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Arpan Ghosh, Saurabh Sharma, Joe Philip Ninan, Devendra Kumar Ojha, Aayushi Verma, Tarak Chand Sahu, Rakesh Pandey & Koshvendra Singh

Initial Results of our Spectro-photometric Monitoring of XZ Tau

(Volume 93 - Année 2024 — No 2 - Proceeedings of the 3rd BINA Workshop on the Scientific Potential of the Indo-Belgian Cooperation)
DOI: 10.25518/0037-9565.11795
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Abstract

We present here initial results of our spectro-photometric monitoring of XZ Tau. During our monitoring period, XZ Tau exhibited several episodes of brightness variations in timescales of months at optical wavelengths in contrast to the mid-infrared wavelengths. The color evolution of XZ Tau during this period suggests that the brightness variations are driven by changes in accretion from the disc. The mid-infrared light curve shows an overall decline in brightness by ∼ 0.5 and 0.7 magnitude respectively in WISE W1 (3.4 μm) and W2 (4.6 μm) bands. The emission profile of the hydrogen recombination lines along with that of Ca II IRT lines points towards magnetospheric accretion of XZ Tau. We have detected P Cygni profile in Hβ indicating of out-flowing winds from regions close to accretion. Forbidden transitions of oxygen are also detected, likely indicating jets originating around the central pre-main sequence star.

Keywords : Star formation, Young Stellar Object, Eruptive variables, Episodic Accretion

To cite this article

Arpan Ghosh, Saurabh Sharma, Joe Philip Ninan, Devendra Kumar Ojha, Aayushi Verma, Tarak Chand Sahu, Rakesh Pandey & Koshvendra Singh, «Initial Results of our Spectro-photometric Monitoring of XZ Tau», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 93 - Année 2024, No 2 - Proceeedings of the 3rd BINA Workshop on the Scientific Potential of the Indo-Belgian Cooperation, 560-571 URL : http://popups.ulg.be/0037-9565/index.php?id=11795.

About: Arpan Ghosh

Aryabhatta Research Institute of Observational Sciences (ARIES) Manora Peak, Nainital 263 001, India. Corresponding author: arpan@aries.res.in

About: Saurabh Sharma

Aryabhatta Research Institute of Observational Sciences (ARIES) Manora Peak, Nainital 263 001, India

About: Joe Philip Ninan

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

About: Devendra Kumar Ojha

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

About: Aayushi Verma

Aryabhatta Research Institute of Observational Sciences (ARIES) Manora Peak, Nainital 263 001, India

About: Tarak Chand Sahu

Aryabhatta Research Institute of Observational Sciences (ARIES) Manora Peak, Nainital 263 001, India

About: Rakesh Pandey

Physical Research Laboratory, Navrangpura, Ahmedabad - 380 009, India

About: Koshvendra Singh

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