NGC 7129附近五颗主序星的光度和光谱研究

IF 0.8 4区物理与天体物理 Q4 ASTRONOMY & ASTROPHYSICS

Serbian Astronomical Journal Pub Date : 2019-11-15 DOI:10.2298/SAJ1999039S

E. Semkov, S. Ibryamov, S. Peneva

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引用次数: 1

摘要

我们展示了对五颗主序星前恒星的长期光学光度和光谱观测结果，这些恒星位于明亮星云NGC 7129附近。我们在以恒星V391 Cep为中心的区域获得了UBVRI光度观测结果，该恒星位于明亮星云NGC 7129的西北部。我们的多色CCD观测时间跨度为1998年2月至2016年11月。在我们进行光度监测时，共获得了13个恒星的中等分辨率光谱。我们的光度研究结果表明，所有恒星在所有光学通带中都表现出强烈的可变性。这五颗恒星的长期光照曲线表明，典型的经典金牛座T星亮度变化幅度很大。我们没有在所有五颗恒星的亮度变化中发现任何可靠的周期性。光谱观测结果表明，所有被研究的恒星都可以被归类为经典的金牛座T星，其发射线光谱丰富，发射线的轮廓和强度变化很大。

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Photometric and spectroscopic study of five pre-main sequence stars in the vicinity of NGC 7129

We present results from long-term optical photometric and spectroscopic observations of five pre-main sequence stars, located in the vicinity of the bright nebula NGC 7129. We obtained UBVRI photometric observations in the field centered on the star V391 Cep, north-west of the bright nebula NGC 7129. Our multicolor CCD observations spanned the period from February 1998 to November 2016. At the time of our photometric monitoring, a total of thirteen medium-resolution optical spectra of the stars were obtained. The results from our photometric study show that all stars exhibit strong variability in all optical passbands. Long-term light curves of the five stars indicate the typical classical T Tauri star variations in brightness with large amplitudes. We did not find any reliable periodicity in the brightness variations of all five stars. The results from spectral observations showed that all studied stars can be classified as classical T Tauri stars with rich emission line spectra and strong variability in profiles and intensity of emission lines.

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来源期刊

Serbian Astronomical Journal ASTRONOMY & ASTROPHYSICS-

CiteScore

1.00

自引率

0.00%

发文量

审稿时长

12 weeks

期刊介绍： Serbian Astronomical Journal publishes original observations and researches in all branches of astronomy. The journal publishes: Invited Reviews - review article on some up-to-date topic in astronomy, astrophysics and related fields (written upon invitation only), Original Scientific Papers - article in which are presented previously unpublished author''s own scientific results, Preliminary Reports - original scientific paper, but shorter in length and of preliminary nature, Professional Papers - articles offering experience useful for the improvement of professional practice i.e. article describing methods and techniques, software, presenting observational data, etc. In some cases the journal may publish other contributions, such as In Memoriam notes, Obituaries, Book Reviews, as well as Editorials, Addenda, Errata, Corrigenda, Retraction notes, etc.