127 citations · 1.2k across the 82 of their papers we have counts for
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Jets and Outflows in Young Stellar Objects with the SKAO
Giovanni Sabatini, Gemma Busquet, Carlos Carrasco-González +48
Jets and outflows are ubiquitous phenomena associated with the formation of young stellar objects (YSOs). They play a crucial role in removing angular momentum from the accreting s…
An 18 - 25 GHz spectroscopic survey of southern hemisphere dense cores
Dariusz C. Lis, Karen Willacy, Liton Majumdar +3
We extended the radio K-band spectroscopic survey for organics in southern hemisphere dense cores by observing seven sources using NASA's Deep Space Network 70-m antenna in Canberr…
Gas-phase Elemental abundances in Molecular cloudS (GEMS) XI. The evolution of HCN, HNC, and N2H+ isotopic ratios in starless cores
A. Tasa-Chaveli, A. Fuente, G. Esplugues +5
Isotopic ratios have been used as chemical diagnostics to investigate the origin of the material in the Solar System. We have determined the HCN, HNC, and N2H+ isotopic ratios and…
Expanding the Ice Inventory of NGC 1333 IRAS 2A with INDRA using JWST Observations: Tracing Organic Refractories and Beyond
Prathap Rayalacheruvu, Liton Majumdar, W. R. M. Rocha +7
In the era of JWST, with its unprecedented sensitivity and spectral resolution, infrared spectral surveys have revealed a rich inventory of ices, including complex organic molecule…
Role of Diffusive and Non-Diffusive Grain-Surface Processes in Cold Cores: Insights from the PEGASIS Three-Phase Astrochemical Model
S. Maitrey, Liton Majumdar, Varun Manilal +4
Cold dense cores are unique among the structures found in the interstellar medium (ISM), as they harbor a rich chemical inventory, including complex organic molecules (COMs), which…
An 18-25 GHz spectroscopic survey of dense cores in the Chamaeleon I molecular cloud
Dariusz C. Lis, William D. Langer, Jorge L. Pineda +9
We extend the survey for organics in the southern hemisphere by observing two cores in the Chamaeleon complex using NASA's Deep Space Network 70-m antenna in Canberra, Australia, o…
Research on the Interstellar Medium and Star Formation in the Galaxy: An Indian Perspective
Bhaswati Mookerjea, Maheswar G., Kinsuk Acharyya +24
Although the star formation process has been studied for decades, many important aspects of the physics involved remain unsolved. Recent advancement of instrumentation in the infra…
The deuterium fractionation of NH in massive star-forming regions
Yuqiang Li, Junzhi Wang, Juan Li +6
Deuteration is sensitive to environmental conditions in star-forming regions. To investigate NHD chemistry, we compared the spatial distribution of ortho-NHD $1_{11}^s-1_{0…
A Yebes W band Line Survey towards an Unshocked Molecular Cloud of Supernova Remnant 3C391: Evidence of Cosmic-Ray-Induced Chemistry
Tian-Yu Tu, Prathap Rayalacheruvu, Liton Majumdar +3
Cosmic rays (CRs) have strong influences on the chemistry of dense molecular clouds (MCs). To study the detailed chemistry induced by CRs, we conducted a Yebes W band line survey t…
JOYS+: link between ice and gas of complex organic molecules. Comparing JWST and ALMA data of two low-mass protostars
Y. Chen, W. R. M. Rocha, E. F. van Dishoeck +16
A rich inventory of complex organic molecules (COMs) has been observed in high abundances in the gas phase toward Class 0 protostars. These molecules are suggested to be formed in…
Large-Scale Mapping Observations of DCN and DCO toward Orion KL
Kotomi Taniguchi, Prathap Rayalacheruvu, Teppei Yonetsu +14
We present emission maps (1.5'1.5' scale, corresponding to 0.18 pc) of the DCN () and DCO () lines in the 2 mm band toward the Orion KL region obtained wi…
Chemical Differentiation around Five Massive Protostars Revealed by ALMA -Carbon-Chain Species, Oxygen-/Nitrogen-Bearing Complex Organic Molecules-
Kotomi Taniguchi, Liton Majumdar, Paola Caselli +9
