Pre-main-sequence variable stars in young open cluster NGC 1893

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題名:	Pre-main-sequence variable stars in young open cluster NGC 1893
作者:	陳文屏;Lata, Sneh;Pandey, A. K.;Chen, W. P.;Maheswar, G.;Chauhan, Neelam
貢獻者:	理學院天文研究所
關鍵詞:	Accretion disks;Amplitudes;Astronomy;Cluster analysis;Clusters;Discs;Mass spectrometry;Massive stars;open clusters and associations: individual: NGC 1893;Spectral energy distribution;Stars & galaxies;stars: pre‐main‐sequence;stars: variables: T Tauri, Herbig Ae/Be;T Tauri stars;Variable stars;Variance analysis
日期:	2012-12-01
上傳時間:	2026-04-21 14:17:56 (UTC+8)
出版者:	Oxford University Press;Oxford, UK: Blackwell Science Ltd
摘要:	摘要： We present results of multi-epoch (14 nights during 2007-2010) V-band photometry of the cluster NGC 1893 region to identify photometric variable stars in the cluster. The study identified a total of 53 stars showing photometric variability. The members associated with the region are identified on the basis of spectral energy distribution, J − H/H − K two-colour diagram and V/V − I colour-magnitude diagram. The ages and masses of the majority of pre-main-sequence sources are found to be ≲5 Myr and in the range , respectively. These pre-main-sequence sources hence could be T Tauri stars. We also determined the physical parameters like disc mass and accretion rate from the spectral energy distribution of these T Tauri stars. The periods of majority of the T Tauri stars range from 0.1 to 20 d. The brightness of Classical T Tauri stars is found to vary with larger amplitude in comparison to weak line T Tauri stars. It is found that the amplitude decreases with increase in mass, which could be due to the dispersal of discs of massive stars. 其他題名： Mon. Not. R. Astron. Soc 出版者： Oxford, UK: Blackwell Science Ltd 出版日期： 2012-12-01 出處： Monthly notices of the Royal Astronomical Society, 2012-12, Vol.427 (2), p.1449-1462 資源來源： Alma/SFX Local Collection 版權： 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS 2012 版權： 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS 版權： Monthly Notices of the Royal Astronomical Society © 2012 RAS 識別號： ISSN: 0035-8711 識別號： ISSN: 1365-8711 識別號： ISSN: 1365-2966 識別號： EISSN: 1365-2966 識別號： DOI: 10.1111/j.1365-2966.2012.22070.x
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