Explanipedia

Identification of Outer Galaxy Cluster Members Using Gaia DR3 and Multidimensional Simulation Open

V. L. Patel, Joseph L. Hora, M. L. N. Ashby, S. Vig · 2025

The outer Galaxy presents a distinctive environment for investigating star formation. This study develops a novel approach to identify true cluster members based on unsupervised clustering using astrometry with significant uncertainties. A…

Identification of Outer Galaxy Cluster Members Using Gaia DR3 and Multidimensional Simulation Open

V. L. Patel, Joseph L. Hora, M. L. N. Ashby, S. Vig · 2025

The outer Galaxy presents a distinctive environment for investigating star formation. This study develops a novel approach to identify true cluster members based on unsupervised clustering using astrometry with significant uncertainties. A…

First detection of Circular Polarization in radio continuum towards a Massive Protostar Open

A. G. Cheriyan, S. Vig, Nirupam Roy, Samir Mandal, Carlos Carrasco‐González , et al. · 2025

Polarization measurements provide strong constraints on magnetic fields in star-forming systems. While magnetic field estimates of a few kiloGauss (kG) have been obtained near the surface of low-mass protostars, there are no analogous meas…

Helical Magnetic Field in a Massive Protostellar Jet Open

A. Rodríguez-Kamenetzky, Alice Pasetto, Carlos Carrasco‐González, Luis F. Rodrı́guez, José L. Gómez , et al. · 2025

Highly collimated outflows (jets) are observed across a wide range of astrophysical systems involving the accretion of material onto central objects, from supermassive black holes in active galaxies to proto-brown dwarfs and stellar-mass b…

Research on the interstellar medium and star formation in the Galaxy: An Indian perspective Open

B. Mookerjea, G. Maheswar, Kinsuk Acharyya, Tapas Baug, P. Datta , et al. · 2024

Reliability of In-band and Broadband Spectral Index Measurement: Systematic Study of the Effect of Signal-to-noise Ratio for uGMRT Data Open

Md. Abdur Rashid, Nirupam Roy, J. D. Pandian, Prasun Dutta, R. Dokara , et al. · 2024

Low-radio-frequency spectral index measurements are a powerful tool for distinguishing between different emission mechanisms and, in turn, understanding the nature of the sources. Besides the standard method of estimating the “broadband” s…

Reliability of in-band and broadband spectral index measurement: systematic study of the effect of signal to noise for uGMRT data Open

Md. Abdur Rashid, Nirupam Roy, J. D. Pandian, Prasun Dutta, R. Dokara , et al. · 2024

Low radio frequency spectral index measurements are a powerful tool to distinguish between different emission mechanisms and, in turn, to understand the nature of the sources. Besides the standard method of estimating the ``broadband" spec…

UVIT/AstroSat observation of TW Hya Open

Prasanta K. Nayak, Mayank Narang, P. Manoj, D. K. Ojha, Blesson Mathew , et al. · 2024

The paper demonstrates the spectroscopic and photometric capabilities of the Ultra-Violet Imaging Telescope (UVIT) to study T-Tauri stars (TTSs). We present the first UVIT/Far-UV spectrum of a TTS, TW Hya. Based on C IV line luminosity, we…

Massive star formation in the hub–filament system of RCW 117 Open

Arun Seshadri, S. Vig, S K Ghosh, D. K. Ojha · 2023

We present a multiwavelength investigation of the hub–filament system RCW 117 (IRAS 17059-4132), which shows intricate filamentary features in the far-infrared, mapped using Herschel images. We obtain the column density and dust temperatur…

Massive star-formation in the hub-filament system of RCW 117 Open

Arun Seshadri, S. Vig, S. K. Ghosh, D. K. Ojha · 2023

We present a multiwavelength investigation of the hub-filament system RCW 117 (IRAS 17059-4132), which shows intricate filamentary features in the far-infrared, mapped using Herschel images. We obtain the column density and dust temperatur…

Fragmentation of Multiply Charged C10H8 Isomers Produced in keV Range Proton Collision Open

