The H II region W40 harbors a small group of young, hot stars behind roughly 9 magnitudes of visual extinction. We have detected gaseous carbon monoxide (CO) and diatomic carbon (C2) in absorption toward the star W 40 IRS 1a. The 2-0 R0, R1, and R2 lines of 12CO at 2.3 μm were measured using the CSHELL on the NASA IR Telescope Facility (with upper limits placed on R3, R4, and R5) yielding an NC...

TC18 titanium alloy is an essential material for aircraft landing gear. To reveal the wear and corrosion mechanisms of gear in service, a WC-12Co coating on substrate was prepared by High-Velocity Air-Fuel (HVAF) spraying based optimized process parameters, analysis microscopic characterization results materials involved performed. Based computational fluid dynamics (CFD) method, combustion rea...

ABSTRACT We have observed the large Bok globule CB 54 in 850-$\mu$m polarized light using POL-2 polarimeter on James Clerk Maxwell Telescope (JCMT). find that magnetic field periphery of shows a significant, ordered deviation from mean-field direction centre. This appears to correspond with extended but relatively weak 12CO outflow emanating Class 0 sources at centre globule. Energetics analysi...

We report our analyses of the multi-epoch (2015–2017) Atacama Large Millimeter/submillimeter Array (ALMA) archival data Class II binary system XZ Tau at Bands 3, 4, and 6. The millimeter dust-continuum images show compact, unresolved (r ≲ 15 au) circumstellar disks (CSDs) around individual stars, A B, with a projected separation ∼39 au. 12CO (2–1) emission associated those CSDs traces Keplerian...

ABSTRACT We reanalyse the Fermi-LAT (Large Area Telescope) GeV γ-ray emission in region of supernova remnant (SNR) G51.26+0.11 and investigate its interstellar molecular environment with CO line data. At energies, based on 13.2 yr data, extended observed this is resolved into a uniform-disc source (‘Src A’) significance 19.5σ point (4FGL J1924.3+1628) 4.2σ 0.2–500 GeV. With an angular radius ∼0...

To study the protective effect of thermal spraying cobalt-based carbide coatings on hot-dip galvanized sinker rolls, a WC-12Co coating was prepared 316 L stainless steel substrate using supersonic flame method. The corroded in molten liquid zinc at 430 °C to analyze service life and failure process. results show that provided good protection base metal. process Zn first diffused into reacted ch...

I examine the possibility that the Cold Neutral Medium of the interstellar medium in galaxies contains a molecular gas phase that may represent a significant and even the dominant amount of its mass in metal-poor regions. In spiral galaxies such regions are found at large galactocentric distances where diffuse H2 gas will be untraceable through its feeble 12CO J=1–0 emission, the very lack of i...

MM-wave continuum emission from the Cassiopeia A SNR was mapped at 86 and 140 GHz using an on-the-fly beam-switching technique at NRAO’s 12m telescope on Kitt Peak. Global nebular mm-wave fluxes follow quite well the Sν ∝ ν−0.77 behaviour established previously at frequencies of 1-23 GHz and vary as Sν ∝ ν−0.763±0.008 over the entire range 1-140 GHz. The 86 GHz excess found earlier by Kenney & ...