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Uncertainties in s-process nucleosynthesis in low-mass stars determined from Monte Carlo variations
(2018-08-21)
The main s-process taking place in low-mass stars produces about half of the elements heavier than iron. It is therefore very important to determine the importance and impact of nuclear physics uncertainties on this process. ...
The feedback of an HC H II region on its parental molecular core : The case of core A1 in the star-forming region G24.78+0.08
(2018-08-01)
Context. G24.78+0.08 is a well known high-mass star-forming region, where several molecular cores harboring OB young stellar objects are found inside a clump of size 1 pc. This article focuses on the most prominent of these ...
Concurrent formation of supermassive stars and globular clusters : implications for early self-enrichment
(2018-08-01)
We present a model for the concurrent formation of globular clusters (GCs) and supermassive stars (SMSs, ≳10 3M ⊙) to address the origin of the HeCNONaMgAl abundance anomalies in GCs. GCs form in converging gas flows and ...
A new near-IR window of low extinction in the Galactic plane
(2018-08-01)
Aims. The windows of low extinction in the Milky Way (MW) plane are rare but important because they enable us to place structural constraints on the opposite side of the Galaxy, which has hither to been done rarely. Methods. ...
A machine-learning method for identifying multi-wavelength counterparts of submillimeter galaxies : training and testing using AS2UDS and ALESS
(2018-07-27)
We describe the application of supervised machine-learning algorithms to identify the likely multiwavelength counterparts to submillimeter sources detected in panoramic, single-dish submillimeter surveys. As a training ...
Evolution of N/O ratios in galaxies from cosmological hydrodynamical simulations
(2018-07-21)
We study the redshift evolution of the gas-phase O/H and N/O abundances, both (i) for individual interstellar medium (ISM) regions within single spatially resolved galaxies and (ii) when dealing with average abundances in ...
An ALMA survey of the SCUBA-2 Cosmology Legacy Survey UKIDSS/UDS field : Identifying candidate z~4.5 [CII] emitters
(2018-07-10)
We report the results of a search for serendipitous [C ii] 157.74 μm emitters at z ≃ 4.4-4.7 using the Atacama Large Millimeter/submillimeter Array (ALMA). The search exploits the AS2UDS continuum survey, which covers ∼50 ...
Magnetic Fields toward Ophiuchus-B Derived from SCUBA-2 Polarization Measurements
(2018-07-01)
We present the results of dust emission polarization measurements of Ophiuchus-B (Oph-B) carried out using the Submillimetre Common-User Bolometer Array 2 (SCUBA-2) camera with its associated polarimeter (POL-2) on the ...
Extreme star formation in the Milky Way: luminosity distributions of young stellar objects in W49A and W51
(2018-07-01)
We have compared the star-formation properties of the W49A and W51 regions by using far-infrared data from the Herschel infrared Galactic Plane Survey (Hi-GAL) and 850-μm observations from the James Clerk Maxwell Telescope ...
Berkeley 51, a young open cluster with four yellow supergiants
(2018-07-01)
The heavily obscured open cluster Berkeley 51 shows characteristics typical of young massive clusters, even though the few previous studies have suggested older ages.We combine optical (UBV) and 2MASS photometry of the ...