We present Atacama Large Millimeter/submillimeter Array Band 3 data toward five massive young stellar objects (MYSOs), and investigate relationships between unsaturated carbon-chai…
Vibrationally-excited Lines of HCN Associated with the Molecular Disk around the G24.78+0.08 A1 Hyper-compact H Region
Kotomi Taniguchi, Kei E. I. Tanaka, Yichen Zhang +7
We have analyzed Atacama Large Millimeter/submillimeter Array Band 6 data of the hyper-compact H region G24.78+0.08 A1 (G24 HC H) and report the detection…
Chemical compositions in the vicinity of protostars in Ophiuchus
Kotomi Taniguchi, Liton Majumdar, Adele Plunkett +6
We have analyzed Atacama Large Millimeter/submillimeter Array (ALMA) Cycle 4 Band 6 data toward two young stellar objects (YSOs), Oph-emb5 and Oph-emb9, in the Ophiuchus star-formi…
Evolutionary view through the starless cores in Taurus: deuteration in TMC 1-C and TMC 1-CP
D. Navarro-Almaida, A. Fuente, L. Majumdar +11
The chemical and physical evolution of starless and pre-stellar cores are of paramount importance to understanding the process of star formation. The Taurus Molecular Cloud cores T…
Probing Polarization and the Role of Magnetic Fields in Cloud Destruction in the Keyhole Nebula
Young Min Seo, C. Darren Dowell, Paul F. Goldsmith +2
We present polarimetric observations of the Keyhole Nebula in the Carina Nebula Complex carried out using the Stratospheric Observatory for Infrared Astronomy. The Keyhole Nebula l…
Chemical compositions of five Planck cold clumps
V. Wakelam, P. Gratier, M. Ruaud +4
Aims: Interstellar molecules form early in the evolutionary sequence of interstellar material that eventually forms stars and planets. To understand this evolutionary sequence, it…
Carbon-Chain Chemistry vs. Complex-Organic-Molecule Chemistry in Envelopes around Three Low-Mass Young Stellar Objects in the Perseus Region
Kotomi Taniguchi, Liton Majumdar, Shigehisa Takakuwa +4
We have analyzed ALMA Cycle 5 data in Band 4 toward three low-mass young stellar objects (YSOs), IRAS 03235+3004 (hereafter IRAS 03235), IRAS 03245+3002 (IRAS 03245), and IRAS 0327…
A New Method for Simulating Photoprocesses in Astrochemical Models
Ella Mullikin, Hannah Anderson, Natalie O'Hern +8
We propose a new model for treating solid-phase photoprocesses in interstellar ice analogues. In this approach, photoionization and photoexcitation are included in more detail, and…
Carbon Chain Chemistry in Hot-Core Regions around Three Massive Young Stellar Objects Associated with 6.7 GHz Methanol Masers
Kotomi Taniguchi, Eric Herbst, Liton Majumdar +7
We have carried out observations of CCH (), CHCN (), and three C isotopologues of HCN () toward three massive young stellar objects (MYSOs)…
Isomers in Interstellar Environments (I): The Case of Z- and E-Cyanomethanimine
Christopher N. Shingledecker, Germán Molpeceres, Víctor Rivilla +2
In this work, we present the results of our investigation into the chemistry of Z- and E-cyanomethanimine (HNCHCN), both of which are possible precursors to the nucleobase adenine.…
Protoplanetary disks: Sensitivity of the chemical composition to various model parameters
Valentine Wakelam, Edwige Chapillon, Anne Dutrey +4
Protoplanetary disks are challenging objects for astrochemical models due to strong density and temperature gradients and due to the UV photons 2D propagation. In this paper, we ha…
An Ammonia Spectral Map of the L1495-B218 Filaments in the Taurus Molecular Cloud: II CCS & HCN Chemistry and Three Modes of Star Formation in the Filaments
Young Min Seo, Liton Majumdar, Paul F. Goldsmith +22
We present deep CCS and HCN observations of the L1495-B218 filaments in the Taurus molecular cloud obtained using the K-band focal plane array on the 100m Green Bank Telescope.…
Methyl cyanide (CH3CN) and propyne (CH3CCH) in the low mass protostar IRAS 16293-2422
Ines Andron, Pierre Gratier, Liton Majumdar +4
Methyl cyanide (CH3CN) and propyne (CH3CCH) are two molecules commonly used as gas thermometers for interstellar gas. They are detected in several astrophysical environments and in…