Quantifying the efficiency of dust destruction in interstellar medium (ISM) due to supernovae (SNe) is crucial for understanding galactic evolution. We present 3D hydrodynamic simulations an SN blast wave propagating through ISM. The interaction between forward shock remnant and surrounding ISM leads by heated gas. consider processing ion sputtering, accretion atoms/molecules grain-grain collis...

Observations of W51 with Submillimeter Wave Astronomy Satellite (SWAS) have yielded the first detection of water vapor in a diffuse molecular cloud. The water vapor lies in a foreground cloud that gives rise to an absorption feature at an LSR velocity of 6 km s. The inferred water column density is 2.5 × 10 cm. Observations with the Arecibo radio telescope of hydroxyl molecules at ten positions...

Large organic molecules and carbon clusters are basic building blocks of life, but their existence in the universe has not been confirmed beyond doubt. A number of unidentified absorption features (arising in the diffuse inter-stellar medium), usually called “Diffuse Inter-stellar Bands (DIBs)”, are hypothesized to be produced by large molecules. Among these, buckminsterfullerene C60 has gained...

The detection of nucleobases in carbonaceous chondrites such as Murchison supports the scenario in which extraterrestrial organic molecules could have contributed to the origin of life on Earth. However, such large molecules have not been observed to date in astrophysical environments, in particular, comets and the interstellar medium (ISM). The physico-chemical conditions under which nucleobas...

The ejecta of evolved stars are among the most efficient chemical laboratories in Universe. Many compounds synthesized these environments probably travel along interstellar medium and may be ultimately delivered to planets. However, we still do not understand many processes at work during evolution from AGB phase PN. Here review key aspects our current understanding chemistry post-AGB envelopes...

In our quest for the presence of large complex molecules containing a majority carbon in interstellar medium (ISM), search graphene plays central role due to its nature making other structures. Although ingredients synthesis are present ISM, conclusive laboratory evidence such formation is lacking. Therefore, experiments simulating cold ISM conditions, we subjected icy mantles benzonitrile, an ...

We present chemical implications arising from spectral models fit to the Herschel/HIFI spectral survey toward the Orion Kleinmann-Low nebula (Orion KL). We focus our discussion on the 8 complex organics detected within the HIFI survey utilizing a novel technique to identify those molecules emitting in the hottest gas. In particular, we find the complex nitrogen bearing species CH3CN, C2H3CN, C2...

The HyGAL SOFIA legacy program surveys six hydride molecules -- ArH+, OH+, H2O+, SH, OH, and CH two atomic constituents C+ O within the diffuse interstellar medium (ISM) by means of absorption-line spectroscopy toward 25 bright Galactic background continuum sources. This detailed spectroscopic study is designed to exploit unique value specific hydrides as tracers probes different phases ISM, de...

We present the radial velocity structure of the molecular hydrogen outflows associated to the star forming region Cepheus A. This structure is derived from the doppler shift of the H2 v=1–0 S(1) emission line obtained by Fabry–Pérot spectroscopy. The East and West regions of emission, called Cep A (E) and Cep A (W), show radial velocities in the range of -20 to 0 km s with respect to the molecu...