Astrophysical observations show complex organic molecules (COMs) in the gas phase of protoplanetary disks. X-rays emitted from central young stellar object (YSO) that irradiate interstellar ices disk, followed by ejection phase, are a possible route to explain abundances observed cold regions. This process, known as X-ray photodesorption, needs be quantified for methanol-containing ices. We aim...

The interstellar medium contains dust and gas, in which at high densities cold conditions molecules can proliferate. Interstellar Complex Organic Molecules (iCOMs) are C-bearing species that contain least six atoms. As they detected young stellar objects, iCOMs expected to inhabit the early stages of star formation evolution. In this study, we try determine present outflow component massive pro...

We present the results of an Australia Telescope Compact Array (ATCA) survey for intra-day variability (IDV) of the total and polarized flux densities of 118 compact, flat spectrum, extragalactic radio sources from the Parkes 2.7 GHz Survey. A total of 22 total flux density IDV sources were discovered and 15 sources were found to show IDV of their polarized flux density. We discuss the statisti...

Abstract Interstellar Grains (IGs) spread in the Medium (ISM) host a multitude of chemical reactions that could lead to production interstellar Complex Organic Molecules (iCOMs), relevant context prebiotic chemistry. These IGs are composed silicate-based core covered by several layers amorphous water ice, known as grain mantle. from ISM gas-phase can be adsorbed at surfaces, diffuse and react g...

this study concerns about quantum chemical modeling behavior of 02 on cr (100)surface by using density functional theory (dft) by lanl2dz and 6 — 31g* basissets, we presented the results of our first principles electronic structure calculationson the 02 molecules and their interface with cr (100) surface. the chromium metalhas the body-centered cubic structure, and chromium cluster has five cr ...

Abstract A high degree of isomerism in the realm interstellar molecules stimulates systematic astronomical investigations members different families isomers. Among them, vinyl-bearing compounds have kindled considerable interest due to recent detections vinylamine, vinylacetylene, and vinylcyanoacetylene. Herein, we open possibility search for vinylketene space by means its rotational transitio...

Abstract With the presence of evermore complex S-bearing molecules being detected lately, studies their chemical formation routes need to keep up pace rationalize observations, suggest new candidates for detection, and provide input evolution models. In this paper, we theoretically characterize hydrogenation channels OCS on top amorphous solid water (ASW) as an interstellar dust grain analog in...