A5039962302- Astrophysics and Star Formation Studies
- Atmospheric Ozone and Climate
- Molecular Spectroscopy and Structure
- Stellar, planetary, and galactic studies
- Methane Hydrates and Related Phenomena
- Astronomy and Astrophysical Research
- Advanced Chemical Physics Studies
- Spectroscopy and Laser Applications
- Quantum, superfluid, helium dynamics
- Inorganic Fluorides and Related Compounds
- Astro and Planetary Science
- Chemical Synthesis and Analysis
- Geological Studies and Exploration
- History and advancements in chemistry
- Galaxies: Formation, Evolution, Phenomena
- Radioactive Decay and Measurement Techniques
- Spacecraft and Cryogenic Technologies
- Astrophysics and Cosmic Phenomena
- Molecular spectroscopy and chirality
- Astronomical Observations and Instrumentation
- Hydrocarbon exploration and reservoir analysis
- Pulsars and Gravitational Waves Research
Indian Centre for Space Physics
2018-2022
Indian Space Research Organisation
1997-2000
After hydrogen, oxygen, and carbon, nitrogen is one of the most chemically active species in interstellar medium (ISM). Nitrogen bearing molecules have great importance as they are actively involved formation biomolecules. Therefore, it essential to look for nitrogen-bearing various astrophysical sources, specifically around high-mass star-forming regions where evolutionary history comparatively poorly understood. In this paper, we report observation three potential pre-biotic molecules,...
92 h of new Whole Earth Telescope observations have been acquired for the δ Scuti star CD-24 7599. All seven pulsation modes reported by Handler et al. are confirmed. However, significant amplitude variations which not caused beating closely spaced frequencies occurred within two years. Analysing combined data both WET runs, we detect six further modes, bringing total number up to 13. We also examine our high-frequency pulsations similar those exhibited rapidly oscillating Ap stars, but do...
We consider six isomeric groups (CH3N, CH5N, C2H5N, C2H7N, C3H7N and C3H9N) to review the presence of amines aldimines within interstellar medium (ISM). Each these contains at least one aldimine or amine. Methanimine (CH2NH) from CH3N methylamine (CH3NH2) CH5N group were detected a few decades ago. Recently, ethanimine (CH3CHNH) C2H5N has been discovered in ISM. This prompted us investigate possibility detecting any amine very next three this sequence: C3H9N. employ high-level quantum...
Abstract G31.41+0.31 is a well known chemically rich hot molecular core (HMC). Using Band 3 observations from the Atacama Large Millimeter Array (ALMA), we have analyzed chemical and physical properties of source. We identified methyl isocyanate (CH NCO), precursor prebiotic molecules, toward In addition to this, reported presence complex organic molecules (COMs) like methanol OH), methanethiol SH), formate OCHO). Additionally, used transitions HCN, H 13 CO + , SiO trace infall outflow...
Abstract Phosphorus-related species are not known to be as omnipresent in space hydrogen, carbon, nitrogen, oxygen, and sulfur-bearing species. Astronomers spotted very few P-bearing molecules the interstellar medium circumstellar envelopes. Limited discovery of imposes severe constraints modeling P-chemistry. In this paper, we carry out extensive chemical models follow fate diffuse clouds, photon-dominated or photodissociation regions (PDRs), hot cores/corinos. We notice a curious...
We present a detailed mode identification performed on the 1994 Whole Earth Telescope (WET) run GD 358. The results are compared with that obtained for same star from 1990 WET data. two temporal spectra show very few qualitative differences, although amplitude changes seen in most modes, including disappearance of identified as k=14 excellent coverage and signal-to-noise ratio during lead to secure combination frequencies up fourth order, i.e. peaks sums or differences four parent...
Abstract The first identification of the argonium ion ( ) toward Crab Nebula supernova remnant was proclaimed by Herschel in submillimeter and far-infrared domains. Very recently, discovery hydro-helium cation planetary nebula (NGC 7027) SOFIA has been reported. elemental abundance neon is much higher than that argon. However, presence neonium ions yet to be confirmed space. Though hydroxyl radicals (−OH) are very abundant both neutral cationic forms, cations such noble gases (i.e., ArOH + ,...
Recent observations have shown that Nitrogen-bearing complex organic species are present in large quantities star-forming regions. Thus, investigating the N-bearing a hot molecular core, such as G10.47+0.03, is crucial to understanding complexity They also allow us investigate chemical and physical processes determine many phases during structural evolution of source The aim this study spatial distribution states molecules core G10.47+0.03. We used ALMA archival data extracted spectra were...
Since molecules are ubiquitous in space, the study of 'Molecular Universe' could unfold mystery existing Interstellar medium. Star formation is linked to chemical evolution processes. Thus, an analysis stars coupled with would give a clear insight into entire process. For example, various evolutionary stages star be probed by observing molecules. Chemical diagnostics these regions used extract physical properties (e.g., density, temperature, ionization degree, etc.) regions. Radiative...
Abstract The destiny of complex organic molecules (COMs) in star-forming regions is interlinked with various evolutionary phases. Therefore, identifying these species diversified environments identical would help to understand their physical and chemical heritage. We identified multiple COMs utilizing the Large Program Astrochemical Surveys At Institut de Radio Astronomie Millimétrique (IRAM) data, dedicated surveys Sun-like IRAM 30 m telescope. It was an unbiased survey millimeter regime,...
The destiny of complex organic molecules (COMs) in star-forming regions is interlinked with various evolutionary phases. Therefore, identifying these species diversified environments identical would help to comprehend their physical and chemical heritage. We identified multiple COMs utilizing the Large Program `Astrochemical Surveys At IRAM' (ASAI) data, dedicated surveys Sun-like IRAM 30 m telescope. It was an unbiased survey millimetre regime, covering prestellar core, protostar, outflow...