Detection of Submillimeter Lines of CO (0.65 mm) and H2O (0.79 mm)

The Submillimeter Array 1.3 mm line survey of Arp 220

Context. Though Arp 220 is the closest and by far the most studied ULIRG, a discussion is still ongoing on the main power source driving its huge infrared luminosity. Aims. To study the molecular composition of Arp 220 in order to find chemical fingerprints associated with the main heating mechanisms within its nuclear region. Methods. We present the first aperture synthesis unbiased spectral l...

Room-temperature InAs0.89Sb0.11 photodetectors for CO detection at 4.6 mm

An InAs0.89Sb0.11 photovoltaic detector that operates at room temperature in the 2.5–5 mm mid-infrared wavelength region is reported. The photodiode has an extended spectral response compared with other currently available III–V room-temperature detectors. In order to accommodate the large lattice mismatch between the InAs0.89Sb0.11 active region and the InAs substrate, a buffer layer with an i...

Synthesis, characterization and hydrogen storage properties of Mm(Ni,Co,Mn,Al)5 alloy

The hydrogenation characterizations of the hydrogen storage alloy MmNi4.22Co0.48Mn0.15Al0.15 (Mm= mischmetal), and the effect of hydrogenation/dehydrogenation (H/D) cycling on its structural and morphological properties are investigated. The results indicate that after several H/D cycles the alloy was pulverized into fine particles, but it kept its hexagonal CaCu5-type structure. The pressure-c...

Mm Mm^ Fl

Detection of polarized mm and sub - mm emission from Sgr A ⋆

We report the detection of linear polarization from Sgr A⋆ at 750, 850, 1350 and 2000μm which confirms the contribution of synchrotron radiation. From the lack of polarization at longer wavelengths it appears to arise in the millimetre/sub-millimetre excess. There are large position angle changes between the millimetre and sub-millimetre results and these are discussed in terms of a polarized d...