M. V. Vinitha, Pragya Bhatt, C. P. Safvan, S. Vig, Umesh Kadhane · 2023

The dissociation of multiply charged C10H8 isomers produced in fast proton collisions (velocities between 1.41 and 2.4 a.u.) is discussed in terms of their fundamental molecular dynamics, in particular the processes that produce different …

Probabilistic classification of infrared-selected targets for SPHEREx mission: in search of young stellar objects Open

Kiran Lakshmipathaiah, S. Vig, M. L. N. Ashby, Joseph L. Hora, Miju Kang , et al. · 2023

We apply machine learning algorithms to classify infrared (IR)-selected targets for NASA’s upcoming Spectro-Photometer for the History of the Universe, Epoch of Reionization and Ices Explorer (SPHEREx) mission. In particular, we are intere…

Metrewave Galactic Plane with the uGMRT (MeGaPluG) Survey: Lessons from the pilot study Open

R. Dokara, Nirupam Roy, K. M. Menten, S. Vig, Prasun Dutta , et al. · 2023

Context. The advent of wide-band receiver systems on interferometer arrays has enabled the undertaking of high-sensitivity and highresolution radio continuum surveys of the Galactic plane in a reasonable amount of telescope time. Yet, to d…

Metrewave Galactic Plane with the uGMRT (MeGaPluG) Survey: Lessons from the Pilot Study Open

R. Dokara, Nirupam Roy, K. M. Menten, S. Vig, Prasun Dutta , et al. · 2023

Context. The advent of wide-band receiver systems on interferometer arrays enables one to undertake high-sensitivity and high-resolution radio continuum surveys of the Galactic plane in a reasonable amount of telescope time. However, to da…

New radio lobes at parsec scale from the East-West protostellar jet RAFGL2591 Open

A. G. Cheriyan, S. Vig, Sreelekshmi Mohan · 2023

RAFGL2591 is a massive star-forming complex in the Cygnus-X region comprising of a cluster of embedded protostars and young stellar objects located at a distance of 3.33 kpc. We investigate low-frequency radio emission from the protostella…

The SPHEREx Target List of Ice Sources (SPLICES) Open

M. L. N. Ashby, Joseph L. Hora, Kiran Lakshmipathaiah, S. Vig, Rama Krishna Gorthi , et al. · 2023

One of the primary objectives of the SPHEREx mission is to understand the origin of molecules such as H 2 O, CO 2 , and other volatile compounds at the early stages of planetary system formation. Because the vast majority of these compound…

Fragmentation of Multiply Charged C10H8 Isomers Produced in keV Range Proton Collision Open

M. V. Vinitha, Pragya Bhatt, C. P. Safvan, S. Vig, Umesh Kadhane · 2023

Fragmentation processes of multiply charged ions of C10H8 isomers produced in fast proton collision (velocity between 1.41 and 2.4 a.u.) is discussed in view of their fundamental molecular dynamics. Especially so in the mechanisms to produ…

Editorial Open

Saurabh Sharma, S. Vig, Joe P. Ninan · 2023

Imaging of HH80-81 Jet in the Near-infrared Shock Tracers H2 and [Fe ii] Open

Sreelekshmi Mohan, S. Vig, W. P. Varricatt, Anandmayee Tej · 2023

The HH80-81 system is one of the most powerful jets driven by a massive protostar. We present new near-infrared (NIR) line imaging observations of the HH80-81 jet in the H 2 (2.122 μ m) and [Fe ii ] (1.644 μ m) lines. These lines trace not…

Imaging of HH80-81 jet in the NIR shock tracers H$_2$ and [Fe II] Open

Sreelekshmi Mohan, S. Vig, W. P. Varricatt, Anandmayee Tej · 2022

The HH80-81 system is one of the most powerful jets driven by a massive protostar. We present new near-infrared (NIR) line imaging observations of the HH80-81 jet in the H$_2$ (2.122 $μ$m) and [Fe II] (1.644 $μ$m) lines. These lines trace …

Investigating star-formation activity towards the southern H ii region RCW 42 Open

