32 citations · 139 across the 26 of their papers we have counts for
26 papers
A Dual-Band Centimetre Continuum Monitoring Survey of Young Stellar Objects in the Coronet Cluster
Johanan Ramírez-Arellano, Carlos Carrasco-González, Roberto Galván-Madrid +5
We present sensitive (9 Jy), sub-arcsecond resolution radio continuum observations at 9.0 GHz (3.3 cm) and 14.0 GHz (2.1 cm) obtained with the Karl G. Jansky Very Large Ar…
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…
Dissecting the morphology of star forming complex S193
Rakesh Pandey, Saurabh Sharma, Lokesh Dewangan +5
We have studied a star-forming complex S193 using near-infrared (NIR) observations and other archival data covering optical to radio wavelengths. We identified stellar clusters 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…
Exploring Stellar Cluster and Feedback-driven Star Formation in Galactic Mid-infrared Bubble [HKS2019] E70
Aayushi Verma, Saurabh Sharma, Kshitiz K. Mallick +8
We present a comprehensive analysis of the Galactic mid-infrared (MIR) bubble [HKS2019] E70 (E70) by adopting a multi-wavelength approach to understand the physical environment and…
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…
Investigating star formation activity in the Sh 2-61 H II region
Rakesh Pandey, Saurabh Sharma, Lokesh Dewangan +4
Using the multiwavelength data sets, we studied the star formation activity in H II region Sh 2-61 (hereafter S61). We identified a clustering in the region and estimated the membe…
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…
TIRCAM2 Fast Sub-array Readout Mode for Lunar Occultation studies
Milind B. Naik, Devendra K. Ojha, Saurabh Sharma +4
The TIFR Near Infrared Imaging Camera-II (TIRCAM2) is being used at the Devasthal Optical Telescope (DOT) operated by Aryabhatta Research Institute of Observational Sciences (ARIES…
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…
Kronberger 55: A Candidate for End-dominated Collapse Scenario
Aayushi Verma, Saurabh Sharma, Lokesh Dewangan +5
Using optical photometric observations from 1.3m Devasthal Fast Optical Telescope and deep near-infrared (NIR) photometric observations from TANSPEC mounted on 3.6m Devasthal Optic…
TANSPEC: TIFR-ARIES Near Infrared Spectrometer
Saurabh Sharma, Devendra K. Ojha, Arpan Ghosh +23
We present the design and performance of the TANSPEC, a medium-resolution m cryogenic spectrometer and imager, now in operation at the 3.6-m Devasthal Optical Telescope…
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…
Sh 2-301: a blistered H II region undergoing star formation
Rakesh Pandey, Saurabh Sharma, Lokesh K. Dewangan +6
We present a multiwavelength study of the H II region Sh 2-301 (S301) using deep optical data, near-infrared data, radio continuum data and other archival data at longer wavelength…
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…
The disintegrating old open cluster Czernik 3
Saurabh Sharma, Arpan Ghosh, D. K. Ojha +6
We have performed a detailed analysis of the Czernik 3 (Cz3) open cluster by using deep near-infrared photometry taken with TIRCAM2 on 3.6m Devasthal optical telescope along with t…
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…
TIFR Near Infrared Imaging Camera-II on the 3.6-m Devasthal Optical Telescope
T. Baug, D. K. Ojha, S. K. Ghosh +13
TIFR Near Infrared Imaging Camera-II is a closed-cycle Helium cryo-cooled imaging camera equipped with a Raytheon 512 x 512 pixels InSb Aladdin III Quadrant focal plane array havin…