Electrochemical CO2 reduction (CO2R) in acidic media with Cu-based catalysts tends to suffer from lowered selectivity towards multicarbon products. This could principle be mitigated using tandem catalysis, whereby the *CO coverage on Cu is increased by introducing a CO generating catalyst (e.g. Ag) close proximity. Although this has seen significant success neutral/alkaline media, here we repor...

s of articles which hae been published in A&A Supplement Series 141, No. 2 Imaging polarimetry of some selected dark clouds A.K. Sen, Ranjan Gupta, A.N. Ramaprakash and S.N. Tandon A set of eight Bok Globules CB3, CB25, CB39, CB52, CB54, CB58, CB62 and CB246 were observed polarimetrically in white light, using our Imaging Polarimeter (IMPOL), from the 1.2 m IR telescope at Mount Abu, India. The...

We present a multi-wavelength observational study towards the high-mass young stellar object G8.68−0.37. A single massive gas-and-dust core is observed in the (sub)millimetre continuum and molecular line emissions. We fitted the spectral energy distribution (SED) from the dust continuum emission. The best-fitting SED suggests the presence of two components with temperature of Td = 20 and 120 K,...

Aims. We study the circumstellar evolution of the binary HD 101584, consisting of a post-AGB star and a low-mass companion, which is most likely a post-common-envelope-evolution system. Methods. We used ALMA observations of the 12CO, 13CO, and C18O J = 2−1 lines and the 1.3 mm continuum to determine the morphology, kinematics, masses, and energetics of the circumstellar environment. Results. Th...

We present the results of the interferometric observations of the circumstellar disk surrounding MWC 297 in the continuum at 230 GHz (1.3 mm) and in the (J=2-1) rotational transitions of 12CO,13CO and C18O using the Submillimeter Array. At a distance of 250 pc, MWC 297 is one of the closest, young massive stars (M⋆ ∼10 M⊙) to us. Compact continuum emission is detected towards MWC 297 from which...

We present a survey of molecular gas in the J = 1→ 0 transition of 12CO towards the IRAS Vela shell. The shell, previously identified from IRAS maps, is a ring-like structure seen in the region of the Gum Nebula. We confirm the presence of molecular gas associated with some of the infrared point sources seen along the Shell. We have studied the morphology and kinematics of the gas and conclude ...

We report 12CO J = 3–2 high resolution observations of compact molecular outflows around VLA 1 and VLA 3, two young stellar objects in the HH 1–2 region. We have confirmed the existence of a new outflow associated with VLA 1, the powering source of these well known Herbig-Haro objects. The VLA 1 outflow exhibits redand blue-shifted peaks with a separation of only 30′′. The two lobes are clearly...

The J = 3 − 2 sub-mm line of 12CO has been observed with the Heinrich-Hertz-Telescope (HHT) toward a sample of 28 nearby galaxies, and toward Arp 220. All sources are detected. This is the largest extragalactic sample of CO 3 − 2 spectra published so far. The 3 − 2 line fluxes, I32, are compared to 1 − 0 and 2 − 1 fluxes measured with the IRAM 30m telescope. Model calculations show that the I32...