Results 41 to 50 of about 434 (137)
ChemPlusChem, Volume 90, Issue 11, November 10, 2025.The presence of interstellar complex organic molecules (COMs) has been baffling astrochemists for a long time. Methyl formate and glycolaldehyde are widely detected but their abundances mismatch kinetic astrochemical model predictions. Here, the formation of these two COMs is characterized onto a mixed ice surface, highlighting the importance of ...
Jessica Perrero +3 more
wiley +1 more source
Hydrodynamic Modeling of the Interaction of Winds within a Collapsing Turbulent Gas Cloud
Advances in Astronomy, Volume 2015, Issue 1, 2015., 2015 By using the particle‐based code Gadget2, we follow the evolution of a gas giant molecular cloud, in which a set of gas particles representing the wind are created by a Monte Carlo scheme and suddenly move outwards from the cloud’s center. The particles representing the gas cloud initially have a velocity according to a turbulent spectrum built in a ...
Guillermo Arreaga-García +2 more
wiley +1 more source
PROTOSTARS AT LOW EXTINCTION IN ORION A [PDF]
The Astrophysical Journal, 2016 ABSTRACT In the list of young stellar objects (YSOs) compiled by Megeath et al. for the Orion A molecular cloud, only 44 out of 1208 sources found projected onto low extinction ( mag) gas are identified as protostars.
John Arban Lewis, Charles J. Lada
openaire +2 more sources
On the Magnetic Field Properties of Protostellar Envelopes in Orion
The Astrophysical Journal LettersWe present 870 μ m polarimetric observations toward 61 protostars in the Orion molecular clouds with ∼400 au (1″) resolution using the Atacama Large Millimeter/submillimeter Array.
Bo Huang +25 more
doaj +1 more source
Physicochemical Constraints on the Abiotic Polymerization of Nucleotides Into RNA
Journal of Geophysical Research: Biogeosciences, Volume 130, Issue 11, November 2025.Abstract One of the key steps in the origin of life is the polymerization of nucleotides into nucleic acids like RNA. We have quantified the energetic impact of temperature, pressure, and composition on the polymerization of nucleotides into RNA using the Gibbs function. These Gibbs energies have been used to calculate the probability that a nucleotide
D. E. LaRowe, J. M. Dick
wiley +1 more source
DETECTION OF INFALL IN THE PROTOSTAR B335 WITH ALMA [PDF]
The Astrophysical Journal, 2015 11 pages, 5 figures, ApJ in ...
Neal J. Evans +6 more
openaire +6 more sources
Rotational Spectroscopy of the Acetone‐Water Complex: Large Amplitude Motions
ChemPhysChem, Volume 25, Issue 21, November 4, 2024.The structure and dynamics of the acetone‐water complex were explored using jet‐cooled rotational spectroscopy and computational chemistry calculations. Our detailed rot‐tunneling analyses of acetone‐H2O and −D2O revealed that the interaction with water disrupts the equivalence of the two methyl rotors, resulting in a significantly lower methyl rotor ...
Jiao Gao +4 more
wiley +1 more source
Interacting jets from binary protostars [PDF]
Astronomy & Astrophysics, 2007 We investigate potential models that could explain why multiple proto-stellar systems predominantly show single jets. During their formation, stars most frequently produce energetic outflows and jets. However, binary jets have only been observed in a very small number of systems. We model numerically 3D binary jets for various outflow parameters.
Murphy, G. C. +5 more
openaire +4 more sources
Formation of Methanol via Fischer‐Tropsch Catalysis by Cosmic Iron Sulphide
ChemPhysChem, Volume 25, Issue 17, September 2, 2024.Periodic quantum mechanical simulations evidence the potentiality to synthesise methanol through a Fischer‐Tropsch mechanism in different astrophysical environments facilitated by the catalytic properties of cosmic FeS grains, which are enhanced by the presence of naturally‐occurring point surface defects.
Berta Martinez‐Bachs +3 more
wiley +1 more source
Formation of Massive and Wide First-star Binaries in Radiation Hydrodynamic Simulations
The Astrophysical Journal, 2023 We study the formation of Population III stars by performing radiation hydrodynamic simulations for three different initial clouds extracted from cosmological hydrodynamic simulations.
Kazuyuki Sugimura +4 more
doaj +1 more source