 0004-6361
  • Web of Science ID : WOS:000231547400037

エクスポート
BibTeX RIS