Vipin Kumar, S. Vig, V. S. Veena, Sreelekshmi Mohan, S. K. Ghosh , et al. · 2022

The star-forming activity in the H ii region RCW 42 is investigated using multiple wavebands, from near-infrared to radio wavelengths. Located at a distance of 5.8 kpc, this southern region has a bolometric luminosity of 1.8 × 106 L⊙. The …

Stellar populations of the globular cluster NGC 5053 investigated using AstroSat-Ultra Violet Imaging Telescope Open

K. J. Nikitha, S. Vig, S. K. Ghosh · 2022

Globular clusters (GCs), being old and densely packed, serve as ideal laboratories to test stellar evolution theories. Although there is enormous literature on GCs in optical bands, studies in the ultraviolet (UV) regime are sparse. In thi…

Radio spectra of protostellar jets: Thermal and non-thermal emission Open

Sreelekshmi Mohan, S. Vig, Samir Mandal · 2022

Protostellar jets and outflows are pointers of star-formation and serve as important sources of momentum and energy transfer to the interstellar medium. Radio emission from ionized jets have been detected towards a number of protostellar o…

The sharp ALMA view of infall and outflow in the massive protocluster G31.41+0.31 Open

M. T. Beltrán, V. M. Rivilla, R. Cesaroni, Daniele Galli, L. Moscadelli , et al. · 2022

Context. To better understand the formation of high-mass stars, it is fundamental to investigate how matter accretes onto young massive stars, how it is ejected, and how all this differs from the low-mass case. The massive protocluster G31…

Galatic HII region IRAS 17149$-$3916 -- A multiwavelength study Open

Ajay Potdar, Swagat Ranjan Das, Namitha Issac, Anandmayee Tej, S. Vig , et al. · 2021

This paper presents a multiwavelength investigation of the Galactic HII IRAS 17149$-$3916. Using the Giant Meterwave Radio Telescope, India, first low-frequency radio continuum observations at 610 and 1280 MHz for this region are presented…

The cold dust content of the nearby galaxies IC 5325, NGC 7496, NGC 7590, and NGC 7599 Open

Swapnil Singh, M. L. N. Ashby, S. Vig, S. K. Ghosh, T. H. Jarrett , et al. · 2021

Star-forming galaxies are rich reservoirs of dust, both warm and cold. But the cold dust emission is faint alongside the relatively bright and ubiquitous warm dust emission. Recently, evidence for a very cold dust (VCD) component has also …

[CII] emission properties of the massive star-forming region RCW 36 in a filamentary molecular cloud Open

T. Suzuki, Shinki Oyabu, S. K. Ghosh, D. K. Ojha, Hidehiro Kaneda , et al. · 2021

Aims. We investigate the properties of [C II ] 158 μm emission of RCW 36 in a dense filamentary cloud. Methods. [C II ] observations of RCW 36, covering an area of ~30′ × 30′, were carried out with a Fabry-Pérot spectrometer on board a 100…

Multiple RHB Populations in Globular Clusters - AstroSat NUV Photometry of Modelled Stars Open

D. Bhavana, S. Vig · 2020

This deposition consists of two datasets: RHBI.txt RHBII.txt These datasets contain the AstroSat UVIT photometry of 18 red horizontal branch (RHB) stars from the globular cluster NGC 2808, which were selected for modelling in the study tit…

Multiple RHB Populations in Globular Clusters - AstroSat NUV Photometry of Modelled Stars Open

D. Bhavana, S. Vig · 2020

This deposition consists of two datasets: RHBI.txt RHBII.txt These datasets contain the AstroSat UVIT photometry of 18 red horizontal branch (RHB) stars from the globular cluster NGC 2808, which were selected for modelling in the study tit…

Multiwavelength investigation of extended green object G19.88-0.53: revealing a protocluster Open

Namitha Issac, Anandmayee Tej, Tie Liu, W. P. Varricatt, S. Vig , et al. · 2020

A multiwavelength analysis of star formation associated with the extended green object, G19.88-0.53 is presented in this paper. With multiple detected radio and millimetre components, G19.88-0.53 unveils as harbouring a protocluster rather…

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