activity
20232026
most citedSpectroscopy of 9 eruptive young variables using TANSPEC

5 citations · 8 across the 11 of their papers we have counts for

collaborators

12 papers

astro-ph.SR2026

SPICY 30021: an embedded bona fide FUor with a mid-infrared precursor

Zhen Guo, Calum Morris, Vitor Fermiano +37

Unstable mass accretion in young stellar objects (YSOs) often leads to observable outbursts, which play a key role in stellar mass assembly during pre-main-sequence evolution. The…

astro-ph.SR2026

Hot water emission during an outburst in a classical T Tauri star

Zhen Guo, Javier Osses, Vitor Fermiano +34

In this paper, we present observations of an eruptive young star in the Rosette Nebula, identified by the Gaia Science Alerts system using Gaia time series data. We aim to investig…

astro-ph.SR2026

Gaia24ccy: An outburst followed the footsteps of its predecessor

Koshvendra Singh, Joe P. Ninan, Zhen Guo +25

Accretion-driven outbursts in young stellar objects remain poorly understood, largely limited by a statistically small sample of closely followed-up events. This underscores the im…

astro-ph.SR2025

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…

astro-ph.SR2025★ 2 cited

Long-term investigation of an open cluster Berkeley 65

Tarak Chand, Saurabh Sharma, Koshvendra Singh +7

We present a decade-long investigation of a poorly studied cluster, Berkeley 65 (Be 65), using deep optical data from the telescopes of ARIES, Nainital Observatory. We estimate its…

astro-ph.GA2025

Magnetic fields in the massive star-forming region NGC 6334 and their relationship with the properties of dust filaments probed by [CII] and PAH emissions

Takayoshi Kusune, Hayata Tsuji, Shinki Oyabu +7

We carried out the near-infrared () imaging polarimetric observation with the polarimeter SIRPOL on the Infrared Survey Facility (IRSF) 1.4 m telescope and [CII] line…

astro-ph.SR2024

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…

astro-ph.SR2024

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…

astro-ph.IM2023

TIRCAM2 Camera Interface on the Side port of the 3.6 meter Devasthal Optical Telescope

Shailesh B. Bhagat, Milind B. Naik, Satheesha S. Poojary +10

The TIFR Near Infrared Imaging Camera-II (TIRCAM2) is being used at the 3.6 m Devasthal Optical Telescope (DOT) operated by Aryabhatta Research Institute of Observational Sciences…

astro-ph.SR2023★ 1 cited

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…

astro-ph.IM2023

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…

astro-ph.SR2023★ 5 cited

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…