Abstract The formation of molecules in the interstellar medium (ISM) remains a complex and unresolved question astrochemistry. A group particular interest involves linkage between carboxyl amine group, similar to that peptide bond. detection containing these peptide-like bonds ISM can help elucidate possible mechanisms, as well indicate level molecular complexity available within certain region...

We present new infrared observations of the emission/reflection nebula IC 405 obtained with the Spitzer Space T elescope. Infrared images in the four IRAC bands (3.6, 4.5, 5.8, and 8.0 μm) and two MIPS bands (24 and 70 μm) are complemented by IRS spectroscopy (5 – 30 μm) of two nebular filaments. The IRAC (8.0 μm) and MIPS imaging shows evidence of a bow shock associated with the runaway O9.5V ...

Polycyclic aromatic hydrocarbons (PAHs) are common throughout the universe. Their detection and identification are based on the comparison of IR observations with laboratory spectra. Polycyclic aromatic nitrogen heterocycles (PANHs) are heterocyclic aromatics, i.e., PAHs with carbon atoms replaced by a nitrogen atom. These molecules should be present in the interstellar medium, but have receive...

An analysis of continuum antenna temperatures observed in the Green Bank Telescope (GBT) spectrometer bandpasses is presented for observations toward SgrB2(N-LMH). Since 2004, we have identified four new prebiotic molecules toward this source by means of rotational transitions between low energy levels; concurrently, we have observed significant continuum in GBT spectrometer bandpasses centered...

A gamma ray burst with strong optical-UV emission occuring in a molecular cloud will photodissociate H2, photoionize H2, H, and He, and destroy dust grains. We model these processes, including time-dependent radiative transfer in both continuum radiation and the resonance lines of H2. The UV will pump H2 into vibrationally-excited levels. We calculate the absorption spectrum imprinted on radiat...

We report the detection of the (1,1) and (2,2) metastable lines of ammonia (NH3) in the molecular cloud associated with the Wolf–Rayet (WR) nebula NGC2359. Besides the CO and H2, this is the first molecule detected in the environs of a WR star. Width (∆V1/2 = 3km s ) and radial velocity (VLSR ∼ 54 km s ) indicate that the NH3 lines arises from the molecular cloud which is interacting with the W...

We present the first results of the expected variations of the molecular line emission arising from material recently affected by C-shocks (shock precursors). Our parametric model of the structure of C-shocks has been coupled with a radiative transfer code to calculate the molecular excitation and line profiles of shock tracers such as SiO, and of ion and neutral molecules such as HCO and HNC, ...

We report the discovery of a high CO(J=3–2)/CO(J=1–0) ratio gas with an arc-like distribution (“high-ratio gas arc”) surrounding the central star cluster of the supergiant Hii region NGC 604 in the nearby spiral galaxy M 33, based on multi-J CO observations of a 5 × 5 region of NGC 604 conducted using the ASTE 10-m and NRO 45-m telescopes. The discovered “high-ratio gas arc” extends to the sout...

We have observed the Oph A-N6 prestellar core in the following transitions: N2D + J=3→2, DCO J=3→2 and J=5→4, HCO J=3→2, CS J=5→4 and J=7→6, and HCO J=3→2 and J=4→3, using the James Clerk Maxwell Telescope. We also observed the NH3 (1,1) and (2,2) inversion transitions towards the Oph A-N6 peak with the Green Bank Telescope. We have found that the N6 core is composed of shells of different chem...