論文

査読有り
2003年6月

In-the-gap SUUMa-type dwarf nova, Var73 Dra with a supercycle of about 60 days

ASTRONOMY & ASTROPHYSICS
  • D Nogami
  • M Uemura
  • R Ishioka
  • T Kato
  • K Torii
  • DR Starkey
  • K Tanabe
  • T Vanmunster
  • EP Pavlenko
  • VP Goranskij
  • EA Barsukova
  • O Antoniuk
  • B Martin
  • LM Cook
  • G Masi
  • F Mallia
  • 全て表示

404
3
開始ページ
1067
終了ページ
1075
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1051/0004-6361:20030509
出版者・発行元
EDP SCIENCES S A

An intensive photometric-observation campaign of the recently discovered SU UMa-type dwarf nova, Var73 Dra was conducted from 2002 August to 2003 February. We caught three superoutbursts in 2002 October, December and 2003 February. The recurrence cycle of the superoutburst (supercycle) is indicated to be similar to60 d, the shortest among the values known so far in SU UMa stars and close to those of ER UMa stars. The superhump periods measured during the first two superoutbursts were 0.104885(93) d, and 0.10623(16) d, respectively. A 0.10424(3)-d periodicity was detected in quiescence. The change rate of the superhump period during the second superoutburst was 1.7x10(-3), which is an order of magnitude larger than the largest value ever known. Outburst activity has changed from a phase of frequent normal outbursts and infrequent superoutbursts in 2001 to a phase of infrequent normal outbursts and frequent superoutbursts in 2002. Our observations are negative to an idea that this star is an related object to ER UMa stars in terms of the duty cycle of the superoutburst and the recurrence cycle of the normal outburst. However, to trace the superhump evolution throughout a superoutburst, and from quiescence more effectively, may give a fruitful result on this matter.

リンク情報
DOI
https://doi.org/10.1051/0004-6361:20030509
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000183339400026&DestApp=WOS_CPL
ID情報
  • DOI : 10.1051/0004-6361:20030509
  • ISSN : 0004-6361
  • Web of Science ID : WOS:000183339400026

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