TYC 1417-891-1和TYC 1478-742-1:食变星。盖亚EDR3和TESS的光度数据

Pub Date : 2023-07-31 DOI:10.1007/s10511-023-09781-3

K. K. Gigoyan, K. S. Gigoyan, A. Sarkissian, M. Meftah, G. R. Kostandyan, F. Rahmatullaeva

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引用次数: 0

摘要

基于凌日系外行星测量卫星(TESS)的相位依赖光曲线，我们证实了两颗g型矮星TYC 1417-891-1和TYC 1478-742-1的食型变异性。两个物体均呈现EA (algoltype)光曲线形态。TYC 1417-891-1的轨道周期为P≈8.0天，TYC 1478-742-1的轨道周期为P≈13.6天。我们给出了Gaia EDR3和TESS收录的重要物理参数以及LAMOST光谱。这两个天体都相对明亮，距离分别为260.59(±3.21)pc (TYC 1417-891-1)和117.42(±0.74)pc (TYC 1478-742-1)。TYC 1478-742-1的TESS光曲线也显示出耀斑。我们讨论了这些恒星周围的次级和微弱天体的可能性质。

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TYC 1417-891-1 and TYC 1478-742-1: Eclipsing Variable Stars. The Gaia EDR3 and TESS Photometric Data

Based on the TESS (Transiting Exoplanet Survey Satellite) phase dependent light curves, we confirm the eclipsing type variability nature for two G-type dwarfs: TYC 1417-891-1 and TYC 1478-742-1. Both objects show EA (Algol-type) light curves morphology. Orbital period for TYC 1417-891-1 is P ≈ 8.0 day and for TYC 1478-742-1, P ≈ 13.6 day. We present Gaia EDR3 and TESS catalogue important physical parameters as well as LAMOST spectra. Both objects are relatively bright and are located at a distance of 260.59 (±3.21) pc (TYC 1417-891-1) and 117.42 (±0.74) pc (TYC 1478-742-1). The TESS light curve of TYC 1478-742-1 shows also flares as well. We discuss possible nature of the secondary and faint objects around these stars.

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