32 citations · 139 across the 26 of their papers we have counts for
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Unveiling the Dual Nature of V1180 Cas: UXor-like Dips and EXor-like Bursts Across a Decade
Tarak Chand, Saurabh Sharma, Koshvendra Singh +15
We present a detailed analysis of the long-term photometric and spectroscopic evolution of V1180 Cas over a decade, aiming to identify the dominant mechanisms behind its variabilit…
NGC 2392 and NGC 4361: Spectroscopic Diagnostics of Planetary Nebula Evolution
Atul Kumar Singh, Saurabh Sharma, Rahul Kumar Anand +3
The study presents a detailed spectroscopic analysis of the planetary nebulae (PNe) NGC~2392 and NGC~4361 using optical spectra obtained from the 2-m Himalayan Chandra Telescope (H…
Initial results of our spectro-photometric monitoring of XZ Tau
Arpan Ghosh, Saurabh Sharma, Joe Philip Ninan +5
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 timesca…
Accretion Funnel Reconfiguration during an Outburst in a Young Stellar Object: EX Lupi
Koshvendra Singh, Joe P. Ninan, Marina M. Romanova +14
EX Lupi, a low-mass young stellar object, went into an accretion-driven outburst in March of 2022. The outburst caused a sudden phase change of ~ 112 5 in…
Optical spectroscopy of Gaia detected protostars with DOT: can we probe protostellar photospheres?
Mayank Narang, Manoj Puravankara, Himanshu Tyagi +7
Optical spectroscopy offers the most direct view of the stellar properties and the accretion indicators. Standard accretion tracers, such as , , and, Ca II triplet lines, a…
Post-outburst evolution of bonafide FUor V2493 Cyg: A Spectro-photometric monitoring
Arpan Ghosh, Saurabh Sharma, Joe P. Ninan +11
We present here the results of eight years of our near-simultaneous optical/near-infrared spectro-photometric monitoring of bonafide FUor candidate `V2493 Cyg' starting from 2013 S…
Structural Analysis of Open Cluster Bochum 2
Harmeen Kaur, Saurabh Sharma, Alok Durgapal +5
We present the results from our deep optical photometric observations of Bochum 2 (Boc2) star cluster obtained using the m Devasthal Fast Optical Telescope along with archival…
Quiescence of an Outburst of a Low-Mass Young Stellar Object: LDN1415-IRS
Koshvendra Singh, Devendra K. Ojha, Joe P. Ninan +5
LDN1415-IRS, a low-mass young stellar object (YSO) went into an outburst between 2001 and 2006, illuminating a surrounding nebula, LDN1415-Neb. LDN1415-Neb was found to have bright…
Spectroscopy of 9 eruptive young variables using TANSPEC
Arpan Ghosh, Saurabh Sharma, Joe P. Ninan +8
In recent times, 3.6m Devasthal Optical Telescope (DOT) has installed an optical to near infra-red spectrograph, TANSPEC, which provides spectral coverage from 0.55-2.5 microns. Us…
Teutsch 76: a Deep Near-Infrared Study
Saurabh Sharma, Lokesh Dewangan, Neelam Panwar +9
We have performed a detailed analysis on the Teutsch 76 (T76) open cluster using the deep near-infrared (NIR) observations taken with the TANSPEC instrument mounted on the 3.6m Dev…
Gaia 20eae: A newly discovered episodically accreting young star
Arpan Ghosh, Saurabh Sharma, Joe. P. Ninan +18
The Gaia Alert System issued an alert on 2020 August 28, on Gaia 20eae when its light curve showed a 4.25 magnitude outburst. We present multi-wavelength photometric and spec…
PAH and nbL Features Detection in Planetary Nebulae NGC 7027 and BD +303639 with TIRCAM2 Instrument on 3.6m DOT
Rahul Kumar Anand, Shantanu Rastogi, Brijesh Kumar +4
High resolution infrared imaging observations of the young Planetary Nebulae NGC 7027 and BD +303639, taken with the newly installed TIFR Infrared Camera-II (TIRCAM2) on 3.6m Devas…
Further milliarcsecond resolution results on cool giants and binary stars from lunar occultations at Devashtal
A. Richichi, Saurabh Sharma, T. Sinha +5
We report on 26 lunar occultation events observed in the context of a program started at Devasthal in 2017. In addition to the customary observations with the 1.3-m telescope, we r…
Stellar cores in the Sh 2-305 H II region
Rakesh Pandey, Saurabh Sharma, Neelam Panwar +6
Using our deep optical and near-infrared photometry along with multiwavelength archival data, we here present a detailed study of the Galactic H II region Sh 2-305, to understand t…