کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5487754 | 1523720 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Photometry of some more neglected bright cataclysmic variables and candidates
ترجمه فارسی عنوان
عکاسی از بعضی متغیرها و نامزدهای تحریک پذیر نادیده گرفته شده
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
نجوم و فیزیک نجومی
چکیده انگلیسی
As part of an effort to better characterize bright cataclysmic variables (CVs) and related systems which have received little attention in the past light curves of four systems (V504â¯Cen, KTâ¯Eri, Retâ¯1 and CTCVâ¯2056-3014) are analyzed. For some of these stars no time resolved photometry has been published previously. While flickering is observed in all systems except Retâ¯1, it is particularly strong in V504â¯Cen and CTCVâ¯2056-3014. In the latter star, a previously observed 15.4â¯m period, leading to its tentative classification as an intermediate polar, is probably spurious. Variations on time scales of hundredths of days observed in the pre-outburst light curve of the classical nova KTâ¯Eri continue after the outburst but appear not to be strictly periodic. Furthermore, the long term post-outburst light curve exhibits modulations with quasi-periods of quite different length. Thus, these variations cannot be due to aspect related variations in a system with a giant component similar to some recurrent novae. Instead, the system possibly exhibits variations with a period of 0.1952â¯d which may be orbital. However, any such conclusion still requires confirmation. The absence of flickering in Retâ¯1 indicates that the system probably does not contain an accretion disk. Instead, the observation of slow variations supports a previous suspicion of low amplitude variability with a period â¯>12â¯h.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: New Astronomy - Volume 58, January 2018, Pages 53-60
Journal: New Astronomy - Volume 58, January 2018, Pages 53-60
نویسندگان
Albert Bruch,