Spectroscopy of nine eruptive young variables using TANSPEC

IF 1.1 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

Journal of Astrophysics and Astronomy Pub Date : 2023-05-29 DOI:10.1007/s12036-023-09939-7

Arpan Ghosh, Saurabh Sharma, Joe P. Ninan, Devendra K. Ojha, A. S. Gour, Rakesh Pandey, Tirthendu Sinha, Aayushi Verma, Koshvendra Singh, Supriyo Ghosh, Harmeen Kaur

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引用次数: 1

Abstract

In recent times, 3.6m Devasthal Optical Telescope (DOT) has been installed with an optical to near infra-red spectrograph, TANSPEC, which provides spectral coverage from 0.55 to 2.5 microns. Using TANSPEC, we have obtained a single epoch spectrum of a set, containing nine FUors and EXors. We have analysed line profiles of the sources and compared them with the previously published spectra of these objects. Comparing the line profile shapes with the existing theoretical predictions, we have tried to interpret the physical processes that are responsible for the current disc evolution and the present accretion dynamics. Our study has shown the importance of time-evolved spectroscopic studies for a better understanding of the evolution of the accretion a mechanisms. This in turn can help in the better characterization of the young stars displaying episodic accretion behavior.

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用TANSPEC分析9个年轻喷发变元的光谱

最近，3.6米的Devasthal光学望远镜(DOT)安装了一个光学到近红外光谱仪TANSPEC，它提供了0.55到2.5微米的光谱覆盖范围。利用TANSPEC，我们获得了一组包含9个FUors和EXors的单历元光谱。我们分析了光源的谱线，并将它们与先前发表的这些天体的光谱进行了比较。将线条轮廓形状与现有的理论预测进行比较，我们试图解释导致当前盘演化和当前吸积动力学的物理过程。我们的研究显示了时间演化光谱研究对于更好地理解吸积机制的演化的重要性。这反过来又有助于更好地描述年轻恒星表现出幕式吸积行为。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Astrophysics and Astronomy 地学天文-天文与天体物理

CiteScore

1.80

自引率

9.10%

发文量

审稿时长

>12 weeks

期刊介绍： The journal publishes original research papers on all aspects of astrophysics and astronomy, including instrumentation, laboratory astrophysics, and cosmology. Critical reviews of topical fields are also published. Articles submitted as letters will be considered.