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Spectroscopy of nine eruptive young variables using TANSPEC

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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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Notes

  1. https://github.com/astrosupriyo/pyTANSPEC.

  2. IRAF is distributed by National Optical Astronomy Observatories, USA, which is operated by the Association of Universities for Research in Astronomy, Inc., under cooperative agreement with National Science Foundation for performing image processing.

  3. UXor-type variability arises due to occultation of the central YSO by the matter present in the circumstellar disc.

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Acknowledgements

We thank the anonymous reviewer for valuable comments, which greatly improved the scientific content of the paper. TIFR–ARIES Near Infrared Spectrometer (TANSPEC) was built in collaboration with TIFR, ARIES and MKIR, Hawaii, for the DOT. We thank the staff at the 3.6m DOT, Devasthal (ARIES), for their co-operation during observations. It is a pleasure to thank the members of 3.6m DOT team and IR astronomy group at TIFR for their support during TANSPEC observations. SS acknowledges the support of the Department of Science and Technology, Government of India, under project no. DST/INT/Thai/P-15/2019. DKO acknowledges the support of the Department of Atomic Energy, Government of India, under project identification no. RTI 4002. JPN and DKO acknowledge the support of the Department of Atomic Energy, Government of India, under project identification no. RTI 4002.

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Authors and Affiliations

  1. Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital, 263001, India

    Arpan Ghosh, Saurabh Sharma & Aayushi Verma

  2. Department of Astronomy and Astrophysics, Tata Institute of Fundamental Research (TIFR), Mumbai, 400005, India

    Joe P. Ninan, Devendra K. Ojha & Koshvendra Singh

  3. School of Studies in Physics and Astrophysics, Pandit Ravishankar Shukla University, Raipur, 492010, India

    Arpan Ghosh & A. S. Gour

  4. Physical Research Laboratory, Navrangpura, Ahmedabad, 380009, India

    Rakesh Pandey

  5. Satyendra Nath Bose National Centre for Basic Sciences (SNBNCBS), Salt Lake, Kolkata, 700106, India

    Tirthendu Sinha

  6. University of Hertfordshire, Hatfield, AL10 9AB, UK

    Supriyo Ghosh

  7. Center of Advanced Study, Department of Physics, DSB Campus, Kumaun University, Nainital, 263001, India

    Harmeen Kaur

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  1. Arpan Ghosh
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Correspondence to Arpan Ghosh.

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This article is part of the Special Issue on “Star formation studies in the context of NIR instruments on 3.6m DOT”.

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Ghosh, A., Sharma, S., Ninan, J.P. et al. Spectroscopy of nine eruptive young variables using TANSPEC. J Astrophys Astron 44, 50 (2023). https://doi.org/10.1007/s12036-023-09939-7

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